Issue #303 Part 1: Move basilisk files from /browser to /application/basilisk

673 files changed, 0 insertions, 27249 deletions

diff --git a/browser/themes/LICENSE b/browser/themes/LICENSE
deleted file mode 100644
index 39d4f8fdf..000000000
--- a/browser/themes/LICENSE
+++ /dev/null
@@ -1,2 +0,0 @@
-All files in this directory are assumed to be licensed under the MPL 2 license
-which is used throughout this codebase.
diff --git a/browser/themes/linux/Info.png b/browser/themes/linux/Info.png
deleted file mode 100644
index d14479852..000000000
--- a/browser/themes/linux/Info.png
+++ /dev/null
diff --git a/browser/themes/linux/Privacy-16.png b/browser/themes/linux/Privacy-16.png
deleted file mode 100644
index 013cdc4b9..000000000
--- a/browser/themes/linux/Privacy-16.png
+++ /dev/null
diff --git a/browser/themes/linux/Security-broken.png b/browser/themes/linux/Security-broken.png
deleted file mode 100644
index 1ec110be4..000000000
--- a/browser/themes/linux/Security-broken.png
+++ /dev/null
diff --git a/browser/themes/linux/Toolbar-inverted.png b/browser/themes/linux/Toolbar-inverted.png
deleted file mode 100644
index 50a3d346f..000000000
--- a/browser/themes/linux/Toolbar-inverted.png
+++ /dev/null
diff --git a/browser/themes/linux/Toolbar-inverted@2x.png b/browser/themes/linux/Toolbar-inverted@2x.png
deleted file mode 100644
index 3472548d2..000000000
--- a/browser/themes/linux/Toolbar-inverted@2x.png
+++ /dev/null
diff --git a/browser/themes/linux/Toolbar-small.png b/browser/themes/linux/Toolbar-small.png
deleted file mode 100644
index 8f100a54a..000000000
--- a/browser/themes/linux/Toolbar-small.png
+++ /dev/null
diff --git a/browser/themes/linux/Toolbar.png b/browser/themes/linux/Toolbar.png
deleted file mode 100644
index cdd100aa5..000000000
--- a/browser/themes/linux/Toolbar.png
+++ /dev/null
diff --git a/browser/themes/linux/Toolbar@2x.png b/browser/themes/linux/Toolbar@2x.png
deleted file mode 100644
index 3244081c3..000000000
--- a/browser/themes/linux/Toolbar@2x.png
+++ /dev/null
diff --git a/browser/themes/linux/aboutSessionRestore-window-icon.png b/browser/themes/linux/aboutSessionRestore-window-icon.png
deleted file mode 100644
index a99832372..000000000
--- a/browser/themes/linux/aboutSessionRestore-window-icon.png
+++ /dev/null
diff --git a/browser/themes/linux/aboutSyncTabs.css b/browser/themes/linux/aboutSyncTabs.css
deleted file mode 100644
index 4cedad649..000000000
--- a/browser/themes/linux/aboutSyncTabs.css
+++ /dev/null
@@ -1,101 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-#tabs-display,
-#tabsList {
-  background-color: transparent;
-  -moz-appearance: none;
-  margin: 0;
-}
-
-#tabsList {
-  width: 100%;
-}
-
-#tabs-display {
-  background: #fff url(chrome://browser/skin/sync-bg.png) repeat-x center -80px;
-}
-
-#headers {
-  background: url(chrome://browser/skin/sync-32.png) no-repeat;
-  margin-top: 4px;
-  width: 45em;
-  height: 32px;
-  margin-inline-start: 2em;
-  margin-inline-end: 2em;
-}
-
-#tabsListHeading {
-  font-size: 140%;
-  font-weight: bold;
-  margin-inline-start: 40px;
-}
-
-richlistitem {
-  margin-inline-end: 2em;
-}
-
-richlistitem[selected="true"],
-richlistitem:focus {
-  outline-style: none;
-}
-
-richlistitem[type="tab"] {
-  min-height: 3em;
-  border: #999999 1px solid !important;
-  padding: 2px 5px;
-  margin-bottom: 4px;
-  margin-inline-start: 4em;
-  border-radius: 6px;
-  background-color: menu;
-  width: 44em;
-  opacity: 0.9;
-  box-shadow:
-    inset rgba(255, 255, 255, 0.5) 0 1px 0px,
-    inset rgba(0, 0, 0, 0.1) 0 -2px 0px,
-    rgba(0, 0, 0, 0.1) 0px 1px 0px;
-}
-
-richlistitem[type="tab"][selected="true"] {
-  background-color: -moz-MenuHover;
-}
-
-richlistitem[type="client"] {
-  min-height: 2em;
-  color: #000000;
-  margin-inline-start: 2em;
-  margin-top: 2px;
-  margin-bottom: 3px;
-  width: 42em;
-  border-radius: 6px;
-  background-color: transparent;
-  -moz-user-focus: ignore !important;
-}
-richlistitem.mobile[type="client"] {
-  list-style-image: url("chrome://browser/skin/sync-mobileIcon.svg#icon");
-}
-richlistitem.desktop[type="client"] {
-  list-style-image: url("chrome://browser/skin/sync-desktopIcon.svg#icon");
-}
-
-.title,
-.clientName {
-  color: #000000;
-  font-size: 1.1em;
-}
-
-.title[selected="true"],
-.url[selected="true"] {
-  color: inherit;
-}
-
-.url {
-  color: -moz-nativehyperlinktext;
-  font-size: 0.95em;
-}
-
-.tabIcon {
-  padding-inline-start: 2px;
-  padding-top: 2px;
-}
diff --git a/browser/themes/linux/actionicon-tab.png b/browser/themes/linux/actionicon-tab.png
deleted file mode 100644
index 433c25e1a..000000000
--- a/browser/themes/linux/actionicon-tab.png
+++ /dev/null
diff --git a/browser/themes/linux/browser-lightweightTheme.css b/browser/themes/linux/browser-lightweightTheme.css
deleted file mode 100644
index d3109bec3..000000000
--- a/browser/themes/linux/browser-lightweightTheme.css
+++ /dev/null
@@ -1,31 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-%include linuxShared.inc
-%filter substitution
-
-/*
- * LightweightThemeListener will append the current lightweight theme's header
- * image to the background-image for each of the following rulesets.
- */
-
-/* Lightweight theme on tabs */
-#tabbrowser-tabs:not([movingtab]) > .tabbrowser-tab > .tab-stack > .tab-background > .tab-background-start[selected=true]:-moz-lwtheme::before,
-#tabbrowser-tabs:not([movingtab]) > .tabbrowser-tab > .tab-stack > .tab-background > .tab-background-end[selected=true]:-moz-lwtheme::before {
-  background-attachment: scroll, fixed;
-  background-color: transparent;
-  background-image: @fgTabTextureLWT@;/*, lwtHeader;*/
-  background-position: 0 0, right top;
-  background-repeat: repeat-x, no-repeat;
-}
-
-#tabbrowser-tabs:not([movingtab]) > .tabbrowser-tab > .tab-stack > .tab-background > .tab-background-middle[selected=true]:-moz-lwtheme {
-  background-attachment: scroll, scroll, fixed;
-  background-color: transparent;
-  background-image: url(chrome://browser/skin/tabbrowser/tab-active-middle.png),
-                    @fgTabTextureLWT@;/*,
-                    lwtHeader;*/
-  background-position: 0 0, 0 0, right top;
-  background-repeat: repeat-x, repeat-x, no-repeat;
-}
diff --git a/browser/themes/linux/browser.css b/browser/themes/linux/browser.css
deleted file mode 100644
index 534d14834..000000000
--- a/browser/themes/linux/browser.css
+++ /dev/null
@@ -1,1569 +0,0 @@
-%if 0
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-%endif
-
-@import url("chrome://global/skin/");
-
-@namespace url("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul");
-@namespace html url("http://www.w3.org/1999/xhtml");
-@namespace svg url("http://www.w3.org/2000/svg");
-
-%include ../shared/browser.inc
-%include linuxShared.inc
-%filter substitution
-
-%define forwardTransitionLength 150ms
-%define conditionalForwardWithUrlbar window:not([chromehidden~="toolbar"]) #urlbar-wrapper
-
-:root {
-  --backbutton-urlbar-overlap: 6px;
-  /* icon width + border + horizontal padding (without the overlap from backbutton-urlbar-overlap) */
-  --forwardbutton-width: 25px;
-
-  --toolbarbutton-hover-background: rgba(255,255,255,.5) linear-gradient(rgba(255,255,255,.5), transparent);
-  --toolbarbutton-hover-bordercolor: rgba(0,0,0,.25);
-  --toolbarbutton-hover-boxshadow: none;
-
-  --toolbarbutton-active-background: rgba(154,154,154,.5) linear-gradient(rgba(255,255,255,.7), rgba(255,255,255,.4));
-  --toolbarbutton-active-bordercolor: rgba(0,0,0,.3);
-  --toolbarbutton-active-boxshadow: 0 1px 1px rgba(0,0,0,.1) inset, 0 0 1px rgba(0,0,0,.3) inset;
-
-  --toolbarbutton-checkedhover-backgroundcolor: rgba(200,200,200,.5);
-
-  --panel-separator-color: ThreeDShadow;
-  --arrowpanel-dimmed: hsla(0,0%,80%,.3);
-  --arrowpanel-dimmed-further: hsla(0,0%,80%,.45);
-  --arrowpanel-dimmed-even-further: hsla(0,0%,80%,.8);
-
-  --urlbar-separator-color: ThreeDShadow;
-}
-
-#menubar-items {
-  -moz-box-orient: vertical; /* for flex hack */
-}
-
-#main-menubar {
-  -moz-box-flex: 1; /* make menu items expand to fill toolbar height */
-}
-
-#navigator-toolbox {
-  -moz-appearance: none;
-  background-color: transparent;
-  border-top: none;
-}
-
-#navigator-toolbox::after {
-  content: "";
-  display: -moz-box;
-  -moz-box-ordinal-group: 101; /* tabs toolbar is 100 */
-  border-bottom: 1px solid ThreeDShadow;
-}
-
-#navigator-toolbox:-moz-lwtheme::after {
-  border-bottom-color: rgba(0,0,0,.3);
-}
-
-#navigator-toolbox > toolbar:not(#toolbar-menubar):not(#TabsToolbar):not(#addon-bar) {
-  background-image: linear-gradient(@toolbarHighlight@, @toolbarHighlight@);
-}
-
-#navigator-toolbox > toolbar:not(#toolbar-menubar):not(#TabsToolbar):not(#addon-bar):-moz-lwtheme {
-  background-image: linear-gradient(@toolbarHighlightLWT@, @toolbarHighlightLWT@);
-}
-
-#navigator-toolbox > toolbar:not(:-moz-lwtheme):not(#toolbar-menubar):not(#TabsToolbar) {
-  -moz-appearance: none;
-  border-style: none;
-  background-color: -moz-Dialog;
-}
-
-#navigator-toolbox > toolbar:not(#toolbar-menubar):not(#TabsToolbar):not(#nav-bar):not(#addon-bar) {
-  overflow: -moz-hidden-unscrollable;
-  max-height: 4em;
-  transition: min-height 170ms ease-out, max-height 170ms ease-out;
-  padding: 1px 4px;
-}
-
-#navigator-toolbox > toolbar:not(#toolbar-menubar):not(#TabsToolbar):not(#nav-bar):not(#addon-bar)[collapsed=true] {
-  min-height: 0.1px;
-  max-height: 0;
-  transition: min-height 170ms ease-out, max-height 170ms ease-out, visibility 170ms linear;
-}
-
-#TabsToolbar:not([collapsed="true"]) + #nav-bar {
-  border-top: 1px solid hsla(0,0%,0%,.3) !important;
-  background-clip: padding-box;
-  /* Move up into the TabsToolbar for the inner highlight at the top of the nav-bar */
-  margin-top: calc(-1 * var(--navbar-tab-toolbar-highlight-overlap));
-  /* Position the toolbar above the bottom of background tabs */
-  position: relative;
-  z-index: 1;
-}
-
-#nav-bar {
-  box-shadow: 0 1px 0 @navbarInsetHighlight@ inset;
-  padding-top: 2px;
-  padding-bottom: 2px;
-}
-
-#nav-bar-overflow-button {
-  -moz-image-region: rect(-5px, 12px, 11px, -4px);
-}
-
-/* This only has an effect when this element is placed on the bookmarks toolbar.
- * It's 30px to make sure buttons with 18px icons fit along with the default 16px
- * icons, without changing the size of the toolbar.
- */
-#personal-bookmarks {
-  min-height: 30px;
-}
-
-#browser-bottombox {
-  /* opaque for layers optimization */
-  background-color: -moz-Dialog;
-}
-
-/* Places toolbar */
-toolbarbutton.bookmark-item:not(.subviewbutton),
-#personal-bookmarks[cui-areatype="toolbar"]:not([overflowedItem=true]) > #bookmarks-toolbar-placeholder {
-  margin: 0;
-  padding: 2px 3px;
-}
-
-toolbarbutton.bookmark-item:not(.subviewbutton):not(:hover):not(:active):not([open]) {
-  color: inherit;
-}
-
-toolbarbutton.bookmark-item:not(.subviewbutton) {
-  -moz-appearance: none;
-  border: 1px solid transparent;
-  border-radius: 2px;
-  transition-property: background-color, border-color;
-  transition-duration: 150ms;
-}
-
-toolbarbutton.bookmark-item:not(.subviewbutton):hover:not([open]) {
-  background: var(--toolbarbutton-hover-background);
-  border-color: var(--toolbarbutton-hover-bordercolor);
-}
-
-toolbarbutton.bookmark-item:not(.subviewbutton):hover:active,
-toolbarbutton.bookmark-item[open="true"] {
-  background: var(--toolbarbutton-active-background);
-  box-shadow: var(--toolbarbutton-active-boxshadow);
-  border-color: var(--toolbarbutton-active-bordercolor);
-}
-
-toolbarbutton.bookmark-item:not(.subviewbutton):hover:-moz-lwtheme {
-  background: var(--toolbarbutton-hover-background);
-  border-color: var(--toolbarbutton-hover-bordercolor);
-}
-
-.bookmark-item > .toolbarbutton-icon,
-#personal-bookmarks[cui-areatype="toolbar"] > #bookmarks-toolbar-placeholder > .toolbarbutton-icon {
-  width: 16px;
-  height: 16px;
-}
-
-/* Force the display of the label for bookmarks */
-.bookmark-item > .toolbarbutton-text,
-#personal-bookmarks[cui-areatype="toolbar"] > #bookmarks-toolbar-placeholder > .toolbarbutton-text {
-  display: -moz-box !important;
-}
-
-.bookmark-item > .toolbarbutton-menu-dropmarker {
-  display: none;
-}
-
-/* Dropmarker for folder bookmarks */
-.bookmark-item[container] > .toolbarbutton-menu-dropmarker {
-  display: -moz-box !important;
-}
-
-#bookmarks-toolbar-placeholder {
-  list-style-image: url("chrome://browser/skin/places/bookmarksToolbar.png") !important;
-}
-
-toolbarpaletteitem[place="palette"] > #personal-bookmarks > #bookmarks-toolbar-placeholder,
-#personal-bookmarks[cui-areatype="menu-panel"] > #bookmarks-toolbar-placeholder {
-  list-style-image: url("chrome://browser/skin/places/bookmarksToolbar-menuPanel.png") !important;
-}
-
-/* ----- BOOKMARK STAR ANIMATION ----- */
-
-@keyframes animation-bookmarkAdded {
-  from { transform: rotate(0deg) translateX(-16px) rotate(0deg) scale(1); opacity: 0; }
-  60%  { transform: rotate(180deg) translateX(-16px) rotate(-180deg) scale(2.2); opacity: 1; }
-  80%  { opacity: 1; }
-  to   { transform: rotate(180deg) translateX(-16px) rotate(-180deg) scale(1); opacity: 0; }
-}
-
-@keyframes animation-bookmarkPulse {
-  from { transform: scale(1); }
-  50%  { transform: scale(1.3); }
-  to   { transform: scale(1); }
-}
-
-#bookmarked-notification-container {
-  min-height: 1px;
-  min-width: 1px;
-  height: 1px;
-  margin-bottom: -1px;
-  z-index: 5;
-  position: relative;
-}
-
-#bookmarked-notification {
-  background-size: 16px;
-  background-position: center;
-  background-repeat: no-repeat;
-  width: 16px;
-  height: 16px;
-  opacity: 0;
-}
-
-#bookmarked-notification-dropmarker-anchor {
-  z-index: -1;
-  position: relative;
-}
-
-#bookmarked-notification-dropmarker-icon {
-  width: 18px;
-  height: 18px;
-  visibility: hidden;
-}
-
-#bookmarked-notification-anchor[notification="finish"] > #bookmarked-notification {
-  background-image: url("chrome://browser/skin/places/bookmarks-notification-finish.png");
-  animation: animation-bookmarkAdded 800ms;
-  animation-timing-function: ease, ease, ease;
-}
-
-#bookmarks-menu-button[notification="finish"] > .toolbarbutton-menubutton-dropmarker > .dropmarker-icon {
-  list-style-image: none !important;
-}
-
-#bookmarked-notification-dropmarker-anchor[notification="finish"] > #bookmarked-notification-dropmarker-icon {
-  visibility: visible;
-  animation: animation-bookmarkPulse 300ms;
-  animation-delay: 600ms;
-  animation-timing-function: ease-out;
-}
-
-/* Bookmark menus */
-menu.bookmark-item,
-menuitem.bookmark-item {
-  min-width: 0;
-  max-width: 32em;
-}
-
-.bookmark-item:not(.subviewbutton) > .menu-iconic-left {
-  margin-top: 0;
-  margin-bottom: 0;
-}
-
-.bookmark-item > .menu-iconic-left > .menu-iconic-icon {
-  padding-inline-start: 0px;
-}
-
-/* Bookmark drag and drop styles */
-.bookmark-item[dragover-into="true"] {
-  background: Highlight !important;
-  color: HighlightText !important;
-}
-
-/* rules for menupopup drop indicators */
-.menupopup-drop-indicator-bar {
-  position: relative;
-  /* these two margins must together compensate the indicator's height */
-  margin-top: -1px;
-  margin-bottom: -1px;
-}
-
-.menupopup-drop-indicator {
-  list-style-image: none;
-  height: 2px;
-  margin-inline-end: -4em;
-  background-color: Highlight;
-}
-
-/* Bookmarks toolbar */
-#PlacesToolbarDropIndicator {
-  list-style-image: url(chrome://browser/skin/places/toolbarDropMarker.png);
-}
-
-/* Bookmark items */
-.bookmark-item {
-  list-style-image: url("chrome://mozapps/skin/places/defaultFavicon.png");
-}
-
-.bookmark-item[container] {
-  list-style-image: url("moz-icon://stock/gtk-directory?size=menu");
-}
-
-.bookmark-item[container][livemark] {
-  list-style-image: url("chrome://browser/skin/feeds/feedIcon16.png");
-}
-
-.bookmark-item[container][livemark] .bookmark-item {
-  list-style-image: url("chrome://browser/skin/places/livemark-item.png");
-  -moz-image-region: rect(0px, 16px, 16px, 0px);
-}
-
-.bookmark-item[container][livemark] .bookmark-item[visited] {
-  -moz-image-region: rect(0px, 32px, 16px, 16px);
-}
-
-.bookmark-item[container][query] {
-  list-style-image: url("chrome://browser/skin/places/query.png");
-}
-
-.bookmark-item[query][tagContainer] {
-  list-style-image: url("chrome://browser/skin/places/tag.png");
-}
-
-.bookmark-item[query][dayContainer] {
-  list-style-image: url("chrome://browser/skin/places/calendar.png");
-}
-
-.bookmark-item[query][hostContainer] {
-  list-style-image: url("moz-icon://stock/gtk-directory?size=menu");
-}
-
-.bookmark-item[query][hostContainer][open] {
-  list-style-image: url("moz-icon://stock/gtk-directory?size=menu");
-}
-
-.bookmark-item[cutting] > .toolbarbutton-icon,
-.bookmark-item[cutting] > .menu-iconic-left > .menu-iconic-icon {
-  opacity: 0.5;
-}
-
-.bookmark-item[cutting] > .toolbarbutton-text,
-.bookmark-item[cutting] > .menu-iconic-left > .menu-iconic-text {
-  opacity: 0.7;
-}
-
-/* Primary toolbar buttons */
-
-:-moz-any(toolbar, .widget-overflow-list) .toolbarbutton-1 > .toolbarbutton-icon,
-:-moz-any(toolbar, .widget-overflow-list) .toolbarbutton-1 > :-moz-any(.toolbarbutton-menubutton-button, .toolbarbutton-badge-stack) > .toolbarbutton-icon {
-  max-width: 16px;
-}
-
-:-moz-any(toolbar, .widget-overflow-list) .toolbarbutton-1:-moz-any(@primaryToolbarButtons@, .toolbarbutton-legacy-addon) > .toolbarbutton-icon,
-:-moz-any(toolbar, .widget-overflow-list) .toolbarbutton-1:-moz-any(@primaryToolbarButtons@, .toolbarbutton-legacy-addon) > :-moz-any(.toolbarbutton-menubutton-button, .toolbarbutton-badge-stack) > .toolbarbutton-icon,
-#bookmarks-menu-button[cui-areatype="toolbar"] > .toolbarbutton-menubutton-dropmarker > .dropmarker-icon {
-  max-width: 18px;
-}
-
-.findbar-button,
-:-moz-any(#TabsToolbar, #nav-bar) .toolbarbutton-1 > .toolbarbutton-menubutton-button,
-:-moz-any(#TabsToolbar, #nav-bar) .toolbarbutton-1 {
-  -moz-appearance: none;
-}
-
-:-moz-any(#TabsToolbar, #nav-bar) .toolbarbutton-1[open="true"],
-:-moz-any(#TabsToolbar, #nav-bar) .toolbarbutton-1:hover:active {
-  padding: 3px;
-}
-
-.findbar-button > .toolbarbutton-text,
-:-moz-any(#TabsToolbar, #nav-bar) .toolbarbutton-1 > .toolbarbutton-menubutton-button > .toolbarbutton-icon,
-:-moz-any(#TabsToolbar, #nav-bar) .toolbarbutton-1 > .toolbarbutton-menubutton-dropmarker > .dropmarker-icon,
-:-moz-any(#TabsToolbar, #nav-bar) .toolbarbutton-1 > .toolbarbutton-badge-stack,
-:-moz-any(#TabsToolbar, #nav-bar) .toolbarbutton-1 > .toolbarbutton-icon {
-  margin-inline-end: 0;
-  padding: 2px 6px;
-  border: 1px solid transparent;
-  border-radius: 2px;
-  transition-property: background-color, border-color;
-  transition-duration: 150ms;
-}
-
-:-moz-any(#TabsToolbar, #nav-bar) .toolbarbutton-1:not(:-moz-any(@primaryToolbarButtons@, .toolbarbutton-legacy-addon)) > .toolbarbutton-icon,
-:-moz-any(#TabsToolbar, #nav-bar) .toolbarbutton-1:not(:-moz-any(@primaryToolbarButtons@, .toolbarbutton-legacy-addon)) > .toolbarbutton-badge-stack,
-:-moz-any(#TabsToolbar, #nav-bar) .toolbarbutton-1:not(:-moz-any(@primaryToolbarButtons@, .toolbarbutton-legacy-addon)) > .toolbarbutton-menubutton-button > .toolbarbutton-icon {
-  padding: 3px 7px;
-}
-
-:-moz-any(#TabsToolbar, #nav-bar) .toolbarbutton-1 > .toolbarbutton-icon,
-:-moz-any(#TabsToolbar, #nav-bar) .toolbarbutton-1 > .toolbarbutton-menubutton-button > .toolbarbutton-icon,
-:-moz-any(#TabsToolbar, #nav-bar) #bookmarks-menu-button[cui-areatype="toolbar"] > .toolbarbutton-menubutton-dropmarker > .dropmarker-icon {
-  /* horizontal padding + border + actual icon width */
-  max-width: 32px !important /* bug 561154 */;
-}
-
-#nav-bar #PanelUI-menu-button {
-  padding-inline-start: 5px;
-  padding-inline-end: 5px;
-}
-
-.findbar-button:not(:-moz-any([checked="true"],[disabled="true"])):hover > .toolbarbutton-text,
-:-moz-any(#TabsToolbar, #nav-bar) .toolbarbutton-1[open]:not([disabled=true]) > .toolbarbutton-menubutton-button > .toolbarbutton-icon,
-:-moz-any(#TabsToolbar, #nav-bar) .toolbarbutton-1:not([disabled=true]):not([open]):hover > .toolbarbutton-menubutton-button > .toolbarbutton-icon,
-:-moz-any(#TabsToolbar, #nav-bar) .toolbarbutton-1:not([disabled=true]):not([open]):hover > .toolbarbutton-menubutton-dropmarker > .dropmarker-icon,
-:-moz-any(#TabsToolbar, #nav-bar) .toolbarbutton-1:not([disabled=true]):hover > .toolbarbutton-badge-stack,
-:-moz-any(#TabsToolbar, #nav-bar) .toolbarbutton-1:not([disabled=true]):hover > .toolbarbutton-icon {
-  background: var(--toolbarbutton-hover-background);
-  background-clip: padding-box;
-  border-color: var(--toolbarbutton-hover-bordercolor);
-  box-shadow: var(--toolbarbutton-hover-boxshadow);
-}
-
-:-moz-any(#TabsToolbar, #nav-bar) .toolbarbutton-1:hover > .toolbarbutton-menubutton-dropmarker > .dropmarker-icon,
-:-moz-any(#TabsToolbar, #nav-bar) .toolbarbutton-1[open] > .toolbarbutton-menubutton-dropmarker > .dropmarker-icon {
-  margin-top: 4px;
-  margin-bottom: 4px;
-}
-
-.findbar-button:not([disabled=true]):-moz-any([checked="true"],:hover:active) > .toolbarbutton-text,
-:-moz-any(#TabsToolbar, #nav-bar) .toolbarbutton-1 > .toolbarbutton-menubutton-button:not([disabled=true]):-moz-any(:hover:active, [open="true"]) > .toolbarbutton-icon,
-:-moz-any(#TabsToolbar, #nav-bar) .toolbarbutton-1[open="true"] > .toolbarbutton-menubutton-dropmarker:not([disabled=true]) > .dropmarker-icon,
-:-moz-any(#TabsToolbar, #nav-bar) .toolbarbutton-1:not([disabled=true]):-moz-any([open],[checked],:hover:active) > .toolbarbutton-badge-stack,
-:-moz-any(#TabsToolbar, #nav-bar) .toolbarbutton-1:not([disabled=true]):-moz-any([open],[checked],:hover:active) > .toolbarbutton-icon {
-  background: var(--toolbarbutton-active-background);
-  background-clip: padding-box;
-  box-shadow: var(--toolbarbutton-active-boxshadow);
-  border-color: var(--toolbarbutton-active-bordercolor);
-  transition-duration: 10ms;
-}
-
-:-moz-any(#TabsToolbar, #nav-bar) .toolbarbutton-1[checked]:not(:active):hover > .toolbarbutton-icon {
-  background-color: var(--toolbarbutton-checkedhover-backgroundcolor);
-  transition: background-color 150ms;
-}
-
-:-moz-any(#TabsToolbar, #nav-bar) .toolbarbutton-1 > .toolbarbutton-menubutton-button[open],
-:-moz-any(#TabsToolbar, #nav-bar) .toolbarbutton-1 > .toolbarbutton-menubutton-button:hover:active,
-:-moz-any(#TabsToolbar, #nav-bar) .toolbarbutton-1:hover:active {
-  padding: 3px;
-}
-
-:-moz-any(#TabsToolbar, #nav-bar) .toolbaritem-combined-buttons {
-  margin-left: 2px;
-  margin-right: 2px;
-}
-
-:-moz-any(#TabsToolbar, #nav-bar) .toolbaritem-combined-buttons > .toolbarbutton-1 {
-  padding-left: 0;
-  padding-right: 0;
-}
-
-:-moz-any(#TabsToolbar, #nav-bar) .toolbaritem-combined-buttons:not(:hover) > separator,
-:-moz-any(#TabsToolbar, #nav-bar) .toolbarbutton-1:not(:hover):not(:active):not([open]) > .toolbarbutton-menubutton-dropmarker::before {
-  content: "";
-  display: -moz-box;
-  width: 1px;
-  height: 18px;
-  margin-inline-end: -1px;
-  background-image: linear-gradient(currentColor 0, currentColor 100%);
-  background-position: center;
-  background-repeat: no-repeat;
-  background-size: 1px 18px;
-  opacity: .2;
-}
-
-:-moz-any(#TabsToolbar, #nav-bar)[brighttext] .toolbaritem-combined-buttons > separator,
-:-moz-any(#TabsToolbar, #nav-bar)[brighttext] .toolbarbutton-1:not(:hover):not(:active):not([open]) > .toolbarbutton-menubutton-dropmarker::before {
-  opacity: .3;
-}
-
-:-moz-any(#TabsToolbar, #nav-bar) .toolbarbutton-1 > .toolbarbutton-menubutton-dropmarker {
-  margin-inline-start: -4px;
-  margin-top: 3px;
-  margin-bottom: 3px;
-}
-
-:-moz-any(#back-button, #forward-button) > .toolbarbutton-icon {
-  border-color: var(--urlbar-border-color) !important /* bug 561154 */;
-}
-
-:-moz-any(#back-button, #forward-button):not(:hover):not(:active):not([open=true]) > .toolbarbutton-icon,
-:-moz-any(#back-button, #forward-button)[disabled=true] > .toolbarbutton-icon {
-  background-color: rgba(255,255,255,.25) !important /* bug 561154 */;
-  background-clip: padding-box;
-}
-
-#back-button {
-  padding-top: 2px;
-  padding-bottom: 2px;
-  padding-inline-start: 4px;
-  padding-inline-end: 0;
-  position: relative;
-  z-index: 1;
-  border-radius: 0 10000px 10000px 0;
-}
-
-#back-button:-moz-locale-dir(rtl) {
-  border-radius: 10000px 0 0 10000px;
-}
-
-#back-button > menupopup {
-  margin-top: -1px;
-}
-
-#back-button > .toolbarbutton-icon {
-  border-radius: 10000px;
-  padding: 6px;
-  max-width: 32px; /* horizontal padding + border + icon width */
-}
-
-#back-button:-moz-locale-dir(rtl) > .toolbarbutton-icon {
-  transform: scaleX(-1);
-}
-
-#forward-button {
-  -moz-box-align: stretch; /* let the button shape grow vertically with the location bar */
-  padding: 0;
-}
-
-#forward-button > .toolbarbutton-icon {
-  padding-left: calc(var(--backbutton-urlbar-overlap) + 3px);
-  padding-right: 3px;
-  border-left-style: none;
-  border-radius: 0;
-  max-width: calc(var(--forwardbutton-width) + var(--backbutton-urlbar-overlap));
-}
-
-@conditionalForwardWithUrlbar@:not([switchingtabs]) > #forward-button {
-  transition: margin-left @forwardTransitionLength@ ease-out;
-}
-
-@conditionalForwardWithUrlbar@ > #forward-button[disabled] {
-  margin-left: calc(0px - var(--forwardbutton-width) - var(--backbutton-urlbar-overlap));
-}
-
-@conditionalForwardWithUrlbar@:hover:not([switchingtabs]) > #forward-button[disabled] {
-  /* delay the hiding of the forward button when hovered to avoid accidental clicks on the url bar */
-  transition-delay: 100s;
-}
-
-@conditionalForwardWithUrlbar@:not(:hover) > #forward-button[disabled] {
-  /* when not hovered anymore, trigger a new transition to hide the forward button immediately */
-  margin-left: calc(-0.01px - var(--forwardbutton-width) - var(--backbutton-urlbar-overlap));
-}
-
-/* undo close tab menu item */
-#alltabs_undoCloseTab {
-  list-style-image: url(chrome://browser/skin/undoCloseTab.png);
-}
-
-.unified-nav-back[_moz-menuactive] {
-  list-style-image: url("moz-icon://stock/gtk-go-back-ltr?size=menu") !important;
-}
-.unified-nav-back[_moz-menuactive]:-moz-locale-dir(rtl) {
-  list-style-image: url("moz-icon://stock/gtk-go-back-rtl?size=menu") !important;
-}
-.unified-nav-forward[_moz-menuactive] {
-  list-style-image: url("moz-icon://stock/gtk-go-forward-ltr?size=menu") !important;
-}
-.unified-nav-forward[_moz-menuactive]:-moz-locale-dir(rtl) {
-  list-style-image: url("moz-icon://stock/gtk-go-forward-rtl?size=menu") !important;
-}
-
-/* Menu panel buttons */
-
-%include ../shared/toolbarbuttons.inc.css
-%include ../shared/menupanel.inc.css
-
-#main-window:not([customizing]) .toolbarbutton-1[disabled=true] > .toolbarbutton-icon,
-#main-window:not([customizing]) .toolbarbutton-1[disabled=true] > .toolbarbutton-menu-dropmarker,
-#main-window:not([customizing]) .toolbarbutton-1[disabled=true] > .toolbarbutton-menubutton-dropmarker,
-#main-window:not([customizing]) .toolbarbutton-1[disabled=true] > .toolbarbutton-menubutton-button > .toolbarbutton-icon,
-#main-window:not([customizing]) .toolbarbutton-1 > .toolbarbutton-menubutton-button[disabled=true] > .toolbarbutton-icon {
-  opacity: 0.4;
-}
-
-/* Fullscreen window controls */
-#window-controls {
-  -moz-box-align: start;
-  margin-inline-start: 10px;
-}
-
-#minimize-button {
-  list-style-image: url("chrome://global/skin/icons/Minimize.gif");
-}
-#restore-button {
-  list-style-image: url("chrome://global/skin/icons/Restore.gif");
-}
-#close-button {
-  list-style-image: url("chrome://global/skin/icons/Close.gif");
-}
-
-/* Location bar */
-#main-window {
-  --urlbar-border-color: ThreeDShadow;
-}
-
-#navigator-toolbox:-moz-lwtheme {
-  --urlbar-border-color: rgba(0,0,0,.3);
-}
-
-#urlbar,
-.searchbar-textbox {
-  -moz-appearance: none;
-  padding: 0;
-  border: 1px solid var(--urlbar-border-color);
-  border-radius: 2px;
-  background-clip: padding-box;
-  margin: 0 3px;
-}
-
-#urlbar[focused],
-.searchbar-textbox[focused] {
-  border-color: Highlight;
-}
-
-#urlbar {
-  background-color: -moz-field;
-}
-
-#urlbar:-moz-lwtheme,
-.searchbar-textbox:-moz-lwtheme {
-  background-color: rgba(255,255,255,.8);
-  color: black;
-}
-
-#urlbar:-moz-lwtheme[focused=true],
-.searchbar-textbox:-moz-lwtheme[focused=true] {
-  background-color: white;
-}
-
-.urlbar-textbox-container {
-  -moz-appearance: none;
-  -moz-box-align: stretch;
-}
-
-.urlbar-input-box {
-  margin-inline-start: 0;
-}
-
-.urlbar-input-box,
-#urlbar-display-box {
-  padding-inline-start: 4px;
-  border-inline-start: 1px solid var(--urlbar-separator-color);
-  border-image: linear-gradient(transparent 15%, var(--urlbar-separator-color) 15%, var(--urlbar-separator-color) 85%, transparent 85%);
-  border-image-slice: 1;
-}
-
-.urlbar-history-dropmarker {
-  -moz-appearance: toolbarbutton-dropdown;
-  transition: opacity 0.15s ease;
-}
-
-#urlbar-wrapper[switchingtabs] > #urlbar > .urlbar-textbox-container > .urlbar-history-dropmarker {
-  transition: none;
-}
-
-#navigator-toolbox:not(:hover) #nav-bar:not([customizing="true"]) #urlbar:not([focused]) > .urlbar-textbox-container > .urlbar-history-dropmarker {
-  opacity: 0;
-}
-
-#urlbar-container {
-  -moz-box-align: center;
-}
-
-@conditionalForwardWithUrlbar@ > #urlbar {
-  border-inline-start: none;
-  margin-left: 0;
-}
-
-@conditionalForwardWithUrlbar@ > #urlbar:-moz-locale-dir(ltr) {
-  border-top-left-radius: 0;
-  border-bottom-left-radius: 0;
-}
-
-@conditionalForwardWithUrlbar@ > #urlbar:-moz-locale-dir(rtl) {
-  border-top-right-radius: 0;
-  border-bottom-right-radius: 0;
-}
-
-@conditionalForwardWithUrlbar@ {
-  clip-path: url("chrome://browser/content/browser.xul#urlbar-back-button-clip-path");
-  margin-inline-start: calc(-1 * var(--backbutton-urlbar-overlap));
-}
-
-@conditionalForwardWithUrlbar@:-moz-locale-dir(rtl),
-@conditionalForwardWithUrlbar@ > #urlbar:-moz-locale-dir(rtl) {
-  /* let urlbar-back-button-clip-path clip the urlbar's right side for RTL */
-  transform: scaleX(-1);
-}
-
-@conditionalForwardWithUrlbar@:-moz-locale-dir(rtl) {
-  -moz-box-direction: reverse;
-}
-
-#urlbar-icons {
-  -moz-box-align: center;
-}
-
-.urlbar-icon {
-  padding: 0 3px;
-  /* 16x16 icon with border-box sizing */
-  width: 22px;
-  height: 16px;
-}
-
-/* ::::: URL Bar Zoom Reset Button ::::: */
-@keyframes urlbar-zoom-reset-pulse {
-  0% {
-    transform: scale(0);
-  }
-  75% {
-    transform: scale(1.5);
-  }
-  100% {
-    transform: scale(1.0);
-  }
-}
-
-#urlbar-zoom-button {
-  -moz-appearance: none;
-  margin: 0 3px;
-  font-size: .8em;
-  padding: 0 8px;
-  border-radius: 1em;
-  background-color: hsla(0,0%,0%,.05);
-  color: inherit;
-  border: 1px solid ThreeDLightShadow;
-}
-
-#urlbar-zoom-button[animate="true"] {
-  animation-name: urlbar-zoom-reset-pulse;
-  animation-duration: 250ms;
-}
-
-#urlbar-zoom-button:hover {
-  background-color: hsla(0,0%,0%,.1);
-}
-
-#urlbar-zoom-button:hover:active {
-  background-color: hsla(0,0%,0%,.15);
-}
-
-#urlbar-zoom-button > .toolbarbutton-text {
-  display: -moz-box;
-}
-
-#urlbar-zoom-button > .toolbarbutton-icon {
-  display: none;
-}
-
-#urlbar-search-footer {
-  border-top: 1px solid var(--panel-separator-color);
-  background-color: var(--arrowpanel-dimmed);
-}
-
-#urlbar-search-settings {
-  -moz-appearance: none;
-  -moz-user-focus: ignore;
-  color: GrayText;
-  margin: 0;
-  border: 0;
-  padding: 8px 20px;
-  background: transparent;
-}
-
-#urlbar-search-settings:hover {
-  background-color: var(--arrowpanel-dimmed);
-}
-
-#urlbar-search-settings:hover:active {
-  background-color: var(--arrowpanel-dimmed-further);
-}
-
-#urlbar-search-splitter {
-  -moz-appearance: none;
-  width: 8px;
-  margin-inline-start: -4px;
-}
-
-#urlbar-search-splitter + #search-container > #searchbar > .searchbar-textbox {
-  margin-inline-start: 0;
-}
-
-#urlbar-display-box {
-  margin-top: -1px;
-  margin-bottom: -1px;
-}
-
-.urlbar-display {
-  margin-top: 0;
-  margin-bottom: 0;
-  margin-inline-start: 0;
-  color: GrayText;
-}
-
-%include ../shared/urlbarSearchSuggestionsNotification.inc.css
-
-#search-container {
-  min-width: calc(54px + 11ch);
-}
-
-/* identity box */
-
-#identity-box:-moz-locale-dir(ltr) {
-  border-top-left-radius: 1.5px;
-  border-bottom-left-radius: 1.5px;
-}
-
-#identity-box:-moz-locale-dir(rtl) {
-  border-top-right-radius: 1.5px;
-  border-bottom-right-radius: 1.5px;
-}
-
-#identity-box:-moz-focusring {
-  outline: 1px dotted;
-  outline-offset: -3px;
-}
-
-%include ../shared/identity-block/identity-block.inc.css
-
-%include ../shared/notification-icons.inc.css
-
-.popup-notification-body[popupid="addon-progress"],
-.popup-notification-body[popupid="addon-install-confirmation"] {
-  width: 28em;
-  max-width: 28em;
-}
-
-.addon-install-confirmation-name {
-  font-weight: bold;
-}
-
-/* Notification icon box */
-
-.notification-anchor-icon:-moz-focusring {
-  outline: 1px dotted -moz-DialogText;
-}
-
-/* Translation infobar */
-
-%include ../shared/translation/infobar.inc.css
-
-notification[value="translation"] {
-  min-height: 40px;
-}
-
-notification[value="translation"],
-notification[value="translation"] button,
-notification[value="translation"] menulist {
-  min-height: 30px;
-  color: #5A5959;
-}
-
-notification[value="translation"] {
-  background-color: #F2F1F0;
-}
-
-notification[value="translation"] button,
-notification[value="translation"] menulist {
-  padding-inline-end: 1ch;
-}
-
-notification[value="translation"] menulist {
-  border: 1px solid #C1C1C1;
-  background-color: #FFF;
-}
-
-notification[value="translation"] button {
-  border: 1px solid #C1C1C1;
-  background-color: #F2F1F0;
-}
-
-notification[value="translation"] button,
-notification[value="translation"] menulist,
-notification[value="translation"] menulist > .menulist-label-box {
-  margin-inline-start: 1ch;
-  margin-inline-end: 1ch;
-}
-
-notification[value="translation"] button:hover,
-notification[value="translation"] button:active,
-notification[value="translation"] menulist:hover,
-notification[value="translation"] menulist:active {
-  background-color: #E2E1E0;
-}
-
-notification[value="translation"] button[anonid="translate"] {
-  color: #FFF;
-  background-image: linear-gradient(#9FB938, #8DA726);
-  box-shadow: none;
-  border: 1px solid #829C1C;
-}
-
-notification[value="translation"] button[anonid="translate"]:hover,
-notification[value="translation"] button[anonid="translate"]:active {
-  background-image: linear-gradient(#8DA726, #8DA726);
-}
-
-notification[value="translation"] button > .button-box,
-notification[value="translation"] button[type="menu"] > .button-box > .button-menu-dropmarker {
-  padding: 0;
-  margin-inline-start: 3ch;
-}
-
-notification[value="translation"] button:not([type="menu"]) > .button-box {
-  margin-inline-end: 3ch;
-}
-
-notification[value="translation"] menulist > .menulist-dropmarker {
-  display: block;
-}
-
-/* AutoComplete */
-
-%include ../shared/autocomplete.inc.css
-
-#PopupAutoComplete > richlistbox > richlistitem[originaltype~="datalist-first"] {
-  border-top: 1px solid ThreeDShadow;
-}
-
-#treecolAutoCompleteImage {
-  max-width : 36px;
-}
-
-.autocomplete-richlistbox {
-  padding: 4px;
-}
-
-.autocomplete-richlistitem {
-  height: 30px;
-  min-height: 30px;
-  font: message-box;
-  border-radius: 2px;
-  border: 1px solid transparent;
-}
-
-.autocomplete-richlistitem[selected=true] {
-  background-color: Highlight;
-}
-
-.ac-title {
-  font-size: 1.05em;
-}
-
-.ac-tags {
-  font-size: 0.9em;
-}
-
-html|span.ac-tag {
-  background-color: MenuText;
-  color: Menu;
-  border-radius: 2px;
-  border: 1px solid transparent;
-  padding: 0 1px;
-}
-
-.ac-separator,
-.ac-url,
-.ac-action {
-  font-size: 0.9em;
-  color: -moz-nativehyperlinktext;
-}
-
-.ac-title[selected=true],
-.ac-separator[selected],
-.ac-url[selected=true],
-.ac-action[selected=true] {
-  color: inherit !important;
-}
-
-.ac-tags-text[selected] > html|span.ac-tag {
-  background-color: HighlightText;
-  color: Highlight;
-}
-
-html|span.ac-emphasize-text-title,
-html|span.ac-emphasize-text-tag,
-html|span.ac-emphasize-text-url {
-  font-weight: 600;
-}
-
-.ac-type-icon[type=bookmark] {
-  list-style-image: url("chrome://browser/skin/urlbar-star.svg#star");
-}
-
-.ac-type-icon[type=bookmark][selected][current] {
-  list-style-image: url("chrome://browser/skin/urlbar-star.svg#star-inverted");
-}
-
-.autocomplete-treebody::-moz-tree-image(bookmark, treecolAutoCompleteImage) {
-  list-style-image: url("chrome://browser/skin/places/autocomplete-star.png");
-  width: 16px;
-  height: 16px;
-}
-
-.ac-type-icon[type=keyword],
-.ac-site-icon[type=searchengine],
-.autocomplete-treebody::-moz-tree-image(keyword, treecolAutoCompleteImage) {
-  list-style-image: url(chrome://global/skin/icons/autocomplete-search.svg#search-icon);
-}
-
-.ac-type-icon[type=keyword][selected],
-.ac-site-icon[type=searchengine][selected],
-.autocomplete-treebody::-moz-tree-image(keyword, treecolAutoCompleteImage, selected) {
-  list-style-image: url(chrome://global/skin/icons/autocomplete-search.svg#search-icon-inverted);
-}
-
-.autocomplete-treebody::-moz-tree-image(tag, treecolAutoCompleteImage) {
-  list-style-image: url("chrome://browser/skin/places/tag.png");
-  width: 16px;
-  height: 16px;
-}
-
-.ac-type-icon[type=switchtab],
-.ac-type-icon[type=remotetab] {
-  list-style-image: url("chrome://browser/skin/urlbar-tab.svg#tab");
-}
-
-.ac-type-icon[type=switchtab][selected],
-.ac-type-icon[type=remotetab][selected] {
-  list-style-image: url("chrome://browser/skin/urlbar-tab.svg#tab-inverted");
-}
-
-.autocomplete-treebody::-moz-tree-cell-text(treecolAutoCompleteComment) {
-  color: GrayText;
-}
-
-.autocomplete-treebody::-moz-tree-cell-text(suggesthint, treecolAutoCompleteComment),
-.autocomplete-treebody::-moz-tree-cell-text(suggestfirst, treecolAutoCompleteComment) {
-  color: GrayText;
-  font-size: smaller;
-}
-
-.autocomplete-treebody::-moz-tree-cell(suggesthint) {
-  border-top: 1px solid GrayText;
-}
-
-/* Combined go/reload/stop button in location bar */
-
-#urlbar-go-button,
-#urlbar-reload-button,
-#urlbar-stop-button {
-  -moz-appearance: none;
-  list-style-image: url("chrome://browser/skin/reload-stop-go.png");
-  padding: 0 9px;
-  margin-inline-start: 5px;
-  border-inline-start: 1px solid var(--urlbar-separator-color);
-  border-image: linear-gradient(transparent 15%,
-                                var(--urlbar-separator-color) 15%,
-                                var(--urlbar-separator-color) 85%,
-                                transparent 85%);
-  border-image-slice: 1;
-}
-
-#urlbar-reload-button {
-  -moz-image-region: rect(0, 14px, 14px, 0);
-}
-
-#urlbar-reload-button:not([disabled]):hover {
-  -moz-image-region: rect(14px, 14px, 28px, 0);
-}
-
-#urlbar-reload-button:not([disabled]):hover:active {
-  -moz-image-region: rect(28px, 14px, 42px, 0);
-}
-
-#urlbar-reload-button:-moz-locale-dir(rtl) > .toolbarbutton-icon {
-  transform: scaleX(-1);
-}
-
-#urlbar-go-button {
-  -moz-image-region: rect(0, 42px, 14px, 28px);
-}
-
-#urlbar-go-button:hover {
-  -moz-image-region: rect(14px, 42px, 28px, 28px);
-}
-
-#urlbar-go-button:hover:active {
-  -moz-image-region: rect(28px, 42px, 42px, 28px);
-}
-
-#urlbar-go-button:-moz-locale-dir(rtl) > .toolbarbutton-icon {
-  transform: scaleX(-1);
-}
-
-#urlbar-stop-button {
-  -moz-image-region: rect(0, 28px, 14px, 14px);
-}
-
-#urlbar-stop-button:not([disabled]):hover {
-  -moz-image-region: rect(14px, 28px, 28px, 14px);
-}
-
-#urlbar-stop-button:hover:active {
-  -moz-image-region: rect(28px, 28px, 42px, 14px);
-}
-
-@media (min-resolution: 1.1dppx) {
-  #urlbar-go-button,
-  #urlbar-reload-button,
-  #urlbar-stop-button {
-    list-style-image: url("chrome://browser/skin/reload-stop-go@2x.png");
-  }
-
-  #urlbar-go-button > .toolbarbutton-icon,
-  #urlbar-reload-button > .toolbarbutton-icon,
-  #urlbar-stop-button > .toolbarbutton-icon {
-    width: 14px;
-  }
-
-  #urlbar-go-button {
-    -moz-image-region: rect(0, 84px, 28px, 56px);
-  }
-
-  #urlbar-go-button:hover {
-    -moz-image-region: rect(28px, 84px, 56px, 56px);
-  }
-
-  #urlbar-go-button:hover:active {
-    -moz-image-region: rect(56px, 84px, 84px, 56px);
-  }
-
-  #urlbar-reload-button {
-    -moz-image-region: rect(0, 28px, 28px, 0);
-  }
-
-  #urlbar-reload-button:not([disabled]):hover {
-    -moz-image-region: rect(28px, 28px, 56px, 0);
-  }
-
-  #urlbar-reload-button:not([disabled]):hover:active {
-    -moz-image-region: rect(56px, 28px, 84px, 0);
-  }
-
-  #urlbar-stop-button {
-    -moz-image-region: rect(0, 56px, 28px, 28px);
-  }
-
-  #urlbar-stop-button:not([disabled]):hover {
-    -moz-image-region: rect(28px, 56px, 56px, 28px);
-  }
-
-  #urlbar-stop-button:hover:active {
-    -moz-image-region: rect(56px, 56px, 84px, 28px);
-  }
-}
-
-/* Popup blocker button */
-#page-report-button {
-  list-style-image: url("chrome://browser/skin/Info.png");
-}
-
-/* Reader mode button */
-
-#reader-mode-button {
-  list-style-image: url("chrome://browser/skin/readerMode.svg");
-  -moz-image-region: rect(0, 16px, 16px, 0);
-}
-
-#reader-mode-button:hover,
-#reader-mode-button[readeractive]:hover {
-  -moz-image-region: rect(0, 32px, 16px, 16px);
-}
-
-#reader-mode-button:hover:active,
-#reader-mode-button[readeractive] {
-  -moz-image-region: rect(0, 48px, 16px, 32px);
-}
-
-/* bookmarks menu-button */
-
-#bookmarks-menu-button[cui-areatype="toolbar"] > .toolbarbutton-menubutton-dropmarker {
-  -moz-appearance: none !important;
-  -moz-box-align: center;
-}
-
-#bookmarks-menu-button[cui-areatype="toolbar"] > .toolbarbutton-menubutton-dropmarker > .dropmarker-icon {
-  margin-top: 3px;
-  margin-bottom: 3px;
-}
-
-#bookmarks-menu-button[disabled][cui-areatype="toolbar"] > .toolbarbutton-icon,
-#bookmarks-menu-button[disabled][cui-areatype="toolbar"] > .toolbarbutton-menu-dropmarker,
-#bookmarks-menu-button[disabled][cui-areatype="toolbar"] > .toolbarbutton-menubutton-dropmarker,
-#bookmarks-menu-button[disabled][cui-areatype="toolbar"] > .toolbarbutton-menubutton-button > .toolbarbutton-icon,
-#bookmarks-menu-button[cui-areatype="toolbar"] > .toolbarbutton-menubutton-button[disabled] > .toolbarbutton-icon {
-  opacity: .4;
-}
-
-#BMB_bookmarksPopup[side="top"],
-#BMB_bookmarksPopup[side="bottom"] {
-  margin-left: -16px;
-  margin-right: -16px;
-}
-
-#BMB_bookmarksPopup[side="left"],
-#BMB_bookmarksPopup[side="right"] {
-  margin-top: -16px;
-  margin-bottom: -16px;
-}
-
-#nav-bar .toolbarbutton-1 > menupopup[side="top"].cui-widget-panel,
-#nav-bar .toolbarbutton-1 > menupopup[side="bottom"].cui-widget-panel {
-  margin-top: -4px;
-}
-
-/* Bookmarking panel */
-#editBookmarkPanelStarIcon {
-  list-style-image: url("chrome://browser/skin/places/starred48.png");
-  width: 48px;
-  height: 48px;
-}
-
-#editBookmarkPanelStarIcon[unstarred] {
-  list-style-image: url("chrome://browser/skin/places/unstarred48.png");
-}
-
-#editBookmarkPanelTitle {
-  font-size: 130%;
-}
-
-#editBookmarkPanelHeader,
-#editBookmarkPanelContent {
-  margin-bottom: .5em;
-}
-
-/* Implements editBookmarkPanel resizing on folderTree un-collapse. */
-#editBMPanel_folderTree {
-  min-width: 27em;
-}
-
-/* Content area */
-#sidebar {
-  background-color: Window;
-}
-
-#sidebar-header > .close-icon:not(:hover):-moz-lwtheme-brighttext {
-  background-image: -moz-image-rect(url("chrome://global/skin/icons/close.svg"), 0, 80, 16, 64);
-}
-
-.browserContainer > findbar {
-  background-color: -moz-dialog;
-  color: -moz-DialogText;
-  text-shadow: none;
-}
-
-/* Tabstrip */
-
-%include ../shared/tabs.inc.css
-
-#tabbrowser-tabs {
-  /* override the global style to allow the selected tab to be above the nav-bar */
-  z-index: auto;
-}
-
-#TabsToolbar {
-  min-height: 0;
-  padding: 0;
-  margin-bottom: calc(-1 * var(--tab-toolbar-navbar-overlap));
-}
-
-#TabsToolbar:not(:-moz-lwtheme) {
-  -moz-appearance: menubar;
-  color: -moz-menubartext;
-}
-
-#toolbar-menubar:not([autohide="true"]):not(:-moz-lwtheme):-moz-system-metric(menubar-drag),
-#TabsToolbar:not(:-moz-lwtheme):-moz-system-metric(menubar-drag) {
-  -moz-binding: url("chrome://browser/content/customizableui/toolbar.xml#toolbar-drag");
-}
-
-.tabbrowser-tab:focus > .tab-stack > .tab-content {
-  outline: 1px dotted;
-  outline-offset: -6px;
-}
-
-#context_reloadTab {
-  list-style-image: url("moz-icon://stock/gtk-refresh?size=menu");
-}
-
-#context_closeOtherTabs {
-  list-style-image: url("moz-icon://stock/gtk-clear?size=menu");
-}
-
-#context_closeOtherTabs[disabled] {
-  list-style-image: url("moz-icon://stock/gtk-clear?size=menu&state=disabled");
-}
-
-#context_undoCloseTab {
-  list-style-image: url("moz-icon://stock/gtk-undelete?size=menu");
-}
-
-#context_closeTab {
-  list-style-image: url("moz-icon://stock/gtk-close?size=menu");
-}
-
-/* Tab drag and drop */
-.tab-drop-indicator {
-  list-style-image: url(chrome://browser/skin/tabbrowser/tabDragIndicator.png);
-  margin-bottom: -9px;
-  z-index: 3;
-}
-
-/* Tab close button */
-.tab-close-button:not([selected]):not(:hover) {
-  background-image: -moz-image-rect(url("chrome://global/skin/icons/close.svg"), 0, 64, 16, 48);
-}
-
-.tab-close-button:not(:hover):-moz-lwtheme-brighttext,
-#TabsToolbar[brighttext] .tab-close-button:not([selected]):not(:hover) {
-  background-image: -moz-image-rect(url("chrome://global/skin/icons/close.svg"), 0, 80, 16, 64);
-}
-
-.tab-close-button:not(:hover):-moz-lwtheme-darktext {
-  background-image: -moz-image-rect(url("chrome://global/skin/icons/close.svg"), 0, 96, 16, 80);
-}
-
-/* Tabstrip new tab button */
-.tabs-newtab-button,
-#TabsToolbar > #new-tab-button ,
-#TabsToolbar > toolbarpaletteitem > #new-tab-button {
-  list-style-image: url(chrome://browser/skin/tabbrowser/newtab.svg);
-  -moz-image-region: auto;
-}
-
-#TabsToolbar[brighttext] .tabs-newtab-button,
-#TabsToolbar[brighttext] > #new-tab-button,
-#TabsToolbar[brighttext] > toolbarpaletteitem > #new-tab-button {
-  list-style-image: url(chrome://browser/skin/tabbrowser/newtab-inverted.svg);
-}
-
-/* Tabbrowser arrowscrollbox arrows */
-.tabbrowser-arrowscrollbox > .scrollbutton-up > .toolbarbutton-icon,
-.tabbrowser-arrowscrollbox > .scrollbutton-down > .toolbarbutton-icon {
-  -moz-appearance: none;
-}
-
-.tabbrowser-arrowscrollbox > .scrollbutton-up,
-.tabbrowser-arrowscrollbox > .scrollbutton-down {
-  -moz-appearance: none;
-  list-style-image: url("chrome://browser/skin/tabbrowser/tab-arrow-left.png");
-  margin: 0 0 var(--tab-toolbar-navbar-overlap);
-}
-
-#TabsToolbar[brighttext] > #tabbrowser-tabs > .tabbrowser-arrowscrollbox > .scrollbutton-up,
-#TabsToolbar[brighttext] > #tabbrowser-tabs > .tabbrowser-arrowscrollbox > .scrollbutton-down {
-  list-style-image: url(chrome://browser/skin/tabbrowser/tab-arrow-left-inverted.png);
-}
-
-.tabbrowser-arrowscrollbox > .scrollbutton-up[disabled],
-.tabbrowser-arrowscrollbox > .scrollbutton-down[disabled] {
-  opacity: .4;
-}
-
-.tabbrowser-arrowscrollbox > .scrollbutton-up:-moz-locale-dir(rtl),
-.tabbrowser-arrowscrollbox > .scrollbutton-down:-moz-locale-dir(ltr) {
-  transform: scaleX(-1);
-}
-
-.tabbrowser-arrowscrollbox > .scrollbutton-down {
-  transition: 1s background-color ease-out;
-}
-
-.tabbrowser-arrowscrollbox > .scrollbutton-down[notifybgtab] {
-  background-color: Highlight;
-  transition: none;
-}
-
-#TabsToolbar .toolbarbutton-1 {
-  margin-bottom: var(--tab-toolbar-navbar-overlap);
-}
-
-#alltabs-button {
-  list-style-image: url("chrome://browser/skin/tabbrowser/alltabs.png");
-}
-
-#TabsToolbar[brighttext] > #alltabs-button,
-#TabsToolbar[brighttext] > toolbarpaletteitem > #alltabs-button {
-  list-style-image: url("chrome://browser/skin/tabbrowser/alltabs-inverted.png");
-}
-
-#alltabs-button > .toolbarbutton-icon {
-  padding: 9px 6px 6px;
-}
-
-#alltabs-button > .toolbarbutton-menu-dropmarker {
-  display: none;
-}
-
-/* All tabs menupopup */
-.alltabs-item > .menu-iconic-left > .menu-iconic-icon {
-  list-style-image: url("chrome://mozapps/skin/places/defaultFavicon.png");
-}
-
-.alltabs-item[selected="true"] {
-  font-weight: bold;
-}
-
-.alltabs-item[busy] > .menu-iconic-left > .menu-iconic-icon {
-  list-style-image: url("chrome://global/skin/icons/loading.png");
-}
-
-/* Sidebar */
-#sidebar-throbber[loading="true"] {
-  list-style-image: url("chrome://global/skin/icons/loading.png");
-  margin-inline-end: 4px;
-}
-
-toolbarbutton.chevron {
-  list-style-image: url("chrome://global/skin/toolbar/chevron.gif") !important;
-}
-
-toolbar[brighttext] toolbarbutton.chevron {
-  list-style-image: url("chrome://global/skin/toolbar/chevron-inverted.png") !important;
-}
-
-toolbarbutton.chevron:-moz-locale-dir(rtl) > .toolbarbutton-icon {
-  transform: scaleX(-1);
-}
-
-toolbarbutton.chevron > .toolbarbutton-text,
-toolbarbutton.chevron > .toolbarbutton-menu-dropmarker {
-  display: none;
-}
-
-toolbarbutton.chevron > .toolbarbutton-icon {
-  margin: 0;
-}
-
-/* Status panel */
-
-.statuspanel-label {
-  margin: 0;
-  padding: 2px 4px;
-  background: -moz-dialog;
-  border: 1px none ThreeDShadow;
-  border-top-style: solid;
-  color: -moz-dialogText;
-  text-shadow: none;
-}
-
-.statuspanel-label:-moz-locale-dir(ltr):not([mirror]),
-.statuspanel-label:-moz-locale-dir(rtl)[mirror] {
-  border-right-style: solid;
-  border-top-right-radius: .3em;
-  margin-right: 1em;
-}
-
-.statuspanel-label:-moz-locale-dir(rtl):not([mirror]),
-.statuspanel-label:-moz-locale-dir(ltr)[mirror] {
-  border-left-style: solid;
-  border-top-left-radius: .3em;
-  margin-left: 1em;
-}
-
-%include ../shared/fullscreen/warning.inc.css
-%include ../shared/ctrlTab.inc.css
-%include ../../../devtools/client/themes/responsivedesign.inc.css
-%include ../../../devtools/client/themes/commandline.inc.css
-%include ../shared/plugin-doorhanger.inc.css
-
-notification.pluginVulnerable > .notification-inner > .messageCloseButton:not(:hover) {
-  background-image: -moz-image-rect(url("chrome://global/skin/icons/close.svg"), 0, 80, 16, 64);
-}
-
-
-%include downloads/indicator.css
-
-.gcli-panel {
-  padding: 0;
-}
-
-.gclitoolbar-input-node > .textbox-input-box > html|*.textbox-input::-moz-selection {
-  color: hsl(210,11%,16%);
-}
-
-/* Error counter */
-
-#developer-toolbar-toolbox-button[error-count]:before {
-  color: #FDF3DE;
-  min-width: 16px;
-  text-shadow: none;
-  background-image: linear-gradient(#B4211B, #8A1915);
-  border-radius: 1px;
-  margin-inline-end: 2px;
-}
-
-/* Customization mode */
-
-%include ../shared/customizableui/customizeMode.inc.css
-
-#main-window[customize-entered] > #tab-view-deck {
-  background-image: url("chrome://browser/skin/customizableui/customizeMode-gridTexture.png"),
-                    linear-gradient(to bottom, #bcbcbc, #b5b5b5);
-  background-attachment: fixed;
-}
-
-#main-window[customization-lwtheme] > #tab-view-deck:-moz-lwtheme {
-  background-repeat: no-repeat;
-  background-position: right top;
-  background-attachment: fixed;
-  /* The image will get set from CustomizeMode.jsm */
-  background-image: none;
-  background-color: transparent;
-}
-
-#main-window[customization-lwtheme]:-moz-lwtheme {
-  background-image: url("chrome://browser/skin/customizableui/customizeMode-gridTexture.png"),
-                    url("chrome://browser/skin/customizableui/background-noise-toolbar.png"),
-                    linear-gradient(to bottom, #bcbcbc, #b5b5b5);
-  background-color: #b5b5b5;
-  background-repeat: repeat;
-  background-attachment: fixed;
-  background-position: left top;
-}
-
-#main-window[customize-entered] #browser-bottombox,
-#main-window[customize-entered] #navigator-toolbox > toolbar:not(#toolbar-menubar):not(#TabsToolbar),
-#main-window[customize-entered] #customization-container {
-  border: 3px solid hsla(0,0%,0%,.1);
-  border-top-width: 0;
-  background-clip: padding-box;
-  background-origin: padding-box;
-  -moz-border-right-colors: hsla(0,0%,0%,.05) hsla(0,0%,0%,.1) hsla(0,0%,0%,.2);
-  -moz-border-bottom-colors: hsla(0,0%,0%,.05) hsla(0,0%,0%,.1) hsla(0,0%,0%,.2);
-  -moz-border-left-colors: hsla(0,0%,0%,.05) hsla(0,0%,0%,.1) hsla(0,0%,0%,.2);
-}
-
-#main-window[customize-entered] #customization-container,
-#main-window[customize-entered] #navigator-toolbox > toolbar:not(#toolbar-menubar):not(#TabsToolbar) {
-  border-bottom-width: 0;
-}
-
-#main-window[customize-entered] #TabsToolbar {
-  -moz-appearance: none;
-  background-clip: padding-box;
-  border-right: 3px solid transparent;
-  border-left: 3px solid transparent;
-}
-
-/* End customization mode */
-
-
-#main-window[privatebrowsingmode=temporary] #private-browsing-indicator {
-  background: url("chrome://browser/skin/privatebrowsing-mask.png") center no-repeat;
-  width: 40px;
-}
-
-%include ../shared/contextmenu.inc.css
-
-#context-navigation > .menuitem-iconic > .menu-iconic-left {
-  /* override toolkit/themes/linux/global/menu.css */
-  padding-inline-end: 0 !important;
-  margin-inline-end: 0 !important;
-}
-
-.browser-extension-panel > .panel-arrowcontainer > .panel-arrowcontent {
-  padding: 0;
-  overflow: hidden;
-}
-
-.webextension-popup-browser {
-  border-radius: inherit;
-}
diff --git a/browser/themes/linux/click-to-play-warning-stripes.png b/browser/themes/linux/click-to-play-warning-stripes.png
deleted file mode 100644
index 29f15f7b8..000000000
--- a/browser/themes/linux/click-to-play-warning-stripes.png
+++ /dev/null
diff --git a/browser/themes/linux/communicator/communicator.css b/browser/themes/linux/communicator/communicator.css
deleted file mode 100644
index 0b57574fd..000000000
--- a/browser/themes/linux/communicator/communicator.css
+++ /dev/null
@@ -1,6 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-@import url("chrome://global/skin/");
-
diff --git a/browser/themes/linux/communicator/jar.mn b/browser/themes/linux/communicator/jar.mn
deleted file mode 100644
index dfd20c523..000000000
--- a/browser/themes/linux/communicator/jar.mn
+++ /dev/null
@@ -1,7 +0,0 @@
-# This Source Code Form is subject to the terms of the Mozilla Public
-# License, v. 2.0. If a copy of the MPL was not distributed with this
-# file, You can obtain one at http://mozilla.org/MPL/2.0/.
-
-browser.jar:
-% skin communicator classic/1.0 %skin/classic/communicator/
-        skin/classic/communicator/communicator.css
diff --git a/browser/themes/linux/communicator/moz.build b/browser/themes/linux/communicator/moz.build
deleted file mode 100644
index eb4454d28..000000000
--- a/browser/themes/linux/communicator/moz.build
+++ /dev/null
@@ -1,7 +0,0 @@
-# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
-# vim: set filetype=python:
-# This Source Code Form is subject to the terms of the Mozilla Public
-# License, v. 2.0. If a copy of the MPL was not distributed with this
-# file, You can obtain one at http://mozilla.org/MPL/2.0/.
-
-JAR_MANIFESTS += ['jar.mn']
\ No newline at end of file
diff --git a/browser/themes/linux/controlcenter/panel.css b/browser/themes/linux/controlcenter/panel.css
deleted file mode 100644
index fab9aa3a4..000000000
--- a/browser/themes/linux/controlcenter/panel.css
+++ /dev/null
@@ -1,13 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-%include ../../shared/controlcenter/panel.inc.css
-
-.identity-popup-expander:-moz-focusring {
-  padding: 1px;
-}
-
-.identity-popup-expander:-moz-focusring > .button-box {
-  outline: 1px -moz-dialogtext dotted;
-}
diff --git a/browser/themes/linux/customizableui/background-noise-toolbar.png b/browser/themes/linux/customizableui/background-noise-toolbar.png
deleted file mode 100644
index d09ba9daf..000000000
--- a/browser/themes/linux/customizableui/background-noise-toolbar.png
+++ /dev/null
diff --git a/browser/themes/linux/customizableui/customizeMode-gridTexture.png b/browser/themes/linux/customizableui/customizeMode-gridTexture.png
deleted file mode 100644
index a7c2775cf..000000000
--- a/browser/themes/linux/customizableui/customizeMode-gridTexture.png
+++ /dev/null
diff --git a/browser/themes/linux/customizableui/customizeMode-separatorHorizontal.png b/browser/themes/linux/customizableui/customizeMode-separatorHorizontal.png
deleted file mode 100644
index 5e17cb4db..000000000
--- a/browser/themes/linux/customizableui/customizeMode-separatorHorizontal.png
+++ /dev/null
diff --git a/browser/themes/linux/customizableui/customizeMode-separatorVertical.png b/browser/themes/linux/customizableui/customizeMode-separatorVertical.png
deleted file mode 100644
index dc4caee81..000000000
--- a/browser/themes/linux/customizableui/customizeMode-separatorVertical.png
+++ /dev/null
diff --git a/browser/themes/linux/customizableui/panelUI.css b/browser/themes/linux/customizableui/panelUI.css
deleted file mode 100644
index 0037b5634..000000000
--- a/browser/themes/linux/customizableui/panelUI.css
+++ /dev/null
@@ -1,90 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-%include ../../shared/customizableui/panelUI.inc.css
-
-.panel-subviews {
-  background-color: var(--arrowpanel-background);
-}
-
-#BMB_bookmarksPopup > menuitem[type="checkbox"] {
-  -moz-appearance: none !important; /* important, to override toolkit rule */
-}
-
-#BMB_bookmarksPopup menupopup {
-  -moz-appearance: none;
-  background: var(--arrowpanel-background);
-  color: var(--arrowpanel-color);
-  border: 1px solid var(--arrowpanel-border-color);
-  margin-top: -6px;
-  padding-top: 1px;
-}
-
-/* Add some space at the top because there are no headers: */
-#BMB_bookmarksPopup menupopup > hbox > .popup-internal-box > .arrowscrollbox-scrollbox > .scrollbox-innerbox  {
-  padding-top: 4px;
-}
-
-.subviewbutton > .toolbarbutton-text {
-  padding-top: 3px;
-  padding-bottom: 3px;
-}
-
-.widget-overflow-list .toolbarbutton-1 > .toolbarbutton-menubutton-button {
-  -moz-appearance: none;
-  border: 0;
-  margin-inline-start: 3px;
-}
-
-.widget-overflow-list .toolbarbutton-1 > .toolbarbutton-menubutton-dropmarker {
-  margin-inline-start: 0;
-}
-
-.subviewbutton > .toolbarbutton-text {
-  padding-inline-start: 16px;
-}
-
-.subviewbutton:-moz-any([image],[targetURI],.cui-withicon, .restoreallitem, .bookmark-item) > .toolbarbutton-text {
-  padding-inline-start: 0;
-}
-
-.subviewbutton:-moz-any([image],[targetURI],.cui-withicon, .restoreallitem, .bookmark-item)[checked="true"] > .toolbarbutton-icon {
-  visibility: hidden;
-}
-
-menuitem.subviewbutton {
-  -moz-appearance: none !important;
-}
-
-menu.subviewbutton > .menu-right {
-  -moz-appearance: none;
-  list-style-image: url(chrome://browser/skin/places/bookmarks-menu-arrow.png);
-  -moz-image-region: rect(0, 16px, 16px, 0);
-  width: 16px;
-  height: 16px;
-}
-
-menu[disabled="true"].subviewbutton > .menu-right {
-  -moz-image-region: rect(0, 32px, 16px, 16px);
-}
-
-menu.subviewbutton > .menu-right:-moz-locale-dir(rtl) {
-  transform: scaleX(-1);
-}
-
-.subviewbutton > .toolbarbutton-icon {
-  margin-inline-end: 5px !important;
-}
-
-.subviewbutton > .menu-right,
-.subviewbutton > .menu-iconic-left {
-  padding-top: 1px;
-  /* These need !important to override menu.css */
-  margin-top: 1px !important;
-  margin-bottom: 2px !important;
-}
-
-.subviewradio > .radio-label-box {
-  -moz-appearance: none;
-}
diff --git a/browser/themes/linux/devedition.css b/browser/themes/linux/devedition.css
deleted file mode 100644
index 1f16d5d63..000000000
--- a/browser/themes/linux/devedition.css
+++ /dev/null
@@ -1,106 +0,0 @@
-% This Source Code Form is subject to the terms of the Mozilla Public
-% License, v. 2.0. If a copy of the MPL was not distributed with this
-% file, You can obtain one at http://mozilla.org/MPL/2.0/.
-
-%include ../shared/devedition.inc.css
-
-:root {
-  --forwardbutton-width: 29px;
-}
-
-:root[devtoolstheme="light"] {
-  --urlbar-dropmarker-url: url("chrome://browser/skin/devedition/urlbar-history-dropmarker.svg");
-  --urlbar-dropmarker-region: rect(0px, 11px, 14px, 0px);
-  --urlbar-dropmarker-hover-region: rect(0, 22px, 14px, 11px);
-  --urlbar-dropmarker-active-region: rect(0px, 33px, 14px, 22px);
-  --urlbar-dropmarker-2x-url: url("chrome://browser/skin/devedition/urlbar-history-dropmarker.svg");
-  --urlbar-dropmarker-2x-region: rect(0px, 11px, 14px, 0px);
-  --urlbar-dropmarker-hover-2x-region: rect(0, 22px, 14px, 11px);
-  --urlbar-dropmarker-active-2x-region: rect(0px, 33px, 14px, 22px);
-}
-
-:root[devtoolstheme="dark"] .findbar-closebutton:not(:hover),
-:root[devtoolstheme="dark"] #sidebar-header > .close-icon:not(:hover),
-.tab-close-button[selected]:not(:hover) {
-  background-image: -moz-image-rect(url("chrome://global/skin/icons/close.svg"), 0, 80, 16, 64);
-}
-
-/* The menubar and tabs toolbar should match the devedition theme */
-#TabsToolbar,
-#toolbar-menubar {
-  -moz-appearance: none !important;
-}
-#main-menubar {
-  color: var(--chrome-color);
-}
-#main-menubar > menu:not([open]) {
-  color: inherit;
-}
-
-/* Allow buttons with -moz-appearance set to look normal on hover and open states */
-#navigator-toolbox .toolbarbutton-1:-moz-any(:hover, [open="true"]),
-#PlacesToolbar toolbarbutton.bookmark-item:-moz-any(:hover, [open="true"]) {
-  color: initial;
-}
-
-/* Square back and forward buttons */
-#back-button > .toolbarbutton-icon,
-#forward-button > .toolbarbutton-icon {
-  margin: 0;
-  border: 1px solid var(--chrome-nav-bar-controls-border-color);
-  padding: 2px 5px;
-  background: var(--chrome-nav-buttons-background);
-  box-shadow: none !important;
-}
-
-#forward-button > .toolbarbutton-icon {
-  border-inline-start: none;
-}
-
-/* Override a box shadow for disabled back button */
-#main-window:not([customizing]) #back-button[disabled] > .toolbarbutton-icon {
-  box-shadow: none !important;
-}
-
-#back-button:hover:not([disabled="true"]) > .toolbarbutton-icon,
-#forward-button:hover:not([disabled="true"]) > .toolbarbutton-icon {
-  background: var(--chrome-nav-buttons-hover-background) !important;
-}
-
-#back-button > .toolbarbutton-icon {
-  border-radius: 2px 0 0 2px !important;
-}
-
-.urlbar-history-dropmarker {
-  -moz-appearance: none;
-  padding: 0 3px;
-  list-style-image: var(--urlbar-dropmarker-url);
-  -moz-image-region: var(--urlbar-dropmarker-region);
-}
-
-/* Add the proper background for tab overflow */
-#alltabs-button,
-#new-tab-button {
-  background: var(--chrome-background-color);
-}
-
-#new-tab-button:hover > .toolbarbutton-icon {
-  border-color: transparent !important;
-}
-
-/* Prevent double border below tabs toolbar */
-#TabsToolbar:not([collapsed="true"]) + #nav-bar {
-  border-top-width: 0 !important;
-}
-
-/* Fix the bad-looking text-shadow in the sidebar header: */
-.sidebar-header,
-#sidebar-header {
-  text-shadow: none;
-}
-
-.ac-type-icon {
-  /* Left-align the type icon in awesomebar popup results with the icon in the
-     urlbar. */
-  margin-inline-start: 11px;
-}
diff --git a/browser/themes/linux/downloads/allDownloadsViewOverlay.css b/browser/themes/linux/downloads/allDownloadsViewOverlay.css
deleted file mode 100644
index f5a05c9b0..000000000
--- a/browser/themes/linux/downloads/allDownloadsViewOverlay.css
+++ /dev/null
@@ -1,11 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-%include ../../shared/downloads/allDownloadsViewOverlay.inc.css
-
-/*** List items ***/
-
-:root {
-  --downloads-item-height: 5em;
-}
diff --git a/browser/themes/linux/downloads/download-glow-menuPanel.png b/browser/themes/linux/downloads/download-glow-menuPanel.png
deleted file mode 100644
index b8443f045..000000000
--- a/browser/themes/linux/downloads/download-glow-menuPanel.png
+++ /dev/null
diff --git a/browser/themes/linux/downloads/download-notification-finish.png b/browser/themes/linux/downloads/download-notification-finish.png
deleted file mode 100644
index f5fa12053..000000000
--- a/browser/themes/linux/downloads/download-notification-finish.png
+++ /dev/null
diff --git a/browser/themes/linux/downloads/download-notification-start.png b/browser/themes/linux/downloads/download-notification-start.png
deleted file mode 100644
index bd548b183..000000000
--- a/browser/themes/linux/downloads/download-notification-start.png
+++ /dev/null
diff --git a/browser/themes/linux/downloads/downloads.css b/browser/themes/linux/downloads/downloads.css
deleted file mode 100644
index 41ea68d43..000000000
--- a/browser/themes/linux/downloads/downloads.css
+++ /dev/null
@@ -1,21 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-%include ../../shared/downloads/downloads.inc.css
-
-/*** List items and similar elements in the summary ***/
-
-:root {
-  --downloads-item-height: 5.5em;
-  --downloads-item-font-size-factor: 0.9;
-  --downloads-item-details-opacity: 0.6;
-}
-
-@keyfocus@ @itemFocused@,
-@keyfocus@ #downloadsSummary:focus,
-@keyfocus@ .downloadsPanelFooterButton:focus,
-.downloadButton:focus {
-  outline: 1px -moz-dialogtext dotted;
-  outline-offset: -1px;
-}
diff --git a/browser/themes/linux/downloads/indicator.css b/browser/themes/linux/downloads/indicator.css
deleted file mode 100644
index 6e9d9ace5..000000000
--- a/browser/themes/linux/downloads/indicator.css
+++ /dev/null
@@ -1,218 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-/*** Status and progress indicator ***/
-
-#downloads-animation-container {
-  min-height: 1px;
-  min-width: 1px;
-  height: 1px;
-  margin-bottom: -1px;
-  /* Makes the outermost animation container element positioned, so that its
-     contents are rendered over the main browser window in the Z order.
-     This is required by the animated event notification. */
-  position: relative;
-  /* The selected tab may overlap #downloads-indicator-notification */
-  z-index: 5;
-}
-
-/*** Main indicator icon ***/
-
-@media not all and (min-resolution: 1.1dppx) {
-  #downloads-button {
-    --downloads-indicator-icon: -moz-image-rect(url("chrome://browser/skin/Toolbar.png"), 0, 198, 18, 180);
-    --downloads-indicator-icon-attention: -moz-image-rect(url("chrome://browser/skin/Toolbar.png"), 18, 198, 36, 180);
-    --downloads-indicator-icon-inverted: -moz-image-rect(url("chrome://browser/skin/Toolbar-inverted.png"), 0, 198, 18, 180);
-    --downloads-indicator-icon-attention-inverted: -moz-image-rect(url("chrome://browser/skin/Toolbar-inverted.png"), 18, 198, 36, 180);
-  }
-}
-
-@media (min-resolution: 1.1dppx) {
-  #downloads-button {
-    --downloads-indicator-icon: -moz-image-rect(url("chrome://browser/skin/Toolbar@2x.png"), 0, 396, 36, 360);
-    --downloads-indicator-icon-attention: -moz-image-rect(url("chrome://browser/skin/Toolbar@2x.png"), 36, 396, 72, 360);
-    --downloads-indicator-icon-inverted: -moz-image-rect(url("chrome://browser/skin/Toolbar-inverted@2x.png"), 0, 396, 36, 360);
-    --downloads-indicator-icon-attention-inverted: -moz-image-rect(url("chrome://browser/skin/Toolbar-inverted@2x.png"), 36, 396, 72, 360);
-  }
-}
-
-#downloads-button[cui-areatype="toolbar"] > #downloads-indicator-anchor > #downloads-indicator-icon {
-  background: var(--downloads-indicator-icon) center no-repeat;
-  width: 18px;
-  height: 18px;
-  background-size: 18px;
-}
-
-toolbar[brighttext] #downloads-button[cui-areatype="toolbar"]:not([attention="success"]) > #downloads-indicator-anchor > #downloads-indicator-icon {
-  background-image: var(--downloads-indicator-icon-inverted);
-}
-
-#downloads-button[attention="warning"] > .toolbarbutton-badge-stack > .toolbarbutton-badge,
-#downloads-button[attention="severe"] > .toolbarbutton-badge-stack > .toolbarbutton-badge {
-  display: -moz-box;
-  height: 8px;
-  width: 8px;
-  min-width: 0;
-  border-radius: 50%;
-  /* "!important" is necessary to override the rule in toolbarbutton.css */
-  margin-top: -1px !important;
-  margin-right: -2px !important;
-}
-
-#downloads-button[cui-areatype="toolbar"] > .toolbarbutton-badge-stack > .toolbarbutton-badge {
-  height: 7px;
-  width: 7px;
-}
-
-#downloads-button[attention="severe"] > .toolbarbutton-badge-stack > .toolbarbutton-badge {
-  background: #D90000;
-}
-
-#downloads-button[attention="warning"] > .toolbarbutton-badge-stack > .toolbarbutton-badge {
-  background: #FFBF00;
-}
-
-#downloads-button[cui-areatype="toolbar"][attention="severe"] > .toolbarbutton-badge-stack > .toolbarbutton-badge:-moz-window-inactive,
-#downloads-button[cui-areatype="toolbar"][attention="warning"] > .toolbarbutton-badge-stack > .toolbarbutton-badge:-moz-window-inactive {
-  filter: none;
-}
-
-#downloads-button[cui-areatype="toolbar"][attention="success"] > #downloads-indicator-anchor > #downloads-indicator-icon {
-  background-image: var(--downloads-indicator-icon-attention);
-}
-
-toolbar[brighttext] #downloads-button[cui-areatype="toolbar"][attention="success"] > #downloads-indicator-anchor > #downloads-indicator-icon {
-  background-image: var(--downloads-indicator-icon-attention-inverted);
-}
-
-#downloads-button[cui-areatype="menu-panel"][attention="success"] {
-  list-style-image: url("chrome://browser/skin/downloads/download-glow-menuPanel.png");
-  -moz-image-region: auto;
-}
-
-/* In the next few rules, we use :not([counter]) as a shortcut that is
-   equivalent to -moz-any([progress], [paused]). */
-
-#downloads-button:not([counter]) > #downloads-indicator-anchor > #downloads-indicator-progress-area > #downloads-indicator-counter {
-  background: var(--downloads-indicator-icon) center no-repeat;
-  background-size: 12px;
-}
-
-toolbar[brighttext] #downloads-button:not([counter]):not([attention="success"]) > #downloads-indicator-anchor > #downloads-button-progress-area > #downloads-indicator-counter {
-  background-image: var(--downloads-indicator-icon-inverted);
-}
-
-#downloads-button:not([counter])[attention="success"] > #downloads-indicator-anchor > #downloads-indicator-progress-area > #downloads-indicator-counter {
-  background-image: var(--downloads-indicator-icon-attention);
-}
-
-toolbar[brighttext] #downloads-button:not([counter])[attention="success"] > #downloads-indicator-anchor > #downloads-indicator-progress-area > #downloads-indicator-counter {
-  background-image: var(--downloads-indicator-icon-attention-inverted);
-}
-
-/*** Download notifications ***/
-
-#downloads-indicator-notification {
-  opacity: 0;
-  background-size: 16px;
-  background-position: center;
-  background-repeat: no-repeat;
-  width: 16px;
-  height: 16px;
-}
-
-@keyframes downloadsIndicatorNotificationStartRight {
-  from { opacity: 0; transform: translate(-128px, 128px) scale(8); }
-  20%  { opacity: .85; animation-timing-function: ease-out; }
-  to   { opacity: 0; transform: translate(0) scale(1); }
-}
-
-@keyframes downloadsIndicatorNotificationStartLeft {
-  from { opacity: 0; transform: translate(128px, 128px) scale(8); }
-  20%  { opacity: .85; animation-timing-function: ease-out; }
-  to   { opacity: 0; transform: translate(0) scale(1); }
-}
-
-#downloads-notification-anchor[notification="start"] > #downloads-indicator-notification {
-  background-image: url("chrome://browser/skin/downloads/download-notification-start.png");
-  animation-name: downloadsIndicatorNotificationStartRight;
-  animation-duration: 1s;
-}
-
-#downloads-notification-anchor[notification="start"]:-moz-locale-dir(rtl) > #downloads-indicator-notification {
-  animation-name: downloadsIndicatorNotificationStartLeft;
-}
-
-@keyframes downloadsIndicatorNotificationFinish {
-  from { opacity: 0; transform: scale(1); }
-  20%  { opacity: .65; animation-timing-function: ease-in; }
-  to   { opacity: 0; transform: scale(8); }
-}
-
-#downloads-notification-anchor[notification="finish"] > #downloads-indicator-notification {
-  background-image: url("chrome://browser/skin/downloads/download-notification-finish.png");
-  animation-name: downloadsIndicatorNotificationFinish;
-  animation-duration: 1s;
-}
-
-/*** Progress bar and text ***/
-
-#downloads-indicator-counter {
-  height: 10px;
-  margin: 0;
-  color: hsl(0,0%,30%);
-  text-shadow: 0 1px 0 hsla(0,0%,100%,.5);
-  font-size: 10px;
-  line-height: 10px;
-  text-align: center;
-}
-
-toolbar[brighttext] #downloads-indicator-counter {
-  color: white;
-  text-shadow: 0 0 1px rgba(0,0,0,.7),
-               0 1px 1.5px rgba(0,0,0,.5);
-}
-
-#downloads-indicator-progress {
-  width: 18px;
-  height: 6px;
-  min-width: 0;
-  min-height: 0;
-  margin-top: 1px;
-  margin-bottom: 2px;
-  border-radius: 2px;
-  box-shadow: 0 1px 0 hsla(0,0%,100%,.4);
-}
-
-#downloads-indicator-progress > .progress-bar {
-  -moz-appearance: none;
-  min-width: 0;
-  min-height: 0;
-  /* The background-clip: border-box; and background-image: none; are there to expand the background-color behind the border */
-  background-clip: padding-box, border-box;
-  background-color: rgb(255, 135, 94);
-  background-image: linear-gradient(transparent 1px, rgba(255, 255, 255, 0.4) 1px, rgba(255, 255, 255, 0.4) 2px, transparent 2px), none;
-  border: 1px solid;
-  border-color: rgba(0,43,86,.6) rgba(0,43,86,.4) rgba(0,43,86,.4);
-  border-radius: 2px 0 0 2px;
-}
-
-#downloads-indicator-progress > .progress-remainder {
-  -moz-appearance: none;
-  min-width: 0;
-  min-height: 0;
-  background-image: linear-gradient(#505050, #575757);
-  border: 1px solid;
-  border-color: hsla(0,0%,0%,.6) hsla(0,0%,0%,.4) hsla(0,0%,0%,.4);
-  border-inline-start: none;
-  border-radius: 0 2px 2px 0;
-}
-
-#downloads-button[paused] > #downloads-indicator-anchor > #downloads-indicator-progress-area > #downloads-indicator-progress > .progress-bar {
-  background-color: rgb(220, 230, 81);
-}
-
-#downloads-button[paused] > #downloads-indicator-anchor > #downloads-indicator-progress-area > #downloads-indicator-progress > .progress-remainder {
-  background-image: linear-gradient(#4b5000, #515700);
-}
diff --git a/browser/themes/linux/feeds/feedIcon.png b/browser/themes/linux/feeds/feedIcon.png
deleted file mode 100644
index a788fffb0..000000000
--- a/browser/themes/linux/feeds/feedIcon.png
+++ /dev/null
diff --git a/browser/themes/linux/feeds/feedIcon16.png b/browser/themes/linux/feeds/feedIcon16.png
deleted file mode 100644
index f8536a4e1..000000000
--- a/browser/themes/linux/feeds/feedIcon16.png
+++ /dev/null
diff --git a/browser/themes/linux/feeds/subscribe-ui.css b/browser/themes/linux/feeds/subscribe-ui.css
deleted file mode 100644
index f1650036e..000000000
--- a/browser/themes/linux/feeds/subscribe-ui.css
+++ /dev/null
@@ -1,7 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-.alwaysUse {
-  padding: 5px;
-}
diff --git a/browser/themes/linux/feeds/subscribe.css b/browser/themes/linux/feeds/subscribe.css
deleted file mode 100644
index a9b59d2e1..000000000
--- a/browser/themes/linux/feeds/subscribe.css
+++ /dev/null
@@ -1,185 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-html {
-  background: -moz-Dialog;
-  font: 3mm tahoma,arial,helvetica,sans-serif;
-}
-
-#subscribeUsingDescription,
-#subscribeButton {
-  display: block;
-}
-
-#subscribeUsingDescription {
-  margin-bottom: 0.5em;
-}
-
-#subscribeButton {
-  margin-top: 0.5em;
-  margin-inline-start: auto;
-}
-
-#feedBody {
-  border: 1px solid THreeDShadow;
-  padding: 3em;
-  padding-inline-start: 30px;
-  margin: 2em auto;
-  background: -moz-Field;
-}
-
-#feedHeaderContainer {
-  border: 1px solid ThreeDShadow;
-  border-radius: 10px;
-  margin: -4em auto 0 auto;
-  background-color: InfoBackground;
-  -moz-appearance: -moz-gtk-info-bar;
-  display: flex;
-}
-
-#feedHeaderContainerSpacer {
-  flex-grow: 1;
-}
-
-#feedHeader {
-  margin-top: 4.9em;
-  margin-bottom: 1em;
-  margin-inline-start: 1.4em;
-  margin-inline-end: 1em;
-  padding-inline-start: 2.9em;
-  font-size: 110%;
-  color: -moz-gtk-info-bar-text;
-}
-
-.feedBackground {
-  background: url("chrome://browser/skin/feeds/feedIcon.png") 0% 10% no-repeat;
-}
-
-.videoPodcastBackground {
-  background: url("chrome://browser/skin/feeds/videoFeedIcon.png") 0% 10% no-repeat;
-}
-
-.audioPodcastBackground {
-  background: url("chrome://browser/skin/feeds/audioFeedIcon.png") 0% 10% no-repeat;
-}
-
-#feedHeader[dir="rtl"] {
-  background-position: 100% 10%;
-}
-
-#feedIntroText {
-  display: none;
-}
-
-#feedHeader[firstrun="true"] #feedIntroText {
-  padding-top: 0.1em;
-  padding-inline-start: 0.6em;
-  display: block;
-}
-
-#feedHeader[firstrun="true"] > #feedSubscribeLine {
-  padding-inline-start: 1.8em;
-}
-
-#feedSubscribeLine {
-  padding-top: 0.2em;
-  padding-inline-start: 0.5em;
-}
-
-/* Don't print subscription UI */
-@media print {
-  #feedHeaderContainer {
-    display: none;
-  }
-}
-
-body {
-  margin: 0;
-  padding: 0 3em;
-  color: -moz-fieldText;
-  font: message-box;
-}
-
-h1 {
-  font-size: 160%;
-  border-bottom: 2px solid ThreeDLightShadow;
-  margin: 0 0 .2em 0;
-}
-
-h2 {
-  color: GrayText;
-  font-size: 110%;
-  font-weight: normal;
-  margin: 0 0 .6em 0;
-}
-
-#feedTitleLink {
-  float: right;
-  margin-inline-start: .6em;
-  margin-inline-end: 0;
-  margin-top: 0;
-  margin-bottom: 0;
-}
-
-a[href] img {
-  border: none;
-}
-
-#feedTitleContainer {
-  margin-inline-start: 0;
-  margin-inline-end: .6em;
-  margin-top: 0;
-  margin-bottom: 0;
-}
-
-#feedTitleImage {
-  margin-inline-start: .6em;
-  margin-inline-end: 0;
-  margin-top: 0;
-  margin-bottom: 0;
-  max-width: 300px;
-  max-height: 150px;
-}
-
-.feedEntryContent {
-  font-size: 110%;
-}
- 
-.link {
-  color: #0000FF;
-  text-decoration: underline;
-  cursor: pointer;
-}
-
-.link:hover:active {
-  color: #FF0000;
-}
-
-.lastUpdated {
-  font-size: 85%;
-  font-weight: normal;
-}
-
-.type-icon {
-  vertical-align: bottom;
-  height: 16px;
-  width: 16px;
-}
-
-.enclosures {
-  border: 1px solid THreeDShadow;
-  padding: 1em;
-  margin: 1em auto;
-  background: -moz-Dialog;
-}
-
-.enclosure {
-  vertical-align: middle;
-  margin-left: 2px;
-}
-
-.handlersMenuList > .menulist-label-box > .menulist-icon {
-  max-width: 16px;
-  max-height: 16px;
-}
diff --git a/browser/themes/linux/jar.mn b/browser/themes/linux/jar.mn
deleted file mode 100644
index 189027812..000000000
--- a/browser/themes/linux/jar.mn
+++ /dev/null
@@ -1,133 +0,0 @@
-# This Source Code Form is subject to the terms of the Mozilla Public
-# License, v. 2.0. If a copy of the MPL was not distributed with this
-# file, You can obtain one at http://mozilla.org/MPL/2.0/.
-
-browser.jar:
-% skin browser classic/1.0 %skin/classic/browser/
-% override chrome://global/skin/icons/warning-16.png moz-icon://stock/gtk-dialog-warning?size=menu
-#include ../shared/jar.inc.mn
-  skin/classic/browser/sanitizeDialog.css
-  skin/classic/browser/aboutSessionRestore-window-icon.png
-  skin/classic/browser/aboutSyncTabs.css
-* skin/classic/browser/syncedtabs/sidebar.css     (syncedtabs/sidebar.css)
-  skin/classic/browser/actionicon-tab.png
-* skin/classic/browser/browser.css
-* skin/classic/browser/devedition.css
-* skin/classic/browser/browser-lightweightTheme.css
-  skin/classic/browser/click-to-play-warning-stripes.png
-  skin/classic/browser/Info.png
-  skin/classic/browser/menuPanel-customize.png
-  skin/classic/browser/menuPanel-customize@2x.png
-  skin/classic/browser/menuPanel-exit.png
-  skin/classic/browser/menuPanel-exit@2x.png
-  skin/classic/browser/menuPanel-help.png
-  skin/classic/browser/menuPanel-help@2x.png
-  skin/classic/browser/monitor.png
-  skin/classic/browser/monitor_16-10.png
-* skin/classic/browser/pageInfo.css
-  skin/classic/browser/pageInfo.png
-  skin/classic/browser/page-livemarks.png
-  skin/classic/browser/Privacy-16.png
-  skin/classic/browser/privatebrowsing-mask.png
-  skin/classic/browser/reload-stop-go.png
-  skin/classic/browser/reload-stop-go@2x.png
-  skin/classic/browser/searchbar.css
-  skin/classic/browser/Security-broken.png
-  skin/classic/browser/setDesktopBackground.css
-  skin/classic/browser/slowStartup-16.png
-  skin/classic/browser/Toolbar.png
-  skin/classic/browser/Toolbar@2x.png
-  skin/classic/browser/Toolbar-inverted.png
-  skin/classic/browser/Toolbar-inverted@2x.png
-  skin/classic/browser/Toolbar-small.png
-  skin/classic/browser/webRTC-indicator.css
-* skin/classic/browser/controlcenter/panel.css        (controlcenter/panel.css)
-  skin/classic/browser/customizableui/background-noise-toolbar.png  (customizableui/background-noise-toolbar.png)
-  skin/classic/browser/customizableui/customizeMode-gridTexture.png  (customizableui/customizeMode-gridTexture.png)
-  skin/classic/browser/customizableui/customizeMode-separatorHorizontal.png  (customizableui/customizeMode-separatorHorizontal.png)
-  skin/classic/browser/customizableui/customizeMode-separatorVertical.png  (customizableui/customizeMode-separatorVertical.png)
-* skin/classic/browser/customizableui/panelUI.css (customizableui/panelUI.css)
-* skin/classic/browser/downloads/allDownloadsViewOverlay.css   (downloads/allDownloadsViewOverlay.css)
-  skin/classic/browser/downloads/download-glow-menuPanel.png (downloads/download-glow-menuPanel.png)
-  skin/classic/browser/downloads/download-notification-finish.png (downloads/download-notification-finish.png)
-  skin/classic/browser/downloads/download-notification-start.png (downloads/download-notification-start.png)
-* skin/classic/browser/downloads/downloads.css        (downloads/downloads.css)
-  skin/classic/browser/feeds/feedIcon.png             (feeds/feedIcon.png)
-  skin/classic/browser/feeds/feedIcon16.png           (feeds/feedIcon16.png)
-  skin/classic/browser/feeds/subscribe.css            (feeds/subscribe.css)
-  skin/classic/browser/feeds/subscribe-ui.css         (feeds/subscribe-ui.css)
-* skin/classic/browser/newtab/newTab.css              (newtab/newTab.css)
-  skin/classic/browser/places/autocomplete-star.png   (places/autocomplete-star.png)
-  skin/classic/browser/places/bookmarksMenu.png       (places/bookmarksMenu.png)
-  skin/classic/browser/places/bookmarksToolbar.png    (places/bookmarksToolbar.png)
-  skin/classic/browser/places/bookmarksToolbar-menuPanel.png (places/bookmarksToolbar-menuPanel.png)
-  skin/classic/browser/places/bookmarks-notification-finish.png  (places/bookmarks-notification-finish.png)
-  skin/classic/browser/places/bookmarks-menu-arrow.png           (places/bookmarks-menu-arrow.png)
-  skin/classic/browser/places/calendar.png            (places/calendar.png)
-* skin/classic/browser/places/editBookmarkOverlay.css (places/editBookmarkOverlay.css)
-  skin/classic/browser/places/livemark-item.png       (places/livemark-item.png)
-  skin/classic/browser/places/starred48.png           (places/starred48.png)
-  skin/classic/browser/places/unstarred48.png         (places/unstarred48.png)
-  skin/classic/browser/places/places.css              (places/places.css)
-  skin/classic/browser/places/organizer.css           (places/organizer.css)
-  skin/classic/browser/places/organizer.xml           (places/organizer.xml)
-  skin/classic/browser/places/query.png               (places/query.png)
-  skin/classic/browser/places/tag.png                 (places/tag.png)
-  skin/classic/browser/places/toolbarDropMarker.png   (places/toolbarDropMarker.png)
-  skin/classic/browser/places/unsortedBookmarks.png   (places/unsortedBookmarks.png)
-  skin/classic/browser/places/downloads.png           (places/downloads.png)
-  skin/classic/browser/preferences/alwaysAsk.png      (preferences/alwaysAsk.png)
-  skin/classic/browser/preferences/preferences.css    (preferences/preferences.css)
-* skin/classic/browser/preferences/in-content/preferences.css (preferences/in-content/preferences.css)
-* skin/classic/browser/preferences/in-content/dialog.css      (preferences/in-content/dialog.css)
-  skin/classic/browser/preferences/applications.css   (preferences/applications.css)
-  skin/classic/browser/tabbrowser/alltabs.png         (tabbrowser/alltabs.png)
-  skin/classic/browser/tabbrowser/alltabs-inverted.png (tabbrowser/alltabs-inverted.png)
-  skin/classic/browser/tabbrowser/newtab.svg                (tabbrowser/newtab.svg)
-  skin/classic/browser/tabbrowser/newtab-inverted.svg       (tabbrowser/newtab-inverted.svg)
-  skin/classic/browser/tabbrowser/tab-active-middle.png     (tabbrowser/tab-active-middle.png)
-  skin/classic/browser/tabbrowser/tab-active-middle@2x.png  (tabbrowser/tab-active-middle@2x.png)
-  skin/classic/browser/tabbrowser/tab-arrow-left.png        (tabbrowser/tab-arrow-left.png)
-  skin/classic/browser/tabbrowser/tab-arrow-left-inverted.png (tabbrowser/tab-arrow-left-inverted.png)
-  skin/classic/browser/tabbrowser/tab-background-end.png    (tabbrowser/tab-background-end.png)
-  skin/classic/browser/tabbrowser/tab-background-end@2x.png (tabbrowser/tab-background-end@2x.png)
-  skin/classic/browser/tabbrowser/tab-background-middle.png    (tabbrowser/tab-background-middle.png)
-  skin/classic/browser/tabbrowser/tab-background-middle@2x.png (tabbrowser/tab-background-middle@2x.png)
-  skin/classic/browser/tabbrowser/tab-background-start.png     (tabbrowser/tab-background-start.png)
-  skin/classic/browser/tabbrowser/tab-background-start@2x.png  (tabbrowser/tab-background-start@2x.png)
-
-# NOTE: The following two files (tab-selected-end.svg, tab-selected-start.svg) get pre-processed in
-#       Makefile.in with a non-default marker of "%" and the result of that gets packaged.
-  skin/classic/browser/tabbrowser/tab-selected-end.svg      (tab-selected-end.svg)
-  skin/classic/browser/tabbrowser/tab-selected-start.svg    (tab-selected-start.svg)
-
-  skin/classic/browser/tabbrowser/tab-stroke-end.png        (tabbrowser/tab-stroke-end.png)
-  skin/classic/browser/tabbrowser/tab-stroke-end@2x.png     (tabbrowser/tab-stroke-end@2x.png)
-  skin/classic/browser/tabbrowser/tab-stroke-start.png      (tabbrowser/tab-stroke-start.png)
-  skin/classic/browser/tabbrowser/tab-stroke-start@2x.png   (tabbrowser/tab-stroke-start@2x.png)
-  skin/classic/browser/tabbrowser/tabDragIndicator.png      (tabbrowser/tabDragIndicator.png)
-
-  skin/classic/browser/sync-16.png
-  skin/classic/browser/sync-32.png
-  skin/classic/browser/sync-bg.png
-  skin/classic/browser/sync-128.png
-  skin/classic/browser/sync-desktopIcon.svg  (../shared/sync-desktopIcon.svg)
-  skin/classic/browser/sync-horizontalbar.png
-  skin/classic/browser/sync-horizontalbar@2x.png
-  skin/classic/browser/sync-mobileIcon.svg  (../shared/sync-mobileIcon.svg)
-  skin/classic/browser/sync-notification-24.png
-  skin/classic/browser/syncProgress-menuPanel.png
-  skin/classic/browser/syncProgress-menuPanel@2x.png
-  skin/classic/browser/syncProgress-toolbar.png
-  skin/classic/browser/syncProgress-toolbar-inverted.png
-  skin/classic/browser/syncSetup.css
-  skin/classic/browser/syncCommon.css
-  skin/classic/browser/syncQuota.css
-  skin/classic/browser/syncProgress-horizontalbar.png
-  skin/classic/browser/syncProgress-horizontalbar@2x.png
-
-[extensions/{972ce4c6-7e08-4474-a285-3208198ce6fd}] chrome.jar:
-% override chrome://browser/skin/feeds/audioFeedIcon.png              chrome://browser/skin/feeds/feedIcon.png
-% override chrome://browser/skin/feeds/audioFeedIcon16.png            chrome://browser/skin/feeds/feedIcon16.png
-% override chrome://browser/skin/feeds/videoFeedIcon.png              chrome://browser/skin/feeds/feedIcon.png
-% override chrome://browser/skin/feeds/videoFeedIcon16.png            chrome://browser/skin/feeds/feedIcon16.png
diff --git a/browser/themes/linux/linuxShared.inc b/browser/themes/linux/linuxShared.inc
deleted file mode 100644
index 80f88ae73..000000000
--- a/browser/themes/linux/linuxShared.inc
+++ /dev/null
@@ -1,13 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-%filter substitution
-
-%define toolbarHighlight hsla(0,0%,100%,.15)
-%define toolbarHighlightLWT rgba(255,255,255,.4)
-/* navbarInsetHighlight is tightly coupled to the toolbarHighlight constant. */
-%define navbarInsetHighlight hsla(0,0%,100%,.4)
-%define fgTabTexture linear-gradient(transparent 2px, @toolbarHighlight@ 2px, @toolbarHighlight@)
-%define fgTabTextureLWT linear-gradient(transparent 2px, @toolbarHighlightLWT@ 2px, @toolbarHighlightLWT@)
-%define fgTabBackgroundColor -moz-dialog
diff --git a/browser/themes/linux/menuPanel-customize.png b/browser/themes/linux/menuPanel-customize.png
deleted file mode 100644
index e0b0a70a3..000000000
--- a/browser/themes/linux/menuPanel-customize.png
+++ /dev/null
diff --git a/browser/themes/linux/menuPanel-customize@2x.png b/browser/themes/linux/menuPanel-customize@2x.png
deleted file mode 100644
index 5ce3b766a..000000000
--- a/browser/themes/linux/menuPanel-customize@2x.png
+++ /dev/null
diff --git a/browser/themes/linux/menuPanel-exit.png b/browser/themes/linux/menuPanel-exit.png
deleted file mode 100644
index 8daaffe95..000000000
--- a/browser/themes/linux/menuPanel-exit.png
+++ /dev/null
diff --git a/browser/themes/linux/menuPanel-exit@2x.png b/browser/themes/linux/menuPanel-exit@2x.png
deleted file mode 100644
index d48426546..000000000
--- a/browser/themes/linux/menuPanel-exit@2x.png
+++ /dev/null
diff --git a/browser/themes/linux/menuPanel-help.png b/browser/themes/linux/menuPanel-help.png
deleted file mode 100644
index 962001ff6..000000000
--- a/browser/themes/linux/menuPanel-help.png
+++ /dev/null
diff --git a/browser/themes/linux/menuPanel-help@2x.png b/browser/themes/linux/menuPanel-help@2x.png
deleted file mode 100644
index b8f0a80fa..000000000
--- a/browser/themes/linux/menuPanel-help@2x.png
+++ /dev/null
diff --git a/browser/themes/linux/monitor.png b/browser/themes/linux/monitor.png
deleted file mode 100644
index 35e7b2056..000000000
--- a/browser/themes/linux/monitor.png
+++ /dev/null
diff --git a/browser/themes/linux/monitor_16-10.png b/browser/themes/linux/monitor_16-10.png
deleted file mode 100644
index 41950340e..000000000
--- a/browser/themes/linux/monitor_16-10.png
+++ /dev/null
diff --git a/browser/themes/linux/moz.build b/browser/themes/linux/moz.build
deleted file mode 100644
index 8b611040d..000000000
--- a/browser/themes/linux/moz.build
+++ /dev/null
@@ -1,11 +0,0 @@
-# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
-# vim: set filetype=python:
-# This Source Code Form is subject to the terms of the Mozilla Public
-# License, v. 2.0. If a copy of the MPL was not distributed with this
-# file, You can obtain one at http://mozilla.org/MPL/2.0/.
-
-DIRS += ['communicator']
-
-JAR_MANIFESTS += ['jar.mn']
-
-include('../tab-svgs.mozbuild')
diff --git a/browser/themes/linux/newtab/newTab.css b/browser/themes/linux/newtab/newTab.css
deleted file mode 100644
index 371594f06..000000000
--- a/browser/themes/linux/newtab/newTab.css
+++ /dev/null
@@ -1,19 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-%include ../../shared/newtab/newTab.inc.css
-
-
-.newtab-undo-button {
-  color: rgb(221,72,20);
-}
-
-#newtab-undo-close-button {
-  height: 16px;
-  width: 16px;
-}
-
-.newtab-title {
-  font-family: sans-serif;
-}
diff --git a/browser/themes/linux/page-livemarks.png b/browser/themes/linux/page-livemarks.png
deleted file mode 100644
index c3b534e04..000000000
--- a/browser/themes/linux/page-livemarks.png
+++ /dev/null
diff --git a/browser/themes/linux/pageInfo.css b/browser/themes/linux/pageInfo.css
deleted file mode 100644
index 6cf37a7c9..000000000
--- a/browser/themes/linux/pageInfo.css
+++ /dev/null
@@ -1,267 +0,0 @@
-%if 0
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-%endif
-
-@import url("chrome://global/skin/");
-
-/* View buttons */
-#viewGroup > radio {
-  list-style-image: url("chrome://browser/skin/pageInfo.png");
-  -moz-box-orient: vertical;
-  -moz-box-align: center;
-  -moz-appearance: none;
-  min-width: 4.5em;
-  margin: 0;
-  padding: 3px;
-  color: -moz-FieldText;
-}
-
-#viewGroup > radio[selected="true"] {
-  background-color: Highlight;
-  color: HighlightText;
-}
-
-#topBar {
-  -moz-appearance: listbox;
-  margin: 8px 8px 0;
-}
-
-#generalTab {
-  -moz-image-region: rect(0px, 32px, 32px, 0px)
-}
-
-#mediaTab {
-  -moz-image-region: rect(0px, 64px, 32px, 32px)
-}
-
-#feedTab {
-  -moz-image-region: rect(0px, 96px, 32px, 64px)
-}
-
-#permTab {
-  -moz-image-region: rect(0px, 128px, 32px, 96px)
-}
-
-#securityTab {
-  -moz-image-region: rect(0px, 160px, 32px, 128px)
-}
-
-#mainDeck {
-  padding-left: 2px;
-  padding-right: 2px;
-}
-
-deck {
-  padding: 10px 10px 10px 10px;
-}
-
-/* Misc */
-tree {
-  margin: .5em;
-}
-
-.gridSeparator {
-  width: .5em;
-}
-
-textbox {
-  background: transparent !important;
-  border: none;
-  padding: 0px;
-  margin-top: 1px;
-  -moz-appearance: none;
-}
-
-textbox.header {
-  margin-inline-start: 0;
-}
-
-.iframe {
-  margin: .5em;
-  background: white;
-  overflow: auto;
-}
-
-.fixedsize {
-  height: 8.5em;
-}
-
-textbox[disabled] {
-  font-style: italic;
-}
-
-/* General Tab */
-#generalPanel > #titletext {
-  margin-inline-start: 5px;
-}
-
-groupbox.collapsable caption .caption-icon {
-  width: 9px;
-  height: 9px;
-  background-repeat: no-repeat;
-  background-position: center;
-  margin-inline-start: 1px;
-  margin-inline-end: 3px;
-  background-image: url("chrome://global/skin/tree/twisty-open.png");
-}
-
-groupbox.collapsable[closed="true"] {
-  border: none;
-}
-
-groupbox.collapsable[closed="true"] caption .caption-icon {
-  background-image: url("chrome://global/skin/tree/twisty-clsd.png");
-}
-
-groupbox tree {
-  margin: 0;
-  border: none;
-}
-
-groupbox.treebox .groupbox-body {
-  margin-inline-start: 5px;
-  margin-inline-end: 1px;
-  padding-top: 0;
-}
-
-#securityBox description {
-  margin-inline-start: 10px;
-}
-
-#general-security-identity {
-  white-space: pre-wrap;
-  line-height: 2em;
-}
-
-/* Media Tab */
-#imagetree {
-  min-height: 10em;
-  margin-top: 2px;
-  margin-bottom: 0;
-}
-
-#mediaSplitter {
-  -moz-appearance: none;
-  height: .8em;
-}
-
-#mediaGrid {
-  min-height: 9em;
-}
-
-#mediaLabelColumn {
-  min-width: 10em;
-}
-
-#thepreviewimage {
-  margin: 1em;
-}
-
-treechildren::-moz-tree-cell-text(broken) {
-  font-style: italic;
-  color: graytext;
-}
-
-#mediaPreviewBox .inset {
-  -moz-appearance: listbox;
-  margin-bottom: 0;
-}
-
-/* Feeds Tab */
-#feedPanel {
-  margin-left: 2px;
-  margin-right: 2px;
-}
-
-#feedtree {
-  margin-bottom: 0px;
-}
-
-#feedListbox richlistitem {
-  padding-top: 6px;
-  padding-bottom: 6px;
-  padding-inline-start: 7px;
-  padding-inline-end: 7px;
-  min-height: 25px;
-  border-bottom: 1px dotted #C0C0C0;
-  color: -moz-FieldText;
-}
-
-#feedListbox richlistitem[selected="true"] {
-  background-color: -moz-Dialog;
-  color: -moz-DialogText;
-}
-
-#feedListbox {
-  margin-bottom: 0;
-  border: 2px solid;
-  -moz-border-top-colors: ThreeDShadow ThreeDDarkShadow;
-  -moz-border-right-colors: ThreeDHighlight ThreeDLightShadow;
-  -moz-border-bottom-colors: ThreeDHighlight ThreeDLightShadow;
-  -moz-border-left-colors: ThreeDShadow ThreeDDarkShadow;
-}
-
-.feedTitle {
-  font-weight: bold;
-}
-
-/* Permissions Tab */
-#permPanel {
-  margin-left: 6px;
-  margin-right: 6px;
-}
-
-#permList {
-  -moz-appearance: listbox;
-  margin-top: .5em;
-  overflow: auto;
-  border: 2px solid;
-  -moz-border-top-colors: ThreeDShadow ThreeDDarkShadow;
-  -moz-border-right-colors: ThreeDHighlight ThreeDLightShadow;
-  -moz-border-bottom-colors: ThreeDHighlight ThreeDLightShadow;
-  -moz-border-left-colors: ThreeDShadow ThreeDDarkShadow;
-  background-color: -moz-field;
-  color: -moz-FieldText;
-}
-
-.permission {
-  padding-top: 6px;
-  padding-bottom: 6px;
-  padding-inline-start: 7px;
-  padding-inline-end: 7px;
-  min-height: 25px;
-  border-bottom: 1px dotted #C0C0C0;
-}
-
-.permissionLabel {
-  font-weight: bold;
-}
-
-.permission:hover {
-  background-color: -moz-dialog;
-  color: -moz-DialogText;
-}
-
-/* Security Tab */
-#securityPanel .caption-icon {
-  display: none;
-}
-
-#securityPanel .header {
-  font-size: 120%;
-}
-
-#securityPanel .fieldLabel {
-  margin: 2px 10px 3px;
-}
-
-#securityPanel .fieldValue {
-  font-weight: bold;
-  margin: 2px 10px 3px;
-}
-
-#securityPanel row {
-  -moz-box-align: center;
-}
diff --git a/browser/themes/linux/pageInfo.png b/browser/themes/linux/pageInfo.png
deleted file mode 100644
index 2cbb15df9..000000000
--- a/browser/themes/linux/pageInfo.png
+++ /dev/null
diff --git a/browser/themes/linux/places/autocomplete-star.png b/browser/themes/linux/places/autocomplete-star.png
deleted file mode 100644
index 2675f9345..000000000
--- a/browser/themes/linux/places/autocomplete-star.png
+++ /dev/null
diff --git a/browser/themes/linux/places/bookmarks-menu-arrow.png b/browser/themes/linux/places/bookmarks-menu-arrow.png
deleted file mode 100644
index 616f16b7f..000000000
--- a/browser/themes/linux/places/bookmarks-menu-arrow.png
+++ /dev/null
diff --git a/browser/themes/linux/places/bookmarks-notification-finish.png b/browser/themes/linux/places/bookmarks-notification-finish.png
deleted file mode 100644
index 8520b4985..000000000
--- a/browser/themes/linux/places/bookmarks-notification-finish.png
+++ /dev/null
diff --git a/browser/themes/linux/places/bookmarksMenu.png b/browser/themes/linux/places/bookmarksMenu.png
deleted file mode 100644
index 80dd2168d..000000000
--- a/browser/themes/linux/places/bookmarksMenu.png
+++ /dev/null
diff --git a/browser/themes/linux/places/bookmarksToolbar-menuPanel.png b/browser/themes/linux/places/bookmarksToolbar-menuPanel.png
deleted file mode 100644
index 367a9090d..000000000
--- a/browser/themes/linux/places/bookmarksToolbar-menuPanel.png
+++ /dev/null
diff --git a/browser/themes/linux/places/bookmarksToolbar.png b/browser/themes/linux/places/bookmarksToolbar.png
deleted file mode 100644
index 09502fe83..000000000
--- a/browser/themes/linux/places/bookmarksToolbar.png
+++ /dev/null
diff --git a/browser/themes/linux/places/calendar.png b/browser/themes/linux/places/calendar.png
deleted file mode 100644
index f7128685c..000000000
--- a/browser/themes/linux/places/calendar.png
+++ /dev/null
diff --git a/browser/themes/linux/places/downloads.png b/browser/themes/linux/places/downloads.png
deleted file mode 100644
index d641714aa..000000000
--- a/browser/themes/linux/places/downloads.png
+++ /dev/null
diff --git a/browser/themes/linux/places/editBookmarkOverlay.css b/browser/themes/linux/places/editBookmarkOverlay.css
deleted file mode 100644
index dba6ba655..000000000
--- a/browser/themes/linux/places/editBookmarkOverlay.css
+++ /dev/null
@@ -1,71 +0,0 @@
-%if 0
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-%endif
-/**** folder menulist ****/
-.folder-icon > .menulist-label-box > .menulist-icon {
-  width: 16px;
-  height: 16px;
-}
-
-.folder-icon > .menu-iconic-left {
-  display: -moz-box;
-}
-
-.folder-icon {
-  list-style-image: url("moz-icon://stock/gtk-directory?size=menu") !important;
-}
-
-
-/**** expanders ****/
-
-.expander-up,
-.expander-down {
-  min-width: 0;
-  padding: 2px 0;
-  padding-inline-start: 2px;
-}
-
-.expander-up > .button-box {
-  -moz-appearance: button-arrow-up;
-}
-
-.expander-down > .button-box {
-  -moz-appearance: button-arrow-down;
-}
-
-#editBookmarkPanelContent {
-  min-width: 23em;
-}
-
-#editBMPanel_folderTree {
-  margin-top: 2px;
-  margin-bottom: 2px;
-}
-
-/* Hide the value column of the tag autocomplete popup
- * leaving only the comment column visible. This is
- * so that only the tag being edited is shown in the
- * popup.
- */
-#editBMPanel_tagsField #treecolAutoCompleteValue {
-  visibility: collapse;
-}
-
-
-/* Bookmark panel dropdown menu items */
-#editBMPanel_folderMenuList[selectedIndex="0"],
-#editBMPanel_toolbarFolderItem {
-  list-style-image: url("chrome://browser/skin/places/bookmarksToolbar.png") !important;  
-}
-
-#editBMPanel_folderMenuList[selectedIndex="1"],
-#editBMPanel_bmRootItem {
-  list-style-image: url("chrome://browser/skin/places/bookmarksMenu.png") !important;  
-}
-
-#editBMPanel_folderMenuList[selectedIndex="2"],
-#editBMPanel_unfiledRootItem {
-  list-style-image: url("chrome://browser/skin/places/unsortedBookmarks.png") !important;  
-}
diff --git a/browser/themes/linux/places/livemark-item.png b/browser/themes/linux/places/livemark-item.png
deleted file mode 100644
index 9184b9518..000000000
--- a/browser/themes/linux/places/livemark-item.png
+++ /dev/null
diff --git a/browser/themes/linux/places/organizer.css b/browser/themes/linux/places/organizer.css
deleted file mode 100644
index d1881dbb4..000000000
--- a/browser/themes/linux/places/organizer.css
+++ /dev/null
@@ -1,103 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-
-/* Toolbar */
-#placesToolbar {
-  -moz-appearance: menubar;
-}
-
-#placesToolbar:-moz-system-metric(menubar-drag) {
-  -moz-binding: url("chrome://global/content/bindings/toolbar.xml#toolbar-drag");
-}
-
-#placesToolbar > toolbarbutton {
-  color: -moz-menubartext;
-}
-
-#placesToolbar > toolbarbutton:hover {
-  color: ButtonText;
-}
-
-#placesToolbar > toolbarbutton[disabled=true] {
-  color: GrayText;
-}
-
-/* back button */
-
-#back-button {
-  list-style-image: url("moz-icon://stock/gtk-go-back-ltr?size=toolbar");
-}
-#back-button[disabled="true"] {
-  list-style-image: url("moz-icon://stock/gtk-go-back-ltr?size=toolbar&state=disabled");
-}
-
-#back-button:-moz-locale-dir(rtl) {
-  list-style-image: url("moz-icon://stock/gtk-go-back-rtl?size=toolbar");
-}
-#back-button[disabled="true"]:-moz-locale-dir(rtl) {
-  list-style-image: url("moz-icon://stock/gtk-go-back-rtl?size=toolbar&state=disabled");
-}
-
-/* forward button */
-
-#forward-button {
-  list-style-image: url("moz-icon://stock/gtk-go-forward-ltr?size=toolbar");
-}
-#forward-button[disabled="true"] {
-  list-style-image: url("moz-icon://stock/gtk-go-forward-ltr?size=toolbar&state=disabled");
-}
-
-#forward-button:-moz-locale-dir(rtl) {
-  list-style-image: url("moz-icon://stock/gtk-go-forward-rtl?size=toolbar");
-}
-#forward-button[disabled="true"]:-moz-locale-dir(rtl) {
-  list-style-image: url("moz-icon://stock/gtk-go-forward-rtl?size=toolbar&state=disabled");
-}
-
-/* Menu */
-#placesMenu {
-  -moz-appearance: none;
-  border: none;
-}
-
-#placesMenu > menu {
-  padding-inline-start: 4px;
-  -moz-binding: url("chrome://browser/skin/places/organizer.xml#toolbarbutton-dropdown");
-  -moz-appearance: toolbarbutton;
-}
-
-#placesMenu > menu:active,
-#placesMenu > menu:hover,
-#placesMenu > menu[open] {
-  color: ButtonText;
-}
-
-#placesMenu > menu > .menubar-right {
-  -moz-appearance: toolbarbutton-dropdown;
-  width: 12px;
-  height: 12px;
-}
-
-/* Root View */
-#placesView {
-  background-color: Window;
-}
-
-/* Info box */
-#detailsDeck {
-  padding: 5px;
-}
-
-#infoBoxExpanderLabel {
-  padding-inline-start: 2px;
-}
-
-/**
- * Downloads pane
- */
-
-#clearDownloadsButton > .toolbarbutton-icon {
-  display: none;
-}
diff --git a/browser/themes/linux/places/organizer.xml b/browser/themes/linux/places/organizer.xml
deleted file mode 100644
index 8331ebb11..000000000
--- a/browser/themes/linux/places/organizer.xml
+++ /dev/null
@@ -1,21 +0,0 @@
-<?xml version="1.0"?>
-
-<!-- This Source Code Form is subject to the terms of the Mozilla Public
-   - License, v. 2.0. If a copy of the MPL was not distributed with this
-   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
-
-<bindings id="organizerBindings"
-          xmlns="http://www.mozilla.org/xbl"
-          xmlns:xul="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"
-          xmlns:xbl="http://www.mozilla.org/xbl">
-
-  <binding id="toolbarbutton-dropdown"
-           extends="chrome://global/content/bindings/menu.xml#menu-base">
-    <content>
-      <xul:image class="menubar-left" xbl:inherits="src=image"/>
-      <xul:label class="menubar-text" xbl:inherits="value=label,accesskey,crop" crop="right"/>
-      <xul:hbox class="menubar-right"/>
-      <children includes="menupopup"/>
-    </content>
-  </binding>
-</bindings>
diff --git a/browser/themes/linux/places/places.css b/browser/themes/linux/places/places.css
deleted file mode 100644
index 776191dd5..000000000
--- a/browser/themes/linux/places/places.css
+++ /dev/null
@@ -1,122 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-/* Sidebars */
-.sidebar-placesTree {
-  margin: 0;
-}
-
-.sidebar-placesTreechildren::-moz-tree-cell(leaf) ,
-.sidebar-placesTreechildren::-moz-tree-image(leaf) {
-  cursor: pointer;
-}
-
-.sidebar-placesTreechildren::-moz-tree-cell-text(leaf, hover) {
-  cursor: pointer;
-  text-decoration: underline;
-}
-
-.sidebar-placesTreechildren::-moz-tree-cell(separator) {
-  cursor: default;
-}
-
-/* Trees */
-treechildren::-moz-tree-image(title) {
-  padding-right: 2px;
-  margin: 0px 2px;
-  width: 16px;
-  height: 16px;
-  list-style-image: url("chrome://mozapps/skin/places/defaultFavicon.png");
-}
-
-treechildren::-moz-tree-image(title, livemarkItem) {
-  list-style-image: url("chrome://browser/skin/places/livemark-item.png");
-  -moz-image-region: rect(0px, 16px, 16px, 0px);
-}
-
-treechildren::-moz-tree-image(title, livemarkItem, visited) {
-  -moz-image-region: rect(0px, 32px, 16px, 16px);
-}
-
-treechildren::-moz-tree-image(title, separator) {
-  list-style-image: none;
-  width: 0;
-  height: 0;
-}
-
-treechildren::-moz-tree-image(title, container) {
-  list-style-image: url("moz-icon://stock/gtk-directory?size=menu");
-}
-
-treechildren::-moz-tree-image(title, container, livemark) {
-  list-style-image: url("chrome://browser/skin/feeds/feedIcon16.png");
-  -moz-image-region: auto;
-}
-
-treechildren::-moz-tree-image(container, OrganizerQuery_AllBookmarks) {
-  list-style-image: url("chrome://browser/skin/Toolbar-small.png");
-  -moz-image-region: rect(0px 48px 16px 32px);
-}
-
-treechildren::-moz-tree-image(container, OrganizerQuery_BookmarksToolbar) {
-  list-style-image: url("chrome://browser/skin/places/bookmarksToolbar.png");
-  -moz-image-region: auto;
-}
-
-treechildren::-moz-tree-image(container, OrganizerQuery_BookmarksMenu) {
-  list-style-image: url("chrome://browser/skin/places/bookmarksMenu.png");
-  -moz-image-region: auto;
-}
-
-treechildren::-moz-tree-image(container, OrganizerQuery_UnfiledBookmarks) {
-  list-style-image: url("chrome://browser/skin/places/unsortedBookmarks.png");
-  -moz-image-region: auto;
-}
-
-/* query-nodes should be styled even if they're not expandable */
-treechildren::-moz-tree-image(title, query) {
-  list-style-image: url("chrome://browser/skin/places/query.png");
-}
-
-treechildren::-moz-tree-image(query, OrganizerQuery_Downloads) {
-  list-style-image: url("chrome://browser/skin/places/downloads.png");
-  -moz-image-region: auto;
-}
-
-treechildren::-moz-tree-image(title, query, tagContainer),
-treechildren::-moz-tree-image(query, OrganizerQuery_Tags) {
-  list-style-image: url("chrome://browser/skin/places/tag.png");
-}
-
-/* calendar icon for folders grouping items by date */
-treechildren::-moz-tree-image(title, query, dayContainer) {
-  list-style-image: url("chrome://browser/skin/places/calendar.png");
-}
-
-treechildren::-moz-tree-image(title, query, hostContainer) {
-  list-style-image: url("moz-icon://stock/gtk-directory?size=menu");
-}
-
-treechildren::-moz-tree-image(title, query, hostContainer, open) {
-  list-style-image: url("moz-icon://stock/gtk-directory?size=menu");
-}
-
-treechildren::-moz-tree-image(title, query, OrganizerQuery_History) {
-  list-style-image: url("chrome://browser/skin/Toolbar-small.png");
-  -moz-image-region: rect(0px 32px 16px 16px);
-}
-
-/* We want some queries to look like ordinary folders. This must come
-   after the (title, query) selector, or it would get overridden. */
-treechildren::-moz-tree-image(title, query, folder) {
-  list-style-image: url("moz-icon://stock/gtk-directory?size=menu");
-}
-
-treechildren::-moz-tree-image(cutting) {
-  opacity: 0.5;
-}
-
-treechildren::-moz-tree-cell-text(cutting) {
-  opacity: 0.7;
-}
diff --git a/browser/themes/linux/places/query.png b/browser/themes/linux/places/query.png
deleted file mode 100644
index 2420dee0e..000000000
--- a/browser/themes/linux/places/query.png
+++ /dev/null
diff --git a/browser/themes/linux/places/starred48.png b/browser/themes/linux/places/starred48.png
deleted file mode 100644
index bdcc7e757..000000000
--- a/browser/themes/linux/places/starred48.png
+++ /dev/null
diff --git a/browser/themes/linux/places/tag.png b/browser/themes/linux/places/tag.png
deleted file mode 100644
index 27176cc6d..000000000
--- a/browser/themes/linux/places/tag.png
+++ /dev/null
diff --git a/browser/themes/linux/places/toolbarDropMarker.png b/browser/themes/linux/places/toolbarDropMarker.png
deleted file mode 100644
index ed3200f6c..000000000
--- a/browser/themes/linux/places/toolbarDropMarker.png
+++ /dev/null
diff --git a/browser/themes/linux/places/unsortedBookmarks.png b/browser/themes/linux/places/unsortedBookmarks.png
deleted file mode 100644
index 4dcf76138..000000000
--- a/browser/themes/linux/places/unsortedBookmarks.png
+++ /dev/null
diff --git a/browser/themes/linux/places/unstarred48.png b/browser/themes/linux/places/unstarred48.png
deleted file mode 100644
index 15448636e..000000000
--- a/browser/themes/linux/places/unstarred48.png
+++ /dev/null
diff --git a/browser/themes/linux/preferences/alwaysAsk.png b/browser/themes/linux/preferences/alwaysAsk.png
deleted file mode 100644
index 45256d4e7..000000000
--- a/browser/themes/linux/preferences/alwaysAsk.png
+++ /dev/null
diff --git a/browser/themes/linux/preferences/applications.css b/browser/themes/linux/preferences/applications.css
deleted file mode 100644
index 508076304..000000000
--- a/browser/themes/linux/preferences/applications.css
+++ /dev/null
@@ -1,66 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-/**
- * Line up the actions menu with action labels above and below it.
- * Equalize the distance from the left side of the action box to the left side
- * of the icon for both the menu and the non-menu versions of the action box.
- * Also make sure the labels are the same distance away from the icons.
- */
-.actionsMenu {
-  margin-top: -1px;
-  margin-bottom: -1px;
-  margin-inline-start: -1px;
-  margin-inline-end: 0;
-}
-
-.typeIcon,
-.actionIcon {
-  margin-inline-start: 3px;
-  margin-inline-end: 3px;
-}
-
-#handlersView > richlistitem label {
-  margin-inline-start: 1px;
-  margin-top: 2px;
-}
-
-#handlersView > richlistitem {
-  min-height: 25px;
-}
-
-richlistitem[appHandlerIcon="ask"],
-menuitem[appHandlerIcon="ask"] {
-  list-style-image: url("chrome://browser/skin/preferences/alwaysAsk.png");
-}
-
-richlistitem[appHandlerIcon="save"],
-menuitem[appHandlerIcon="save"] {
-  list-style-image: url("moz-icon://stock/gtk-save?size=menu");
-}
-
-richlistitem[appHandlerIcon="feed"],
-menuitem[appHandlerIcon="feed"] {
-  list-style-image: url("chrome://browser/skin/page-livemarks.png");
-}
-
-richlistitem[appHandlerIcon="plugin"],
-menuitem[appHandlerIcon="plugin"] {
-  list-style-image: url("chrome://mozapps/skin/plugins/pluginGeneric-16.png");
-}
-
-.actionsMenu .menulist-icon {
-  margin-inline-end: 1px;
-  height: 16px;
-  width: 16px;
-}
-
-.actionsMenu > menupopup > menuitem > .menu-iconic-left {
-  padding-inline-start: 0;
-  padding-inline-end: 4px !important;
-}
-
-.actionsMenu > menupopup > menuitem {
-  padding-inline-start: 3px;
-}
diff --git a/browser/themes/linux/preferences/in-content/dialog.css b/browser/themes/linux/preferences/in-content/dialog.css
deleted file mode 100644
index 3b1ae45e0..000000000
--- a/browser/themes/linux/preferences/in-content/dialog.css
+++ /dev/null
@@ -1,19 +0,0 @@
-/* - This Source Code Form is subject to the terms of the Mozilla Public
-   - License, v. 2.0. If a copy of the MPL was not distributed with this file,
-   - You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-%include ../../../shared/incontentprefs/dialog.inc.css
-
-label:not(.menu-text),
-textbox,
-description,
-.tab-text,
-caption > label {
-  font-size: 1.2em;
-}
-
-/* Create a separate rule to unset these styles on .tree-input instead of
-   using :not(.tree-input) so the selector specifity doesn't change. */
-textbox.tree-input {
-  font-size: unset;
-}
diff --git a/browser/themes/linux/preferences/in-content/preferences.css b/browser/themes/linux/preferences/in-content/preferences.css
deleted file mode 100644
index 91997aa0d..000000000
--- a/browser/themes/linux/preferences/in-content/preferences.css
+++ /dev/null
@@ -1,48 +0,0 @@
-/* - This Source Code Form is subject to the terms of the Mozilla Public
-   - License, v. 2.0. If a copy of the MPL was not distributed with this file,
-   - You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-%include ../../../shared/incontentprefs/preferences.inc.css
-
-.treecol-sortdirection {
-  /* override the Linux only toolkit rule */
-  -moz-appearance: none;
-}
-
-.actionsMenu {
-  font-family: "Clear Sans", sans-serif;
-  font-size: 1.25rem;
-  line-height: 22px;
-}
-
-.actionsMenu > .menulist-label-box > .menulist-icon {
-  margin-top: 1px;
-  margin-inline-start: 1px;
-  margin-inline-end: 6px;
-}
-
-.actionsMenu > .menulist-label-box > .menulist-label {
-  margin-top: 2px !important;
-}
-
-#fxaProfileImage {
-  -moz-user-focus: normal;
-}
-
-menulist.actionsMenu > .menulist-dropmarker {
-  margin-top: 11px;
-  margin-bottom: 11px;
-}
-
-textbox + button,
-filefield + button {
-  margin-inline-start: -4px;
-}
-
-/**
- * Dialog
- */
-
-#dialogTitle {
-  font-size: 1em;
-}
diff --git a/browser/themes/linux/preferences/mail.png b/browser/themes/linux/preferences/mail.png
deleted file mode 100644
index 66d2bc9e0..000000000
--- a/browser/themes/linux/preferences/mail.png
+++ /dev/null
diff --git a/browser/themes/linux/preferences/preferences.css b/browser/themes/linux/preferences/preferences.css
deleted file mode 100644
index 45e2dc23d..000000000
--- a/browser/themes/linux/preferences/preferences.css
+++ /dev/null
@@ -1,106 +0,0 @@
-/*
-# -*- Mode: Java; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
-# This Source Code Form is subject to the terms of the Mozilla Public
-# License, v. 2.0. If a copy of the MPL was not distributed with this
-# file, You can obtain one at http://mozilla.org/MPL/2.0/.
-*/
-
-/* Global Styles */
-.checkbox-check {
-  -moz-appearance: checkbox;
-}
-
-/* General Pane */
-#useFirefoxSync,
-#getStarted {
-  font-size: 90%;
-}
-
-#isNotDefaultLabel {
-  font-weight: bold;
-}
-
-/* Content Pane */
-#translationAttributionImage {
-  width: 70px;
-  cursor: pointer;
-}
-
-/* Modeless Window Dialogs */
-.windowDialog,
-.windowDialog prefpane {
-  padding: 0px;
-}
-
-.contentPane {
-  margin: 9px 8px 5px 8px;
-}
-
-.actionButtons {
-  margin: 0px 3px 6px 3px !important;
-}
-
-/* Cookies Manager */
-#cookiesChildren::-moz-tree-image(domainCol) {
-  width: 16px;
-  height: 16px;
-  margin: 0px 2px;
-  list-style-image: url("chrome://mozapps/skin/places/defaultFavicon.png");
-}
-
-#linksOpenInBox {
-  margin-top: 5px;
-}
-
-#advancedPrefs {
-  margin-left: 0;
-  margin-right: 0; 
-}
-
-#cookiesChildren::-moz-tree-image(domainCol, container) {
-  list-style-image: url("moz-icon://stock/gtk-directory?size=menu");
-}
-
-#cookieInfoBox {
-  border: 1px solid ThreeDShadow;
-  border-radius: 0px;
-  margin: 4px;
-  padding: 0px;
-}
-
-/* bottom-most box containing a groupbox in a prefpane. Prevents the bottom
-   of the groupbox from being cutoff */
-.bottomBox {
-  padding-bottom: 4px;
-}
-
-/**
- * Clear Private Data
- */
-#SanitizeDialogPane > groupbox {
-  margin-top: 0;
-}
-
-/* Sync Pane */
-
-#syncDesc {
-  padding: 0 8em;
-}
-
-#accountCaptionImage {
-  list-style-image: url("chrome://mozapps/skin/profile/profileicon.png");
-}
-
-#syncAddDeviceLabel {
-  margin-top: 1em;
-  margin-bottom: 1em;
-}
-
-#noFxaAccount {
-  margin: 5px;
-  line-height: 1.2em;
-}
-
-#noFxaAccount > label:first-child {
-  margin-bottom: 0.6em;
-}
diff --git a/browser/themes/linux/privatebrowsing-mask.png b/browser/themes/linux/privatebrowsing-mask.png
deleted file mode 100644
index 9eaf3aec7..000000000
--- a/browser/themes/linux/privatebrowsing-mask.png
+++ /dev/null
diff --git a/browser/themes/linux/reload-stop-go.png b/browser/themes/linux/reload-stop-go.png
deleted file mode 100644
index 1017be903..000000000
--- a/browser/themes/linux/reload-stop-go.png
+++ /dev/null
diff --git a/browser/themes/linux/reload-stop-go@2x.png b/browser/themes/linux/reload-stop-go@2x.png
deleted file mode 100644
index 38b27bf0c..000000000
--- a/browser/themes/linux/reload-stop-go@2x.png
+++ /dev/null
diff --git a/browser/themes/linux/sanitizeDialog.css b/browser/themes/linux/sanitizeDialog.css
deleted file mode 100644
index e73cd27e7..000000000
--- a/browser/themes/linux/sanitizeDialog.css
+++ /dev/null
@@ -1,107 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-#sanitizeDurationChoice {
-  margin-inline-end: 0;
-}
-
-/* Align the duration label with the warning box and item list */
-#sanitizeDurationLabel {
-  margin-inline-start: 3px;
-}
-
-
-/* Hide the duration dropdown suffix label if it's empty.  Otherwise it
-   takes up a little space, causing the end of the dropdown to not be aligned
-   with the warning box. */
-#sanitizeDurationSuffixLabel[value=""] {
-  display: none;
-}
-
-
-/* Places tree */
-#placesTreechildren::-moz-tree-row(selected),
-#placesTreechildren::-moz-tree-row(grippyRow) {
-  background: #999;
-}
-
-#placesTreechildren::-moz-tree-cell-text(selected) {
-  color: #111;
-}
-
-
-/* Sanitize everything warning box */
-#sanitizeEverythingWarningBox {
-  background-color: Window;
-  border: 1px solid ThreeDDarkShadow;
-  border-radius: 5px;
-  padding: 16px;
-}
-
-#sanitizeEverythingWarningIcon {
-  list-style-image: url("moz-icon://stock/gtk-dialog-warning?size=dialog");
-  padding: 0;
-  margin: 0;
-}
-
-#sanitizeEverythingWarningDescBox {
-  padding: 0 16px;
-  margin: 0;
-}
-
-
-/* Progressive disclosure button */
-#detailsExpanderWrapper {
-  padding: 0;
-  margin-top: 6px;
-  margin-bottom: 6px;
-  margin-inline-start: -4px;
-  margin-inline-end: 0;
-}
-
-.expander-up,
-.expander-down {
-  min-width: 0;
-  padding: 2px 0;
-  padding-inline-start: 2px;
-}
-
-.expander-up {
-  list-style-image: url("chrome://global/skin/arrow/arrow-up.gif");
-}
-
-.expander-down {
-  list-style-image: url("chrome://global/skin/arrow/arrow-dn.gif");
-}
-
-.expander-down:hover:active {
-  list-style-image: url("chrome://global/skin/arrow/arrow-dn-hov.gif");
-}
-
-.expander-up:hover:active {
-  list-style-image: url("chrome://global/skin/arrow/arrow-up-hov.gif");
-}
-
-
-/* Make the item list the same width as the warning box */
-#itemList {
-  margin-inline-start: 0;
-  margin-inline-end: 0;
-}
-
-/* Without this a useless scrollbar appears in the listbox when its rows
-   attribute is set to the total number of listitems, as it is currently.  See
-   bug 489958 comment 14 and bug 491788. */
-#itemList > listitem {
-  padding: 1px 0;
-}
-
-
-/* Align the last dialog button with the end of the warning box */
-.prefWindow-dlgbuttons {
-  margin-inline-end: 0;
-}
-.dialog-button[dlgtype="accept"] {
-  margin-inline-end: 0;
-}
diff --git a/browser/themes/linux/searchbar.css b/browser/themes/linux/searchbar.css
deleted file mode 100644
index cb4103db0..000000000
--- a/browser/themes/linux/searchbar.css
+++ /dev/null
@@ -1,336 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-#PopupSearchAutoComplete {
-  /* JS code forces the panel to have the width of the searchbar rather than
-   * the width of the textfield. Alignment of the panel with the searchbar is
-   * obtained with negative margins here: margin-inline-start when the text
-   * field is in the same direction as the rest of the UI, margin-inline-end
-   * when the textfield's direction has been reversed.
-   * (eg. using ctrl+shift+X) */
-  margin-inline-start: -23px;
-  margin-inline-end: -16px;
-}
-
-.autocomplete-textbox-container {
-  -moz-box-align: stretch;
-}
-
-.textbox-input-box {
-  margin: 0;
-}
-
-/* Engine button */
-.searchbar-engine-image {
-  height: 16px;
-  width: 16px;
-  list-style-image: url("chrome://mozapps/skin/places/defaultFavicon.png");
-  margin-inline-start: -1px;
-}
-
-/* Search go button */
-.search-go-container {
-  -moz-box-align: center;
-}
-
-.search-go-button {
-  padding: 1px;
-  list-style-image: url("chrome://browser/skin/reload-stop-go.png");
-  -moz-image-region: rect(0, 42px, 14px, 28px);
-  width: 14px;
-}
-
-.search-go-button:hover {
-  -moz-image-region: rect(14px, 42px, 28px, 28px);
-}
-
-.search-go-button:hover:active {
-  -moz-image-region: rect(28px, 42px, 42px, 28px);
-}
-
-.search-go-button:-moz-locale-dir(rtl) {
-  transform: scaleX(-1);
-}
-
-menuitem[cmd="cmd_clearhistory"] {
-  list-style-image: url("moz-icon://stock/gtk-clear?size=menu");
-}
-
-menuitem[cmd="cmd_clearhistory"][disabled] {
-  list-style-image: url("moz-icon://stock/gtk-clear?size=menu&state=disabled");
-}
-
-.searchbar-search-button-container {
-  -moz-box-align: center;
-}
-
-.searchbar-search-button {
-  list-style-image: url("chrome://browser/skin/search-indicator.png");
-  -moz-image-region: rect(0, 20px, 20px, 0);
-  margin-top: 1px;
-  margin-bottom: 1px;
-  margin-inline-start: 2px;
-  width: 20px;
-}
-
-.searchbar-search-button[addengines="true"] {
-  list-style-image: url("chrome://browser/skin/search-indicator-badge-add.png");
-}
-
-.searchbar-search-button:hover {
-  -moz-image-region: rect(0, 40px, 20px, 20px);
-}
-
-.searchbar-search-button:hover:active {
-  -moz-image-region: rect(0, 60px, 20px, 40px);
-}
-
-@media (min-resolution: 1.1dppx) {
-  .searchbar-engine-image {
-    list-style-image: url("chrome://mozapps/skin/places/defaultFavicon@2x.png");
-  }
-
-  .searchbar-search-button {
-    list-style-image: url("chrome://browser/skin/search-indicator@2x.png");
-    -moz-image-region: rect(0, 40px, 40px, 0);
-  }
-
-  .searchbar-search-button[addengines="true"] {
-    list-style-image: url("chrome://browser/skin/search-indicator-badge-add@2x.png");
-  }
-
-  .searchbar-search-button:hover {
-    -moz-image-region: rect(0, 80px, 40px, 40px);
-  }
-
-  .searchbar-search-button:hover:active {
-    -moz-image-region: rect(0, 120px, 40px, 80px);
-  }
-
-  .search-go-button {
-    list-style-image: url("chrome://browser/skin/reload-stop-go@2x.png");
-    -moz-image-region: rect(0, 84px, 28px, 56px);
-  }
-
-  .search-go-button:hover {
-    -moz-image-region: rect(28px, 84px, 56px, 56px);
-  }
-
-  .search-go-button:hover:active {
-    -moz-image-region: rect(56px, 84px, 84px, 56px);
-  }
-}
-
-.search-panel-current-engine {
-  -moz-box-align: center;
-}
-
-/**
- * The borders of the various elements are specified as follows.
- *
- * The current engine always has a bottom border.
- * The search results never have a border.
- *
- * When the search results are not collapsed:
- * - The elements underneath the search results all have a top border.
- *
- * When the search results are collapsed:
- * - The elements underneath the search results all have a bottom border, except
- *   the lowest one: search-setting-button.
- */
-
-.search-panel-current-engine {
-  border-top: none !important;
-  border-bottom: 1px solid var(--panel-separator-color) !important;
-}
-
-.search-panel-tree[collapsed=true] + .search-one-offs > .search-panel-header,
-.search-panel-tree[collapsed=true] + .search-one-offs > .search-panel-one-offs,
-.search-panel-tree[collapsed=true] + .search-one-offs > vbox > .addengine-item:first-of-type {
-  border-top: none !important;
-}
-
-.search-panel-tree[collapsed=true] + .search-one-offs > .searchbar-engine-one-off-item,
-.search-panel-tree[collapsed=true] + .search-one-offs > .search-panel-current-input,
-.search-panel-tree[collapsed=true] + .search-one-offs > .search-panel-one-offs,
-.search-panel-tree[collapsed=true] + .search-one-offs > vbox > .addengine-item:last-of-type {
-  border-bottom: 1px solid var(--panel-separator-color) !important;
-}
-
-.search-panel-header {
-  font-weight: normal;
-  background-color: var(--arrowpanel-dimmed);
-  border: none;
-  border-top: 1px solid var(--panel-separator-color);
-  padding: 3px 5px;
-  color: GrayText;
-}
-
-.search-panel-header > label {
-  margin-top: 2px !important;
-  margin-bottom: 1px !important;
-}
-
-.search-panel-current-input > label {
-  margin: 2px 0 1px !important;
-}
-
-.search-panel-input-value {
-  color: -moz-fieldtext;
-}
-
-.search-panel-one-offs {
-  margin: 0 !important;
-  border-top: 1px solid var(--panel-separator-color);
-}
-
-.searchbar-engine-one-off-item {
-  -moz-appearance: none;
-  display: inline-block;
-  border: none;
-  min-width: 48px;
-  height: 32px;
-  margin: 0;
-  padding: 0;
-  background: linear-gradient(transparent 15%, var(--panel-separator-color) 15%, var(--panel-separator-color) 85%, transparent 85%);
-  background-size: 1px auto;
-  background-repeat: no-repeat;
-  background-position: right center;
-  color: GrayText;
-}
-
-.searchbar-engine-one-off-item:-moz-locale-dir(rtl) {
-  background-position: left center;
-}
-
-.searchbar-engine-one-off-item:not(.last-row) {
-  box-sizing: content-box;
-  border-bottom: 1px solid var(--panel-separator-color);
-}
-
-.search-setting-button-compact {
-  border-bottom: none !important;
-}
-
-.search-panel-one-offs:not([compact=true]) > .searchbar-engine-one-off-item.last-of-row,
-.search-panel-one-offs[compact=true] > .searchbar-engine-one-off-item.last-of-row:not(.dummy),
-.search-panel-one-offs[compact=true] > .searchbar-engine-one-off-item.dummy:not(.last-of-row),
-.search-panel-one-offs[compact=true] > .searchbar-engine-one-off-item.last-engine,
-.search-setting-button-compact {
-  background-image: none;
-}
-
-.searchbar-engine-one-off-item[selected] {
-  background-color: Highlight;
-  background-image: none;
-  color: HighlightText;
-}
-
-.searchbar-engine-one-off-item > .button-box {
-  border: none;
-  padding: 0;
-}
-
-.searchbar-engine-one-off-item > .button-box > .button-text {
-  display: none;
-}
-
-.searchbar-engine-one-off-item > .button-box > .button-icon {
-  display: -moz-box;
-  margin-inline-end: 0;
-  width: 16px;
-  height: 16px;
-}
-
-.addengine-item {
-  -moz-appearance: none;
-  background-color: transparent;
-  color: inherit;
-  border: none;
-  height: 32px;
-  margin: 0;
-  padding: 0 10px;
-}
-
-.addengine-item > .button-box {
-  -moz-box-pack: start;
-}
-
-.addengine-item:first-of-type {
-  border-top: 1px solid var(--panel-separator-color);
-}
-
-.addengine-item[selected] {
-  background-color: Highlight;
-  color: HighlightText;
-}
-
-.addengine-icon {
-  width: 16px;
-}
-
-.addengine-badge {
-  width: 16px;
-  height: 16px;
-  margin: -7px -9px 7px 9px;
-  list-style-image: url("chrome://browser/skin/badge-add-engine.png");
-}
-
-.addengine-item > .button-box > .button-text {
-  -moz-box-flex: 1;
-  text-align: start;
-  padding-inline-start: 10px;
-}
-
-.addengine-item:not([image]) {
-  list-style-image: url("chrome://browser/skin/search-engine-placeholder.png");
-}
-
-@media (min-resolution: 1.1dppx) {
-  .addengine-badge {
-    list-style-image: url("chrome://browser/skin/badge-add-engine@2x.png");
-  }
-
-  .addengine-item:not([image]) {
-    list-style-image: url("chrome://browser/skin/search-engine-placeholder@2x.png");
-  }
-}
-
-.search-panel-tree > .autocomplete-treebody::-moz-tree-cell {
-  border-top: none !important;
-}
-
-.search-panel-tree > .autocomplete-treebody::-moz-tree-cell-text {
-  padding-inline-start: 4px;
-}
-
-.search-panel-tree > .autocomplete-treebody::-moz-tree-image {
-  padding-inline-start: 5px;
-  width: 14px;
-  height: 14px;
-}
-
-.search-panel-tree > .autocomplete-treebody::-moz-tree-image(fromhistory) {
-  list-style-image: url("chrome://browser/skin/search-history-icon.svg#search-history-icon");
-}
-
-.search-panel-tree > .autocomplete-treebody::-moz-tree-image(fromhistory, selected) {
-  list-style-image: url("chrome://browser/skin/search-history-icon.svg#search-history-icon-active");
-}
-
-.search-setting-button {
-  -moz-appearance: none;
-  margin: 0;
-  min-height: 32px;
-}
-
-.search-setting-button[selected] {
-  background-color: var(--arrowpanel-dimmed-further);
-}
-
-.search-setting-button-compact > .button-box > .button-icon {
-  list-style-image: url("chrome://browser/skin/gear.svg");
-  filter: url(chrome://browser/skin/filters.svg#fill);
-  fill: currentColor;
-}
diff --git a/browser/themes/linux/setDesktopBackground.css b/browser/themes/linux/setDesktopBackground.css
deleted file mode 100644
index 585284c7b..000000000
--- a/browser/themes/linux/setDesktopBackground.css
+++ /dev/null
@@ -1,18 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-@namespace url("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul");
-@namespace html url("http://www.w3.org/1999/xhtml");
-
-html|canvas#screen {
-  margin: 12px 11px 32px;
-}
-
-#monitor {
-  list-style-image: url("chrome://browser/skin/monitor.png");
-}
-
-#monitor[aspectratio="16:10"] {
-  list-style-image: url("chrome://browser/skin/monitor_16-10.png");
-}
diff --git a/browser/themes/linux/slowStartup-16.png b/browser/themes/linux/slowStartup-16.png
deleted file mode 100644
index 834dc0f1c..000000000
--- a/browser/themes/linux/slowStartup-16.png
+++ /dev/null
diff --git a/browser/themes/linux/sync-128.png b/browser/themes/linux/sync-128.png
deleted file mode 100644
index 1ea34818c..000000000
--- a/browser/themes/linux/sync-128.png
+++ /dev/null
diff --git a/browser/themes/linux/sync-16.png b/browser/themes/linux/sync-16.png
deleted file mode 100644
index 0afb1c719..000000000
--- a/browser/themes/linux/sync-16.png
+++ /dev/null
diff --git a/browser/themes/linux/sync-32.png b/browser/themes/linux/sync-32.png
deleted file mode 100644
index 7a762cb98..000000000
--- a/browser/themes/linux/sync-32.png
+++ /dev/null
diff --git a/browser/themes/linux/sync-bg.png b/browser/themes/linux/sync-bg.png
deleted file mode 100644
index 893a27d76..000000000
--- a/browser/themes/linux/sync-bg.png
+++ /dev/null
diff --git a/browser/themes/linux/sync-horizontalbar.png b/browser/themes/linux/sync-horizontalbar.png
deleted file mode 100644
index 824d4691b..000000000
--- a/browser/themes/linux/sync-horizontalbar.png
+++ /dev/null
diff --git a/browser/themes/linux/sync-horizontalbar@2x.png b/browser/themes/linux/sync-horizontalbar@2x.png
deleted file mode 100644
index fadb57586..000000000
--- a/browser/themes/linux/sync-horizontalbar@2x.png
+++ /dev/null
diff --git a/browser/themes/linux/sync-notification-24.png b/browser/themes/linux/sync-notification-24.png
deleted file mode 100644
index d67eb47ac..000000000
--- a/browser/themes/linux/sync-notification-24.png
+++ /dev/null
diff --git a/browser/themes/linux/syncCommon.css b/browser/themes/linux/syncCommon.css
deleted file mode 100644
index 1378c9c40..000000000
--- a/browser/themes/linux/syncCommon.css
+++ /dev/null
@@ -1,49 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-/* The following are used by both sync/setup.xul and sync/genericChange.xul */
-.status {
-  color: -moz-dialogtext;
-}
-
-.statusIcon {
-  margin-inline-start: 4px;
-  max-height: 16px;
-  max-width: 16px;
-}
-
-.statusIcon[status="active"] {
-  list-style-image: url("chrome://global/skin/icons/loading.png");
-}
-
-.statusIcon[status="error"] {
-  list-style-image: url("moz-icon://stock/gtk-dialog-error?size=menu");
-}
-
-.statusIcon[status="success"] {
-  list-style-image: url("moz-icon://stock/gtk-dialog-info?size=menu");
-}
-
-/* .data is only used by sync/genericChange.xul, but it seems unnecessary to have
-   a separate stylesheet for it. */
-.data {
-  font-size: 90%;
-  font-weight: bold;
-}
-
-dialog#change-dialog {
-  width: 40em;
-}
-
-image#syncIcon {
-  list-style-image: url("chrome://browser/skin/sync-32.png");
-}
-
-#introText {
-  margin-top: 2px;
-}
-
-#feedback {
-  height: 2em;
-}
diff --git a/browser/themes/linux/syncProgress-horizontalbar.png b/browser/themes/linux/syncProgress-horizontalbar.png
deleted file mode 100644
index 48cd11055..000000000
--- a/browser/themes/linux/syncProgress-horizontalbar.png
+++ /dev/null
diff --git a/browser/themes/linux/syncProgress-horizontalbar@2x.png b/browser/themes/linux/syncProgress-horizontalbar@2x.png
deleted file mode 100644
index e1de4763d..000000000
--- a/browser/themes/linux/syncProgress-horizontalbar@2x.png
+++ /dev/null
diff --git a/browser/themes/linux/syncProgress-menuPanel.png b/browser/themes/linux/syncProgress-menuPanel.png
deleted file mode 100644
index 6fd6f9c16..000000000
--- a/browser/themes/linux/syncProgress-menuPanel.png
+++ /dev/null
diff --git a/browser/themes/linux/syncProgress-menuPanel@2x.png b/browser/themes/linux/syncProgress-menuPanel@2x.png
deleted file mode 100644
index 04b2cae00..000000000
--- a/browser/themes/linux/syncProgress-menuPanel@2x.png
+++ /dev/null
diff --git a/browser/themes/linux/syncProgress-toolbar-inverted.png b/browser/themes/linux/syncProgress-toolbar-inverted.png
deleted file mode 100644
index 4ede4387d..000000000
--- a/browser/themes/linux/syncProgress-toolbar-inverted.png
+++ /dev/null
diff --git a/browser/themes/linux/syncProgress-toolbar.png b/browser/themes/linux/syncProgress-toolbar.png
deleted file mode 100644
index 49e224f0d..000000000
--- a/browser/themes/linux/syncProgress-toolbar.png
+++ /dev/null
diff --git a/browser/themes/linux/syncQuota.css b/browser/themes/linux/syncQuota.css
deleted file mode 100644
index 1577de8a3..000000000
--- a/browser/themes/linux/syncQuota.css
+++ /dev/null
@@ -1,26 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-#quotaDialog {
-  width: 33em;
-  height: 25em;
-}
-
-treechildren::-moz-tree-checkbox {
-  list-style-image: none;
-}
-treechildren::-moz-tree-checkbox(checked) {
-  list-style-image: url("chrome://global/skin/checkbox/cbox-check.gif");
-}
-treechildren::-moz-tree-checkbox(disabled) {
-  list-style-image: url("chrome://global/skin/checkbox/cbox-check-dis.gif");
-}
-
-#treeCaption {
-  height: 4em;
-}
-
-.captionWarning {
-  font-weight: bold;
-}
diff --git a/browser/themes/linux/syncSetup.css b/browser/themes/linux/syncSetup.css
deleted file mode 100644
index 1c79e2f50..000000000
--- a/browser/themes/linux/syncSetup.css
+++ /dev/null
@@ -1,133 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-wizard {
-  -moz-appearance: none;
-  width: 55em;
-  height: 45em;
-  padding: 0;
-  background-color: Window;
-}
-
-.wizard-page-box {
-  -moz-appearance: none;
-  padding-left: 0;
-  padding-right: 0;
-  margin: 0;
-}
-
-wizardpage {
-  -moz-box-pack: center;
-  -moz-box-align: center;
-  margin: 0;
-  padding: 0 6em;
-  background-color: Window;
-}
-
-.wizard-header {
-  -moz-appearance: none;
-  border: none;
-  padding: 2em 0 1em 0;
-  text-align: center;
-}
-.wizard-header-label {
-  font-size: 24pt;
-  font-weight: normal;
-}
-
-.wizard-buttons {
-  background-color: rgba(0,0,0,0.1);
-  padding: 1em;
-}
-
-.wizard-buttons-separator {
-  visibility: collapse;
-}
-
-.wizard-header-icon {
-  visibility: collapse;
-}
-
-.accountChoiceButton {
-  font: menu;
-}
-
-.confirm {
-  border: 1px solid black;
-  padding: 1em;
-  border-radius: 5px;
-}
-
-/* Override the text-link style from global.css */
-description > .text-link,
-description > .text-link:focus {
-  margin: 0px;
-  padding: 0px;
-  border: 0px;
-}
-
-
-.success,
-.error {
-  padding: 2px;
-  border-radius: 2px;
-}
-
-.error {
-  background-color: #FF0000 !important;
-  color: #FFFFFF !important;
-}
-
-.success {
-  background-color: #00FF00 !important;
-}
-
-.warning {
-  font-weight: bold;
-  font-size: 100%;
-  color: red;
-}
-
-.mainDesc {
-  font-weight: bold;
-  font-size: 100%;
-}
-
-.normal {
-  font-size: 100%;
-}
-
-.inputColumn {
-  margin-inline-end: 2px
-}
-
-.pin {
-  font-size: 18pt;
-  width: 4em;
-  text-align: center; 
-}
-
-#passphraseHelpSpacer {
-  width: 0.5em;
-}
-
-#pairDeviceThrobber,
-#login-throbber {
-  -moz-box-align: center;
-}
-
-#pairDeviceThrobber > image,
-#login-throbber > image {
-  width: 16px;
-  list-style-image: url("chrome://global/skin/icons/loading.png");
-}
-
-#captchaFeedback {
-  visibility: hidden;
-}
-
-#successPageIcon {
-  /* TODO replace this with a 128px version (bug 591122) */
-  list-style-image: url("chrome://browser/skin/sync-32.png");
-}
diff --git a/browser/themes/linux/syncedtabs/sidebar.css b/browser/themes/linux/syncedtabs/sidebar.css
deleted file mode 100644
index 04e00a7d4..000000000
--- a/browser/themes/linux/syncedtabs/sidebar.css
+++ /dev/null
@@ -1,69 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-%include ../../shared/syncedtabs/sidebar.inc.css
-
-/* These styles are intended to mimic XUL trees and the XUL search box. */
-
-html {
-  border: 1px solid ThreeDShadow;
-  background-color: -moz-Field;
-  color: -moz-FieldText;
-  box-sizing: border-box;
-}
-
-.item {
-  padding-inline-end: 0;
-}
-
-.item-title {
-  margin: 1px 0 0;
-  margin-inline-end: 6px;
-}
-
-
-.search-box {
-  -moz-appearance: textfield;
-  cursor: text;
-  margin: 2px 4px;
-  border: 2px solid;
-  -moz-border-top-colors: ThreeDShadow ThreeDDarkShadow;
-  -moz-border-right-colors: ThreeDHighlight ThreeDLightShadow;
-  -moz-border-bottom-colors: ThreeDHighlight ThreeDLightShadow;
-  -moz-border-left-colors: ThreeDShadow ThreeDDarkShadow;
-  padding: 2px 2px 3px;
-  padding-inline-start: 4px;
-  background-color: -moz-Field;
-  color: -moz-FieldText;
-}
-
-.textbox-search-clear {
-  background-image: url(moz-icon://stock/gtk-clear?size=menu);
-  background-repeat: no-repeat;
-  width: 16px;
-  height: 16px;
-}
-
-.textbox-search-icon {
-  background-image: url(moz-icon://stock/gtk-find?size=menu);
-  background-repeat: no-repeat;
-  width: 16px;
-  height: 16px;
-  display: block;
-}
-
-.textbox-search-icon[searchbutton]:not([disabled]) ,
-.textbox-search-clear:not([disabled]) {
-  cursor: pointer;
-}
-
-.item.client .item-twisty-container {
-  -moz-appearance: treetwistyopen;
-  margin-top: 3px;
-  margin-left: 2px;
-}
-
-.item.client.closed .item-twisty-container {
-  -moz-appearance: treetwisty;
-}
diff --git a/browser/themes/linux/tabbrowser/alltabs-inverted.png b/browser/themes/linux/tabbrowser/alltabs-inverted.png
deleted file mode 100644
index f3261f1da..000000000
--- a/browser/themes/linux/tabbrowser/alltabs-inverted.png
+++ /dev/null
diff --git a/browser/themes/linux/tabbrowser/alltabs.png b/browser/themes/linux/tabbrowser/alltabs.png
deleted file mode 100644
index a7abe7396..000000000
--- a/browser/themes/linux/tabbrowser/alltabs.png
+++ /dev/null
diff --git a/browser/themes/linux/tabbrowser/newtab-inverted.svg b/browser/themes/linux/tabbrowser/newtab-inverted.svg
deleted file mode 100644
index 2728cda5c..000000000
--- a/browser/themes/linux/tabbrowser/newtab-inverted.svg
+++ /dev/null
@@ -1,13 +0,0 @@
-<!-- This Source Code Form is subject to the terms of the Mozilla Public
-   - License, v. 2.0. If a copy of the MPL was not distributed with this
-   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
-<svg width="16" height="18" xmlns="http://www.w3.org/2000/svg">
-  <g stroke="#666" stroke-width="2" fill="none">
-    <rect x="7" y="3" width="2" height="12" rx="0.25" ry="0.25"/>
-    <rect x="2" y="8" width="12" height="2" rx="0.25" ry="0.25"/>
-  </g>
-  <g fill="#fff">
-    <rect x="7" y="3" width="2" height="12"/>
-    <rect x="2" y="8" width="12" height="2"/>
-  </g>
-</svg>
diff --git a/browser/themes/linux/tabbrowser/newtab.svg b/browser/themes/linux/tabbrowser/newtab.svg
deleted file mode 100644
index 40548da4a..000000000
--- a/browser/themes/linux/tabbrowser/newtab.svg
+++ /dev/null
@@ -1,7 +0,0 @@
-<!-- This Source Code Form is subject to the terms of the Mozilla Public
-   - License, v. 2.0. If a copy of the MPL was not distributed with this
-   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
-<svg width="16" height="18" xmlns="http://www.w3.org/2000/svg" fill="#4c4c4c">
-  <rect x="7" y="3" width="2" height="12"/>
-  <rect x="2" y="8" width="12" height="2"/>
-</svg>
diff --git a/browser/themes/linux/tabbrowser/tab-active-middle.png b/browser/themes/linux/tabbrowser/tab-active-middle.png
deleted file mode 100644
index b7e6d6f77..000000000
--- a/browser/themes/linux/tabbrowser/tab-active-middle.png
+++ /dev/null
diff --git a/browser/themes/linux/tabbrowser/tab-active-middle@2x.png b/browser/themes/linux/tabbrowser/tab-active-middle@2x.png
deleted file mode 100644
index 1e92acbda..000000000
--- a/browser/themes/linux/tabbrowser/tab-active-middle@2x.png
+++ /dev/null
diff --git a/browser/themes/linux/tabbrowser/tab-arrow-left-inverted.png b/browser/themes/linux/tabbrowser/tab-arrow-left-inverted.png
deleted file mode 100644
index 16cd7a277..000000000
--- a/browser/themes/linux/tabbrowser/tab-arrow-left-inverted.png
+++ /dev/null
diff --git a/browser/themes/linux/tabbrowser/tab-arrow-left.png b/browser/themes/linux/tabbrowser/tab-arrow-left.png
deleted file mode 100644
index e0fb348d6..000000000
--- a/browser/themes/linux/tabbrowser/tab-arrow-left.png
+++ /dev/null
diff --git a/browser/themes/linux/tabbrowser/tab-background-end.png b/browser/themes/linux/tabbrowser/tab-background-end.png
deleted file mode 100644
index fb353b17e..000000000
--- a/browser/themes/linux/tabbrowser/tab-background-end.png
+++ /dev/null
diff --git a/browser/themes/linux/tabbrowser/tab-background-end@2x.png b/browser/themes/linux/tabbrowser/tab-background-end@2x.png
deleted file mode 100644
index eefb6ac47..000000000
--- a/browser/themes/linux/tabbrowser/tab-background-end@2x.png
+++ /dev/null
diff --git a/browser/themes/linux/tabbrowser/tab-background-middle.png b/browser/themes/linux/tabbrowser/tab-background-middle.png
deleted file mode 100644
index 51e066c2e..000000000
--- a/browser/themes/linux/tabbrowser/tab-background-middle.png
+++ /dev/null
diff --git a/browser/themes/linux/tabbrowser/tab-background-middle@2x.png b/browser/themes/linux/tabbrowser/tab-background-middle@2x.png
deleted file mode 100644
index b26cb95de..000000000
--- a/browser/themes/linux/tabbrowser/tab-background-middle@2x.png
+++ /dev/null
diff --git a/browser/themes/linux/tabbrowser/tab-background-start.png b/browser/themes/linux/tabbrowser/tab-background-start.png
deleted file mode 100644
index cf0dc852a..000000000
--- a/browser/themes/linux/tabbrowser/tab-background-start.png
+++ /dev/null
diff --git a/browser/themes/linux/tabbrowser/tab-background-start@2x.png b/browser/themes/linux/tabbrowser/tab-background-start@2x.png
deleted file mode 100644
index bbfc77dd1..000000000
--- a/browser/themes/linux/tabbrowser/tab-background-start@2x.png
+++ /dev/null
diff --git a/browser/themes/linux/tabbrowser/tab-stroke-end.png b/browser/themes/linux/tabbrowser/tab-stroke-end.png
deleted file mode 100644
index 2aa5711f8..000000000
--- a/browser/themes/linux/tabbrowser/tab-stroke-end.png
+++ /dev/null
diff --git a/browser/themes/linux/tabbrowser/tab-stroke-end@2x.png b/browser/themes/linux/tabbrowser/tab-stroke-end@2x.png
deleted file mode 100644
index a87002a83..000000000
--- a/browser/themes/linux/tabbrowser/tab-stroke-end@2x.png
+++ /dev/null
diff --git a/browser/themes/linux/tabbrowser/tab-stroke-start.png b/browser/themes/linux/tabbrowser/tab-stroke-start.png
deleted file mode 100644
index 4e4e41f63..000000000
--- a/browser/themes/linux/tabbrowser/tab-stroke-start.png
+++ /dev/null
diff --git a/browser/themes/linux/tabbrowser/tab-stroke-start@2x.png b/browser/themes/linux/tabbrowser/tab-stroke-start@2x.png
deleted file mode 100644
index 13bd6add1..000000000
--- a/browser/themes/linux/tabbrowser/tab-stroke-start@2x.png
+++ /dev/null
diff --git a/browser/themes/linux/tabbrowser/tabDragIndicator.png b/browser/themes/linux/tabbrowser/tabDragIndicator.png
deleted file mode 100644
index df7d914f8..000000000
--- a/browser/themes/linux/tabbrowser/tabDragIndicator.png
+++ /dev/null
diff --git a/browser/themes/linux/webRTC-indicator.css b/browser/themes/linux/webRTC-indicator.css
deleted file mode 100644
index c22f942ec..000000000
--- a/browser/themes/linux/webRTC-indicator.css
+++ /dev/null
@@ -1,116 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-window {
-  border: 1px solid #ff9500;
-}
-
-#audioVideoButton,
-#screenShareButton,
-#firefoxButton {
-  height: 29px;
-  margin: 0;
-  -moz-appearance: none;
-  border-style: none;
-}
-
-#firefoxButton {
-  background-image: url("chrome://branding/content/icon48.png");
-  background-repeat: no-repeat;
-  background-size: 22px;
-  background-position: center center;
-  min-width: 29px;
-  background-color: white;
-}
-
-#firefoxButton:hover {
-  background-color: #f2f2f2;
-}
-
-#screenShareButton {
-  background-image: url("webRTC-screen-white-16.png");
-  background-position: center center;
-  background-repeat: no-repeat;
-  background-size: 16px;
-  min-width: 27px;
-  display: none;
-}
-
-window[sharingscreen] > #screenShareButton {
-  display: -moz-box;
-}
-
-#audioVideoButton {
-  display: none;
-  background-repeat: no-repeat;
-}
-
-/* When screen sharing, need to pull in the separator: */
-window[sharingscreen] > #audioVideoButton {
-  margin-right: -1px;
-}
-
-/* Single icon button: */
-window[sharingvideo] > #audioVideoButton,
-window[sharingaudio] > #audioVideoButton {
-  display: -moz-box;
-  background-position: center center;
-  background-size: 16px;
-  min-width: 26px;
-}
-
-window[sharingvideo] > #audioVideoButton {
-  background-image: url("webRTC-camera-white-16.png");
-}
-
-window[sharingaudio] > #audioVideoButton {
-  background-image: url("webRTC-microphone-white-16.png");
-}
-
-/* Multi-icon button: */
-window[sharingaudio][sharingvideo] > #audioVideoButton {
-  background-image: url("webRTC-camera-white-16.png"),
-                    url("webRTC-microphone-white-16.png");
-  background-position: 6px center, 26px center;
-  background-size: 16px, 16px;
-  min-width: 46px;
-}
-
-/* Hover styles */
-#audioVideoButton,
-#screenShareButton {
-  background-color: #ffaa33;
-}
-
-#audioVideoButton:hover,
-#screenShareButton:hover {
-  background-color: #ff9500;
-}
-
-/* Don't show the dropmarker for the type="menu" case */
-#audioVideoButton > .box-inherit > .button-menu-dropmarker,
-#screenShareButton > .box-inherit > .button-menu-dropmarker {
-  display: none;
-}
-
-/* Separator in case of screen sharing + video/audio sharing */
-#shareSeparator {
-  width: 1px;
-  margin: 4px -1px 4px 0;
-  background-color: #FFCA80;
-  /* Separator needs to show above either button when they're hovered: */
-  position: relative;
-  z-index: 1;
-  display: none;
-}
-
-window[sharingscreen][sharingvideo] > #shareSeparator,
-window[sharingscreen][sharingaudio] > #shareSeparator {
-  display: -moz-box;
-}
-
-:-moz-any(#audioVideoButton, #screenShareButton,
-          #firefoxButton):-moz-focusring > .button-box {
-  border: none;
-}
diff --git a/browser/themes/moz.build b/browser/themes/moz.build
deleted file mode 100644
index 843567b00..000000000
--- a/browser/themes/moz.build
+++ /dev/null
@@ -1,16 +0,0 @@
-# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
-# vim: set filetype=python:
-# This Source Code Form is subject to the terms of the Mozilla Public
-# License, v. 2.0. If a copy of the MPL was not distributed with this
-# file, You can obtain one at http://mozilla.org/MPL/2.0/.
-
-toolkit = CONFIG['MOZ_WIDGET_TOOLKIT']
-
-if toolkit == 'cocoa':
-    DIRS += ['osx']
-elif toolkit in ('gtk2', 'gtk3'):
-    DIRS += ['linux']
-else:
-    DIRS += ['windows']
-
-FINAL_TARGET_FILES.extensions['{972ce4c6-7e08-4474-a285-3208198ce6fd}'] += ['shared/icon.png']
diff --git a/browser/themes/osx/Info.png b/browser/themes/osx/Info.png
deleted file mode 100644
index 7dd795ac9..000000000
--- a/browser/themes/osx/Info.png
+++ /dev/null
diff --git a/browser/themes/osx/Privacy-16.png b/browser/themes/osx/Privacy-16.png
deleted file mode 100644
index 5291abce4..000000000
--- a/browser/themes/osx/Privacy-16.png
+++ /dev/null
diff --git a/browser/themes/osx/Toolbar-background-noise.png b/browser/themes/osx/Toolbar-background-noise.png
deleted file mode 100644
index aab0a02c8..000000000
--- a/browser/themes/osx/Toolbar-background-noise.png
+++ /dev/null
diff --git a/browser/themes/osx/Toolbar-inverted.png b/browser/themes/osx/Toolbar-inverted.png
deleted file mode 100644
index 60f001ffa..000000000
--- a/browser/themes/osx/Toolbar-inverted.png
+++ /dev/null
diff --git a/browser/themes/osx/Toolbar-inverted@2x.png b/browser/themes/osx/Toolbar-inverted@2x.png
deleted file mode 100644
index 511470b21..000000000
--- a/browser/themes/osx/Toolbar-inverted@2x.png
+++ /dev/null
diff --git a/browser/themes/osx/Toolbar-yosemite.png b/browser/themes/osx/Toolbar-yosemite.png
deleted file mode 100644
index 05594f2f5..000000000
--- a/browser/themes/osx/Toolbar-yosemite.png
+++ /dev/null
diff --git a/browser/themes/osx/Toolbar-yosemite@2x.png b/browser/themes/osx/Toolbar-yosemite@2x.png
deleted file mode 100644
index 369e2385b..000000000
--- a/browser/themes/osx/Toolbar-yosemite@2x.png
+++ /dev/null
diff --git a/browser/themes/osx/Toolbar.png b/browser/themes/osx/Toolbar.png
deleted file mode 100644
index 45d616d94..000000000
--- a/browser/themes/osx/Toolbar.png
+++ /dev/null
diff --git a/browser/themes/osx/Toolbar@2x.png b/browser/themes/osx/Toolbar@2x.png
deleted file mode 100644
index 25ab9feba..000000000
--- a/browser/themes/osx/Toolbar@2x.png
+++ /dev/null
diff --git a/browser/themes/osx/aboutSessionRestore-window-icon.png b/browser/themes/osx/aboutSessionRestore-window-icon.png
deleted file mode 100644
index 02dc44208..000000000
--- a/browser/themes/osx/aboutSessionRestore-window-icon.png
+++ /dev/null
diff --git a/browser/themes/osx/aboutSyncTabs.css b/browser/themes/osx/aboutSyncTabs.css
deleted file mode 100644
index 4cedad649..000000000
--- a/browser/themes/osx/aboutSyncTabs.css
+++ /dev/null
@@ -1,101 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-#tabs-display,
-#tabsList {
-  background-color: transparent;
-  -moz-appearance: none;
-  margin: 0;
-}
-
-#tabsList {
-  width: 100%;
-}
-
-#tabs-display {
-  background: #fff url(chrome://browser/skin/sync-bg.png) repeat-x center -80px;
-}
-
-#headers {
-  background: url(chrome://browser/skin/sync-32.png) no-repeat;
-  margin-top: 4px;
-  width: 45em;
-  height: 32px;
-  margin-inline-start: 2em;
-  margin-inline-end: 2em;
-}
-
-#tabsListHeading {
-  font-size: 140%;
-  font-weight: bold;
-  margin-inline-start: 40px;
-}
-
-richlistitem {
-  margin-inline-end: 2em;
-}
-
-richlistitem[selected="true"],
-richlistitem:focus {
-  outline-style: none;
-}
-
-richlistitem[type="tab"] {
-  min-height: 3em;
-  border: #999999 1px solid !important;
-  padding: 2px 5px;
-  margin-bottom: 4px;
-  margin-inline-start: 4em;
-  border-radius: 6px;
-  background-color: menu;
-  width: 44em;
-  opacity: 0.9;
-  box-shadow:
-    inset rgba(255, 255, 255, 0.5) 0 1px 0px,
-    inset rgba(0, 0, 0, 0.1) 0 -2px 0px,
-    rgba(0, 0, 0, 0.1) 0px 1px 0px;
-}
-
-richlistitem[type="tab"][selected="true"] {
-  background-color: -moz-MenuHover;
-}
-
-richlistitem[type="client"] {
-  min-height: 2em;
-  color: #000000;
-  margin-inline-start: 2em;
-  margin-top: 2px;
-  margin-bottom: 3px;
-  width: 42em;
-  border-radius: 6px;
-  background-color: transparent;
-  -moz-user-focus: ignore !important;
-}
-richlistitem.mobile[type="client"] {
-  list-style-image: url("chrome://browser/skin/sync-mobileIcon.svg#icon");
-}
-richlistitem.desktop[type="client"] {
-  list-style-image: url("chrome://browser/skin/sync-desktopIcon.svg#icon");
-}
-
-.title,
-.clientName {
-  color: #000000;
-  font-size: 1.1em;
-}
-
-.title[selected="true"],
-.url[selected="true"] {
-  color: inherit;
-}
-
-.url {
-  color: -moz-nativehyperlinktext;
-  font-size: 0.95em;
-}
-
-.tabIcon {
-  padding-inline-start: 2px;
-  padding-top: 2px;
-}
diff --git a/browser/themes/osx/actionicon-tab.png b/browser/themes/osx/actionicon-tab.png
deleted file mode 100644
index ab7861313..000000000
--- a/browser/themes/osx/actionicon-tab.png
+++ /dev/null
diff --git a/browser/themes/osx/actionicon-tab@2x.png b/browser/themes/osx/actionicon-tab@2x.png
deleted file mode 100644
index f53fdda57..000000000
--- a/browser/themes/osx/actionicon-tab@2x.png
+++ /dev/null
diff --git a/browser/themes/osx/browser-lightweightTheme.css b/browser/themes/osx/browser-lightweightTheme.css
deleted file mode 100644
index aeae9d925..000000000
--- a/browser/themes/osx/browser-lightweightTheme.css
+++ /dev/null
@@ -1,38 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-%include shared.inc
-
-/*
- * LightweightThemeListener will append the current lightweight theme's header
- * image to the background-image for each of the following rulesets.
- */
-
-/* Lightweight theme on tabs */
-#tabbrowser-tabs:not([movingtab]) > .tabbrowser-tab > .tab-stack > .tab-background > .tab-background-start[selected=true]:-moz-lwtheme::before,
-#tabbrowser-tabs:not([movingtab]) > .tabbrowser-tab > .tab-stack > .tab-background > .tab-background-end[selected=true]:-moz-lwtheme::before {
-  background-attachment: scroll, fixed;
-  background-color: transparent;
-  background-image: @fgTabTextureLWT@;/*, lwtHeader;*/
-  background-position: 0 0, right top;
-  background-repeat: repeat-x, no-repeat;
-}
-
-#tabbrowser-tabs:not([movingtab]) > .tabbrowser-tab > .tab-stack > .tab-background > .tab-background-middle[selected=true]:-moz-lwtheme {
-  background-attachment: scroll, scroll, fixed;
-  background-color: transparent;
-  background-image: url(chrome://browser/skin/tabbrowser/tab-active-middle.png),
-                    @fgTabTextureLWT@;/*,
-                    lwtHeader;*/
-  background-position: 0 0, 0 0, right top;
-  background-repeat: repeat-x, repeat-x, no-repeat;
-}
-
-@media (min-resolution: 2dppx) {
-  #tabbrowser-tabs:not([movingtab]) > .tabbrowser-tab > .tab-stack > .tab-background > .tab-background-middle[selected=true]:-moz-lwtheme {
-    background-image: url(chrome://browser/skin/tabbrowser/tab-active-middle@2x.png),
-                      @fgTabTextureLWT@;/*,
-                      lwtHeader;*/
-  }
-}
diff --git a/browser/themes/osx/browser.css b/browser/themes/osx/browser.css
deleted file mode 100644
index b8d567a59..000000000
--- a/browser/themes/osx/browser.css
+++ /dev/null
@@ -1,3282 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-@import url("chrome://global/skin/");
-
-%include shared.inc
-%filter substitution
-%define forwardTransitionLength 150ms
-%define conditionalForwardWithUrlbar window:not([chromehidden~="toolbar"]) #urlbar-wrapper
-%define toolbarButtonPressed :hover:active:not([disabled="true"]):not([cui-areatype="menu-panel"])
-%define windowButtonMarginTop 11px
-
-@namespace url("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul");
-@namespace html url("http://www.w3.org/1999/xhtml");
-@namespace svg url("http://www.w3.org/2000/svg");
-
-:root {
-  --space-above-tabbar: 9px;
-  --tabs-toolbar-color: #333;
-
-  --backbutton-urlbar-overlap: 6px;
-  /* icon width + border + horizontal padding (without the overlap from backbutton-urlbar-overlap) */
-  --forwardbutton-width: 26px;
-
-  --toolbarbutton-hover-background: hsla(0,0%,100%,.1) linear-gradient(hsla(0,0%,100%,.3), hsla(0,0%,100%,.1)) padding-box;
-  --toolbarbutton-hover-bordercolor: hsla(0,0%,0%,.2);
-  --toolbarbutton-hover-boxshadow: 0 1px 0 hsla(0,0%,100%,.5),
-                                   0 1px 0 hsla(0,0%,100%,.5) inset;
-
-  --toolbarbutton-active-background: hsla(0,0%,0%,.02) linear-gradient(hsla(0,0%,0%,.12), transparent) border-box;
-  --toolbarbutton-active-bordercolor: hsla(0,0%,0%,.3);
-  --toolbarbutton-active-boxshadow: 0 1px 0 hsla(0,0%,100%,.5),
-                                    0 1px 0 hsla(0,0%,0%,.05) inset,
-                                    0 1px 1px hsla(0,0%,0%,.2) inset;
-
-  --toolbarbutton-checkedhover-backgroundcolor: hsla(0,0%,0%,.09);
-
-  --urlbar-dropmarker-url: url("chrome://browser/skin/urlbar-history-dropmarker.png");
-  --urlbar-dropmarker-region: rect(0, 11px, 14px, 0);
-  --urlbar-dropmarker-active-region: rect(0, 22px, 14px, 11px);
-  --urlbar-dropmarker-2x-url: url("chrome://browser/skin/urlbar-history-dropmarker@2x.png");
-  --urlbar-dropmarker-2x-region: rect(0, 22px, 28px, 0);
-  --urlbar-dropmarker-active-2x-region: rect(0, 44px, 28px, 22px);
-
-  --panel-separator-color: hsla(210,4%,10%,.14);
-  --arrowpanel-dimmed: hsla(210,4%,10%,.07);
-  --arrowpanel-dimmed-further: hsla(210,4%,10%,.12);
-  --arrowpanel-dimmed-even-further: hsla(210,4%,10%,.17);
-
-  --urlbar-separator-color: hsla(0,0%,16%,.2);
-}
-
-#urlbar:-moz-lwtheme:not([focused="true"]),
-.searchbar-textbox:-moz-lwtheme:not([focused="true"]) {
-  opacity: .9;
-}
-
-#navigator-toolbox::after {
-  -moz-box-ordinal-group: 101; /* tabs toolbar is 100 */
-  content: "";
-  display: -moz-box;
-  border-top: 1px solid hsla(0,0%,100%,.15);
-  border-bottom: 1px solid hsla(0,0%,0%,.15);
-  margin-top: -2px;
-  position: relative;
-  z-index: 2; /* navbar is at 1 */
-}
-
-@media (-moz-mac-yosemite-theme) {
-  #navigator-toolbox:-moz-window-inactive::after {
-    border-top-style: none;
-    border-bottom-color: hsla(0,0%,0%,.1);
-    margin-top: -1px;
-  }
-}
-
-#navigator-toolbox toolbarbutton:-moz-lwtheme {
-  color: inherit;
-  text-shadow: inherit;
-}
-
-#main-window {
-  -moz-appearance: none;
-  background-color: #eeeeee;
-}
-
-/** Begin titlebar **/
-
-#titlebar-buttonbox > .titlebar-button {
-  display: none;
-}
-
-/* NB: these would be margin-inline-start/end if it wasn't for the fact that OS X
- * doesn't reverse the order of the items in the titlebar in RTL mode. */
-.titlebar-placeholder[type="caption-buttons"],
-#titlebar-buttonbox {
-  margin-left: 7px;
-}
-
-.titlebar-placeholder[type="fullscreen-button"],
-#titlebar-secondary-buttonbox {
-  margin-right: 7px;
-  margin-left: 7px;
-}
-
-#main-window:not(:-moz-lwtheme) > #titlebar {
-  -moz-appearance: -moz-window-titlebar;
-}
-
-#main-window:not([tabsintitlebar]) > #titlebar {
-  height: 22px; /* The native titlebar on OS X is 22px tall. */
-}
-
-/**
- * For tabs in titlebar on OS X, we stretch the titlebar down so that the
- * tabstrip can overlap it.
- */
-#main-window[tabsintitlebar] > #titlebar {
-  min-height: calc(var(--tab-min-height) + var(--space-above-tabbar) - var(--tab-toolbar-navbar-overlap));
-}
-
-/**
- * We also vertically center the window buttons.
- */
-#titlebar-buttonbox-container {
-  -moz-box-align: start;
-}
-
-#main-window[tabsintitlebar] > #titlebar > #titlebar-content > #titlebar-buttonbox-container,
-#main-window[tabsintitlebar] > #titlebar > #titlebar-content > #titlebar-secondary-buttonbox > #titlebar-fullscreen-button {
-  margin-top: @windowButtonMarginTop@;
-}
-
-#main-window:not([tabsintitlebar]) > #titlebar > #titlebar-content > #titlebar-buttonbox-container,
-#main-window:not([tabsintitlebar]) > #titlebar > #titlebar-content > #titlebar-secondary-buttonbox > #titlebar-fullscreen-button {
-  margin-top: 3px;
-}
-
-#main-window[customize-entered] > #titlebar {
-  -moz-appearance: none;
-}
-
-/** End titlebar **/
-
-#main-window[chromehidden~="toolbar"][chromehidden~="location"][chromehidden~="directories"] {
-  border-top: 1px solid rgba(0,0,0,0.65);
-}
-
-#navigator-toolbox > toolbar:not(#TabsToolbar):not(#nav-bar):not(:-moz-lwtheme) {
-  -moz-appearance: none;
-  background: url(chrome://browser/skin/Toolbar-background-noise.png) hsl(0,0%,83%);
-}
-
-/* remove noise texture on Yosemite */
-@media (-moz-mac-yosemite-theme) {
-  #navigator-toolbox > toolbar:not(#TabsToolbar):not(#nav-bar):not(:-moz-lwtheme) {
-    background-image: none;
-  }
-
-  #navigator-toolbox > toolbar:-moz-window-inactive:not(#TabsToolbar):not(#nav-bar):not(:-moz-lwtheme) {
-    background-color: hsl(0,0%,95%);
-  }
-}
-
-#navigator-toolbox > toolbar:not(#toolbar-menubar):not(#TabsToolbar):not(#nav-bar):not(#addon-bar) {
-  overflow: -moz-hidden-unscrollable;
-  max-height: 4em;
-  transition: min-height 170ms ease-out, max-height 170ms ease-out;
-}
-
-#navigator-toolbox > toolbar:not(#toolbar-menubar):not(#TabsToolbar):not(#nav-bar):not(#addon-bar)[collapsed=true] {
-  min-height: 0.1px;
-  max-height: 0;
-  transition: min-height 170ms ease-out, max-height 170ms ease-out, visibility 170ms linear;
-}
-
-#nav-bar {
-  -moz-appearance: none;
-  background: url(chrome://browser/skin/Toolbar-background-noise.png),
-              linear-gradient(hsl(0,0%,93%), hsl(0,0%,83%));
-  background-clip: border-box;
-  background-origin: border-box !important;
-
-  /* Move the noise texture out of the top 1px strip because that overlaps
-     with the tabbar and we don't want to repaint it when animating tabs.
-     The noise image is at least 100px high, so repeating it only horizontally
-     is enough. */
-  background-repeat: repeat-x, no-repeat;
-  background-position: 0 1px, 0 0;
-
-  box-shadow: inset 0 1px 0 hsla(0,0%,100%,.4);
-}
-
-@media (min-resolution: 2dppx) {
-  #nav-bar {
-    background-size: 100px 100px, auto;
-  }
-}
-
-/* remove noise texture on Yosemite */
-@media (-moz-mac-yosemite-theme) {
-  #nav-bar {
-    background: linear-gradient(hsl(0,0%,93%), hsl(0,0%,83%));
-  }
-
-  #nav-bar:-moz-window-inactive {
-    background: linear-gradient(hsl(0,0%,97%), hsl(0,0%,95%));
-  }
-}
-
-/* Draw the bottom border of the tabs toolbar when it's not using
-   -moz-appearance: toolbar. */
-#main-window:-moz-any([sizemode="fullscreen"],[customize-entered]) #TabsToolbar:not([collapsed="true"]) + #nav-bar,
-#main-window:not([tabsintitlebar]) #TabsToolbar:not([collapsed="true"]) + #nav-bar,
-#TabsToolbar:not([collapsed="true"]) + #nav-bar:-moz-lwtheme {
-  border-top: 1px solid hsla(0,0%,0%,.3);
-  background-clip: padding-box;
-  margin-top: calc(-1 * var(--navbar-tab-toolbar-highlight-overlap));
-  /* Position the toolbar above the bottom of background tabs */
-  position: relative;
-  z-index: 1;
-}
-
-/* Always draw a border on Yosemite to ensure the border is well-defined there
- * (the default border is too light). */
-@media (-moz-mac-yosemite-theme) {
-  #main-window[tabsintitlebar] #TabsToolbar:not([collapsed="true"]) + #nav-bar:not(:-moz-lwtheme) {
-    border-top: 1px solid hsla(0,0%,0%,.2);
-    background-clip: padding-box;
-    margin-top: calc(-1 * var(--navbar-tab-toolbar-highlight-overlap));
-    /* Position the toolbar above the bottom of background tabs */
-    position: relative;
-    z-index: 1;
-  }
-
-  #main-window[tabsintitlebar] #TabsToolbar:not([collapsed="true"]) + #nav-bar:-moz-window-inactive:not(:-moz-lwtheme) {
-    border-top-color: hsla(0,0%,0%,.05);
-  }
-}
-
-#nav-bar-customization-target {
-  padding: 4px;
-}
-
-#PersonalToolbar {
-  padding: 0 4px 4px;
-}
-
-#PersonalToolbar:not([collapsed=true]) {
-  /* 4px padding ^  plus 19px personal-bookmarks (see below) */
-  min-height: 23px;
-}
-
-#navigator-toolbox > toolbar:not(#TabsToolbar):-moz-lwtheme {
-  background-color: @toolbarColorLWT@;
-  background-image: url(chrome://browser/skin/Toolbar-background-noise.png);
-}
-
-#PersonalToolbar:not(:-moz-lwtheme):-moz-window-inactive,
-#nav-bar:not(:-moz-lwtheme):-moz-window-inactive {
-  background-color: -moz-mac-chrome-inactive;
-}
-
-/* ----- BOOKMARK TOOLBAR ----- */
-
-#personal-bookmarks {
-  min-height: 19px; /* 16px button height + 2px padding + 1px margin-bottom */
-}
-
-#nav-bar-customization-target > #wrapper-personal-bookmarks > #personal-bookmarks {
-  min-height: 32px;
-  -moz-box-align: center;
-}
-
-toolbarbutton.chevron {
-  list-style-image: url("chrome://global/skin/icons/chevron.png");
-  margin: 1px 0 0;
-  padding: 0;
-}
-
-toolbar[brighttext] toolbarbutton.chevron {
-  list-style-image: url("chrome://global/skin/icons/chevron-inverted.png");
-}
-
-toolbarbutton.chevron > .toolbarbutton-text {
-  display: none;
-}
-
-toolbarbutton.chevron:-moz-locale-dir(rtl) > .toolbarbutton-icon {
-  transform: scaleX(-1);
-}
-
-@media (min-resolution: 2dppx) {
-  toolbarbutton.chevron {
-    list-style-image: url("chrome://global/skin/icons/chevron@2x.png");
-  }
-
-  toolbar[brighttext] toolbarbutton.chevron {
-    list-style-image: url("chrome://global/skin/icons/chevron-inverted@2x.png");
-  }
-
-  toolbarbutton.chevron > .toolbarbutton-icon {
-    width: 13px;
-  }
-}
-
-/* ----- BOOKMARK BUTTONS ----- */
-
-toolbarbutton.bookmark-item:not(.subviewbutton),
-#personal-bookmarks[cui-areatype="toolbar"]:not([overflowedItem=true]) > #bookmarks-toolbar-placeholder {
-  border: 0;
-  border-radius: 10000px;
-  padding: 1px 8px;
-  margin: 0 0 1px;
-}
-
-#personal-bookmarks[cui-areatype="toolbar"]:not([overflowedItem=true]) > #bookmarks-toolbar-placeholder {
-  -moz-box-orient: horizontal;
-}
-
-.bookmark-item > .toolbarbutton-menu-dropmarker {
-  list-style-image: url("chrome://browser/skin/places/folderDropArrow.png");
-  -moz-image-region: rect(0, 7px, 5px, 0);
-  margin-top: 1px;
-  margin-inline-start: 3px;
-  margin-inline-end: -2px;
-}
-
-@media (min-resolution: 2dppx) {
-  .bookmark-item > .toolbarbutton-menu-dropmarker {
-    list-style-image: url("chrome://browser/skin/places/folderDropArrow@2x.png");
-    -moz-image-region: rect(0, 14px, 10px, 0);
-  }
-
-  .bookmark-item > .toolbarbutton-menu-dropmarker > .dropmarker-icon {
-    width: 7px;
-  }
-}
-
-.bookmark-item > .toolbarbutton-text,
-#personal-bookmarks[cui-areatype="toolbar"] > #bookmarks-toolbar-placeholder > .toolbarbutton-text {
-  display: -moz-box !important; /* Force the display of the label for bookmarks */
-}
-
-toolbarbutton.bookmark-item:not(.subviewbutton):hover {
-  background-color: rgba(0, 0, 0, .205);
-}
-
-toolbarbutton.bookmark-item:hover:not(.subviewbutton),
-toolbarbutton.bookmark-item[open="true"]:not(.subviewbutton) {
-  color: #FFF !important;
-  text-shadow: 0 1px rgba(0, 0, 0, .4) !important;
-}
-
-.bookmark-item:hover > .toolbarbutton-menu-dropmarker,
-.bookmark-item[open="true"] > .toolbarbutton-menu-dropmarker {
-  -moz-image-region: rect(5px, 7px, 10px, 0);
-}
-
-@media (min-resolution: 2dppx) {
-  .bookmark-item:hover > .toolbarbutton-menu-dropmarker,
-  .bookmark-item[open="true"] > .toolbarbutton-menu-dropmarker {
-    -moz-image-region: rect(10px, 14px, 20px, 0);
-  }
-}
-
-toolbarbutton.bookmark-item:not(.subviewbutton):active:hover,
-toolbarbutton.bookmark-item:not(.subviewbutton)[open="true"] {
-  box-shadow: inset 0 1px 1px rgba(0, 0, 0, 0.4), 0 1px rgba(255, 255, 255, 0.4);
-  background-color: rgba(0, 0, 0, .5);
-}
-
-toolbarbutton.bookmark-item > menupopup {
-  margin-inline-start: 3px;
-}
-
-.bookmark-item > .toolbarbutton-icon,
-#personal-bookmarks[cui-areatype="toolbar"] > #bookmarks-toolbar-placeholder > .toolbarbutton-icon {
-  width: 16px;
-  min-height: 16px;
-  max-height: 16px;
-}
-
-.bookmark-item > .toolbarbutton-icon[label]:not([label=""]),
-.bookmark-item > .toolbarbutton-icon[type="menu"] {
-  margin-inline-end: 5px;
-}
-
-.bookmark-item[container] {
-  list-style-image: url("chrome://global/skin/tree/folder.png");
-}
-
-.bookmark-item[container][livemark] {
-  list-style-image: url("chrome://browser/skin/page-livemarks.png");
-}
-
-.bookmark-item[container][livemark] .bookmark-item {
-  list-style-image: url("chrome://browser/skin/places/livemark-item.png");
-  -moz-image-region: rect(0px, 16px, 16px, 0px);
-}
-
-.bookmark-item[container][livemark] .bookmark-item[visited] {
-  -moz-image-region: rect(0px, 32px, 16px, 16px);
-}
-
-.bookmark-item[container][query] {
-  list-style-image: url("chrome://browser/skin/places/query.png");
-}
-
-.bookmark-item[query][tagContainer] {
-  list-style-image: url("chrome://browser/skin/places/tag.png");
-}
-
-.bookmark-item[query][dayContainer] {
-  list-style-image: url("chrome://browser/skin/places/history.png");
-}
-
-.bookmark-item[query][hostContainer] {
-  list-style-image: url("chrome://global/skin/tree/folder.png");
-}
-
-.bookmark-item[query][hostContainer][open] {
-  list-style-image: url("chrome://global/skin/tree/folder.png");
-}
-
-@media (min-resolution: 2dppx) {
-  .bookmark-item[container] {
-    list-style-image: url("chrome://global/skin/tree/folder@2x.png");
-  }
-
-  .bookmark-item[container][livemark] {
-    list-style-image: url("chrome://browser/skin/page-livemarks@2x.png");
-  }
-
-  .bookmark-item[container][livemark] .bookmark-item {
-    list-style-image: url("chrome://browser/skin/places/livemark-item.png");
-  }
-
-  .bookmark-item[container][query] {
-    list-style-image: url("chrome://browser/skin/places/query@2x.png");
-  }
-
-  .bookmark-item[query][tagContainer] {
-    list-style-image: url("chrome://browser/skin/places/tag@2x.png");
-  }
-
-  .bookmark-item[query][dayContainer] {
-    list-style-image: url("chrome://browser/skin/places/history@2x.png");
-  }
-
-  .bookmark-item[query][hostContainer] {
-    list-style-image: url("chrome://global/skin/tree/folder@2x.png");
-  }
-
-  .bookmark-item[query][hostContainer][open] {
-    list-style-image: url("chrome://global/skin/tree/folder@2x.png");
-  }
-}
-
-/* Workaround for native menubar inheritance */
-.openintabs-menuitem,
-.openlivemarksite-menuitem,
-.livemarkstatus-menuitem {
-  list-style-image: none;
-}
-
-.bookmark-item[cutting] > .toolbarbutton-icon,
-.bookmark-item[cutting] > .menu-iconic-left > .menu-iconic-icon {
-  opacity: 0.5;
-}
-
-.bookmark-item[cutting] > .toolbarbutton-text,
-.bookmark-item[cutting] > .menu-iconic-left > .menu-iconic-text {
-  opacity: 0.7;
-}
-
-#bookmarks-toolbar-placeholder {
-  list-style-image: url("chrome://browser/skin/places/bookmarksToolbar.png") !important;
-}
-
-toolbarpaletteitem[place="palette"] > #personal-bookmarks > #bookmarks-toolbar-placeholder,
-#personal-bookmarks[cui-areatype="menu-panel"] > #bookmarks-toolbar-placeholder {
-  list-style-image: url("chrome://browser/skin/places/bookmarksToolbar-menuPanel.png") !important;
-}
-
-@media (min-resolution: 2dppx) {
-  #bookmarks-toolbar-placeholder {
-    list-style-image: url("chrome://browser/skin/places/bookmarksToolbar@2x.png") !important;
-  }
-
-  toolbarpaletteitem[place="palette"] > #personal-bookmarks > #bookmarks-toolbar-placeholder,
-  #personal-bookmarks[cui-areatype="menu-panel"] > #bookmarks-toolbar-placeholder {
-    list-style-image: url("chrome://browser/skin/places/bookmarksToolbar-menuPanel@2x.png") !important;
-  }
-
-  #bookmarks-toolbar-placeholder > .toolbarbutton-icon {
-    width: 16px;
-  }
-}
-
-/* ----- BOOKMARK STAR ANIMATION ----- */
-
-@keyframes animation-bookmarkAdded {
-  from { transform: rotate(0deg) translateX(-14px) rotate(0deg) scale(1); opacity: 0; }
-  60%  { transform: rotate(180deg) translateX(-14px) rotate(-180deg) scale(2.2); opacity: 1; }
-  80%  { opacity: 1; }
-  to   { transform: rotate(180deg) translateX(-14px) rotate(-180deg) scale(1); opacity: 0; }
-}
-
-@keyframes animation-bookmarkPulse {
-  from { transform: scale(1); }
-  50%  { transform: scale(1.3); }
-  to   { transform: scale(1); }
-}
-
-#bookmarked-notification-container {
-  min-height: 1px;
-  min-width: 1px;
-  height: 1px;
-  margin-bottom: -1px;
-  z-index: 5;
-  position: relative;
-}
-
-#bookmarked-notification {
-  background-size: 16px;
-  background-position: center;
-  background-repeat: no-repeat;
-  width: 16px;
-  height: 16px;
-  opacity: 0;
-}
-
-#bookmarked-notification-dropmarker-anchor {
-  z-index: -1;
-  position: relative;
-}
-
-#bookmarked-notification-dropmarker-icon {
-  width: 18px;
-  height: 18px;
-  visibility: hidden;
-}
-
-#bookmarked-notification-anchor[notification="finish"] > #bookmarked-notification {
-  background-image: url("chrome://browser/skin/places/bookmarks-notification-finish.png");
-  animation: animation-bookmarkAdded 800ms;
-  animation-timing-function: ease, ease, ease;
-}
-
-@media (min-resolution: 2dppx) {
-  #bookmarked-notification-anchor[notification="finish"] > #bookmarked-notification {
-    background-image: url("chrome://browser/skin/places/bookmarks-notification-finish@2x.png");
-  }
-}
-
-#bookmarks-menu-button[notification="finish"] > .toolbarbutton-menubutton-dropmarker > .dropmarker-icon {
-  list-style-image: none !important;
-}
-
-#bookmarked-notification-dropmarker-anchor[notification="finish"] > #bookmarked-notification-dropmarker-icon {
-  visibility: visible;
-  animation: animation-bookmarkPulse 300ms;
-  animation-delay: 600ms;
-  animation-timing-function: ease-out;
-}
-
-/* ----- BOOKMARK MENUS ----- */
-
-.bookmark-item > .menu-iconic-left > .menu-iconic-icon {
-  width: 16px;
-  height: 16px;
-}
-
-#bookmarksToolbarFolderMenu,
-#BMB_bookmarksToolbar,
-#panelMenu_bookmarksToolbar {
-  list-style-image: url("chrome://browser/skin/places/bookmarksToolbar.png");
-}
-
-#menu_unsortedBookmarks,
-#BMB_unsortedBookmarks,
-#panelMenu_unsortedBookmarks {
-  list-style-image: url("chrome://browser/skin/places/unfiledBookmarks.png");
-}
-
-@media (min-resolution: 2dppx) {
-  #bookmarksToolbarFolderMenu,
-  #BMB_bookmarksToolbar {
-    list-style-image: url("chrome://browser/skin/places/bookmarksToolbar@2x.png");
-  }
-
-  #BMB_unsortedBookmarks {
-    list-style-image: url("chrome://browser/skin/places/unfiledBookmarks@2x.png");
-  }
-}
-
-/* ----- PRIMARY TOOLBAR BUTTONS ----- */
-
-:-moz-any(toolbar, .widget-overflow-list) .toolbarbutton-1 > .toolbarbutton-icon,
-:-moz-any(toolbar, .widget-overflow-list) .toolbarbutton-1 > :-moz-any(.toolbarbutton-menubutton-button, .toolbarbutton-badge-stack) > .toolbarbutton-icon {
-  max-width: 16px;
-  margin: 1px;
-}
-
-:-moz-any(toolbar, .widget-overflow-list) .toolbarbutton-1:-moz-any(@primaryToolbarButtons@, .toolbarbutton-legacy-addon) > .toolbarbutton-icon,
-:-moz-any(toolbar, .widget-overflow-list) .toolbarbutton-1:-moz-any(@primaryToolbarButtons@, .toolbarbutton-legacy-addon) > :-moz-any(.toolbarbutton-menubutton-button, .toolbarbutton-badge-stack) > .toolbarbutton-icon {
-  max-width: 18px;
-  margin: 0;
-}
-
-toolbar .toolbarbutton-1:not([type="menu-button"]),
-.toolbarbutton-1 > .toolbarbutton-menubutton-button,
-.toolbarbutton-1 > .toolbarbutton-menubutton-dropmarker {
-  -moz-box-orient: vertical;
-  height: 24px;
-  padding: 0;
-  border: 0;
-}
-
-.findbar-button,
-toolbar .toolbarbutton-1:not(:-moz-any([type="menu-button"],#back-button,#forward-button)),
-toolbar .toolbarbutton-1 > .toolbarbutton-menubutton-button,
-toolbar .toolbarbutton-1 > .toolbarbutton-menubutton-dropmarker {
-  border: 1px solid transparent;
-  border-radius: @toolbarbuttonCornerRadius@;
-  transition-property: background, border-color;
-  transition-duration: 250ms;
-}
-
-.findbar-button {
-  background: none;
-  box-shadow: none;
-}
-
-toolbar .toolbarbutton-1:not(:-moz-any([type="menu-button"],#back-button,#forward-button)) {
-  padding: 0 4px;
-}
-
-.findbar-button:not(:-moz-any([checked="true"],[disabled="true"])):hover,
-toolbar .toolbarbutton-1:not(:-moz-any([type="menu-button"],[disabled],[open],#back-button,#forward-button)):hover,
-toolbar .toolbarbutton-1[type="menu-button"]:not([disabled]) > .toolbarbutton-menubutton-button[open] + .toolbarbutton-menubutton-dropmarker,
-toolbar .toolbarbutton-1[type="menu-button"]:not([disabled]):-moz-any(:hover,[open]) > .toolbarbutton-menubutton-button,
-toolbar .toolbarbutton-1[type="menu-button"]:not([disabled]):-moz-any(:hover,[open]) > .toolbarbutton-menubutton-dropmarker,
-toolbar .toolbaritem-combined-buttons:hover > .toolbarbutton-combined {
-  border-color: var(--toolbarbutton-hover-bordercolor);
-  box-shadow: var(--toolbarbutton-hover-boxshadow);
-}
-
-.findbar-button:not(:-moz-any([checked="true"],[disabled="true"])):hover,
-toolbar .toolbarbutton-1:not(:-moz-any([type="menu-button"],[disabled],[open],#back-button,#forward-button)):hover,
-toolbar .toolbarbutton-1[type="menu-button"]:not(:-moz-any([disabled],[open]))[buttonover] > .toolbarbutton-menubutton-button,
-toolbar .toolbarbutton-1[type="menu-button"]:not(:-moz-any([disabled],[open],[buttonover])):hover > .toolbarbutton-menubutton-dropmarker {
-  background: var(--toolbarbutton-hover-background);
-}
-
-.findbar-button:not([disabled=true]):-moz-any([checked="true"],:hover:active),
-toolbar .toolbarbutton-1:not(:-moz-any([type="menu-button"],[disabled],#back-button,#forward-button)):-moz-any(:hover:active,[open],[checked]),
-toolbar .toolbarbutton-1[type="menu-button"]:not([disabled]) > .toolbarbutton-menubutton-button[open],
-toolbar .toolbarbutton-1[type="menu-button"]:not(:-moz-any([disabled],[open]))[buttonover]:active > .toolbarbutton-menubutton-button,
-toolbar .toolbarbutton-1[type="menu-button"]:not(:-moz-any([disabled],[open],[buttonover])):hover:active > .toolbarbutton-menubutton-dropmarker,
-toolbar .toolbarbutton-1[type="menu-button"][open]:not([disabled]) > .toolbarbutton-menubutton-dropmarker {
-  background: var(--toolbarbutton-active-background);
-  border-color: var(--toolbarbutton-active-bordercolor);
-  box-shadow: var(--toolbarbutton-active-boxshadow);
-  transition-duration: 10ms;
-}
-
-.findbar-button[checked="true"]:not(:active):hover,
-toolbar .toolbarbutton-1[checked]:not(:active):hover {
-  background-color: var(--toolbarbutton-checkedhover-backgroundcolor);
-  transition: background-color 250ms;
-}
-
-.toolbarbutton-1[type="menu-button"]:not([overflowedItem=true]) {
-  padding: 0;
-}
-
-toolbar .toolbarbutton-1[type="menu-button"] {
-  margin: 0;
-}
-
-.toolbarbutton-1 > .toolbarbutton-menubutton-button,
-.toolbarbutton-1 > .toolbarbutton-menubutton-dropmarker {
-  margin: 0;
-}
-
-.toolbarbutton-1 {
-  margin: 0 4px;
-}
-
-toolbar .toolbarbutton-1:not([type="menu-button"]) {
-  margin: 0 2px;
-}
-
-/**
- * Draw seperators before toolbar button dropmarkers, as well as between
- * consecutive toolbarbutton-1's within a toolbaritem.
- */
-toolbar .toolbaritem-combined-buttons:not(:hover) > separator,
-toolbar .toolbarbutton-1:not(:hover):not(:active):not([open]) > .toolbarbutton-menubutton-dropmarker::before {
-  content: "";
-  display: -moz-box;
-  width: 1px;
-  height: 18px;
-  margin-inline-start: -1px;
-  background-image: linear-gradient(currentColor 0, currentColor 100%);
-  background-position: center;
-  background-repeat: no-repeat;
-  background-size: 1px 18px;
-  opacity: .2;
-}
-
-toolbar[brighttext] .toolbaritem-combined-buttons > separator,
-toolbar[brighttext] .toolbarbutton-1:not(:hover):not(:active):not([open]) > .toolbarbutton-menubutton-dropmarker::before {
-  opacity: .3;
-}
-
-toolbar .toolbarbutton-1 > .toolbarbutton-menubutton-dropmarker {
-  -moz-box-orient: horizontal;
-}
-
-toolbar .toolbarbutton-1 > .toolbarbutton-menubutton-button > .toolbarbutton-icon,
-toolbar .toolbarbutton-1 > .toolbarbutton-menubutton-dropmarker > .dropmarker-icon {
-  margin: 0 4px;
-}
-
-#nav-bar .toolbarbutton-1:not(#back-button):not(#forward-button) {
-  margin-top: 4px;
-  margin-bottom: 4px;
-}
-
-#nav-bar #PanelUI-button {
-  -moz-box-align: center;
-}
-
-#nav-bar #PanelUI-menu-button {
-  margin-top: 0;
-  margin-bottom: 0;
-  padding-top: 1px;
-  padding-bottom: 1px;
-  margin-inline-start: 7px;
-  margin-inline-end: 7px;
-}
-
-%include ../shared/toolbarbuttons.inc.css
-%include ../shared/menupanel.inc.css
-
-@media not all and (min-resolution: 1.1dppx) {
-  #back-button:hover:active:not([disabled="true"]) {
-    -moz-image-region: rect(18px, 36px, 36px, 18px);
-  }
-
-  #forward-button:hover:active:not([disabled="true"]) {
-    -moz-image-region: rect(18px, 72px, 36px, 54px);
-  }
-
-  #home-button@toolbarButtonPressed@ {
-    -moz-image-region: rect(18px, 126px, 36px, 108px);
-  }
-
-  #bookmarks-menu-button[buttonover]@toolbarButtonPressed@ {
-    -moz-image-region: rect(18px, 144px, 36px, 126px);
-  }
-
-  #bookmarks-menu-button[starred][buttonover]@toolbarButtonPressed@ {
-    -moz-image-region: rect(18px, 162px, 36px, 144px);
-  }
-
-  #bookmarks-menu-button[cui-areatype="toolbar"] > .toolbarbutton-menubutton-dropmarker > .dropmarker-icon {
-    -moz-image-region: rect(0px, 630px, 18px, 612px);
-  }
-
-  #bookmarks-menu-button[cui-areatype="toolbar"] > .toolbarbutton-menubutton-dropmarker:hover:active:not([disabled="true"]) > .dropmarker-icon {
-    -moz-image-region: rect(18px, 630px, 36px, 612px);
-  }
-
-  #history-panelmenu@toolbarButtonPressed@ {
-    -moz-image-region: rect(18px, 180px, 36px, 162px);
-  }
-
-  #downloads-button@toolbarButtonPressed@ {
-    -moz-image-region: rect(18px, 198px, 36px, 180px);
-  }
-
-  #add-ons-button@toolbarButtonPressed@ {
-    -moz-image-region: rect(18px, 216px, 36px, 198px);
-  }
-
-  #open-file-button@toolbarButtonPressed@ {
-    -moz-image-region: rect(18px, 234px, 36px, 216px);
-  }
-
-  #save-page-button@toolbarButtonPressed@ {
-    -moz-image-region: rect(18px, 252px, 36px, 234px);
-  }
-
-  #sync-button@toolbarButtonPressed@ {
-    -moz-image-region: rect(18px, 792px, 36px, 774px);
-  }
-
-  #containers-panelmenu@toolbarButtonPressed@ {
-    -moz-image-region: rect(18px, 810px, 36px, 792px);
-  }
-
-  #feed-button@toolbarButtonPressed@ {
-    -moz-image-region: rect(18px, 288px, 36px, 270px);
-  }
-
-  #characterencoding-button@toolbarButtonPressed@ {
-    -moz-image-region: rect(18px, 324px, 36px, 306px);
-  }
-
-  #new-window-button@toolbarButtonPressed@ {
-    -moz-image-region: rect(18px, 342px, 36px, 324px);
-  }
-
-  #e10s-button@toolbarButtonPressed@ {
-    -moz-image-region: rect(18px, 342px, 36px, 324px);
-  }
-
-  #webide-button@toolbarButtonPressed@ {
-    -moz-image-region: rect(18px, 738px, 36px, 720px);
-  }
-
-  #new-tab-button@toolbarButtonPressed@ {
-    -moz-image-region: rect(18px, 360px, 36px, 342px);
-  }
-
-  #privatebrowsing-button@toolbarButtonPressed@ {
-    -moz-image-region: rect(18px, 378px, 36px, 360px);
-  }
-
-  #find-button@toolbarButtonPressed@ {
-    -moz-image-region: rect(18px, 396px, 36px, 378px);
-  }
-
-  #print-button@toolbarButtonPressed@ {
-    -moz-image-region: rect(18px, 414px, 36px, 396px);
-  }
-
-  #restore-button:hover:active:not([disabled="true"]),
-  #fullscreen-button@toolbarButtonPressed@ {
-    -moz-image-region: rect(18px, 432px, 36px, 414px);
-  }
-
-  #developer-button@toolbarButtonPressed@ {
-    -moz-image-region: rect(18px, 450px, 36px, 432px);
-  }
-
-  #preferences-button@toolbarButtonPressed@ {
-    -moz-image-region: rect(18px, 468px, 36px, 450px);
-  }
-
-  #PanelUI-menu-button@toolbarButtonPressed@ {
-    -moz-image-region: rect(18px, 486px, 36px, 468px);
-  }
-
-  #edit-controls[cui-areatype="toolbar"] > #cut-button:hover:active:not([disabled="true"]) {
-    -moz-image-region: rect(18px, 504px, 36px, 486px);
-  }
-
-  #edit-controls[cui-areatype="toolbar"] > #copy-button:hover:active:not([disabled="true"]) {
-    -moz-image-region: rect(18px, 522px, 36px, 504px);
-  }
-
-  #edit-controls[cui-areatype="toolbar"] > #paste-button:hover:active:not([disabled="true"]) {
-    -moz-image-region: rect(18px, 540px, 36px, 522px);
-  }
-
-  #zoom-controls[cui-areatype="toolbar"] > #zoom-out-button:hover:active:not([disabled="true"]) {
-    -moz-image-region: rect(18px, 558px, 36px, 540px);
-  }
-
-  #zoom-controls[cui-areatype="toolbar"] > #zoom-in-button:hover:active:not([disabled="true"]) {
-    -moz-image-region: rect(18px, 576px, 36px, 558px);
-  }
-
-  #nav-bar-overflow-button:hover:active:not([disabled="true"]) {
-    -moz-image-region: rect(18px, 612px, 36px, 594px);
-  }
-
-  #email-link-button@toolbarButtonPressed@ {
-    -moz-image-region: rect(18px, 666px, 36px, 648px);
-  }
-
-  #sidebar-button@toolbarButtonPressed@ {
-    -moz-image-region: rect(18px, 684px, 36px, 666px);
-  }
-
-  #panic-button@toolbarButtonPressed@ {
-    -moz-image-region: rect(18px, 702px, 36px, 684px);
-  }
-
-  /**
-   * OSX has a unique set of icons when fullscreen is in the checked state.
-   */
-
-  #fullscreen-button[checked="true"]:not([cui-areatype="menu-panel"]) {
-    -moz-image-region: rect(36px, 432px, 54px, 414px);
-  }
-
-  #fullscreen-button[checked="true"]@toolbarButtonPressed@ {
-    -moz-image-region: rect(54px, 432px, 72px, 414px);
-  }
-}
-
-@media (min-resolution: 1.1dppx) {
-  #back-button:hover:active:not([disabled="true"]) {
-    -moz-image-region: rect(36px, 72px, 72px, 36px);
-  }
-
-  #forward-button:hover:active:not([disabled="true"]) {
-    -moz-image-region: rect(36px, 144px, 72px, 108px);
-  }
-
-  #home-button@toolbarButtonPressed@ {
-    -moz-image-region: rect(36px, 252px, 72px, 216px);
-  }
-
-  #bookmarks-menu-button@toolbarButtonPressed@[buttonover] {
-    -moz-image-region: rect(36px, 288px, 72px, 252px);
-  }
-
-  #bookmarks-menu-button@toolbarButtonPressed@[starred][buttonover] {
-    -moz-image-region: rect(36px, 324px, 72px, 288px);
-  }
-
-  #bookmarks-menu-button[cui-areatype="toolbar"] > .toolbarbutton-menubutton-dropmarker:hover:active:not([disabled="true"]) > .dropmarker-icon {
-    -moz-image-region: rect(36px, 1260px, 72px, 1224px);
-  }
-
-  #history-panelmenu@toolbarButtonPressed@ {
-    -moz-image-region: rect(36px, 360px, 72px, 324px);
-  }
-
-  #downloads-button@toolbarButtonPressed@ {
-    -moz-image-region: rect(36px, 396px, 72px, 360px);
-  }
-
-  #add-ons-button@toolbarButtonPressed@ {
-    -moz-image-region: rect(36px, 432px, 72px, 396px);
-  }
-
-  #open-file-button@toolbarButtonPressed@ {
-    -moz-image-region: rect(36px, 468px, 72px, 432px);
-  }
-
-  #save-page-button@toolbarButtonPressed@ {
-    -moz-image-region: rect(36px, 504px, 72px, 468px);
-  }
-
-  #sync-button@toolbarButtonPressed@ {
-    -moz-image-region: rect(36px, 1584px, 72px, 1548px);
-  }
-
-  #containers-panelmenu@toolbarButtonPressed@ {
-    -moz-image-region: rect(36px, 1620px, 72px, 1584px);
-  }
-
-  #feed-button@toolbarButtonPressed@ {
-    -moz-image-region: rect(36px, 576px, 72px, 540px);
-  }
-
-  #characterencoding-button@toolbarButtonPressed@ {
-    -moz-image-region: rect(36px, 648px, 72px, 612px);
-  }
-
-  #new-window-button@toolbarButtonPressed@ {
-    -moz-image-region: rect(36px, 684px, 72px, 648px);
-  }
-
-  #e10s-button@toolbarButtonPressed@ {
-    -moz-image-region: rect(36px, 684px, 72px, 648px);
-  }
-
-  #e10s-button > .toolbarbutton-icon {
-    transform: scaleY(-1);
-  }
-
-  #webide-button@toolbarButtonPressed@ {
-    -moz-image-region: rect(36px, 1476px, 72px, 1440px);
-  }
-
-  #new-tab-button@toolbarButtonPressed@ {
-    -moz-image-region: rect(36px, 720px, 72px, 684px);
-  }
-
-  #privatebrowsing-button@toolbarButtonPressed@ {
-    -moz-image-region: rect(36px, 756px, 72px, 720px);
-  }
-
-  #find-button@toolbarButtonPressed@ {
-    -moz-image-region: rect(36px, 792px, 72px, 756px);
-  }
-
-  #print-button@toolbarButtonPressed@ {
-    -moz-image-region: rect(36px, 828px, 72px, 792px);
-  }
-
-  #restore-button:hover:active:not([disabled="true"]),
-  #fullscreen-button@toolbarButtonPressed@ {
-    -moz-image-region: rect(36px, 864px, 72px, 828px);
-  }
-
-  #fullscreen-button[cui-areatype="toolbar"][checked="true"] {
-    -moz-image-region: rect(72px, 864px, 108px, 828px);
-  }
-
-  #fullscreen-button@toolbarButtonPressed@[checked="true"] {
-    -moz-image-region: rect(108px, 864px, 144px, 828px);
-  }
-
-  #developer-button@toolbarButtonPressed@ {
-    -moz-image-region: rect(36px, 900px, 72px, 864px);
-  }
-
-  #preferences-button@toolbarButtonPressed@ {
-    -moz-image-region: rect(36px, 936px, 72px, 900px);
-  }
-
-  #PanelUI-menu-button:hover:active:not([disabled="true"]) {
-    -moz-image-region: rect(36px, 972px, 72px, 936px);
-  }
-
-  #edit-controls[cui-areatype="toolbar"] > #cut-button:hover:active:not([disabled="true"]) {
-    -moz-image-region: rect(36px, 1008px, 72px, 972px);
-  }
-
-  #edit-controls[cui-areatype="toolbar"] > #copy-button:hover:active:not([disabled="true"]) {
-    -moz-image-region: rect(36px, 1044px, 72px, 1008px);
-  }
-
-  #edit-controls[cui-areatype="toolbar"] > #paste-button:hover:active:not([disabled="true"]) {
-    -moz-image-region: rect(36px, 1080px, 72px, 1044px);
-  }
-
-  #zoom-controls[cui-areatype="toolbar"] > #zoom-out-button:hover:active:not([disabled="true"]) {
-    -moz-image-region: rect(36px, 1116px, 72px, 1080px);
-  }
-
-  #zoom-controls[cui-areatype="toolbar"] > #zoom-in-button:hover:active:not([disabled="true"]) {
-    -moz-image-region: rect(36px, 1152px, 72px, 1116px);
-  }
-
-  #nav-bar-overflow-button:hover:active:not([disabled="true"]) {
-    -moz-image-region: rect(36px, 1224px, 72px, 1188px);
-  }
-
-  #email-link-button@toolbarButtonPressed@ {
-    -moz-image-region: rect(36px, 1332px, 72px, 1296px);
-  }
-
-  #sidebar-button@toolbarButtonPressed@ {
-    -moz-image-region: rect(36px, 1368px, 72px, 1332px);
-  }
-
-  #panic-button@toolbarButtonPressed@ {
-    -moz-image-region: rect(36px, 1404px, 72px, 1368px);
-  }
-}
-
-toolbar .toolbarbutton-1:not([type="menu-button"]),
-toolbar .toolbarbutton-1 > .toolbarbutton-menubutton-button {
-  min-width: 28px;
-}
-
-#main-window:not([customizing]) .toolbarbutton-1[disabled="true"] > .toolbarbutton-icon,
-#main-window:not([customizing]) .toolbarbutton-1[disabled="true"] > .toolbarbutton-badge-stack > .toolbarbutton-icon,
-#main-window:not([customizing]) .toolbarbutton-1 > .toolbarbutton-menubutton-button[disabled="true"] > .toolbarbutton-icon,
-#main-window:not([customizing]) .toolbarbutton-1[disabled="true"] > .toolbarbutton-menu-dropmarker,
-#main-window:not([customizing]) .toolbarbutton-1[disabled="true"] > .toolbarbutton-menubutton-dropmarker,
-.toolbarbutton-1:not(:hover):-moz-window-inactive > #downloads-indicator-anchor,
-.toolbarbutton-1:not(:hover):-moz-window-inactive > .toolbarbutton-icon,
-.toolbarbutton-1:not(:hover):-moz-window-inactive > .toolbarbutton-text,
-.toolbarbutton-1:not(:hover):-moz-window-inactive > .toolbarbutton-badge-stack > .toolbarbutton-icon,
-.toolbarbutton-1:not(:hover):-moz-window-inactive > .toolbarbutton-menu-dropmarker,
-.toolbarbutton-1:not(:hover):-moz-window-inactive > .toolbarbutton-menubutton-dropmarker > .dropmarker-icon,
-.toolbarbutton-1:not(:hover):-moz-window-inactive > .toolbarbutton-menubutton-button > .toolbarbutton-icon {
-  opacity: .5;
-}
-
-#main-window:not([customizing]) .toolbarbutton-1:-moz-window-inactive[disabled="true"] > .toolbarbutton-icon,
-#main-window:not([customizing]) .toolbarbutton-1:-moz-window-inactive[disabled="true"] > .toolbarbutton-badge-stack > .toolbarbutton-icon,
-#main-window:not([customizing]) .toolbarbutton-1:-moz-window-inactive > .toolbarbutton-menubutton-button[disabled="true"] > .toolbarbutton-icon {
-  opacity: .25;
-}
-
-.toolbarbutton-1 > .toolbarbutton-menu-dropmarker,
-.toolbarbutton-1 > .toolbarbutton-menubutton-dropmarker {
-  list-style-image: url(chrome://browser/skin/toolbarbutton-dropmarker.png);
-}
-
-@media (min-resolution: 2dppx) {
-  .toolbarbutton-1 > .toolbarbutton-menu-dropmarker,
-  .toolbarbutton-1 > .toolbarbutton-menubutton-dropmarker {
-    list-style-image: url(chrome://browser/skin/toolbarbutton-dropmarker@2x.png);
-  }
-
-  .toolbarbutton-1 > .toolbarbutton-menu-dropmarker > .dropmarker-icon,
-  .toolbarbutton-1 > .toolbarbutton-menubutton-dropmarker > .dropmarker-icon {
-    width: 7px;
-  }
-}
-
-.toolbarbutton-1 > .toolbarbutton-menu-dropmarker {
-  margin-inline-end: 1px;
-}
-
-.toolbarbutton-1 > .toolbarbutton-menubutton-button {
-  border-inline-end: none !important;
-}
-
-.toolbarbutton-1 > .toolbarbutton-menubutton-button:-moz-locale-dir(rtl),
-.toolbarbutton-1 > .toolbarbutton-menubutton-dropmarker:-moz-locale-dir(ltr) {
-  border-top-left-radius: 0;
-  border-bottom-left-radius: 0;
-}
-
-.toolbarbutton-1 > .toolbarbutton-menubutton-button:-moz-locale-dir(ltr),
-.toolbarbutton-1 > .toolbarbutton-menubutton-dropmarker:-moz-locale-dir(rtl) {
-  border-top-right-radius: 0;
-  border-bottom-right-radius: 0;
-}
-
-.toolbarbutton-1 > menupopup {
-  margin-top: 1px;
-}
-
-.toolbarbutton-1 > menupopup.cui-widget-panel {
-  margin-top: -5px;
-}
-
-/* Common back and forward button styles */
-
-#back-button,
-#forward-button {
-  background: linear-gradient(rgba(255,255,255,0.5),
-                              rgba(255,255,255,0.2) 50%,
-                              rgba(255,255,255,0.1) 50%,
-                              rgba(255,255,255,0.2)) repeat-x;
-}
-
-#back-button:-moz-lwtheme,
-#forward-button:-moz-lwtheme {
-  background-origin: border-box;
-  border: 1px solid rgba(0,0,0,0.4);
-  box-shadow: inset 0 1px rgba(255,255,255,0.3), 0 1px rgba(255,255,255,0.2);
-}
-
-#back-button:active:hover:-moz-lwtheme,
-#forward-button:active:hover:-moz-lwtheme {
-  background-color: rgba(0,0,0,0.2);
-  box-shadow: inset 0 2px 5px rgba(0,0,0,0.6), 0 1px rgba(255,255,255,0.2);
-}
-
-#back-button:-moz-window-inactive,
-#forward-button:-moz-window-inactive {
-  background-color: rgba(0,0,0,0.04);
-  border-color: rgba(0,0,0,0.2);
-}
-
-#back-button > .toolbarbutton-icon,
-#forward-button > .toolbarbutton-icon {
-  max-width: none;
-  width: 18px;
-}
-
-/* Back button styles */
-
-#back-button {
-  width: 32px;
-  height: 32px;
-  padding: 4px 5px 4px 3px;
-  margin-inline-end: 0;
-  border-radius: 10000px;
-}
-
-#back-button:-moz-locale-dir(rtl) {
-  transform: scaleX(-1);
-}
-
-#back-button:not(:-moz-lwtheme) {
-  height: 33px;
-  padding: 4px 5px 5px 3px;
-  margin-bottom: -1px;
-  background: url(chrome://browser/skin/keyhole-circle.png) 0 0 no-repeat;
-}
-
-@media (min-resolution: 2dppx) {
-  #back-button:not(:-moz-lwtheme) {
-    background-image: url(chrome://browser/skin/keyhole-circle@2x.png);
-    background-size: 96px;
-  }
-}
-
-#back-button:-moz-window-inactive:not(:-moz-lwtheme) {
-  background-position: -64px 0;
-}
-
-#back-button:not([disabled="true"]):active:hover:not(:-moz-lwtheme),
-#back-button[open="true"]:not(:-moz-lwtheme) {
-  background-position: -32px 0;
-}
-
-/* Forward button styles */
-
-#forward-button {
-  margin-left: -2px;
-  margin-right: 0;
-  padding-left: 2px;
-  width: 32px;
-}
-
-#forward-button > .toolbarbutton-icon {
-  /* shift the icon away from the back button */
-  margin-left: 3px;
-  margin-right: -1px;
-}
-
-#forward-button:not(:-moz-lwtheme) {
-  background-image: linear-gradient(hsla(0,0%,100%,.73), hsla(0,0%,100%,.05) 85%);
-  border: 1px solid;
-  border-color: hsla(0,0%,0%,.35) hsla(0,0%,0%,.25) hsla(0,0%,0%,.2);
-  box-shadow: inset 0 1px 0 hsla(0,0%,100%,.2),
-              inset 0 0 1px hsla(0,0%,100%,.1),
-              0 1px 0 hsla(0,0%,100%,.2);
-}
-
-#forward-button:hover:active:not(:-moz-lwtheme) {
-  background-image: linear-gradient(hsla(0,0%,60%,.37), hsla(0,0%,100%,.35) 95%);
-  border-color: hsla(0,0%,0%,.43) hsla(0,0%,0%,.25) hsla(0,0%,0%,.37);
-  box-shadow: inset 0 1px 0 hsla(0,0%,0%,.02),
-              inset 0 1px 2px hsla(0,0%,0%,.2),
-              0 1px 0 hsla(0,0%,100%,.2);
-}
-
-#forward-button:-moz-window-inactive:not(:-moz-lwtheme) {
-  background-image: none;
-  border-color: hsla(0,0%,0%,.2);
-  box-shadow: inset 0 1px 0 hsla(0,0%,100%,.35);
-}
-
-@media (-moz-mac-yosemite-theme) {
-  /* Base and hover styles */
-  #forward-button:not(:-moz-lwtheme),
-  #back-button:not(:-moz-lwtheme),
-  #forward-button:hover:not(:-moz-lwtheme),
-  #back-button:hover:not(:-moz-lwtheme) {
-    background-image: none;
-    background-color: #fbfbfb;
-    background-clip: border-box;
-    border: 1px solid #aeaeae;
-    box-shadow: none;
-  }
-
-  #back-button:not(:-moz-lwtheme) {
-    /* On non-lwtheme OS X, we use a 32-px image in a 33px container with negative margin bottom.
-     * Except that on Yosemite, we want to use a border instead of an image - like for lwthemes.
-     * So we need to readjust the height, padding and margin-bottom of the back button
-     * similarly to how we do this for lwthemes (but keep a specific enough selector to
-     * override the other :not(:-moz-lwtheme) selector above): */
-    height: 32px;
-    padding: 4px 5px 4px 3px;
-    margin-bottom: 0;
-  }
-
-  /* White inset shadow on top of the back button */
-  #back-button:not(:-moz-lwtheme),
-  #back-button:hover:not(:-moz-lwtheme) {
-    box-shadow: inset 0 1px 0.5px 0 #fff;
-  }
-
-  /* Bottom shadow and right border for the forward button to match the location bar */
-  #forward-button:hover:not(:-moz-lwtheme),
-  #forward-button:not(:-moz-lwtheme) {
-    box-shadow: 0 1px 0 0 rgba(0,0,0,0.2);
-    border: 0 none;
-    border-right: 1px solid rgba(0,0,0,0.3);
-  }
-
-  /* Active styling: transparent white over toolbar colors */
-  #forward-button:hover:active:not(:-moz-lwtheme),
-  #back-button:not([disabled="true"]):hover:active:not(:-moz-lwtheme) {
-    background-image: linear-gradient(to bottom, rgba(255,255,255, 0.3), rgba(255,255,255, 0.4));
-    background-color: transparent;
-    box-shadow: none;
-  }
-
-  /* Add white detail on top of forward button only when active */
-  #forward-button:hover:active:not(:-moz-lwtheme) {
-    box-shadow: inset 0 1px 0 #f1f1f1, 0 1px 0 0 rgba(0,0,0,0.2);
-  }
-
-  /* Inactive window styling (hover styling is identical;
-   * we need to make this explicit because it is different on lion, see above. */
-  #forward-button:-moz-window-inactive:not(:-moz-lwtheme),
-  #back-button:-moz-window-inactive:not(:-moz-lwtheme),
-  #forward-button:hover:-moz-window-inactive:not(:-moz-lwtheme),
-  #back-button:hover:-moz-window-inactive:not(:-moz-lwtheme) {
-    background-image: none;
-    background-color: #f0f0f0;
-    background-clip: border-box;
-    border: 1px solid rgba(0,0,0,0.1);
-    box-shadow: none;
-  }
-
-  /* Lightweight theme styles */
-  #forward-button:-moz-lwtheme,
-  #forward-button:hover:-moz-lwtheme {
-    border: 0 none;
-    border-right: 1px solid rgba(0,0,0,0.3);
-    box-shadow: 0 1px 0 0 rgba(0,0,0,0.2);
-  }
-
-  #forward-button:-moz-lwtheme,
-  #forward-button:hover:-moz-lwtheme,
-  #back-button:-moz-lwtheme,
-  #back-button:hover:-moz-lwtheme {
-    background-color: rgba(255,255,255,0.5);
-    background-image: none;
-    background-clip: border-box;
-  }
-
-  #forward-button:hover:active:-moz-lwtheme,
-  #back-button:hover:active:-moz-lwtheme {
-    background-image: linear-gradient(to bottom, rgba(255,255,255, 0.7), rgba(255,255,255, 0.8));
-    background-color: transparent;
-    box-shadow: none;
-  }
-
-  #forward-button:hover:active:-moz-lwtheme {
-    box-shadow: 0 1px 0 0 rgba(0,0,0,0.2);
-  }
-}
-
-@conditionalForwardWithUrlbar@:not([switchingtabs]) > #forward-button {
-  transition: margin-left @forwardTransitionLength@ ease-out;
-}
-
-@conditionalForwardWithUrlbar@ > #forward-button[disabled] {
-  margin-left: calc(0px - var(--forwardbutton-width) - var(--backbutton-urlbar-overlap));
-}
-
-@conditionalForwardWithUrlbar@:hover:not([switchingtabs]) > #forward-button[disabled] {
-  /* delay the hiding of the forward button when hovered to avoid accidental clicks on the url bar */
-  transition-delay: 100s;
-}
-
-@conditionalForwardWithUrlbar@:not(:hover) > #forward-button[disabled] {
-  /* when not hovered anymore, trigger a new transition to hide the forward button immediately */
-  margin-left: calc(-0.01px - var(--forwardbutton-width) - var(--backbutton-urlbar-overlap));
-}
-
-.unified-nav-back[_moz-menuactive]:-moz-locale-dir(ltr),
-.unified-nav-forward[_moz-menuactive]:-moz-locale-dir(rtl) {
-  list-style-image: url("chrome://browser/skin/menu-back.png") !important;
-}
-
-.unified-nav-forward[_moz-menuactive]:-moz-locale-dir(ltr),
-.unified-nav-back[_moz-menuactive]:-moz-locale-dir(rtl) {
-  list-style-image: url("chrome://browser/skin/menu-forward.png") !important;
-}
-
-/* undo close tab menu item */
-#alltabs_undoCloseTab {
-  list-style-image: url(chrome://browser/skin/undoCloseTab.png);
-}
-
-@media (min-resolution: 2dppx) {
-  #alltabs_undoCloseTab {
-    list-style-image: url(chrome://browser/skin/undoCloseTab@2x.png);
-  }
-  #alltabs_undoCloseTab > .toolbarbutton-icon {
-    width: 16px;
-  }
-}
-
-#cut-button {
-  margin-inline-end: 0;
-}
-
-#edit-controls[cui-areatype="toolbar"] > #cut-button {
-  border-inline-end: 0;
-}
-
-#paste-button {
-  border-inline-start: none;
-  margin-inline-start: 0;
-}
-
-#cut-button:-moz-locale-dir(ltr),
-#paste-button:-moz-locale-dir(rtl) {
-  border-top-right-radius: 0;
-  border-bottom-right-radius: 0;
-}
-
-#cut-button:-moz-locale-dir(rtl),
-#paste-button:-moz-locale-dir(ltr) {
-  border-top-left-radius: 0;
-  border-bottom-left-radius: 0;
-}
-
-#copy-button {
-  border-radius: 0;
-  margin-right: 0;
-  margin-left: 0;
-}
-
-/* zoom controls */
-
-#zoom-out-button {
-  margin-inline-end: 0;
-}
-
-#zoom-in-button {
-  margin-inline-start: 0;
-  border-inline-start: 0;
-}
-
-#zoom-controls[cui-areatype="toolbar"] > #zoom-out-button {
-  border-inline-end: 0;
-}
-
-#zoom-controls[cui-areatype="toolbar"] > #zoom-in-button {
-  border-inline-start-width: 1px;
-}
-
-#zoom-controls[cui-areatype="toolbar"] > #zoom-reset-button {
-  border-radius: 0;
-}
-
-#zoom-out-button:-moz-locale-dir(ltr),
-#zoom-in-button:-moz-locale-dir(rtl) {
-  border-top-right-radius: 0;
-  border-bottom-right-radius: 0;
-}
-
-#zoom-out-button:-moz-locale-dir(rtl),
-#zoom-in-button:-moz-locale-dir(ltr) {
-  border-top-left-radius: 0;
-  border-bottom-left-radius: 0;
-}
-
-#zoom-controls[cui-areatype="toolbar"]:not([overflowedItem=true]) > #zoom-reset-button {
-  min-width: 0;
-  margin: 0;
-  -moz-box-orient: horizontal;
-  -moz-box-align: center;
-}
-
-/* ----- FULLSCREEN WINDOW CONTROLS ----- */
-
-#minimize-button,
-#close-button,
-#fullscreen-button ~ #window-controls > #restore-button {
-  display: none;
-}
-
-/* ::::: nav-bar-inner ::::: */
-
-#urlbar,
-.searchbar-textbox {
-  font: icon;
-  -moz-appearance: none;
-  box-shadow: 0 1px 0 hsla(0,0%,100%,.2),
-              inset 0 0 1px hsla(0,0%,0%,.05),
-              inset 0 1px 2px hsla(0,0%,0%,.1);
-  margin: 0 4px;
-  padding: 1px 0;
-  border: 1px solid;
-  background-image: linear-gradient(hsl(0,0%,97%), hsl(0,0%,100%));
-  border-color: hsla(0,0%,0%,.35) hsla(0,0%,0%,.25) hsla(0,0%,0%,.15);
-  background-clip: padding-box;
-}
-
-#urlbar[readonly] {
-  background-color: -moz-field;
-}
-
-@media (-moz-mac-yosemite-theme) {
-  .searchbar-textbox,
-  #urlbar {
-    border-color: #fff;
-    border-radius: 3px;
-    box-shadow: 0 .5px 0 0 rgba(0,0,0,0.2);
-    background-image: none;
-  }
-  .searchbar-textbox:-moz-window-inactive,
-  #urlbar:-moz-window-inactive {
-    box-shadow: none;
-    border-color: rgba(0,0,0,0.1);
-  }
-}
-
-#urlbar[focused="true"],
-.searchbar-textbox[focused="true"] {
-  border-color: -moz-mac-focusring;
-  box-shadow: @focusRingShadow@;
-}
-
-@media (-moz-mac-yosemite-theme) {
-  #urlbar[focused="true"],
-  .searchbar-textbox[focused="true"] {
-    box-shadow: @yosemiteFocusRingShadow@;
-  }
-}
-
-#urlbar-container {
-  -moz-box-align: center;
-}
-
-#urlbar {
-  border-radius: @toolbarbuttonCornerRadius@;
-}
-
-@conditionalForwardWithUrlbar@ > #urlbar {
-  border-inline-start: none;
-  margin-left: 0;
-}
-
-@conditionalForwardWithUrlbar@ > #urlbar:-moz-locale-dir(ltr) {
-  border-top-left-radius: 0;
-  border-bottom-left-radius: 0;
-}
-
-@conditionalForwardWithUrlbar@ > #urlbar:-moz-locale-dir(rtl) {
-  border-top-right-radius: 0;
-  border-bottom-right-radius: 0;
-}
-
-@conditionalForwardWithUrlbar@ {
-  clip-path: url("chrome://browser/content/browser.xul#urlbar-back-button-clip-path");
-  margin-inline-start: calc(-1 * var(--backbutton-urlbar-overlap));
-}
-
-@conditionalForwardWithUrlbar@:-moz-locale-dir(rtl),
-@conditionalForwardWithUrlbar@ > #urlbar:-moz-locale-dir(rtl) {
-  /* let urlbar-back-button-clip-path clip the urlbar's right side for RTL */
-  transform: scaleX(-1);
-}
-
-@conditionalForwardWithUrlbar@:-moz-locale-dir(rtl) {
-  -moz-box-direction: reverse;
-}
-
-%include ../shared/identity-block/identity-block.inc.css
-
-#identity-box {
-  padding-top: 2px;
-  padding-bottom: 2px;
-}
-
-#urlbar:not([focused="true"]) > #identity-box {
-  margin-top: -1px;
-  margin-bottom: -1px;
-  padding-top: 3px;
-  padding-bottom: 3px;
-}
-
-@media (-moz-mac-yosemite-theme) {
-  #urlbar:not([focused="true"]):not(:-moz-window-inactive) > #identity-box {
-    margin-top: -2px;
-    margin-bottom: -2px;
-    padding-top: 4px;
-    padding-bottom: 4px;
-  }
-}
-
-#identity-box:-moz-locale-dir(ltr) {
-  border-top-left-radius: 2px;
-  border-bottom-left-radius: 2px;
-}
-
-#identity-box:-moz-locale-dir(rtl) {
-  border-top-right-radius: 2px;
-  border-bottom-right-radius: 2px;
-}
-
-#identity-box:-moz-focusring {
-  box-shadow: 0 0 2px 1px -moz-mac-focusring inset,
-              0 0 2px 2px -moz-mac-focusring;
-  border-inline-end-style: none;
-  padding-inline-end: 5px;
-}
-
-.urlbar-input-box {
-  margin-inline-start: 0;
-  padding: 3px 0 2px;
-}
-
-.urlbar-input-box,
-#urlbar-display-box {
-  padding-inline-start: 4px;
-  border-inline-start: 1px solid var(--urlbar-separator-color);
-  border-image: linear-gradient(transparent 15%, var(--urlbar-separator-color) 15%, var(--urlbar-separator-color) 85%, transparent 85%);
-  border-image-slice: 1;
-}
-
-.urlbar-history-dropmarker {
-  padding: 0 3px;
-  list-style-image: var(--urlbar-dropmarker-url);
-  -moz-image-region: var(--urlbar-dropmarker-region);
-  transition: opacity 0.15s ease;
-}
-
-#urlbar-wrapper[switchingtabs] > #urlbar > .urlbar-textbox-container > .urlbar-history-dropmarker {
-  transition: none;
-}
-
-#navigator-toolbox:not(:hover) #nav-bar:not([customizing="true"]) #urlbar:not([focused]) > .urlbar-textbox-container > .urlbar-history-dropmarker {
-  opacity: 0;
-}
-
-.urlbar-history-dropmarker[open="true"],
-.urlbar-history-dropmarker:hover:active {
-  -moz-image-region: var(--urlbar-dropmarker-active-region);
-}
-
-@media (min-resolution: 2dppx) {
-  .urlbar-history-dropmarker {
-    list-style-image: var(--urlbar-dropmarker-2x-url);
-    -moz-image-region: var(--urlbar-dropmarker-2x-region);
-  }
-
-  .urlbar-history-dropmarker[open="true"],
-  .urlbar-history-dropmarker:hover:active {
-    -moz-image-region: var(--urlbar-dropmarker-active-2x-region);
-  }
-
-  .urlbar-history-dropmarker > .dropmarker-icon {
-    width: 11px;
-  }
-}
-
-#urlbar-icons {
-  -moz-box-align: center;
-}
-
-.urlbar-icon {
-  padding: 0 3px;
-  /* 16x16 icon with border-box sizing */
-  width: 22px;
-  height: 16px;
-}
-
-/* ::::: URL Bar Zoom Reset Button ::::: */
-@keyframes urlbar-zoom-reset-pulse {
-  0% {
-    transform: scale(0);
-  }
-  75% {
-    transform: scale(1.5);
-  }
-  100% {
-    transform: scale(1.0);
-  }
-}
-
-#urlbar-zoom-button {
-  margin: 0 3px;
-  font-size: .8em;
-  padding: 0 8px;
-  border-radius: 1em;
-  background-color: hsla(0,0%,0%,.05);
-  border: 1px solid ThreeDLightShadow;
-}
-
-#urlbar-zoom-button[animate="true"] {
-  animation-name: urlbar-zoom-reset-pulse;
-  animation-duration: 250ms;
-}
-
-#urlbar-zoom-button:hover {
-  background-color: hsla(0,0%,0%,.1);
-}
-
-#urlbar-zoom-button:hover:active {
-  background-color: hsla(0,0%,0%,.15);
-}
-
-#urlbar-zoom-button > .toolbarbutton-text {
-  display: -moz-box;
-}
-
-#urlbar-zoom-button > .toolbarbutton-icon {
-  display: none;
-}
-
-#urlbar-search-footer {
-  border-top: 1px solid var(--panel-separator-color);
-  background-color: var(--arrowpanel-dimmed);
-}
-
-#urlbar-search-settings {
-  -moz-appearance: none;
-  -moz-user-focus: ignore;
-  color: GrayText;
-  margin: 0;
-  padding: 8px 20px;
-}
-
-#urlbar-search-settings:hover {
-  background-color: var(--arrowpanel-dimmed);
-}
-
-#urlbar-search-settings:hover:active {
-  background-color: var(--arrowpanel-dimmed-further);
-}
-
-#urlbar-search-splitter {
-  min-width: 8px;
-  width: 8px;
-  background-image: none;
-  margin: 0 -4px;
-  position: relative;
-  height: 22px;
-}
-
-#search-container {
-  min-width: calc(54px + 11ch);
-}
-
-#wrapper-urlbar-container[place="palette"] {
-  max-width: 20em;
-}
-
-.urlbar-display {
-  margin-top: 0;
-  margin-bottom: 0;
-  color: GrayText;
-}
-
-%include ../shared/urlbarSearchSuggestionsNotification.inc.css
-
-/* ----- AUTOCOMPLETE ----- */
-
-%include ../shared/autocomplete.inc.css
-
-#PopupAutoComplete > richlistbox > richlistitem[originaltype~="datalist-first"] {
-  border-top: 1px solid #C7C7C7;
-}
-
-#treecolAutoCompleteImage {
-  max-width: 36px;
-}
-
-.autocomplete-richlistbox {
-  padding: 4px;
-}
-
-.autocomplete-richlistitem {
-  height: 30px;
-  min-height: 30px;
-  font: message-box;
-  border-radius: 2px;
-  border: 1px solid transparent;
-}
-
-.autocomplete-richlistitem[selected] {
-  background-color: hsl(210, 80%, 52%);
-}
-
-.ac-title {
-  font-size: 14px;
-  color: hsl(0, 0%, 0%);
-}
-
-.ac-tags {
-  font-size: 12px;
-}
-
-html|span.ac-tag {
-  background-color: hsl(216, 0%, 88%);
-  color: hsl(0, 0%, 0%);
-  border-radius: 2px;
-  border: 1px solid transparent;
-  padding: 0 1px;
-}
-
-.ac-separator,
-.ac-url,
-.ac-action {
-  font-size: 12px;
-}
-
-.ac-separator {
-  color: hsl(0, 0%, 50%);
-}
-
-.ac-url {
-  color: hsl(210, 77%, 47%);
-}
-
-.ac-action {
-  color: hsl(178, 100%, 28%);
-}
-
-.ac-title[selected],
-.ac-separator[selected],
-.ac-url[selected],
-.ac-action[selected] {
-  color: hsl(0, 0%, 100%);
-}
-
-.ac-tags-text[selected] > html|span.ac-tag {
-  background-color: hsl(0, 0%, 100%);
-  color: hsl(210, 80%, 40%);
-}
-
-html|span.ac-emphasize-text-title,
-html|span.ac-emphasize-text-tag,
-html|span.ac-emphasize-text-url {
-  font-weight: 600;
-}
-
-.ac-type-icon[type=bookmark] {
-  list-style-image: url("chrome://browser/skin/urlbar-star.svg#star");
-}
-
-.autocomplete-treebody::-moz-tree-image(bookmark, treecolAutoCompleteImage) {
-  list-style-image: url("chrome://browser/skin/places/autocomplete-star.png");
-  -moz-image-region: rect(0, 16px, 16px, 0);
-}
-
-.autocomplete-treebody::-moz-tree-image(selected, current, bookmark, treecolAutoCompleteImage) {
-  -moz-image-region: rect(0, 32px, 16px, 16px);
-}
-
-.ac-type-icon[type=bookmark][selected][current] {
-  list-style-image: url("chrome://browser/skin/urlbar-star.svg#star-inverted");
-}
-
-.ac-type-icon[type=keyword],
-.ac-site-icon[type=searchengine],
-.autocomplete-treebody::-moz-tree-image(keyword, treecolAutoCompleteImage) {
-  list-style-image: url(chrome://global/skin/icons/autocomplete-search.svg#search-icon);
-}
-
-.ac-type-icon[type=keyword][selected],
-.ac-site-icon[type=searchengine][selected],
-.autocomplete-treebody::-moz-tree-image(keyword, treecolAutoCompleteImage, selected) {
-  list-style-image: url(chrome://global/skin/icons/autocomplete-search.svg#search-icon-inverted);
-}
-
-.autocomplete-treebody::-moz-tree-image(tag, treecolAutoCompleteImage) {
-  list-style-image: url("chrome://browser/skin/places/tag.png");
-}
-
-.ac-type-icon[type=switchtab],
-.ac-type-icon[type=remotetab] {
-  list-style-image: url("chrome://browser/skin/urlbar-tab.svg#tab");
-}
-
-.ac-type-icon[type=switchtab][selected],
-.ac-type-icon[type=remotetab][selected] {
-  list-style-image: url("chrome://browser/skin/urlbar-tab.svg#tab-inverted");
-}
-
-.autocomplete-treebody::-moz-tree-cell-text(treecolAutoCompleteComment) {
-  color: GrayText;
-}
-
-.autocomplete-treebody::-moz-tree-cell-text(suggesthint, treecolAutoCompleteComment),
-.autocomplete-treebody::-moz-tree-cell-text(suggestfirst, treecolAutoCompleteComment)
-{
-  color: GrayText;
-  font-size: smaller;
-}
-
-.autocomplete-treebody::-moz-tree-cell(suggesthint) {
-  border-top: 1px solid GrayText;
-}
-
-
-/* ----- COMBINED GO/RELOAD/STOP BUTTON IN LOCATION BAR ----- */
-
-#urlbar-go-button,
-#urlbar-reload-button,
-#urlbar-stop-button {
-  margin: 0;
-  list-style-image: url("chrome://browser/skin/reload-stop-go.png");
-  padding: 0 9px;
-  margin-inline-start: 5px;
-  border-inline-start: 1px solid var(--urlbar-separator-color);
-  border-image: linear-gradient(transparent 15%,
-                                var(--urlbar-separator-color) 15%,
-                                var(--urlbar-separator-color) 85%,
-                                transparent 85%);
-  border-image-slice: 1;
-}
-
-#urlbar-go-button {
-  -moz-image-region: rect(0, 42px, 14px, 28px);
-}
-
-#urlbar-go-button:hover:active {
-  -moz-image-region: rect(14px, 42px, 28px, 28px);
-}
-
-#urlbar-go-button:-moz-locale-dir(rtl) > .toolbarbutton-icon {
-  transform: scaleX(-1);
-}
-
-#urlbar-reload-button {
-  -moz-image-region: rect(0, 14px, 14px, 0);
-}
-
-#urlbar-reload-button:not([disabled]):hover:active {
-  -moz-image-region: rect(14px, 14px, 28px, 0);
-}
-
-#urlbar-reload-button:-moz-locale-dir(rtl) > .toolbarbutton-icon {
-  transform: scaleX(-1);
-}
-
-#urlbar-stop-button {
-  -moz-image-region: rect(0, 28px, 14px, 14px);
-}
-
-#urlbar-stop-button:hover:active {
-  -moz-image-region: rect(14px, 28px, 28px, 14px);
-}
-
-@media (min-resolution: 2dppx) {
-  #urlbar-go-button,
-  #urlbar-reload-button,
-  #urlbar-stop-button {
-    list-style-image: url("chrome://browser/skin/reload-stop-go@2x.png");
-  }
-
-  #urlbar-go-button > .toolbarbutton-icon,
-  #urlbar-reload-button > .toolbarbutton-icon,
-  #urlbar-stop-button > .toolbarbutton-icon {
-    width: 14px;
-  }
-
-  #urlbar-go-button {
-    -moz-image-region: rect(0, 84px, 28px, 56px);
-  }
-
-  #urlbar-go-button:hover:active {
-    -moz-image-region: rect(28px, 84px, 56px, 56px);
-  }
-
-  #urlbar-reload-button {
-    -moz-image-region: rect(0, 28px, 28px, 0);
-  }
-
-  #urlbar-reload-button:not([disabled]):hover:active {
-    -moz-image-region: rect(28px, 28px, 56px, 0);
-  }
-
-  #urlbar-stop-button {
-    -moz-image-region: rect(0, 56px, 28px, 28px);
-  }
-
-  #urlbar-stop-button:hover:active {
-    -moz-image-region: rect(28px, 56px, 56px, 28px);
-  }
-}
-
-#bookmarks-menu-button[cui-areatype="toolbar"] > .toolbarbutton-menubutton-dropmarker > .dropmarker-icon {
-  width: 18px;
-  height: 18px;
-}
-
-#bookmarks-menu-button[cui-areatype="toolbar"].bookmark-item > .toolbarbutton-menubutton-dropmarker > .dropmarker-icon {
-  width: 16px;
-  height: 16px;
-}
-
-#BMB_bookmarksPopup[side="top"],
-#BMB_bookmarksPopup[side="bottom"] {
-  margin-left: -26px;
-  margin-right: -26px;
-}
-
-#BMB_bookmarksPopup[side="left"],
-#BMB_bookmarksPopup[side="right"] {
-  margin-top: -26px;
-  margin-bottom: -26px;
-}
-
-/* POPUP BLOCKER BUTTON */
-#page-report-button {
-  list-style-image: url("chrome://browser/skin/urlbar-popup-blocked.png");
-  -moz-image-region: rect(0, 16px, 16px, 0);
-}
-
-#page-report-button:hover:active,
-#page-report-button[open="true"] {
-  -moz-image-region: rect(0, 32px, 16px, 16px);
-}
-
-@media (min-resolution: 2dppx) {
-  #page-report-button {
-    list-style-image: url("chrome://browser/skin/urlbar-popup-blocked@2x.png");
-    -moz-image-region: rect(0, 32px, 32px, 0);
-  }
-
-  #page-report-button:hover:active,
-  #page-report-button[open="true"] {
-    -moz-image-region: rect(0, 64px, 32px, 32px);
-  }
-}
-
-/* Reader mode button */
-
-#reader-mode-button {
-  list-style-image: url("chrome://browser/skin/readerMode.svg");
-  -moz-image-region: rect(0, 16px, 16px, 0);
-}
-
-#reader-mode-button:hover:active {
-  -moz-image-region: rect(0, 32px, 16px, 16px);
-}
-
-#reader-mode-button[readeractive] {
-  -moz-image-region: rect(0, 48px, 16px, 32px);
-}
-
-/* BOOKMARKING PANEL */
-#editBookmarkPanelStarIcon {
-  list-style-image: url("chrome://browser/skin/places/starred48.png");
-  width: 48px;
-  height: 48px;
-}
-
-#editBookmarkPanelStarIcon[unstarred] {
-  list-style-image: url("chrome://browser/skin/places/unstarred48.png");
-}
-
-@media (min-resolution: 2dppx) {
-  #editBookmarkPanelStarIcon {
-    list-style-image: url("chrome://browser/skin/places/starred48@2x.png");
-    -moz-image-region: rect(0px 96px 96px 0px);
-  }
-}
-
-#editBookmarkPanelTitle {
-  font-size: 130%;
-  font-weight: bold;
-}
-
-#editBMPanel_rows > row {
-  margin-bottom: 8px;
-}
-
-#editBMPanel_rows > row:last-of-type {
-  margin-bottom: 0;
-}
-
-/**** Input elements ****/
-
-#editBMPanel_rows > row > textbox,
-#editBMPanel_rows > row > hbox > textbox {
-  -moz-appearance: none;
-  background: linear-gradient(#fafafa, #fff);
-  background-clip: padding-box;
-  border-radius: 3px;
-  border: 1px solid rgba(0,0,0,.3) !important;
-  box-shadow: inset 0 1px 1px 1px rgba(0,0,0,.05),
-              0 1px rgba(255,255,255,.3);
-  margin: 0;
-  padding: 3px 6px;
-}
-
-#editBMPanel_rows > row > textbox[focused="true"],
-#editBMPanel_rows > row > hbox > textbox[focused="true"] {
-  border-color: -moz-mac-focusring !important;
-  box-shadow: @focusRingShadow@;
-}
-
-/**** HUD style buttons ****/
-
-.editBookmarkPanelHeaderButton,
-.editBookmarkPanelBottomButton {
-  @hudButton@
-  margin: 0;
-  min-width: 82px;
-  min-height: 22px;
-}
-
-.editBookmarkPanelHeaderButton:hover:active,
-.editBookmarkPanelBottomButton:hover:active {
-  @hudButtonPressed@
-}
-
-.editBookmarkPanelHeaderButton:-moz-focusring,
-.editBookmarkPanelBottomButton:-moz-focusring {
-  @hudButtonFocused@
-}
-
-.editBookmarkPanelBottomButton[default="true"] {
-  background-color: #666;
-}
-
-#editBookmarkPanelHeader {
-  margin-bottom: 6px;
-}
-
-.editBookmarkPanelBottomButton:last-child {
-  margin-inline-start: 8px;
-}
-
-/* The following elements come from editBookmarkOverlay.xul. Styling that's
-   specific to the editBookmarkPanel should be in browser.css. Styling that
-   should be shared by all editBookmarkOverlay.xul consumers should be in
-   editBookmarkOverlay.css. */
-
-#editBMPanel_newFolderBox {
-  background: linear-gradient(#fff, #f2f2f2);
-  background-origin: padding-box;
-  background-clip: padding-box;
-  border-radius: 0 0 3px 3px;
-  border: 1px solid #a5a5a5;
-  box-shadow: inset 0 1px rgba(255,255,255,.8),
-              inset 0 0 1px rgba(255,255, 255,.25),
-              0 1px rgba(255,255,255,.3);
-  margin: 0;
-  padding: 0;
-  height:  20px;
-}
-
-#editBMPanel_newFolderButton {
-  -moz-appearance: none;
-  border: 0 solid #a5a5a5;
-  border-inline-end-width: 1px;
-  padding: 0 9px;
-  margin: 0;
-  min-width: 21px;
-  min-height: 20px;
-  height:  20px;
-  color: #fff;
-  list-style-image: url("chrome://browser/skin/panel-plus-sign.png");
-  position: relative;
-}
-
-#editBMPanel_newFolderButton:hover:active {
-  background: linear-gradient(rgba(40,40,40,.9), rgba(70,70,70,.9));
-  box-shadow: inset 0 0 3px rgba(0,0,0,.2), inset 0 1px 7px rgba(0,0,0,.4);
-}
-
-#editBMPanel_newFolderButton:-moz-focusring {
-  @hudButtonFocused@
-}
-
-#editBMPanel_newFolderButton .button-text {
-  display: none;
-}
-
-#editBMPanel_folderMenuList {
-  @hudButton@
-  background-clip: padding-box;
-  margin: 0;
-  min-height: 22px;
-  padding-top: 2px;
-  padding-bottom: 1px;
-  padding-inline-start: 8px;
-  padding-inline-end: 4px;
-}
-
-#editBMPanel_folderMenuList:-moz-focusring {
-  @hudButtonFocused@
-}
-
-#editBMPanel_folderMenuList[open="true"],
-#editBMPanel_folderMenuList:hover:active {
-  @hudButtonPressed@
-}
-
-#editBMPanel_folderMenuList > .menulist-dropmarker {
-  -moz-appearance: none;
-  display: -moz-box;
-  background-color: transparent;
-  border: 0;
-  margin: 0;
-  padding: 0;
-  padding-inline-end: 4px;
-  width: 7px;
-}
-
-#editBMPanel_folderMenuList > .menulist-dropmarker > .dropmarker-icon {
-  list-style-image: url("chrome://global/skin/icons/panel-dropmarker.png");
-}
-
-/**** folder tree and tag selector ****/
-
-#editBMPanel_folderTree,
-#editBMPanel_tagsSelector {
-  -moz-appearance: none;
-  background: linear-gradient(#fafafa, #fff);
-  background-clip: padding-box;
-  border-radius: 3px;
-  border: 1px solid rgba(0,0,0,.3);
-  box-shadow: inset 0 1px 1px 1px rgba(0,0,0,.05),
-              0 1px rgba(255,255,255,.3);
-  margin: 0;
-}
-
-#editBMPanel_folderTree:-moz-focusring,
-#editBMPanel_tagsSelector:-moz-focusring {
-  border-color: -moz-mac-focusring;
-  box-shadow: @focusRingShadow@;
-}
-
-#editBMPanel_folderTree {
-  border-bottom: none;
-  border-bottom-left-radius: 0;
-  border-bottom-right-radius: 0;
-  /* Implements editBookmarkPanel resizing on folderTree un-collapse. */
-  margin: 0 !important;
-  min-width: 27em;
-  position: relative;
-}
-
-/**** expanders ****/
-
-#editBookmarkPanel .expander-up,
-#editBookmarkPanel .expander-down {
-  @hudButton@
-  margin: 0;
-  margin-inline-start: 4px;
-  min-width: 27px;
-  min-height: 22px;
-}
-
-#editBookmarkPanel .expander-up:-moz-focusring,
-#editBookmarkPanel .expander-down:-moz-focusring {
-  @hudButtonFocused@
-}
-
-#editBookmarkPanel .expander-up:hover:active,
-#editBookmarkPanel .expander-down:hover:active {
-  @hudButtonPressed@
-}
-
-#editBookmarkPanel .expander-up {
-  list-style-image: url("chrome://browser/skin/panel-expander-open.png");
-}
-
-#editBookmarkPanel .expander-down {
-  list-style-image: url("chrome://browser/skin/panel-expander-closed.png");
-}
-
-#editBookmarkPanel .expander-up > .button-box > .button-icon,
-#editBookmarkPanel .expander-down > .button-box > .button-icon {
-  margin: 1px 0 0;
-}
-
-#editBookmarkPanel .expander-up > .button-box > .button-text,
-#editBookmarkPanel .expander-down > .button-box > .button-text {
-  display: none;
-}
-
-@media (min-resolution: 2dppx) {
-  #editBookmarkPanel .expander-up {
-    list-style-image: url("chrome://browser/skin/panel-expander-open@2x.png");
-  }
-
-  #editBookmarkPanel .expander-down {
-    list-style-image: url("chrome://browser/skin/panel-expander-closed@2x.png");
-  }
-
-  #editBookmarkPanel .expander-up > .button-box > .button-icon,
-  #editBookmarkPanel .expander-down > .button-box > .button-icon {
-    width: 9px;
-  }
-}
-
-#editBMPanel_tagsField > .autocomplete-textbox-container > .textbox-input-box > html|*.textbox-input::placeholder {
-  opacity: 1.0;
-  color: #bbb;
-}
-
-.editBMPanel_rowLabel {
-  text-align: end;
-}
-
-/* History Swipe Animation */
-
-#historySwipeAnimationCurrentPage,
-#historySwipeAnimationNextPage {
-  box-shadow: 0 3px 6px rgba(0, 0, 0, 0.6);
-}
-
-#historySwipeAnimationContainer {
-  background: url("chrome://browser/skin/subtle-pattern.png") #B3B9C1;
-}
-
-/* ----- SIDEBAR ELEMENTS ----- */
-
-#sidebar-box {
-  -moz-appearance: -moz-mac-source-list;
-  box-shadow: inset -2px 0 0 hsla(0,0%,100%,.2);
-}
-
-sidebarheader {
-  padding: 2px 2px 0;
-  text-shadow: 0 1px 0 hsla(0,0%,100%,.5);
-}
-
-.sidebar-splitter {
-  border-inline-start: none;
-  border-inline-end: 1px solid #b4b4b4;
-  min-width: 1px;
-  width: 3px;
-  background-image: none !important;
-  background-color: transparent;
-  margin-inline-start: -3px;
-  position: relative;
-}
-
-#appcontent ~ .sidebar-splitter {
-  border-inline-start: 1px solid #ccc;
-  border-inline-end: none;
-  margin-inline-start: 0;
-  margin-inline-end: -3px;
-}
-
-.sidebar-title,
-#sidebar-title {
-  color: #596c80;
-  font-weight: bold;
-}
-
-.sidebar-title:-moz-window-inactive,
-#sidebar-title:-moz-window-inactive {
-  color: #868b92;
-}
-
-.sidebar-throbber[loading="true"],
-#sidebar-throbber[loading="true"] {
-  list-style-image: url("chrome://global/skin/icons/loading.png");
-}
-
-@media (min-resolution: 2dppx) {
-  .sidebar-throbber[loading="true"],
-  #sidebar-throbber[loading="true"] {
-    list-style-image: url("chrome://global/skin/icons/loading@2x.png");
-    width: 16px;
-  }
-}
-
-@media (-moz-mac-yosemite-theme) {
-  #sidebar-box {
-    box-shadow: none;
-  }
-
-  sidebarheader {
-    text-shadow: none;
-    font-weight: 500;
-  }
-
-  .sidebar-title,
-  #sidebar-title {
-    color: #636363;
-    font-weight: 500;
-  }
-}
-
-
-/* ----- CONTENT ----- */
-
-.browserContainer > findbar {
-  background: @scopeBarBackground@;
-  border-top: @scopeBarSeparatorBorder@;
-  color: -moz-DialogText;
-  text-shadow: none;
-}
-
-toolbarbutton.chevron > .toolbarbutton-menu-dropmarker {
-  display: none;
-}
-
-.bookmark-item {
-  list-style-image: url("chrome://mozapps/skin/places/defaultFavicon.png");
-}
-
-@media (min-resolution: 2dppx) {
-  .bookmark-item {
-    list-style-image: url("chrome://mozapps/skin/places/defaultFavicon@2x.png");
-  }
-
-  image.bookmark-item {
-    width: 16px;
-  }
-}
-
-.openintabs-menuitem {
-  list-style-image: none;
-}
-
-/* ::::: tabbrowser ::::: */
-
-.tabbrowser-tabbox {
-  margin: 0;
-}
-
-%include ../shared/tabs.inc.css
-
-.tab-label {
-  margin-top: 1px;
-  margin-bottom: 0;
-  text-align: center;
-}
-
-@media (-moz-mac-yosemite-theme) {
-  /* image preloading hack from shared/tabs.inc.css */
-  #tabbrowser-tabs::before {
-    background-image:
-      url(chrome://browser/skin/yosemite/tab-selected-end-inactive.svg),
-      url(chrome://browser/skin/yosemite/tab-selected-start-inactive.svg),
-      url(chrome://browser/skin/yosemite/tab-stroke-start-inactive.png),
-      url(chrome://browser/skin/yosemite/tab-active-middle-inactive.png),
-      url(chrome://browser/skin/yosemite/tab-stroke-end-inactive.png),
-      url(chrome://browser/skin/tabbrowser/tab-selected-end.svg),
-      url(chrome://browser/skin/tabbrowser/tab-selected-start.svg),
-      url(chrome://browser/skin/tabbrowser/tab-stroke-end.png),
-      url(chrome://browser/skin/tabbrowser/tab-active-middle.png),
-      url(chrome://browser/skin/tabbrowser/tab-stroke-start.png),
-      url(chrome://browser/skin/tabbrowser/tab-background-end.png),
-      url(chrome://browser/skin/tabbrowser/tab-background-middle.png),
-      url(chrome://browser/skin/tabbrowser/tab-background-start.png);
-  }
-
-  .tab-background-middle[selected=true]:-moz-window-inactive {
-    background-image: url(chrome://browser/skin/yosemite/tab-active-middle-inactive.png),
-                      @fgTabTextureYosemiteInactive@,
-                      none;
-  }
-
-  .tab-background-start[selected=true]:-moz-window-inactive:-moz-locale-dir(ltr)::after,
-  .tab-background-end[selected=true]:-moz-window-inactive:-moz-locale-dir(rtl)::after {
-    background-image: url(chrome://browser/skin/yosemite/tab-stroke-start-inactive.png);
-  }
-
-  .tab-background-end[selected=true]:-moz-window-inactive:-moz-locale-dir(ltr)::after,
-  .tab-background-start[selected=true]:-moz-window-inactive:-moz-locale-dir(rtl)::after {
-    background-image: url(chrome://browser/skin/yosemite/tab-stroke-end-inactive.png);
-  }
-
-  .tab-background-start[selected=true]:-moz-window-inactive:-moz-locale-dir(ltr):not(:-moz-lwtheme)::before,
-  .tab-background-end[selected=true]:-moz-window-inactive:-moz-locale-dir(rtl):not(:-moz-lwtheme)::before {
-    background-image: url(chrome://browser/skin/yosemite/tab-selected-start-inactive.svg);
-    background-size: 100% 100%;
-  }
-
-  .tab-background-end[selected=true]:-moz-window-inactive:-moz-locale-dir(ltr):not(:-moz-lwtheme)::before,
-  .tab-background-start[selected=true]:-moz-window-inactive:-moz-locale-dir(rtl):not(:-moz-lwtheme)::before {
-    background-image: url(chrome://browser/skin/yosemite/tab-selected-end-inactive.svg);
-    background-size: 100% 100%;
-  }
-
-  @media (min-resolution: 2dppx) {
-    /* image preloading hack from shared/tabs.inc.css */
-    #tabbrowser-tabs::before {
-      background-image:
-        url(chrome://browser/skin/yosemite/tab-selected-end-inactive.svg),
-        url(chrome://browser/skin/yosemite/tab-selected-start-inactive.svg),
-        url(chrome://browser/skin/yosemite/tab-stroke-start-inactive@2x.png),
-        url(chrome://browser/skin/yosemite/tab-active-middle-inactive@2x.png),
-        url(chrome://browser/skin/yosemite/tab-stroke-end-inactive@2x.png),
-        url(chrome://browser/skin/tabbrowser/tab-selected-end.svg),
-        url(chrome://browser/skin/tabbrowser/tab-selected-start.svg),
-        url(chrome://browser/skin/tabbrowser/tab-stroke-end@2x.png),
-        url(chrome://browser/skin/tabbrowser/tab-active-middle@2x.png),
-        url(chrome://browser/skin/tabbrowser/tab-stroke-start@2x.png),
-        url(chrome://browser/skin/tabbrowser/tab-background-end@2x.png),
-        url(chrome://browser/skin/tabbrowser/tab-background-middle@2x.png),
-        url(chrome://browser/skin/tabbrowser/tab-background-start@2x.png);
-    }
-
-    .tab-background-middle[selected=true]:-moz-window-inactive {
-      background-image: url(chrome://browser/skin/yosemite/tab-active-middle-inactive@2x.png),
-                        @fgTabTextureYosemiteInactive@,
-                        none;
-    }
-
-    .tab-background-start[selected=true]:-moz-window-inactive:-moz-locale-dir(ltr)::after,
-    .tab-background-end[selected=true]:-moz-window-inactive:-moz-locale-dir(rtl)::after {
-      background-image: url(chrome://browser/skin/yosemite/tab-stroke-start-inactive@2x.png);
-    }
-
-    .tab-background-end[selected=true]:-moz-window-inactive:-moz-locale-dir(ltr)::after,
-    .tab-background-start[selected=true]:-moz-window-inactive:-moz-locale-dir(rtl)::after {
-      background-image: url(chrome://browser/skin/yosemite/tab-stroke-end-inactive@2x.png);
-    }
-  }
-}
-
-.tabbrowser-tab:not(:hover) > .tab-stack > .tab-content > .tab-icon-image:not([selected="true"]) {
-  opacity: .9;
-}
-
-/*
- * Force the overlay to create a new stacking context so it always appears on
- * top of the icon.
- */
-.tab-icon-overlay {
-  opacity: 0.9999;
-}
-
-.tab-label:not([selected="true"]) {
-  opacity: .7;
-}
-
-.tabbrowser-tab,
-.tabs-newtab-button {
-  font: message-box;
-  border: none;
-}
-
-.tabbrowser-tab[visuallyselected=true]:not(:-moz-lwtheme) {
-  /* overriding tabbox.css */
-  color: inherit;
-}
-
-.tabbrowser-tab[visuallyselected=true] {
-  /* overriding tabbox.css */
-  text-shadow: inherit;
-}
-
-.tabs-newtab-button > .toolbarbutton-icon {
-  -moz-box-align: center;
-  border: solid transparent;
-  border-width: 0 11px;
-}
-
-.tabbrowser-tab:focus > .tab-stack > .tab-content > .tab-label:not([pinned]),
-.tabbrowser-tab:focus > .tab-stack > .tab-content > .tab-icon-image[pinned],
-.tabbrowser-tab:focus > .tab-stack > .tab-content > .tab-throbber[pinned] {
-  box-shadow: @focusRingShadow@;
-}
-
-#TabsToolbar {
-  -moz-appearance: none;
-  /* overlap the nav-bar's top border */
-  margin-bottom: calc(-1 * var(--tab-toolbar-navbar-overlap));
-}
-
-#main-window:not([customizing]) #navigator-toolbox[inFullscreen] > #TabsToolbar:not(:-moz-lwtheme),
-#main-window:not(:-moz-any([customizing],[tabsintitlebar])) #navigator-toolbox > #TabsToolbar:not(:-moz-lwtheme) {
-  -moz-appearance: toolbar;
-}
-
-#TabsToolbar:not(:-moz-lwtheme) {
-  color: var(--tabs-toolbar-color);
-  text-shadow: @loweredShadow@;
-}
-
-#navigator-toolbox[inFullscreen] > #TabsToolbar {
-  padding-top: var(--space-above-tabbar);
-}
-
-#tabbrowser-tabs {
-  -moz-box-align: stretch;
-}
-
-.tabs-newtab-button > .toolbarbutton-icon {
-  padding: 6px 0 4px;
-}
-
-/**
- * Tab Drag and Drop
- */
-
-.tab-drop-indicator {
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-  margin-top: -2px;
-  z-index: 3;
-}
-
-@media (min-resolution: 2dppx) {
-  .tab-drop-indicator {
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-    width: 12px;
-  }
-}
-
-/**
- * In-tab close button
- */
-
-.tab-close-button > .toolbarbutton-icon {
-  margin-inline-end: 0px !important;
-}
-
-.tab-close-button {
-  -moz-appearance: none;
-  border: none !important;
-  background: none;
-  cursor: default;
-}
-
-#TabsToolbar[brighttext] .tab-close-button.close-icon:not([selected=true]):not(:hover) {
-  -moz-image-region: rect(0, 64px, 16px, 48px);
-}
-
-@media (min-resolution: 2dppx) {
-  #TabsToolbar[brighttext] .tab-close-button.close-icon:not([selected=true]):not(:hover) {
-    -moz-image-region: rect(0, 128px, 32px, 96px);
-  }
-}
-
-.tabbrowser-arrowscrollbox > .scrollbutton-up,
-.tabbrowser-arrowscrollbox > .scrollbutton-down {
-  -moz-image-region: rect(0, 13px, 20px, 0);
-  margin: 0 0 var(--tab-toolbar-navbar-overlap);
-  padding: 0 4px;
-  border: none;
-}
-
-.tabbrowser-arrowscrollbox > .scrollbutton-up {
-  border-inline-end: 2px solid transparent;
-}
-
-.tabbrowser-arrowscrollbox > .scrollbutton-down {
-  border-inline-start: 2px solid transparent;
-  transition: 1s background-color ease-out;
-}
-
-.tabbrowser-arrowscrollbox > .scrollbutton-down[notifybgtab] {
-  background-color: Highlight;
-  transition: none;
-}
-
-.tabbrowser-arrowscrollbox > .scrollbutton-up:-moz-locale-dir(ltr),
-.tabbrowser-arrowscrollbox > .scrollbutton-down:-moz-locale-dir(rtl) {
-  list-style-image: url("chrome://browser/skin/tabbrowser/tab-arrow-left.png");
-}
-
-.tabbrowser-arrowscrollbox > .scrollbutton-down:-moz-locale-dir(ltr),
-.tabbrowser-arrowscrollbox > .scrollbutton-up:-moz-locale-dir(rtl) {
-  list-style-image: url("chrome://browser/skin/tabbrowser/tab-arrow-right.png");
-}
-
-#TabsToolbar[brighttext] .tabbrowser-arrowscrollbox > .scrollbutton-up:-moz-locale-dir(ltr),
-#TabsToolbar[brighttext] .tabbrowser-arrowscrollbox > .scrollbutton-down:-moz-locale-dir(rtl) {
-  list-style-image: url("chrome://browser/skin/tabbrowser/tab-arrow-left-inverted.png");
-}
-
-#TabsToolbar[brighttext] .tabbrowser-arrowscrollbox > .scrollbutton-down:-moz-locale-dir(ltr),
-#TabsToolbar[brighttext] .tabbrowser-arrowscrollbox > .scrollbutton-up:-moz-locale-dir(rtl) {
-  list-style-image: url("chrome://browser/skin/tabbrowser/tab-arrow-right-inverted.png");
-}
-
-.tabbrowser-arrowscrollbox > .scrollbutton-up:hover,
-.tabbrowser-arrowscrollbox > .scrollbutton-down:hover {
-  -moz-image-region: rect(0, 26px, 20px, 13px);
-}
-
-.tabbrowser-arrowscrollbox > .scrollbutton-up:hover:active,
-.tabbrowser-arrowscrollbox > .scrollbutton-down:hover:active {
-  -moz-image-region: rect(0, 39px, 20px, 26px);
-}
-
-.tabbrowser-arrowscrollbox > .scrollbutton-up[disabled] > .toolbarbutton-icon,
-.tabbrowser-arrowscrollbox > .scrollbutton-down[disabled] > .toolbarbutton-icon {
-  -moz-image-region: rect(0, 13px, 20px, 0) !important;
-  opacity: .5;
-}
-
-@media (min-resolution: 2dppx) {
-  .tabbrowser-arrowscrollbox > .scrollbutton-up,
-  .tabbrowser-arrowscrollbox > .scrollbutton-down {
-    -moz-image-region: rect(0, 26px, 40px, 0);
-  }
-
-  .tabbrowser-arrowscrollbox > .scrollbutton-up:-moz-locale-dir(ltr),
-  .tabbrowser-arrowscrollbox > .scrollbutton-down:-moz-locale-dir(rtl) {
-    list-style-image: url("chrome://browser/skin/tabbrowser/tab-arrow-left@2x.png");
-  }
-
-  .tabbrowser-arrowscrollbox > .scrollbutton-down:-moz-locale-dir(ltr),
-  .tabbrowser-arrowscrollbox > .scrollbutton-up:-moz-locale-dir(rtl) {
-    list-style-image: url("chrome://browser/skin/tabbrowser/tab-arrow-right@2x.png");
-  }
-
-  #TabsToolbar[brighttext] .tabbrowser-arrowscrollbox > .scrollbutton-up:-moz-locale-dir(ltr),
-  #TabsToolbar[brighttext] .tabbrowser-arrowscrollbox > .scrollbutton-down:-moz-locale-dir(rtl) {
-    list-style-image: url("chrome://browser/skin/tabbrowser/tab-arrow-left-inverted@2x.png");
-  }
-
-  #TabsToolbar[brighttext] .tabbrowser-arrowscrollbox > .scrollbutton-down:-moz-locale-dir(ltr),
-  #TabsToolbar[brighttext] .tabbrowser-arrowscrollbox > .scrollbutton-up:-moz-locale-dir(rtl) {
-    list-style-image: url("chrome://browser/skin/tabbrowser/tab-arrow-right-inverted@2x.png");
-  }
-
-  .tabbrowser-arrowscrollbox > .scrollbutton-up:hover,
-  .tabbrowser-arrowscrollbox > .scrollbutton-down:hover {
-    -moz-image-region: rect(0, 52px, 40px, 26px);
-  }
-
-  .tabbrowser-arrowscrollbox > .scrollbutton-up:hover:active,
-  .tabbrowser-arrowscrollbox > .scrollbutton-down:hover:active {
-    -moz-image-region: rect(0, 78px, 40px, 52px);
-  }
-
-  .tabbrowser-arrowscrollbox > .scrollbutton-up[disabled] > .toolbarbutton-icon,
-  .tabbrowser-arrowscrollbox > .scrollbutton-down[disabled] > .toolbarbutton-icon {
-    -moz-image-region: rect(0, 26px, 40px, 0) !important;
-  }
-
-  .tabbrowser-arrowscrollbox > .scrollbutton-up > .toolbarbutton-icon,
-  .tabbrowser-arrowscrollbox > .scrollbutton-down > .toolbarbutton-icon {
-    width: 13px;
-  }
-}
-
-/**
- * Tabstrip & add-on bar toolbar buttons
- */
-
-#TabsToolbar .toolbarbutton-1,
-#TabsToolbar .toolbarbutton-1 > .toolbarbutton-menubutton-button,
-#TabsToolbar .toolbarbutton-1 > .toolbarbutton-menubutton-dropmarker {
-  -moz-appearance: none;
-  margin: 0;
-  /* !important flags needed because of bug 561154: */
-  /* Bug 990390: -moz-any is no longer used in the selector so the !important aren't necessary for that anymore. */
-  padding: 0 !important;
-  border: none !important;
-  border-radius: 0 !important;
-  background: none !important;
-  box-shadow: none !important;
-}
-
-#TabsToolbar .toolbarbutton-1:not([type="menu-button"]),
-#TabsToolbar .toolbarbutton-1 > .toolbarbutton-menubutton-button {
-  padding: 0 1px;
-}
-
-#TabsToolbar .toolbarbutton-1 {
-  margin-bottom: var(--tab-toolbar-navbar-overlap);
-}
-
-#TabsToolbar .toolbarbutton-1 > .toolbarbutton-menubutton-dropmarker {
-  padding-left: 4px;
-  padding-right: 4px;
-}
-
-.tabbrowser-arrowscrollbox > .scrollbutton-up:not([disabled]):hover,
-.tabbrowser-arrowscrollbox > .scrollbutton-down:not([disabled]):hover,
-#TabsToolbar .toolbarbutton-1:not([type="menu-button"]):not([disabled=true]):not([open]):hover,
-#TabsToolbar .toolbarbutton-1 > .toolbarbutton-menubutton-button:not([disabled=true]):hover,
-#TabsToolbar .toolbarbutton-1:not([disabled=true]):not([buttonover]):hover > .toolbarbutton-menubutton-dropmarker {
-  background-image: linear-gradient(transparent, rgba(0,0,0,.15)) !important;
-}
-
-.tabbrowser-arrowscrollbox > .scrollbutton-up:not([disabled]):hover:active,
-.tabbrowser-arrowscrollbox > .scrollbutton-down:not([disabled]):hover:active,
-#TabsToolbar .toolbarbutton-1:not([type="menu-button"]):not([disabled=true]):hover:active,
-#TabsToolbar .toolbarbutton-1[type="menu"][open],
-#TabsToolbar .toolbarbutton-1[type="panel"][open],
-#TabsToolbar .toolbarbutton-1 > .toolbarbutton-menubutton-button:not([disabled=true]):hover:active,
-#TabsToolbar .toolbarbutton-1[open]:not([disabled=true]):hover > .toolbarbutton-menubutton-dropmarker {
-  background-image: linear-gradient(transparent, rgba(0,0,0,.3)) !important;
-}
-
-.tabs-newtab-button,
-#TabsToolbar > #new-tab-button,
-#TabsToolbar > toolbarpaletteitem > #new-tab-button {
-  list-style-image: url(chrome://browser/skin/tabbrowser/newtab.png);
-  -moz-image-region: rect(0, 18px, 20px, 0);
-}
-
-#TabsToolbar[brighttext] .tabs-newtab-button,
-#TabsToolbar[brighttext] > #new-tab-button,
-#TabsToolbar[brighttext] > toolbarpaletteitem > #new-tab-button {
-  list-style-image: url(chrome://browser/skin/tabbrowser/newtab-inverted.png);
-}
-
-.tabs-newtab-button:hover,
-#TabsToolbar > #new-tab-button:hover {
-  -moz-image-region: rect(0, 36px, 20px, 18px);
-}
-
-.tabs-newtab-button:hover:active,
-#TabsToolbar > #new-tab-button:hover:active {
-  -moz-image-region: rect(0, 54px, 20px, 36px);
-}
-
-@media (min-resolution: 2dppx) {
-  .tabs-newtab-button,
-  #TabsToolbar > #new-tab-button,
-  #TabsToolbar > toolbarpaletteitem > #new-tab-button {
-    list-style-image: url(chrome://browser/skin/tabbrowser/newtab@2x.png);
-    -moz-image-region: rect(0, 36px, 40px, 0);
-  }
-
-  #TabsToolbar[brighttext] .tabs-newtab-button,
-  #TabsToolbar[brighttext] > #new-tab-button,
-  #TabsToolbar[brighttext] > toolbarpaletteitem > #new-tab-button {
-    list-style-image: url(chrome://browser/skin/tabbrowser/newtab-inverted@2x.png);
-  }
-
-  .tabs-newtab-button:hover,
-  #TabsToolbar > #new-tab-button:hover {
-    -moz-image-region: rect(0, 72px, 40px, 36px);
-  }
-
-  .tabs-newtab-button:hover:active,
-  #TabsToolbar > #new-tab-button:hover:active {
-    -moz-image-region: rect(0, 108px, 40px, 72px);
-  }
-
-  .tabs-newtab-button > .toolbarbutton-icon {
-    width: 40px;
-  }
-
-  #TabsToolbar > #new-tab-button > .toolbarbutton-icon,
-  #TabsToolbar > toolbarpaletteitem > #new-tab-button > .toolbarbutton-icon {
-    width: 18px;
-  }
-}
-
-#alltabs-button {
-  list-style-image: url(chrome://browser/skin/tabbrowser/alltabs-box-bkgnd-icon.png);
-  -moz-image-region: rect(0, 17px, 20px, 0);
-}
-
-#TabsToolbar[brighttext] #alltabs-button {
-  list-style-image: url(chrome://browser/skin/tabbrowser/alltabs-box-bkgnd-icon-inverted.png);
-}
-
-#alltabs-button:not([disabled="true"]):hover {
-  -moz-image-region: rect(0, 34px, 20px, 17px);
-}
-
-#alltabs-button[open="true"]:not([disabled="true"]),
-#alltabs-button:not([disabled="true"]):hover:active {
-  -moz-image-region: rect(0, 51px, 20px, 34px);
-}
-
-@media (min-resolution: 2dppx) {
-  #alltabs-button {
-    list-style-image: url(chrome://browser/skin/tabbrowser/alltabs-box-bkgnd-icon@2x.png);
-    -moz-image-region: rect(0, 34px, 40px, 0);
-  }
-
-  #TabsToolbar[brighttext] #alltabs-button {
-    list-style-image: url(chrome://browser/skin/tabbrowser/alltabs-box-bkgnd-icon-inverted@2x.png);
-  }
-
-  #alltabs-button:not([disabled="true"]):hover {
-    -moz-image-region: rect(0, 68px, 40px, 34px);
-  }
-
-  #alltabs-button[open="true"]:not([disabled="true"]),
-  #alltabs-button:not([disabled="true"]):hover:active {
-    -moz-image-region: rect(0, 102px, 40px, 68px);
-  }
-
-  #alltabs-button > .toolbarbutton-icon {
-    width: 17px;
-  }
-}
-
-#alltabs-button > .toolbarbutton-menu-dropmarker {
-  display: none;
-}
-
-#alltabs-button > .toolbarbutton-icon {
-  margin-inline-end: 2px;
-}
-
-/* All Tabs Menupopup */
-.alltabs-item > .menu-iconic-left > .menu-iconic-icon {
-  list-style-image: url("chrome://mozapps/skin/places/defaultFavicon.png");
-}
-
-.alltabs-item[busy] > .menu-iconic-left > .menu-iconic-icon {
-  list-style-image: url("chrome://global/skin/icons/loading.png") !important;
-}
-
-@media (min-resolution: 2dppx) {
-  .alltabs-item > .menu-iconic-left > .menu-iconic-icon {
-    list-style-image: url("chrome://mozapps/skin/places/defaultFavicon@2x.png");
-  }
-
-  .alltabs-item[busy] > .menu-iconic-left > .menu-iconic-icon {
-    list-style-image: url("chrome://global/skin/icons/loading@2x.png") !important;
-  }
-}
-
-/* Bookmarks toolbar */
-#PlacesToolbarDropIndicator {
-  list-style-image: url(chrome://browser/skin/places/toolbarDropMarker.png);
-}
-
-/* Bookmark drag and drop styles */
-
-.bookmark-item[dragover-into="true"] {
-  background: Highlight !important;
-  color: HighlightText !important;
-}
-
-/* rules for menupopup drop indicators */
-.menupopup-drop-indicator-bar {
-  position: relative;
-  /* these two margins must together compensate the indicator's height */
-  margin-top: -1px;
-  margin-bottom: -1px;
-}
-
-.menupopup-drop-indicator {
-  list-style-image: none;
-  height: 2px;
-  margin-inline-end: -4em;
-  background-color: Highlight;
-}
-
-%include ../shared/notification-icons.inc.css
-
-.notification-anchor-icon:-moz-focusring {
-  box-shadow: 0 0 2px 1px -moz-mac-focusring inset,
-              0 0 3px 2px -moz-mac-focusring;
-}
-
-/* Translation */
-
-%include ../shared/translation/infobar.inc.css
-
-notification[value="translation"] {
-  color: #484848;
-  background-color: #EFEFEF;
-  background-image: none;
-  border-top: none;
-  border-bottom: 1px solid #c4c4c4;
-  padding-top: 1px;
-  padding-bottom: 1px;
-  min-height: 35px;
-}
-
-.translate-infobar-element {
-  margin-top: 0 !important;
-  margin-bottom: 0 !important;
-}
-
-button.translate-infobar-element {
-  background: linear-gradient(rgba(255, 255, 255, 0.8), rgba(255, 255, 255, 0.1)) repeat scroll 0% 0% padding-box transparent;
-  color: #333333;
-  border: 1px solid;
-  border-color: rgba(23, 51, 78, 0.15) rgba(23, 51, 78, 0.17) rgba(23, 51, 78, 0.2);
-  box-shadow: 0px 0px 2px rgba(255, 255, 255, 0.5) inset, 0px 1px 0px rgba(255, 255, 255, 0.2);
-  transition-property: background-color, border-color, box-shadow;
-  transition-duration: 150ms;
-  min-height: 22px;
-  min-width: 0;
-  padding: 0 0.8em !important;
-  margin-left: 0.25em;
-  margin-right: 0.25em;
-}
-
-button.translate-infobar-element .button-text {
-  margin-left: 0 !important;
-  margin-right: 0 !important;
-}
-
-label.translate-infobar-element {
-  padding-top: 2px;
-}
-
-button.translate-infobar-element:hover {
-  background: #f0f0f0;
-  box-shadow: 0 1px 0 hsla(0,0%,100%,.1) inset,  0 0 0 1px hsla(0,0%,100%,.05) inset,  0 1px 0 hsla(210,54%,20%,.01),  0 0 4px hsla(206,100%,20%,.1);
-}
-
-button.translate-infobar-element:active {
-  box-shadow: 0 1px 1px hsla(211,79%,6%,.1) inset,  0 0 1px hsla(211,79%,6%,.2) inset;
-  transition-duration: 0ms;
-}
-
-button.translate-infobar-element[anonid="translate"] {
-  color: #ffffff;
-  background: linear-gradient(#4cb1ff, #1793e5);
-  box-shadow: 0 1px 0 hsla(0,0%,100%,.2) inset,  0 0 0 1px hsla(0,0%,100%,.1) inset,  0 1px 0 hsla(210,54%,20%,.03);
-  border-color: hsla(210,54%,20%,.15) hsla(210,54%,20%,.17) hsla(210,54%,20%,.2);
-  padding: 0 1.1em  !important;;
-}
-
-button.translate-infobar-element[anonid="translate"]:hover {
-  background-image: linear-gradient(#66bdff, #0d9eff);
-  box-shadow: 0 1px 0 hsla(0,0%,100%,.2) inset,  0 0 0 1px hsla(0,0%,100%,.1) inset,  0 1px 0 hsla(210,54%,20%,.03),  0 0 4px hsla(206,100%,20%,.2);
-}
-
-button.translate-infobar-element.options-menu-button {
-  padding-inline-start: 0.5em !important;
-  padding-inline-end: 0em !important;
-}
-
-button.translate-infobar-element.options-menu-button > .button-box > .button-menu-dropmarker {
-  display: -moz-box;
-  list-style-image: url("chrome://global/skin/icons/glyph-dropdown.png");
-  padding: 0 !important;
-  margin: 0 !important;
-}
-
-@media (min-resolution: 2dppx) {
-  button.translate-infobar-element.options-menu-button > .button-box > .button-menu-dropmarker {
-    list-style-image: url("chrome://global/skin/icons/glyph-dropdown@2x.png");
-  }
-
-  button.translate-infobar-element.options-menu-button > .button-box > .button-menu-dropmarker > .dropmarker-icon {
-    width: 8px;
-  }
-}
-
-menulist.translate-infobar-element {
-  text-shadow: 0 1px 1px #FEFFFE;
-  border: 1px solid;
-  border-color: rgba(23, 51, 78, 0.15) rgba(23, 51, 78, 0.17) rgba(23, 51, 78, 0.2);
-  box-shadow: 0 1px 1px 0 #FFFFFF, inset 0 2px 2px 0 #FFFFFF;
-  background-color: #F1F1F1;
-  background-image: linear-gradient(#FFFFFF, rgba(255,255,255,0.1));
-  color: #333333;
-  padding: 0;
-  min-height: 22px !important;
-}
-
-menulist.translate-infobar-element > .menulist-label-box {
-  padding-top: 1px;
-  padding-inline-start: 0.3em;
-  margin-top: 0;
-  margin-bottom: 0;
-}
-
-menulist.translate-infobar-element:hover {
-  background: #f0f0f0;
-  box-shadow: 0 1px 0 hsla(0,0%,100%,.1) inset,  0 0 0 1px hsla(0,0%,100%,.05) inset,  0 1px 0 hsla(210,54%,20%,.01),  0 0 4px hsla(206,100%,20%,.1);
-}
-
-menulist.translate-infobar-element[open="true"] {
-  background-image: linear-gradient(rgba(255,255,255,0.1),
-                                    rgba(255,255,255,0.6));
-}
-
-menulist.translate-infobar-element > .menulist-dropmarker {
-  display: -moz-box;
-  list-style-image: url("chrome://global/skin/icons/glyph-dropdown.png");
-}
-
-@media (min-resolution: 2dppx) {
-  menulist.translate-infobar-element > .menulist-dropmarker {
-    list-style-image: url("chrome://global/skin/icons/glyph-dropdown@2x.png");
-  }
-
-  menulist.translate-infobar-element > .menulist-dropmarker > .dropmarker-icon {
-    width: 8px;
-  }
-}
-
-.popup-notification-body[popupid="addon-progress"],
-.popup-notification-body[popupid="addon-install-confirmation"] {
-  width: 28em;
-  max-width: 28em;
-}
-
-.addon-install-confirmation-name {
-  font-weight: bold;
-}
-
-/* Status panel */
-
-.statuspanel-label {
-  margin: 0;
-  padding: 2px 4px;
-  background: linear-gradient(#fff, #ddd);
-  border: 1px none #ccc;
-  border-top-style: solid;
-  color: #333;
-  text-shadow: none;
-}
-
-.statuspanel-label:-moz-locale-dir(ltr):not([mirror]),
-.statuspanel-label:-moz-locale-dir(rtl)[mirror] {
-  border-right-style: solid;
-  border-top-right-radius: .3em;
-  margin-right: 1em;
-}
-
-.statuspanel-label:-moz-locale-dir(rtl):not([mirror]),
-.statuspanel-label:-moz-locale-dir(ltr)[mirror] {
-  border-left-style: solid;
-  border-top-left-radius: .3em;
-  margin-left: 1em;
-}
-
-%include ../shared/fullscreen/warning.inc.css
-%include ../shared/ctrlTab.inc.css
-%include ../../../devtools/client/themes/responsivedesign.inc.css
-%include ../../../devtools/client/themes/commandline.inc.css
-%include ../shared/plugin-doorhanger.inc.css
-
-%include downloads/indicator.css
-
-/* On mac, the popup notification contents are indented by default and so
-  the default closebutton margins from notification.css require adjustment */
-
-.click-to-play-plugins-notification-description-box > .popup-notification-closebutton {
-  margin-inline-end: -6px;
-  margin-top: -7px;
-}
-
-
-
-.gclitoolbar-input-node > .textbox-input-box > html|*.textbox-input::-moz-selection {
-  color: hsl(210,11%,16%);
-}
-
-/* Error counter */
-
-#developer-toolbar-toolbox-button[error-count]:before {
-  color: #FDF3DE;
-  min-width: 16px;
-  text-shadow: none;
-  background-image: linear-gradient(#B4211B, #8A1915);
-  border-radius: 1px;
-}
-
-/* Customization mode */
-
-%include ../shared/customizableui/customizeMode.inc.css
-
-#main-window[customizing] {
-  background-color: rgb(178,178,178);
-}
-
-#main-window[tabsintitlebar][customize-entered] > #titlebar,
-#main-window[privatebrowsingmode=temporary]:not([tabsintitlebar])[customize-entered] > #titlebar,
-#main-window[customize-entered] > #tab-view-deck {
-  background-image: url("chrome://browser/skin/customizableui/customizeMode-gridTexture.png"),
-                    url("chrome://browser/skin/customizableui/background-noise-toolbar.png"),
-                    linear-gradient(to bottom, rgb(233,233,233), rgb(178,178,178) 40px);
-  background-attachment: fixed;
-}
-
-#main-window[tabsintitlebar][customization-lwtheme] > #titlebar:-moz-lwtheme,
-#main-window[customization-lwtheme] > #tab-view-deck:-moz-lwtheme {
-  background-repeat: no-repeat;
-  background-position: right top;
-  background-attachment: fixed;
-  /* The image will get set from CustomizeMode.jsm */
-  background-image: none;
-  background-color: transparent;
-}
-
-#main-window[customization-lwtheme]:-moz-lwtheme {
-  background-image: url("chrome://browser/skin/customizableui/customizeMode-gridTexture.png"),
-                    url("chrome://browser/skin/customizableui/background-noise-toolbar.png");
-  background-color: rgb(178,178,178);
-  background-repeat: repeat;
-  background-attachment: fixed;
-  background-position: left top;
-}
-
-#main-window[customize-entered] #browser-bottombox,
-#main-window[customize-entered] #navigator-toolbox > toolbar:not(#TabsToolbar),
-#main-window[customize-entered] #customization-container {
-  border: 3px solid hsla(0,0%,0%,.1);
-  border-top-width: 0;
-  background-clip: padding-box;
-  background-origin: padding-box;
-  -moz-border-right-colors: hsla(0,0%,0%,.05) hsla(0,0%,0%,.1) hsla(0,0%,0%,.2);
-  -moz-border-bottom-colors: hsla(0,0%,0%,.05) hsla(0,0%,0%,.1) hsla(0,0%,0%,.2);
-  -moz-border-left-colors: hsla(0,0%,0%,.05) hsla(0,0%,0%,.1) hsla(0,0%,0%,.2);
-}
-
-#main-window[customize-entered] #customization-container,
-#main-window[customize-entered] #navigator-toolbox > toolbar:not(#TabsToolbar) {
-  border-bottom-width: 0;
-}
-
-#main-window[customize-entered] #nav-bar {
-  border-top-left-radius: 2.5px;
-  border-top-right-radius: 2.5px;
-}
-
-/* Compensate for the border set above for this horizontal line. */
-#main-window[customize-entered] #navigator-toolbox::after {
-  margin-left: 3px;
-  margin-right: 3px;
-}
-
-#main-window[customize-entered] #TabsToolbar {
-  background-clip: padding-box;
-  border-right: 3px solid transparent;
-  border-left: 3px solid transparent;
-}
-
-@media (min-resolution: 2dppx) {
-  .customization-lwtheme-menu-theme[defaulttheme] {
-    list-style-image: url(chrome://browser/skin/theme-switcher-icon@2x.png);
-  }
-}
-
-/* End customization mode */
-
-.private-browsing-indicator {
-  background-image: url("chrome://browser/skin/privatebrowsing-mask.png");
-  background-repeat: no-repeat;
-  background-size: 100% auto;
-  width: 38px;
-  height: 28px;
-  /**
-   * The private browsing mask graphic has a 3px flare at the top. The distance
-   * we want between the mask and items on either side is 7px, so we use 4px,
-   * since the other 3px is accounted for by the empty space on either side.
-   */
-  margin-left: 4px;
-  margin-right: 4px;
-}
-
-#titlebar-secondary-buttonbox > .private-browsing-indicator {
-  position: relative;
-}
-
-#main-window[privatebrowsingmode=temporary]:not([tabsintitlebar]) > #titlebar > #titlebar-content > #titlebar-secondary-buttonbox > .private-browsing-indicator {
-  background-image: url("chrome://browser/skin/privatebrowsing-mask-short.png");
-  height: 20px;
-}
-
-#main-window:not([privatebrowsingmode=temporary]) .private-browsing-indicator,
-#main-window[privatebrowsingmode=temporary][inFullscreen] > #titlebar > #titlebar-content > #titlebar-secondary-buttonbox > .private-browsing-indicator,
-#main-window[privatebrowsingmode=temporary]:not([inFullscreen]) > #tab-view-deck > #browser-panel > #navigator-toolbox > #TabsToolbar > .private-browsing-indicator {
-  display: none;
-}
-
-@media (min-resolution: 2dppx) {
-  .private-browsing-indicator {
-    background-image: url("chrome://browser/skin/privatebrowsing-mask@2x.png");
-  }
-  #main-window[privatebrowsingmode=temporary]:not([tabsintitlebar]) > #titlebar > #titlebar-content > #titlebar-secondary-buttonbox > .private-browsing-indicator {
-    background-image: url("chrome://browser/skin/privatebrowsing-mask-short@2x.png");
-  }
-}
-
-#TabsToolbar > .private-browsing-indicator {
-  transform: translateY(calc(-1 * var(--space-above-tabbar)));
-  /* We offset by 38px for mask graphic, plus 4px to account for the
-   * margin-left, which sums to 42px.
-   */
-  margin-right: -42px;
-}
-
-#main-window[privatebrowsingmode=temporary] .titlebar-placeholder[type="fullscreen-button"],
-#main-window[privatebrowsingmode=temporary] > #titlebar > #titlebar-content > #titlebar-secondary-buttonbox > #titlebar-fullscreen-button {
-  margin-left: 0px;
-}
-
-#main-window[privatebrowsingmode=temporary][inFullscreen] .titlebar-placeholder[type="fullscreen-button"] {
-  /* Override display:none for .titlebar-placeholder in fullscreen so we can have consistent
-     position and padding for the private browsing indicator. */
-  display: -moz-box;
-}
-
-#TabsToolbar > .private-browsing-indicator:-moz-locale-dir(rtl) {
-  -moz-box-ordinal-group: 0;
-}
-
-%include ../shared/contextmenu.inc.css
-
-#context-navigation > .menuitem-iconic {
-  padding-left: 0;
-  padding-right: 0;
-}
-
-.browser-extension-panel > .panel-arrowcontainer > .panel-arrowcontent {
-  padding: 0;
-  overflow: hidden;
-}
-
-.cui-widget-panelview[id^=PanelUI-webext-] {
-  border-radius: 3.5px;
-}
-
-.webextension-popup-browser {
-  border-radius: inherit;
-}
diff --git a/browser/themes/osx/click-to-play-warning-stripes.png b/browser/themes/osx/click-to-play-warning-stripes.png
deleted file mode 100644
index 29f15f7b8..000000000
--- a/browser/themes/osx/click-to-play-warning-stripes.png
+++ /dev/null
diff --git a/browser/themes/osx/communicator/communicator.css b/browser/themes/osx/communicator/communicator.css
deleted file mode 100644
index 0b57574fd..000000000
--- a/browser/themes/osx/communicator/communicator.css
+++ /dev/null
@@ -1,6 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-@import url("chrome://global/skin/");
-
diff --git a/browser/themes/osx/communicator/jar.mn b/browser/themes/osx/communicator/jar.mn
deleted file mode 100644
index dfd20c523..000000000
--- a/browser/themes/osx/communicator/jar.mn
+++ /dev/null
@@ -1,7 +0,0 @@
-# This Source Code Form is subject to the terms of the Mozilla Public
-# License, v. 2.0. If a copy of the MPL was not distributed with this
-# file, You can obtain one at http://mozilla.org/MPL/2.0/.
-
-browser.jar:
-% skin communicator classic/1.0 %skin/classic/communicator/
-        skin/classic/communicator/communicator.css
diff --git a/browser/themes/osx/communicator/moz.build b/browser/themes/osx/communicator/moz.build
deleted file mode 100644
index eb4454d28..000000000
--- a/browser/themes/osx/communicator/moz.build
+++ /dev/null
@@ -1,7 +0,0 @@
-# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
-# vim: set filetype=python:
-# This Source Code Form is subject to the terms of the Mozilla Public
-# License, v. 2.0. If a copy of the MPL was not distributed with this
-# file, You can obtain one at http://mozilla.org/MPL/2.0/.
-
-JAR_MANIFESTS += ['jar.mn']
\ No newline at end of file
diff --git a/browser/themes/osx/controlcenter/panel.css b/browser/themes/osx/controlcenter/panel.css
deleted file mode 100644
index b87fa2ac9..000000000
--- a/browser/themes/osx/controlcenter/panel.css
+++ /dev/null
@@ -1,54 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-%include ../shared.inc
-%include ../../shared/controlcenter/panel.inc.css
-
-#identity-popup {
-  margin-top: 1px;
-}
-
-.identity-popup-expander:-moz-focusring {
-  padding: 2px;
-}
-
-.identity-popup-expander:-moz-focusring > .button-box {
-  @hudButtonFocused@
-}
-
-.identity-popup-permission-remove-button:-moz-focusring {
-  box-shadow: @focusRingShadow@;
-}
-
-#identity-popup-multiView > .panel-viewcontainer > .panel-viewstack > .panel-subviews {
-  border-bottom-right-radius: 3.5px;
-}
-
-#identity-popup-multiView > .panel-viewcontainer > .panel-viewstack > .panel-subviews:-moz-locale-dir(rtl) {
-  border-bottom-right-radius: 0;
-  border-bottom-left-radius: 3.5px;
-}
-
-#tracking-action-block,
-#tracking-action-unblock,
-#tracking-action-unblock-private,
-#identity-popup-securityView-body > button {
-  @hudButton@
-  min-height: 30px;
-}
-
-#tracking-action-block:hover:active,
-#tracking-action-unblock:hover:active,
-#tracking-action-unblock-private:hover:active,
-#identity-popup-securityView-body > button:hover:active {
-  @hudButtonPressed@
-}
-
-#tracking-action-block:-moz-focusring,
-#tracking-action-unblock:-moz-focusring,
-#tracking-action-unblock-private:-moz-focusring,
-#identity-popup-securityView-body > button:-moz-focusring {
-  @hudButtonFocused@
-}
-
diff --git a/browser/themes/osx/customizableui/background-noise-toolbar.png b/browser/themes/osx/customizableui/background-noise-toolbar.png
deleted file mode 100644
index d09ba9daf..000000000
--- a/browser/themes/osx/customizableui/background-noise-toolbar.png
+++ /dev/null
diff --git a/browser/themes/osx/customizableui/customize-titleBar-toggle.png b/browser/themes/osx/customizableui/customize-titleBar-toggle.png
deleted file mode 100644
index fb0edd256..000000000
--- a/browser/themes/osx/customizableui/customize-titleBar-toggle.png
+++ /dev/null
diff --git a/browser/themes/osx/customizableui/customize-titleBar-toggle@2x.png b/browser/themes/osx/customizableui/customize-titleBar-toggle@2x.png
deleted file mode 100644
index 7200e74c2..000000000
--- a/browser/themes/osx/customizableui/customize-titleBar-toggle@2x.png
+++ /dev/null
diff --git a/browser/themes/osx/customizableui/customizeMode-gridTexture.png b/browser/themes/osx/customizableui/customizeMode-gridTexture.png
deleted file mode 100644
index a7c2775cf..000000000
--- a/browser/themes/osx/customizableui/customizeMode-gridTexture.png
+++ /dev/null
diff --git a/browser/themes/osx/customizableui/customizeMode-separatorHorizontal.png b/browser/themes/osx/customizableui/customizeMode-separatorHorizontal.png
deleted file mode 100644
index 5e17cb4db..000000000
--- a/browser/themes/osx/customizableui/customizeMode-separatorHorizontal.png
+++ /dev/null
diff --git a/browser/themes/osx/customizableui/customizeMode-separatorVertical.png b/browser/themes/osx/customizableui/customizeMode-separatorVertical.png
deleted file mode 100644
index dc4caee81..000000000
--- a/browser/themes/osx/customizableui/customizeMode-separatorVertical.png
+++ /dev/null
diff --git a/browser/themes/osx/customizableui/panelUI.css b/browser/themes/osx/customizableui/panelUI.css
deleted file mode 100644
index 09f23b398..000000000
--- a/browser/themes/osx/customizableui/panelUI.css
+++ /dev/null
@@ -1,89 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-%include ../../shared/customizableui/panelUI.inc.css
-
-.panel-subviews {
-  background-color: hsla(0,0%,100%,.97);
-}
-
-.panelUI-grid .toolbarbutton-1 {
-  margin-right: 0;
-  margin-left: 0;
-  margin-bottom: 0;
-}
-
-.subviewbutton > .toolbarbutton-text {
-  margin: 2px 0 !important; /* !important for overriding toolbarbutton.css */
-}
-
-.subviewbutton:-moz-any([image],[targetURI],.cui-withicon, .bookmark-item) > .toolbarbutton-text {
-  margin: 2px 6px !important; /* !important for overriding toolbarbutton.css */
-}
-
-.restoreallitem > .toolbarbutton-icon {
-  display: none;
-}
-
-.subviewbutton {
-  padding-inline-start: 18px;
-}
-
-.subviewbutton[checked="true"] {
-  background-position: top 5px left 4px;
-}
-
-.subviewbutton[checked="true"]:-moz-locale-dir(rtl) {
-  background-position: top 5px right 4px;
-}
-
-.subviewbutton:not(:-moz-any([image],[targetURI],.cui-withicon, .bookmark-item)) > .menu-iconic-left {
-  display: none;
-}
-
-menu.subviewbutton,
-menuitem.subviewbutton:not(.panel-subview-footer) {
-  padding-top: 2px;
-  padding-bottom: 2px;
-}
-
-/* Override OSX-specific toolkit styles for the bookmarks panel */
-menu.subviewbutton > .menu-right {
-  margin-inline-end: 0;
-  -moz-appearance: none;
-}
-
-menu.subviewbutton > .menu-right > image {
- /* We don't want the arrow to highlight when the .subviewbutton is hovered,
-  * so we set the -moz-appearance rule on the image
-  * (which doesn't inherit the _moz-menuactive attribute) instead.
-  */
-  -moz-appearance: menuarrow;
-}
-
-.widget-overflow-list .toolbarbutton-1 > .toolbarbutton-menubutton-dropmarker {
-  margin-inline-start: 4px;
-}
-
-.PanelUI-subView menuseparator,
-.cui-widget-panelview menuseparator {
-  padding: 0 !important;
-}
-
-toolbarpaletteitem[place="palette"] > .toolbarbutton-1 > .toolbarbutton-menubutton-button {
-  padding: 3px 1px;
-}
-
-#PanelUI-remotetabs-tabslist > label[itemtype="client"] {
-  padding-inline-start: 6px;
-}
-
-.PanelUI-remotetabs-notabsforclient-label {
-  margin-left: 19px;
-  font-size: 13px;
-}
-
-#PanelUI-remotetabs-tabslist {
-  padding-bottom: 4px;
-}
diff --git a/browser/themes/osx/devedition.css b/browser/themes/osx/devedition.css
deleted file mode 100644
index c7a2bdd71..000000000
--- a/browser/themes/osx/devedition.css
+++ /dev/null
@@ -1,121 +0,0 @@
-% This Source Code Form is subject to the terms of the Mozilla Public
-% License, v. 2.0. If a copy of the MPL was not distributed with this
-% file, You can obtain one at http://mozilla.org/MPL/2.0/.
-
-%include ../shared/devedition.inc.css
-
-:root {
-  --forwardbutton-width: 32px;
-}
-
-/* Use only 1px separator between nav toolbox and page content */
-#navigator-toolbox::after {
-  border-top-style: none;
-  margin-top: -1px;
-}
-
-/* Include extra space on left/right for dragging since there is no space above
-   the tabs */
-#main-window[tabsintitlebar] #TabsToolbar {
-  padding-left: 50px;
-  padding-right: 50px;
-  margin-bottom: 0; /* Don't overlap the inner highlight at the top of the nav-bar */
-}
-
-/* Get rid of 1px bright strip at the top of window */
-#main-window[tabsintitlebar] #titlebar-content {
-  background: var(--chrome-background-color);
-}
-
-/* Resize things so that the native titlebar is in line with the tabs */
-#main-window[tabsintitlebar] > #titlebar > #titlebar-content > #titlebar-buttonbox-container,
-#main-window[tabsintitlebar] > #titlebar > #titlebar-content > #titlebar-secondary-buttonbox > #titlebar-fullscreen-button {
-  margin-top: 6px;
-}
-
-/* Square back and forward buttons.  Need !important on these because there
-   are a lot of more specific selectors sprinkled around elsewhere for changing
-   background / shadows for different states */
-#back-button,
-#forward-button {
-  height: 24px !important;
-  box-shadow: none !important;
-  border: 1px solid var(--chrome-nav-bar-controls-border-color) !important;
-  background: var(--chrome-nav-buttons-background) !important;
-}
-
-#forward-button {
-  border-inline-start: none !important;
-  /* browser.css and friends set up the width of the button to be 32px.
-   * They then set margin-left to -2px to ensure the button is not too wide
-   * compared to the back button, and set padding-left to center the icon
-   * correctly.
-   * In our theme, the back and forward buttons are the same width, with the
-   * back button being 32px with 1px border on both sides. To ensure the
-   * forward button's content box looks like it is the same size with width
-   * set to 32px and a 1px border on only 1 side, we overlap by 1px, so both
-   * buttons end up with a content box that looks like it's 30px.
-   */
-  margin-left: -1px;
-  padding-left: 1px;
-}
-
-#forward-button > .toolbarbutton-icon {
-  margin-left: 0;
-  margin-right: 0;
-}
-
-#back-button:hover:not([disabled="true"]),
-#forward-button:hover:not([disabled="true"]) {
-  background: var(--chrome-nav-buttons-hover-background) !important;
-}
-
-#back-button {
-  border-radius: 3px 0 0 3px !important;
-  padding: 0 !important;
-  margin: 0 !important;
-}
-
-#back-button:hover:active:not([disabled="true"]) {
-  -moz-image-region: rect(18px, 54px, 36px, 36px);
-}
-
-/* Use smaller back button icon */
-@media (min-resolution: 2dppx) {
-  #back-button:hover:active:not([disabled="true"]) {
-    -moz-image-region: rect(36px, 108px, 72px, 72px);
-  }
-}
-
-/* Don't use the default background for tabs toolbar */
-#TabsToolbar {
-  -moz-appearance: none !important;
-}
-
-/* Prevent the hover styling from on the identity icon from overlapping the
-   urlbar border. */
-#identity-box {
-  margin-top: -1px !important;
-  margin-bottom: -1px !important;
-  padding-top: 3px !important;
-  padding-bottom: 3px !important;
-}
-
-:root[devtoolstheme="dark"] .findbar-closebutton:not(:hover),
-/* Tab styling - make sure to use an inverted icon for the selected tab
-   (brighttext only covers the unselected tabs) */
-.tab-close-button[selected=true]:not(:hover) {
-  -moz-image-region: rect(0, 64px, 16px, 48px);
-}
-@media (min-resolution: 2dppx) {
-  :root[devtoolstheme="dark"] .findbar-closebutton:not(:hover),
-  .tab-close-button[selected=true]:not(:hover) {
-    -moz-image-region: rect(0, 128px, 32px, 96px);
-  }
-}
-
-.ac-type-icon {
-  /* Left-align the type icon in awesomebar popup results with the icon in the
-     urlbar. */
-  margin-inline-start: 14px;
-}
diff --git a/browser/themes/osx/downloads/allDownloadsViewOverlay.css b/browser/themes/osx/downloads/allDownloadsViewOverlay.css
deleted file mode 100644
index dbdced970..000000000
--- a/browser/themes/osx/downloads/allDownloadsViewOverlay.css
+++ /dev/null
@@ -1,19 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-%include ../../shared/downloads/allDownloadsViewOverlay.inc.css
-
-/*** List items ***/
-
-:root {
-  --downloads-item-height: 6em;
-}
-
-.downloadProgress > .progress-bar {
-  background-color: #3c9af8;
-}
-
-.downloadProgress[paused="true"] > .progress-bar {
-  background-color: #a6a6a6;
-}
diff --git a/browser/themes/osx/downloads/download-glow-menuPanel.png b/browser/themes/osx/downloads/download-glow-menuPanel.png
deleted file mode 100644
index 583dac86e..000000000
--- a/browser/themes/osx/downloads/download-glow-menuPanel.png
+++ /dev/null
diff --git a/browser/themes/osx/downloads/download-glow-menuPanel@2x.png b/browser/themes/osx/downloads/download-glow-menuPanel@2x.png
deleted file mode 100644
index 9b48fbd12..000000000
--- a/browser/themes/osx/downloads/download-glow-menuPanel@2x.png
+++ /dev/null
diff --git a/browser/themes/osx/downloads/download-notification-finish.png b/browser/themes/osx/downloads/download-notification-finish.png
deleted file mode 100644
index 139bf0b53..000000000
--- a/browser/themes/osx/downloads/download-notification-finish.png
+++ /dev/null
diff --git a/browser/themes/osx/downloads/download-notification-finish@2x.png b/browser/themes/osx/downloads/download-notification-finish@2x.png
deleted file mode 100644
index 4a2512181..000000000
--- a/browser/themes/osx/downloads/download-notification-finish@2x.png
+++ /dev/null
diff --git a/browser/themes/osx/downloads/download-notification-start.png b/browser/themes/osx/downloads/download-notification-start.png
deleted file mode 100644
index bd548b183..000000000
--- a/browser/themes/osx/downloads/download-notification-start.png
+++ /dev/null
diff --git a/browser/themes/osx/downloads/download-notification-start@2x.png b/browser/themes/osx/downloads/download-notification-start@2x.png
deleted file mode 100644
index 1d6278050..000000000
--- a/browser/themes/osx/downloads/download-notification-start@2x.png
+++ /dev/null
diff --git a/browser/themes/osx/downloads/downloads.css b/browser/themes/osx/downloads/downloads.css
deleted file mode 100644
index af78dcfe9..000000000
--- a/browser/themes/osx/downloads/downloads.css
+++ /dev/null
@@ -1,49 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-%include ../../shared/downloads/downloads.inc.css
-
-/*** Panel and outer controls ***/
-
-#downloadsPanel {
-  margin-top: -1px;
-}
-
-@keyfocus@ #downloadsSummary:focus,
-@keyfocus@ .downloadsPanelFooterButton:focus {
-  outline: 2px -moz-mac-focusring solid;
-  outline-offset: -2px;
-}
-
-/*** List items and similar elements in the summary ***/
-
-:root {
-  --downloads-item-height: 6em;
-  --downloads-item-font-size-factor: 0.95;
-  --downloads-item-details-opacity: 0.7;
-}
-
-.downloadButton:focus > .button-box {
-  outline: 2px -moz-mac-focusring solid;
-  outline-offset: -2px;
-}
-
-@item@[verdict="Malware"] {
-  color: #aa1b08;
-}
-
-.downloadProgress > .progress-bar {
-  background-color: #3c9af8;
-}
-
-.downloadProgress[paused="true"] > .progress-bar {
-  background-color: #a6a6a6;
-}
-
-/*** Highlighted list items ***/
-
-@keyfocus@ @itemFocused@ {
-  outline: 2px -moz-mac-focusring solid;
-  outline-offset: -2px;
-}
diff --git a/browser/themes/osx/downloads/indicator.css b/browser/themes/osx/downloads/indicator.css
deleted file mode 100644
index eb88f074e..000000000
--- a/browser/themes/osx/downloads/indicator.css
+++ /dev/null
@@ -1,250 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-/*** Status and progress indicator ***/
-
-#downloads-indicator-anchor {
-  min-width: 18px;
-  min-height: 18px;
-}
-
-#downloads-animation-container {
-  min-height: 1px;
-  min-width: 1px;
-  height: 1px;
-  margin-bottom: -1px;
-  /* Makes the outermost animation container element positioned, so that its
-     contents are rendered over the main browser window in the Z order.
-     This is required by the animated event notification. */
-  position: relative;
-  /* The selected tab may overlap #downloads-indicator-notification */
-  z-index: 5;
-}
-
-/*** Main indicator icon ***/
-
-#downloads-indicator-icon {
-  background: -moz-image-rect(url("chrome://browser/skin/Toolbar.png"),
-                              0, 198, 18, 180) center no-repeat;
-}
-
-toolbar[brighttext] #downloads-indicator-icon {
-  background-image: -moz-image-rect(url("chrome://browser/skin/Toolbar-inverted.png"), 0, 198, 18, 180);
-}
-
-#downloads-button[attention="warning"] > .toolbarbutton-badge-stack > .toolbarbutton-badge,
-#downloads-button[attention="severe"] > .toolbarbutton-badge-stack > .toolbarbutton-badge {
-  display: -moz-box;
-  height: 8px;
-  width: 8px;
-  min-width: 0;
-  border-radius: 50%;
-  /* "!important" is necessary to override the rule in toolbarbutton.css */
-  margin-top: -1px !important;
-  margin-right: -2px !important;
-}
-
-#downloads-button[cui-areatype="toolbar"] > .toolbarbutton-badge-stack > .toolbarbutton-badge {
-  height: 7px;
-  width: 7px;
-}
-
-#downloads-button[attention="severe"] > .toolbarbutton-badge-stack > .toolbarbutton-badge {
-  background: #D90000;
-}
-
-#downloads-button[attention="warning"] > .toolbarbutton-badge-stack > .toolbarbutton-badge {
-  background: #FFBF00;
-}
-
-#downloads-button[attention="severe"] > .toolbarbutton-badge-stack > .toolbarbutton-badge:-moz-window-inactive,
-#downloads-button[attention="warning"] > .toolbarbutton-badge-stack > .toolbarbutton-badge:-moz-window-inactive {
-  filter: none;
-}
-
-#downloads-button[attention="success"] > #downloads-indicator-anchor > #downloads-indicator-icon {
-  background-image: -moz-image-rect(url("chrome://browser/skin/Toolbar.png"), 36, 198, 54, 180);
-}
-
-toolbar[brighttext] #downloads-button[attention="success"] > #downloads-indicator-anchor > #downloads-indicator-icon {
-  background-image: -moz-image-rect(url("chrome://browser/skin/Toolbar-inverted.png"), 36, 198, 54, 180);
-}
-
-#downloads-button[cui-areatype="menu-panel"][attention="success"] {
-  list-style-image: url("chrome://browser/skin/downloads/download-glow-menuPanel.png");
-  -moz-image-region: auto;
-}
-
-/* In the next few rules, we use :not([counter]) as a shortcut that is
-   equivalent to -moz-any([progress], [paused]). */
-
-#downloads-button:not([counter]) > #downloads-indicator-anchor > #downloads-indicator-progress-area > #downloads-indicator-counter {
-  background: -moz-image-rect(url("chrome://browser/skin/Toolbar.png"),
-                              0, 198, 18, 180) center no-repeat;
-  background-size: 12px;
-}
-
-toolbar[brighttext] #downloads-button:not([counter]):not([attention="success"]) > #downloads-indicator-anchor > #downloads-indicator-progress-area > #downloads-indicator-counter {
-  background-image: -moz-image-rect(url("chrome://browser/skin/Toolbar-inverted.png"), 0, 198, 18, 180);
-}
-
-#downloads-button:not([counter])[attention="success"] > #downloads-indicator-anchor > #downloads-indicator-progress-area > #downloads-indicator-counter {
-  background-image: -moz-image-rect(url("chrome://browser/skin/Toolbar.png"), 36, 198, 54, 180);
-}
-
-toolbar[brighttext] #downloads-button:not([counter])[attention="success"] > #downloads-indicator-anchor > #downloads-indicator-progress-area > #downloads-indicator-counter {
-  background-image: -moz-image-rect(url("chrome://browser/skin/Toolbar-inverted.png"), 36, 198, 54, 180);
-}
-
-@media (min-resolution: 2dppx) {
-  #downloads-indicator-icon {
-    background-image: -moz-image-rect(url("chrome://browser/skin/Toolbar@2x.png"), 0, 396, 36, 360);
-    background-size: 18px;
-  }
-
-  toolbar[brighttext] #downloads-indicator-icon {
-    background-image: -moz-image-rect(url("chrome://browser/skin/Toolbar-inverted@2x.png"), 0, 396, 36, 360);
-  }
-
-  #downloads-button:not([counter]) > #downloads-indicator-anchor > #downloads-indicator-progress-area > #downloads-indicator-counter {
-    background-image: -moz-image-rect(url("chrome://browser/skin/Toolbar@2x.png"), 0, 396, 36, 360);
-  }
-
-  toolbar[brighttext] #downloads-button:not([counter]) > #downloads-indicator-anchor > #downloads-indicator-progress-area > #downloads-indicator-counter {
-    background-image: -moz-image-rect(url("chrome://browser/skin/Toolbar-inverted@2x.png"),
-                                      0, 396, 36, 360);
-  }
-
-  #downloads-button[attention="success"] > #downloads-indicator-anchor > #downloads-indicator-icon {
-    background-image: -moz-image-rect(url("chrome://browser/skin/Toolbar@2x.png"), 72, 396, 108, 360);
-  }
-
-  toolbar[brighttext] #downloads-button[attention="success"] > #downloads-indicator-anchor > #downloads-indicator-icon {
-    background-image: -moz-image-rect(url("chrome://browser/skin/Toolbar-inverted@2x.png"), 72, 396, 108, 360);
-  }
-
-  #downloads-button[cui-areatype="menu-panel"][attention="success"] {
-    list-style-image: url("chrome://browser/skin/downloads/download-glow-menuPanel@2x.png");
-  }
-
-  #downloads-button:not([counter])[attention="success"] > #downloads-indicator-anchor > #downloads-indicator-progress-area > #downloads-indicator-counter {
-    background-image: -moz-image-rect(url("chrome://browser/skin/Toolbar@2x.png"), 72, 396, 108, 360);
-  }
-
-  toolbar[brighttext] #downloads-button:not([counter])[attention="success"] > #downloads-indicator-anchor > #downloads-indicator-progress-area > #downloads-indicator-counter {
-    background-image: -moz-image-rect(url("chrome://browser/skin/Toolbar-inverted@2x.png"), 72, 396, 108, 360);
-  }
-}
-
-/*** Download notifications ***/
-
-#downloads-indicator-notification {
-  opacity: 0;
-  background-size: 16px;
-  background-position: center;
-  background-repeat: no-repeat;
-  width: 16px;
-  height: 16px;
-}
-
-@keyframes downloadsIndicatorNotificationStartRight {
-  from { opacity: 0; transform: translate(-128px, 128px) scale(8); }
-  20%  { opacity: .85; animation-timing-function: ease-out; }
-  to   { opacity: 0; transform: translate(0) scale(1); }
-}
-
-@keyframes downloadsIndicatorNotificationStartLeft {
-  from { opacity: 0; transform: translate(128px, 128px) scale(8); }
-  20%  { opacity: .85; animation-timing-function: ease-out; }
-  to   { opacity: 0; transform: translate(0) scale(1); }
-}
-
-#downloads-notification-anchor[notification="start"] > #downloads-indicator-notification {
-  background-image: url("chrome://browser/skin/downloads/download-notification-start.png");
-  animation-name: downloadsIndicatorNotificationStartRight;
-  animation-duration: 1s;
-}
-
-@media (min-resolution: 2dppx) {
-  #downloads-notification-anchor[notification="start"] > #downloads-indicator-notification {
-    background-image: url("chrome://browser/skin/downloads/download-notification-start@2x.png");
-  }
-}
-
-#downloads-notification-anchor[notification="start"]:-moz-locale-dir(rtl) > #downloads-indicator-notification {
-  animation-name: downloadsIndicatorNotificationStartLeft;
-}
-
-@keyframes downloadsIndicatorNotificationFinish {
-  from { opacity: 0; transform: scale(1); }
-  20%  { opacity: .65; animation-timing-function: ease-in; }
-  to   { opacity: 0; transform: scale(8); }
-}
-
-#downloads-notification-anchor[notification="finish"] > #downloads-indicator-notification {
-  background-image: url("chrome://browser/skin/downloads/download-notification-finish.png");
-  animation-name: downloadsIndicatorNotificationFinish;
-  animation-duration: 1s;
-}
-
-@media (min-resolution: 2dppx) {
-  #downloads-notification-anchor[notification="finish"] > #downloads-indicator-notification {
-    background-image: url("chrome://browser/skin/downloads/download-notification-finish@2x.png");
-  }
-}
-
-/*** Progress bar and text ***/
-
-#downloads-indicator-counter {
-  height: 9px;
-  margin: -3px 0 0;
-  color: hsl(0,0%,30%);
-  text-shadow: 0 1px 0 hsla(0,0%,100%,.5);
-  font-size: 9px;
-  line-height: 9px;
-  text-align: center;
-}
-
-#downloads-indicator-progress {
-  width: 16px;
-  height: 5px;
-  min-width: 0;
-  min-height: 0;
-  margin-top: 1px;
-  margin-bottom: 2px;
-  border-radius: 2px;
-  box-shadow: 0 1px 0 hsla(0,0%,100%,.4);
-}
-
-#downloads-indicator-progress > .progress-bar {
-  -moz-appearance: none;
-  min-width: 0;
-  min-height: 0;
-  /* The background-clip: border-box; and background-image: none; are there to expand the background-color behind the border */
-  background-clip: padding-box, border-box;
-  background-color: rgb(90, 185, 255);
-  background-image: linear-gradient(transparent 1px, rgba(255, 255, 255, 0.4) 1px, rgba(255, 255, 255, 0.4) 2px, transparent 2px), none;
-  border: 1px solid;
-  border-color: rgba(0,43,86,.6) rgba(0,43,86,.4) rgba(0,43,86,.4);
-  border-radius: 2px 0 0 2px;
-}
-
-#downloads-indicator-progress > .progress-remainder {
-  -moz-appearance: none;
-  min-width: 0;
-  min-height: 0;
-  background-image: linear-gradient(#505050, #575757);
-  border: 1px solid;
-  border-color: hsla(0,0%,0%,.6) hsla(0,0%,0%,.4) hsla(0,0%,0%,.4);
-  border-inline-start: none;
-  border-radius: 0 2px 2px 0;
-}
-
-#downloads-button[paused] > #downloads-indicator-anchor > #downloads-indicator-progress-area > #downloads-indicator-progress > .progress-bar {
-  background-color: rgb(220, 230, 81);
-}
-
-#downloads-button[paused] > #downloads-indicator-anchor > #downloads-indicator-progress-area > #downloads-indicator-progress > .progress-remainder {
-  background-image: linear-gradient(#4b5000, #515700);
-}
diff --git a/browser/themes/osx/feeds/feedIcon.png b/browser/themes/osx/feeds/feedIcon.png
deleted file mode 100644
index 236b5f821..000000000
--- a/browser/themes/osx/feeds/feedIcon.png
+++ /dev/null
diff --git a/browser/themes/osx/feeds/feedIcon16.png b/browser/themes/osx/feeds/feedIcon16.png
deleted file mode 100644
index a489de3bf..000000000
--- a/browser/themes/osx/feeds/feedIcon16.png
+++ /dev/null
diff --git a/browser/themes/osx/feeds/subscribe-ui.css b/browser/themes/osx/feeds/subscribe-ui.css
deleted file mode 100644
index 4d0744b3a..000000000
--- a/browser/themes/osx/feeds/subscribe-ui.css
+++ /dev/null
@@ -1,8 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-.alwaysUse {
-  padding: 3px;
-}
-
diff --git a/browser/themes/osx/feeds/subscribe.css b/browser/themes/osx/feeds/subscribe.css
deleted file mode 100644
index 6d1fa8da2..000000000
--- a/browser/themes/osx/feeds/subscribe.css
+++ /dev/null
@@ -1,178 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-html {
-  background: -moz-Dialog;
-  font: 3mm tahoma,arial,helvetica,sans-serif;
-}
-
-#subscribeUsingDescription,
-#subscribeButton {
-  display: block;
-}
-
-#subscribeUsingDescription {
-  margin-bottom: 0.5em;
-}
-
-#subscribeButton {
-  margin-top: 0.5em;
-  margin-inline-start: auto;
-}
-
-#feedBody {
-  border: 1px solid THreeDShadow;
-  padding: 3em;
-  padding-inline-start: 30px;
-  margin: 2em auto;
-  background: -moz-Field;
-}
-
-#feedHeaderContainer {
-  display: flex;
-}
-
-#feedHeaderContainerSpacer {
-  flex-grow: 1;
-}
-
-#feedHeader {
-  border: 1px solid ThreeDShadow;
-  border-radius: 10px;
-  padding-top: 4em;
-  padding-bottom: .3em;
-  padding-inline-start: .3em;
-  padding-inline-end: .3em;
-  margin: -4em auto 0 auto;
-  font-size: 110%;
-  color: InfoText;
-  padding: 5em 3em 0 3em;
-}
-
-.feedBackground {
-  background: url("chrome://browser/skin/feeds/feedIcon.png") 1.4em 5.9em no-repeat rgb(255,255,225);
-}
-
-.videoPodcastBackground {
-  background: url("chrome://browser/skin/feeds/videoFeedIcon.png") 1.4em 5.9em no-repeat rgb(255,255,225);
-}
-
-.audioPodcastBackground {
-  background: url("chrome://browser/skin/feeds/audioFeedIcon.png") 1.4em 5.9em no-repeat rgb(255,255,225);
-}
-
-#feedHeader[firstrun="true"] #feedIntroText {
-  display: block;
-}
-
-#feedIntroText {
-  display: none;
-  margin-inline-start: 2em;
-}
-
-#feedSubscribeLine {
-  padding: 0 1em 1em 2em;
-}
-
-#feedHeader[firstrun="true"] #feedSubscribeLine {
-  padding-left: 3.7em;
-}
-
-/* Don't print subscription UI */
-@media print {
-  #feedHeaderContainer {
-    display: none;
-  }
-}
-
-body {
-  margin: 0;
-  padding: 0 3em;
-  color: -moz-fieldText;
-  font: message-box;
-}
-
-h1 {
-  font-size: 160%;
-  border-bottom: 2px solid ThreeDLightShadow;
-  margin: 0 0 .2em 0;
-}
-
-h2 {
-  color: #C0C0C0;
-  font-size: 110%;
-  font-weight: normal;
-  margin: 0 0 .6em 0;
-}
-
-#feedTitleLink {
-  float: right;
-  margin-inline-start: .6em;
-  margin-inline-end: 0;
-  margin-top: 0;
-  margin-bottom: 0;
-}
-
-a[href] img {
-  border: none;
-}
-
-#feedTitleContainer {
-  margin-inline-start: 0;
-  margin-inline-end: .6em;
-  margin-top: 0;
-  margin-bottom: 0;
-}
-
-#feedTitleImage {
-  margin-inline-start: .6em;
-  margin-inline-end: 0;
-  margin-top: 0;
-  margin-bottom: 0;
-  max-width: 300px;
-  max-height: 150px;
-}
-
-.feedEntryContent {
-  font-size: 110%;
-}
-
-.link {
-  color: #0000FF;
-  text-decoration: underline;
-  cursor: pointer;
-  margin-top: -2px;
-}
-
-.link:hover:active {
-  color: #FF0000;
-}
-
-.lastUpdated {
-  font-size: 85%;
-  font-weight: normal;
-}
-
-.type-icon {
-  vertical-align: bottom;
-  height: 16px;
-  width: 16px;
-}
-
-.enclosures {
-  border: 1px solid THreeDShadow;
-  padding: 1em;
-  margin: 1em auto;
-  background: -moz-Dialog;
-}
-
-.enclosure {
-  vertical-align: middle;
-  margin-left: 2px;
-}
-
-.handlersMenuList > .menulist-label-box > .menulist-icon {
-  max-width: 16px;
-  max-height: 16px;
-}
diff --git a/browser/themes/osx/jar.mn b/browser/themes/osx/jar.mn
deleted file mode 100644
index 27802843d..000000000
--- a/browser/themes/osx/jar.mn
+++ /dev/null
@@ -1,228 +0,0 @@
-# This Source Code Form is subject to the terms of the Mozilla Public
-# License, v. 2.0. If a copy of the MPL was not distributed with this
-# file, You can obtain one at http://mozilla.org/MPL/2.0/.
-
-browser.jar:
-% skin browser classic/1.0 %skin/classic/browser/
-#include ../shared/jar.inc.mn
-  skin/classic/browser/sanitizeDialog.css
-  skin/classic/browser/aboutSessionRestore-window-icon.png
-  skin/classic/browser/aboutSyncTabs.css
-* skin/classic/browser/syncedtabs/sidebar.css          (syncedtabs/sidebar.css)
-  skin/classic/browser/actionicon-tab.png
-  skin/classic/browser/actionicon-tab@2x.png
-* skin/classic/browser/browser.css
-* skin/classic/browser/devedition.css
-* skin/classic/browser/browser-lightweightTheme.css
-  skin/classic/browser/click-to-play-warning-stripes.png
-  skin/classic/browser/Info.png
-  skin/classic/browser/keyhole-circle.png
-  skin/classic/browser/keyhole-circle@2x.png
-  skin/classic/browser/subtle-pattern.png
-  skin/classic/browser/menu-back.png
-  skin/classic/browser/menu-forward.png
-  skin/classic/browser/menuPanel-customize.png
-  skin/classic/browser/menuPanel-customize@2x.png
-  skin/classic/browser/menuPanel-exit.png
-  skin/classic/browser/menuPanel-exit@2x.png
-  skin/classic/browser/menuPanel-help.png
-  skin/classic/browser/menuPanel-help@2x.png
-  skin/classic/browser/panel-expander-closed.png
-  skin/classic/browser/panel-expander-closed@2x.png
-  skin/classic/browser/panel-expander-open.png
-  skin/classic/browser/panel-expander-open@2x.png
-  skin/classic/browser/panel-plus-sign.png
-  skin/classic/browser/page-livemarks.png
-  skin/classic/browser/page-livemarks@2x.png
-  skin/classic/browser/pageInfo.css
-  skin/classic/browser/privatebrowsing-mask.png
-  skin/classic/browser/privatebrowsing-mask@2x.png
-  skin/classic/browser/privatebrowsing-mask-short.png
-  skin/classic/browser/privatebrowsing-mask-short@2x.png
-  skin/classic/browser/reload-stop-go.png
-  skin/classic/browser/reload-stop-go@2x.png
-  skin/classic/browser/searchbar.css
-  skin/classic/browser/slowStartup-16.png
-  skin/classic/browser/Toolbar.png
-  skin/classic/browser/Toolbar@2x.png
-  skin/classic/browser/Toolbar-inverted.png
-  skin/classic/browser/Toolbar-inverted@2x.png
-  skin/classic/browser/toolbarbutton-dropmarker.png
-  skin/classic/browser/urlbar-history-dropmarker.png
-  skin/classic/browser/urlbar-history-dropmarker@2x.png
-  skin/classic/browser/urlbar-popup-blocked.png
-  skin/classic/browser/urlbar-popup-blocked@2x.png
-  skin/classic/browser/webRTC-sharingDevice-menubar.png
-  skin/classic/browser/webRTC-sharingDevice-menubar@2x.png
-  skin/classic/browser/webRTC-sharingMicrophone-menubar.png
-  skin/classic/browser/webRTC-sharingMicrophone-menubar@2x.png
-  skin/classic/browser/webRTC-sharingScreen-menubar.png
-  skin/classic/browser/webRTC-sharingScreen-menubar@2x.png
-  skin/classic/browser/webRTC-indicator.css
-* skin/classic/browser/controlcenter/panel.css        (controlcenter/panel.css)
-  skin/classic/browser/customizableui/background-noise-toolbar.png  (customizableui/background-noise-toolbar.png)
-  skin/classic/browser/customizableui/customize-titleBar-toggle.png  (customizableui/customize-titleBar-toggle.png)
-  skin/classic/browser/customizableui/customize-titleBar-toggle@2x.png  (customizableui/customize-titleBar-toggle@2x.png)
-  skin/classic/browser/customizableui/customizeMode-gridTexture.png  (customizableui/customizeMode-gridTexture.png)
-  skin/classic/browser/customizableui/customizeMode-separatorHorizontal.png  (customizableui/customizeMode-separatorHorizontal.png)
-  skin/classic/browser/customizableui/customizeMode-separatorVertical.png  (customizableui/customizeMode-separatorVertical.png)
-* skin/classic/browser/customizableui/panelUI.css    (customizableui/panelUI.css)
-* skin/classic/browser/downloads/allDownloadsViewOverlay.css (downloads/allDownloadsViewOverlay.css)
-  skin/classic/browser/downloads/download-glow-menuPanel.png (downloads/download-glow-menuPanel.png)
-  skin/classic/browser/downloads/download-glow-menuPanel@2x.png (downloads/download-glow-menuPanel@2x.png)
-  skin/classic/browser/downloads/download-notification-finish.png  (downloads/download-notification-finish.png)
-  skin/classic/browser/downloads/download-notification-finish@2x.png  (downloads/download-notification-finish@2x.png)
-  skin/classic/browser/downloads/download-notification-start.png  (downloads/download-notification-start.png)
-  skin/classic/browser/downloads/download-notification-start@2x.png  (downloads/download-notification-start@2x.png)
-* skin/classic/browser/downloads/downloads.css              (downloads/downloads.css)
-  skin/classic/browser/feeds/subscribe.css                  (feeds/subscribe.css)
-  skin/classic/browser/feeds/subscribe-ui.css               (feeds/subscribe-ui.css)
-  skin/classic/browser/feeds/feedIcon.png                   (feeds/feedIcon.png)
-  skin/classic/browser/feeds/feedIcon16.png                 (feeds/feedIcon16.png)
-* skin/classic/browser/newtab/newTab.css                    (newtab/newTab.css)
-  skin/classic/browser/setDesktopBackground.css
-  skin/classic/browser/monitor.png
-  skin/classic/browser/monitor_16-10.png
-  skin/classic/browser/places/allBookmarks.png              (places/allBookmarks.png)
-  skin/classic/browser/places/autocomplete-star.png         (places/autocomplete-star.png)
-  skin/classic/browser/places/autocomplete-star@2x.png      (places/autocomplete-star@2x.png)
-* skin/classic/browser/places/places.css                    (places/places.css)
-  skin/classic/browser/places/organizer.css                 (places/organizer.css)
-  skin/classic/browser/places/query.png                     (places/query.png)
-  skin/classic/browser/places/query@2x.png                  (places/query@2x.png)
-  skin/classic/browser/places/bookmarksMenu.png             (places/bookmarksMenu.png)
-  skin/classic/browser/places/bookmarksToolbar.png          (places/bookmarksToolbar.png)
-  skin/classic/browser/places/bookmarksToolbar@2x.png       (places/bookmarksToolbar@2x.png)
-  skin/classic/browser/places/bookmarks-notification-finish.png  (places/bookmarks-notification-finish.png)
-  skin/classic/browser/places/bookmarks-notification-finish@2x.png  (places/bookmarks-notification-finish@2x.png)
-  skin/classic/browser/places/bookmarksToolbar-menuPanel.png    (places/bookmarksToolbar-menuPanel.png)
-  skin/classic/browser/places/bookmarksToolbar-menuPanel@2x.png (places/bookmarksToolbar-menuPanel@2x.png)
-  skin/classic/browser/places/history.png                   (places/history.png)
-  skin/classic/browser/places/history@2x.png                (places/history@2x.png)
-  skin/classic/browser/places/toolbar.png                   (places/toolbar.png)
-  skin/classic/browser/places/toolbarDropMarker.png         (places/toolbarDropMarker.png)
-  skin/classic/browser/places/folderDropArrow.png           (places/folderDropArrow.png)
-  skin/classic/browser/places/folderDropArrow@2x.png        (places/folderDropArrow@2x.png)
-  skin/classic/browser/places/editBookmarkOverlay.css       (places/editBookmarkOverlay.css)
-  skin/classic/browser/places/minus.png                     (places/minus.png)
-  skin/classic/browser/places/minus-active.png              (places/minus-active.png)
-  skin/classic/browser/places/plus.png                      (places/plus.png)
-  skin/classic/browser/places/plus-active.png               (places/plus-active.png)
-  skin/classic/browser/places/starred48.png                 (places/starred48.png)
-  skin/classic/browser/places/starred48@2x.png              (places/starred48@2x.png)
-  skin/classic/browser/places/unstarred48.png               (places/unstarred48.png)
-  skin/classic/browser/places/unfiledBookmarks.png          (places/unfiledBookmarks.png)
-  skin/classic/browser/places/unfiledBookmarks@2x.png       (places/unfiledBookmarks@2x.png)
-  skin/classic/browser/places/tag.png                       (places/tag.png)
-  skin/classic/browser/places/tag@2x.png                    (places/tag@2x.png)
-  skin/classic/browser/places/downloads.png                 (places/downloads.png)
-  skin/classic/browser/places/livemark-item.png             (places/livemark-item.png)
-  skin/classic/browser/preferences/alwaysAsk.png            (preferences/alwaysAsk.png)
-  skin/classic/browser/preferences/application.png          (preferences/application.png)
-  skin/classic/browser/preferences/saveFile.png             (preferences/saveFile.png)
-* skin/classic/browser/preferences/preferences.css          (preferences/preferences.css)
-* skin/classic/browser/preferences/in-content/preferences.css (preferences/in-content/preferences.css)
-* skin/classic/browser/preferences/in-content/dialog.css      (preferences/in-content/dialog.css)
-  skin/classic/browser/preferences/applications.css         (preferences/applications.css)
-  skin/classic/browser/tabbrowser/alltabs-box-bkgnd-icon.png             (tabbrowser/alltabs-box-bkgnd-icon.png)
-  skin/classic/browser/tabbrowser/alltabs-box-bkgnd-icon-inverted.png    (tabbrowser/alltabs-box-bkgnd-icon-inverted.png)
-  skin/classic/browser/tabbrowser/alltabs-box-bkgnd-icon-inverted@2x.png (tabbrowser/alltabs-box-bkgnd-icon-inverted@2x.png)
-  skin/classic/browser/tabbrowser/newtab.png                             (tabbrowser/newtab.png)
-  skin/classic/browser/tabbrowser/newtab@2x.png                          (tabbrowser/newtab@2x.png)
-  skin/classic/browser/tabbrowser/newtab-inverted.png                    (tabbrowser/newtab-inverted.png)
-  skin/classic/browser/tabbrowser/newtab-inverted@2x.png                 (tabbrowser/newtab-inverted@2x.png)
-  skin/classic/browser/tabbrowser/tab-active-middle.png                  (tabbrowser/tab-active-middle.png)
-  skin/classic/browser/tabbrowser/tab-active-middle@2x.png               (tabbrowser/tab-active-middle@2x.png)
-  skin/classic/browser/tabbrowser/tab-arrow-left.png                     (tabbrowser/tab-arrow-left.png)
-  skin/classic/browser/tabbrowser/tab-arrow-left@2x.png                  (tabbrowser/tab-arrow-left@2x.png)
-  skin/classic/browser/tabbrowser/tab-arrow-left-inverted.png            (tabbrowser/tab-arrow-left-inverted.png)
-  skin/classic/browser/tabbrowser/tab-arrow-left-inverted@2x.png         (tabbrowser/tab-arrow-left-inverted@2x.png)
-  skin/classic/browser/tabbrowser/tab-arrow-right.png                    (tabbrowser/tab-arrow-right.png)
-  skin/classic/browser/tabbrowser/tab-arrow-right@2x.png                 (tabbrowser/tab-arrow-right@2x.png)
-  skin/classic/browser/tabbrowser/tab-arrow-right-inverted.png           (tabbrowser/tab-arrow-right-inverted.png)
-  skin/classic/browser/tabbrowser/tab-arrow-right-inverted@2x.png        (tabbrowser/tab-arrow-right-inverted@2x.png)
-  skin/classic/browser/tabbrowser/tab-background-end.png                 (tabbrowser/tab-background-end.png)
-  skin/classic/browser/tabbrowser/tab-background-end@2x.png              (tabbrowser/tab-background-end@2x.png)
-  skin/classic/browser/tabbrowser/tab-background-middle.png              (tabbrowser/tab-background-middle.png)
-  skin/classic/browser/tabbrowser/tab-background-middle@2x.png           (tabbrowser/tab-background-middle@2x.png)
-  skin/classic/browser/tabbrowser/tab-background-start.png               (tabbrowser/tab-background-start.png)
-  skin/classic/browser/tabbrowser/tab-background-start@2x.png            (tabbrowser/tab-background-start@2x.png)
-
-# NOTE: The following two files (tab-selected-end.svg, tab-selected-start.svg) get pre-processed in
-#       Makefile.in with a non-default marker of "%" and the result of that gets packaged.
-  skin/classic/browser/tabbrowser/tab-selected-end.svg                   (tab-selected-end.svg)
-  skin/classic/browser/tabbrowser/tab-selected-start.svg                 (tab-selected-start.svg)
-
-  skin/classic/browser/tabbrowser/tab-stroke-end.png                     (tabbrowser/tab-stroke-end.png)
-  skin/classic/browser/tabbrowser/tab-stroke-end@2x.png                  (tabbrowser/tab-stroke-end@2x.png)
-  skin/classic/browser/tabbrowser/tab-stroke-start.png                   (tabbrowser/tab-stroke-start.png)
-  skin/classic/browser/tabbrowser/tab-stroke-start@2x.png                (tabbrowser/tab-stroke-start@2x.png)
-  skin/classic/browser/tabbrowser/tabDragIndicator.png                   (tabbrowser/tabDragIndicator.png)
-  skin/classic/browser/tabbrowser/tabDragIndicator@2x.png                (tabbrowser/tabDragIndicator@2x.png)
-  skin/classic/browser/sync-16.png
-  skin/classic/browser/sync-32.png
-  skin/classic/browser/sync-bg.png
-  skin/classic/browser/sync-128.png
-  skin/classic/browser/sync-desktopIcon.svg  (../shared/sync-desktopIcon.svg)
-  skin/classic/browser/sync-horizontalbar.png
-  skin/classic/browser/sync-horizontalbar@2x.png
-  skin/classic/browser/sync-mobileIcon.svg  (../shared/sync-mobileIcon.svg)
-  skin/classic/browser/sync-notification-24.png
-  skin/classic/browser/syncSetup.css
-  skin/classic/browser/syncCommon.css
-  skin/classic/browser/syncQuota.css
-  skin/classic/browser/syncProgress-horizontalbar.png
-  skin/classic/browser/syncProgress-horizontalbar@2x.png
-  skin/classic/browser/syncProgress-menuPanel.png
-  skin/classic/browser/syncProgress-menuPanel@2x.png
-  skin/classic/browser/syncProgress-toolbar.png
-  skin/classic/browser/syncProgress-toolbar@2x.png
-  skin/classic/browser/syncProgress-toolbar-inverted.png
-  skin/classic/browser/syncProgress-toolbar-inverted@2x.png
-  skin/classic/browser/Toolbar-background-noise.png         (Toolbar-background-noise.png)
-  skin/classic/browser/lion/toolbarbutton-dropmarker.png    (toolbarbutton-dropmarker-lion.png)
-  skin/classic/browser/toolbarbutton-dropmarker@2x.png      (toolbarbutton-dropmarker-lion@2x.png)
-  skin/classic/browser/lion/tabbrowser/alltabs-box-bkgnd-icon.png      (tabbrowser/alltabs-box-bkgnd-icon-lion.png)
-  skin/classic/browser/tabbrowser/alltabs-box-bkgnd-icon@2x.png        (tabbrowser/alltabs-box-bkgnd-icon-lion@2x.png)
-  skin/classic/browser/lion/places/toolbar.png                         (places/toolbar-lion.png)
-  skin/classic/browser/yosemite/Toolbar.png                            (Toolbar-yosemite.png)
-  skin/classic/browser/yosemite/Toolbar@2x.png                         (Toolbar-yosemite@2x.png)
-  skin/classic/browser/yosemite/menuPanel-customize.png                (menuPanel-customize-yosemite.png)
-  skin/classic/browser/yosemite/menuPanel-customize@2x.png             (menuPanel-customize-yosemite@2x.png)
-  skin/classic/browser/yosemite/menuPanel-exit.png                     (menuPanel-exit-yosemite.png)
-  skin/classic/browser/yosemite/menuPanel-exit@2x.png                  (menuPanel-exit-yosemite@2x.png)
-  skin/classic/browser/yosemite/menuPanel-help.png                     (menuPanel-help-yosemite.png)
-  skin/classic/browser/yosemite/menuPanel-help@2x.png                  (menuPanel-help-yosemite@2x.png)
-  skin/classic/browser/yosemite/reload-stop-go.png                     (reload-stop-go-yosemite.png)
-  skin/classic/browser/yosemite/reload-stop-go@2x.png                  (reload-stop-go-yosemite@2x.png)
-  skin/classic/browser/yosemite/sync-horizontalbar.png                 (sync-horizontalbar-yosemite.png)
-  skin/classic/browser/yosemite/sync-horizontalbar@2x.png              (sync-horizontalbar-yosemite@2x.png)
-  skin/classic/browser/yosemite/tab-selected-end-inactive.svg          (tabbrowser/tab-selected-end-yosemite-inactive.svg)
-  skin/classic/browser/yosemite/tab-selected-start-inactive.svg        (tabbrowser/tab-selected-start-yosemite-inactive.svg)
-  skin/classic/browser/yosemite/tab-active-middle-inactive.png         (tabbrowser/tab-active-middle-yosemite-inactive.png)
-  skin/classic/browser/yosemite/tab-active-middle-inactive@2x.png      (tabbrowser/tab-active-middle-yosemite-inactive@2x.png)
-  skin/classic/browser/yosemite/tab-stroke-end-inactive.png            (tabbrowser/tab-stroke-end-yosemite-inactive.png)
-  skin/classic/browser/yosemite/tab-stroke-end-inactive@2x.png         (tabbrowser/tab-stroke-end-yosemite-inactive@2x.png)
-  skin/classic/browser/yosemite/tab-stroke-start-inactive.png          (tabbrowser/tab-stroke-start-yosemite-inactive.png)
-  skin/classic/browser/yosemite/tab-stroke-start-inactive@2x.png       (tabbrowser/tab-stroke-start-yosemite-inactive@2x.png)
-
-[extensions/{972ce4c6-7e08-4474-a285-3208198ce6fd}] chrome.jar:
-% override chrome://browser/skin/feeds/audioFeedIcon.png                   chrome://browser/skin/feeds/feedIcon.png
-% override chrome://browser/skin/feeds/audioFeedIcon16.png                 chrome://browser/skin/feeds/feedIcon16.png
-% override chrome://browser/skin/feeds/videoFeedIcon.png                   chrome://browser/skin/feeds/feedIcon.png
-% override chrome://browser/skin/feeds/videoFeedIcon16.png                 chrome://browser/skin/feeds/feedIcon16.png
-% override chrome://browser/skin/toolbarbutton-dropmarker.png              chrome://browser/skin/lion/toolbarbutton-dropmarker.png                 os=Darwin osversion>=10.7
-% override chrome://browser/skin/tabbrowser/alltabs-box-bkgnd-icon.png     chrome://browser/skin/lion/tabbrowser/alltabs-box-bkgnd-icon.png        os=Darwin osversion>=10.7
-% override chrome://browser/skin/places/toolbar.png                        chrome://browser/skin/lion/places/toolbar.png                           os=Darwin osversion>=10.7
-% override chrome://browser/skin/Toolbar.png                               chrome://browser/skin/yosemite/Toolbar.png                              os=Darwin osversion>=10.10
-% override chrome://browser/skin/Toolbar@2x.png                            chrome://browser/skin/yosemite/Toolbar@2x.png                           os=Darwin osversion>=10.10
-% override chrome://browser/skin/menuPanel-customize.png                   chrome://browser/skin/yosemite/menuPanel-customize.png                  os=Darwin osversion>=10.10
-% override chrome://browser/skin/menuPanel-customize@2x.png                chrome://browser/skin/yosemite/menuPanel-customize@2x.png               os=Darwin osversion>=10.10
-% override chrome://browser/skin/menuPanel-exit.png                        chrome://browser/skin/yosemite/menuPanel-exit.png                       os=Darwin osversion>=10.10
-% override chrome://browser/skin/menuPanel-exit@2x.png                     chrome://browser/skin/yosemite/menuPanel-exit@2x.png                    os=Darwin osversion>=10.10
-% override chrome://browser/skin/menuPanel-help.png                        chrome://browser/skin/yosemite/menuPanel-help.png                       os=Darwin osversion>=10.10
-% override chrome://browser/skin/menuPanel-help@2x.png                     chrome://browser/skin/yosemite/menuPanel-help@2x.png                    os=Darwin osversion>=10.10
-% override chrome://browser/skin/reload-stop-go.png                        chrome://browser/skin/yosemite/reload-stop-go.png                       os=Darwin osversion>=10.10
-% override chrome://browser/skin/reload-stop-go@2x.png                     chrome://browser/skin/yosemite/reload-stop-go@2x.png                    os=Darwin osversion>=10.10
-% override chrome://browser/skin/sync-horizontalbar.png                    chrome://browser/skin/yosemite/sync-horizontalbar.png               os=Darwin osversion>=10.10
-% override chrome://browser/skin/sync-horizontalbar@2x.png                 chrome://browser/skin/yosemite/sync-horizontalbar@2x.png            os=Darwin osversion>=10.10
diff --git a/browser/themes/osx/keyhole-circle.png b/browser/themes/osx/keyhole-circle.png
deleted file mode 100644
index fc177587f..000000000
--- a/browser/themes/osx/keyhole-circle.png
+++ /dev/null
diff --git a/browser/themes/osx/keyhole-circle@2x.png b/browser/themes/osx/keyhole-circle@2x.png
deleted file mode 100644
index 288702805..000000000
--- a/browser/themes/osx/keyhole-circle@2x.png
+++ /dev/null
diff --git a/browser/themes/osx/menu-back.png b/browser/themes/osx/menu-back.png
deleted file mode 100644
index 82a74c7b8..000000000
--- a/browser/themes/osx/menu-back.png
+++ /dev/null
diff --git a/browser/themes/osx/menu-forward.png b/browser/themes/osx/menu-forward.png
deleted file mode 100644
index b3b40e394..000000000
--- a/browser/themes/osx/menu-forward.png
+++ /dev/null
diff --git a/browser/themes/osx/menuPanel-customize-yosemite.png b/browser/themes/osx/menuPanel-customize-yosemite.png
deleted file mode 100644
index 93b660692..000000000
--- a/browser/themes/osx/menuPanel-customize-yosemite.png
+++ /dev/null
diff --git a/browser/themes/osx/menuPanel-customize-yosemite@2x.png b/browser/themes/osx/menuPanel-customize-yosemite@2x.png
deleted file mode 100644
index 43cde4a68..000000000
--- a/browser/themes/osx/menuPanel-customize-yosemite@2x.png
+++ /dev/null
diff --git a/browser/themes/osx/menuPanel-customize.png b/browser/themes/osx/menuPanel-customize.png
deleted file mode 100644
index b0772d822..000000000
--- a/browser/themes/osx/menuPanel-customize.png
+++ /dev/null
diff --git a/browser/themes/osx/menuPanel-customize@2x.png b/browser/themes/osx/menuPanel-customize@2x.png
deleted file mode 100644
index aba481aeb..000000000
--- a/browser/themes/osx/menuPanel-customize@2x.png
+++ /dev/null
diff --git a/browser/themes/osx/menuPanel-exit-yosemite.png b/browser/themes/osx/menuPanel-exit-yosemite.png
deleted file mode 100644
index 4115b53ec..000000000
--- a/browser/themes/osx/menuPanel-exit-yosemite.png
+++ /dev/null
diff --git a/browser/themes/osx/menuPanel-exit-yosemite@2x.png b/browser/themes/osx/menuPanel-exit-yosemite@2x.png
deleted file mode 100644
index af3160621..000000000
--- a/browser/themes/osx/menuPanel-exit-yosemite@2x.png
+++ /dev/null
diff --git a/browser/themes/osx/menuPanel-exit.png b/browser/themes/osx/menuPanel-exit.png
deleted file mode 100644
index 126cde088..000000000
--- a/browser/themes/osx/menuPanel-exit.png
+++ /dev/null
diff --git a/browser/themes/osx/menuPanel-exit@2x.png b/browser/themes/osx/menuPanel-exit@2x.png
deleted file mode 100644
index 1ccdd65b9..000000000
--- a/browser/themes/osx/menuPanel-exit@2x.png
+++ /dev/null
diff --git a/browser/themes/osx/menuPanel-help-yosemite.png b/browser/themes/osx/menuPanel-help-yosemite.png
deleted file mode 100644
index ad1783de6..000000000
--- a/browser/themes/osx/menuPanel-help-yosemite.png
+++ /dev/null
diff --git a/browser/themes/osx/menuPanel-help-yosemite@2x.png b/browser/themes/osx/menuPanel-help-yosemite@2x.png
deleted file mode 100644
index 4a4c3bcae..000000000
--- a/browser/themes/osx/menuPanel-help-yosemite@2x.png
+++ /dev/null
diff --git a/browser/themes/osx/menuPanel-help.png b/browser/themes/osx/menuPanel-help.png
deleted file mode 100644
index a9b34c132..000000000
--- a/browser/themes/osx/menuPanel-help.png
+++ /dev/null
diff --git a/browser/themes/osx/menuPanel-help@2x.png b/browser/themes/osx/menuPanel-help@2x.png
deleted file mode 100644
index acf2e531c..000000000
--- a/browser/themes/osx/menuPanel-help@2x.png
+++ /dev/null
diff --git a/browser/themes/osx/monitor.png b/browser/themes/osx/monitor.png
deleted file mode 100644
index ad90e5520..000000000
--- a/browser/themes/osx/monitor.png
+++ /dev/null
diff --git a/browser/themes/osx/monitor_16-10.png b/browser/themes/osx/monitor_16-10.png
deleted file mode 100644
index fb3fdbc4f..000000000
--- a/browser/themes/osx/monitor_16-10.png
+++ /dev/null
diff --git a/browser/themes/osx/moz.build b/browser/themes/osx/moz.build
deleted file mode 100644
index b787ab08e..000000000
--- a/browser/themes/osx/moz.build
+++ /dev/null
@@ -1,13 +0,0 @@
-# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
-# vim: set filetype=python:
-# This Source Code Form is subject to the terms of the Mozilla Public
-# License, v. 2.0. If a copy of the MPL was not distributed with this
-# file, You can obtain one at http://mozilla.org/MPL/2.0/.
-
-DIRS += ['communicator']
-
-JAR_MANIFESTS += ['jar.mn']
-
-DEFINES['CAN_DRAW_IN_TITLEBAR'] = 1
-
-include('../tab-svgs.mozbuild')
diff --git a/browser/themes/osx/newtab/newTab.css b/browser/themes/osx/newtab/newTab.css
deleted file mode 100644
index 0a5bace75..000000000
--- a/browser/themes/osx/newtab/newTab.css
+++ /dev/null
@@ -1,14 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-%include ../../shared/newtab/newTab.inc.css
-
-
-.newtab-undo-button {
-  color: rgb(20,79,174);
-}
-
-.newtab-title {
-  font-family: Lucida Grande;
-}
diff --git a/browser/themes/osx/page-livemarks.png b/browser/themes/osx/page-livemarks.png
deleted file mode 100644
index e52645846..000000000
--- a/browser/themes/osx/page-livemarks.png
+++ /dev/null
diff --git a/browser/themes/osx/page-livemarks@2x.png b/browser/themes/osx/page-livemarks@2x.png
deleted file mode 100644
index 7b170897c..000000000
--- a/browser/themes/osx/page-livemarks@2x.png
+++ /dev/null
diff --git a/browser/themes/osx/pageInfo.css b/browser/themes/osx/pageInfo.css
deleted file mode 100644
index 748b7b3fa..000000000
--- a/browser/themes/osx/pageInfo.css
+++ /dev/null
@@ -1,194 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-@import "chrome://global/skin/";
-
-/* View buttons */
-@import "chrome://global/skin/viewbuttons.css";
-
-/* Extensions will provide icons because the view buttons have icons
-   on the windows and linux themes. We don't want to display them */
-.viewButtonIcon {
-  display: none;
-}
-
-deck {
-  padding: 10px 10px 10px 10px;
-}
-
-/* Misc */
-tree {
-  margin: .5em;
-}
-
-.gridSeparator {
-  width: .5em;
-}
-
-textbox {
-  background: transparent !important;
-  border: none;
-  padding: 0px;
-  margin-top: 1px;
-  -moz-appearance: none;
-}
-
-textbox.header {
-  margin-inline-start: 0;
-}
-
-.iframe {
-  margin: .5em;
-  background: white;
-  overflow: auto;
-}
-
-.fixedsize {
-  height: 8.5em;
-}
-
-textbox[disabled] {
-  font-style: italic;
-}
-
-/* General Tab */
-groupbox.collapsable caption .caption-icon {
-  width: 11px;
-  height: 11px;
-  background-repeat: no-repeat;
-  background-position: center;
-  margin-inline-end: 2px;
-  background-image: url("chrome://global/skin/arrow/arrow-dn.gif");
-}
-
-groupbox.collapsable[closed="true"] caption .caption-icon {
-  background-image: url("chrome://global/skin/arrow/arrow-rit.gif");
-}
-
-groupbox tree {
-  margin: 0;
-  border: none;
-}
-
-groupbox.treebox .groupbox-body {
-  padding: 0;
-}
-
-#securityBox description {
-  margin-inline-start: 10px;
-}
-
-#general-security-identity {
-  white-space: pre-wrap;
-  line-height: 2em;
-}
-
-/* Media Tab */
-#imagetree {
-  min-height: 10em;
-  margin-bottom: 0;
-}
-
-#mediaSplitter {
-  background: none;
-}
-
-#mediaGrid {
-  min-height: 9em;
-}
-
-#mediaLabelColumn {
-  min-width: 10em;
-}
-
-#thepreviewimage {
-  margin: 1em;
-}
-
-treechildren::-moz-tree-cell-text(broken) {
-  font-style: italic;
-  color: graytext;
-}
-
-/* Feeds Tab */
-#feedtree {
-  margin-bottom: 0px;
-}
-
-#feedListbox richlistitem {
-  padding-top: 6px;
-  padding-bottom: 6px;
-  padding-inline-start: 7px;
-  padding-inline-end: 7px;
-  min-height: 25px;
-  border-bottom: 1px dotted #C0C0C0;
-}
-
-#feedListbox richlistitem[selected="true"] {
-  background-color: -moz-Dialog;
-  color: -moz-DialogText;
-}
-
-#feedListbox {
-  border: 2px solid;
-  -moz-border-top-colors: ThreeDShadow ThreeDDarkShadow;
-  -moz-border-right-colors: ThreeDHighlight ThreeDLightShadow;
-  -moz-border-bottom-colors: ThreeDHighlight ThreeDLightShadow;
-  -moz-border-left-colors: ThreeDShadow ThreeDDarkShadow;
-}
-
-.feedTitle {
-  font-weight: bold;
-}
-
-/* Permissions Tab */
-#permList {
-  margin-top: .5em;
-  overflow: auto;
-  border: 2px solid;
-  -moz-border-top-colors: ThreeDShadow ThreeDDarkShadow;
-  -moz-border-right-colors: ThreeDHighlight ThreeDLightShadow;
-  -moz-border-bottom-colors: ThreeDHighlight ThreeDLightShadow;
-  -moz-border-left-colors: ThreeDShadow ThreeDDarkShadow;
-  background-color: -moz-field;
-}
-
-.permission {
-  padding-top: 6px;
-  padding-bottom: 6px;
-  padding-inline-start: 7px;
-  padding-inline-end: 7px;
-  min-height: 25px;
-  border-bottom: 1px dotted #C0C0C0;
-}
-
-.permissionLabel {
-  font-weight: bold;
-}
-
-.permission:hover {
-  background-color: -moz-dialog;
-}
-
-/* Security Tab */
-#securityPanel .caption-icon {
-  display: none;
-}
-
-#securityPanel .header {
-  font-size: 120%;
-}
-
-#securityPanel .fieldLabel {
-  margin: 2px 10px 3px;
-}
-
-#securityPanel .fieldValue {
-  font-weight: bold;
-  margin: 2px 10px 3px;
-}
-
-#securityPanel row {
-  -moz-box-align: center;
-}
diff --git a/browser/themes/osx/panel-expander-closed.png b/browser/themes/osx/panel-expander-closed.png
deleted file mode 100644
index f0e97b22e..000000000
--- a/browser/themes/osx/panel-expander-closed.png
+++ /dev/null
diff --git a/browser/themes/osx/panel-expander-closed@2x.png b/browser/themes/osx/panel-expander-closed@2x.png
deleted file mode 100644
index 0e7ded50f..000000000
--- a/browser/themes/osx/panel-expander-closed@2x.png
+++ /dev/null
diff --git a/browser/themes/osx/panel-expander-open.png b/browser/themes/osx/panel-expander-open.png
deleted file mode 100644
index e3febf4ff..000000000
--- a/browser/themes/osx/panel-expander-open.png
+++ /dev/null
diff --git a/browser/themes/osx/panel-expander-open@2x.png b/browser/themes/osx/panel-expander-open@2x.png
deleted file mode 100644
index 391337030..000000000
--- a/browser/themes/osx/panel-expander-open@2x.png
+++ /dev/null
diff --git a/browser/themes/osx/panel-plus-sign.png b/browser/themes/osx/panel-plus-sign.png
deleted file mode 100644
index 375601e68..000000000
--- a/browser/themes/osx/panel-plus-sign.png
+++ /dev/null
diff --git a/browser/themes/osx/places/allBookmarks.png b/browser/themes/osx/places/allBookmarks.png
deleted file mode 100644
index d1abe8192..000000000
--- a/browser/themes/osx/places/allBookmarks.png
+++ /dev/null
diff --git a/browser/themes/osx/places/autocomplete-star.png b/browser/themes/osx/places/autocomplete-star.png
deleted file mode 100644
index 4ad9a95cf..000000000
--- a/browser/themes/osx/places/autocomplete-star.png
+++ /dev/null
diff --git a/browser/themes/osx/places/autocomplete-star@2x.png b/browser/themes/osx/places/autocomplete-star@2x.png
deleted file mode 100644
index 4a9c203ff..000000000
--- a/browser/themes/osx/places/autocomplete-star@2x.png
+++ /dev/null
diff --git a/browser/themes/osx/places/bookmarks-notification-finish.png b/browser/themes/osx/places/bookmarks-notification-finish.png
deleted file mode 100644
index cb4b53e07..000000000
--- a/browser/themes/osx/places/bookmarks-notification-finish.png
+++ /dev/null
diff --git a/browser/themes/osx/places/bookmarks-notification-finish@2x.png b/browser/themes/osx/places/bookmarks-notification-finish@2x.png
deleted file mode 100644
index 8db41cd75..000000000
--- a/browser/themes/osx/places/bookmarks-notification-finish@2x.png
+++ /dev/null
diff --git a/browser/themes/osx/places/bookmarksMenu.png b/browser/themes/osx/places/bookmarksMenu.png
deleted file mode 100644
index c27bd6a6f..000000000
--- a/browser/themes/osx/places/bookmarksMenu.png
+++ /dev/null
diff --git a/browser/themes/osx/places/bookmarksToolbar-menuPanel.png b/browser/themes/osx/places/bookmarksToolbar-menuPanel.png
deleted file mode 100644
index 892125ad3..000000000
--- a/browser/themes/osx/places/bookmarksToolbar-menuPanel.png
+++ /dev/null
diff --git a/browser/themes/osx/places/bookmarksToolbar-menuPanel@2x.png b/browser/themes/osx/places/bookmarksToolbar-menuPanel@2x.png
deleted file mode 100644
index c81710a0e..000000000
--- a/browser/themes/osx/places/bookmarksToolbar-menuPanel@2x.png
+++ /dev/null
diff --git a/browser/themes/osx/places/bookmarksToolbar.png b/browser/themes/osx/places/bookmarksToolbar.png
deleted file mode 100644
index 2047bffe5..000000000
--- a/browser/themes/osx/places/bookmarksToolbar.png
+++ /dev/null
diff --git a/browser/themes/osx/places/bookmarksToolbar@2x.png b/browser/themes/osx/places/bookmarksToolbar@2x.png
deleted file mode 100644
index dd458981e..000000000
--- a/browser/themes/osx/places/bookmarksToolbar@2x.png
+++ /dev/null
diff --git a/browser/themes/osx/places/downloads.png b/browser/themes/osx/places/downloads.png
deleted file mode 100644
index 0756cb680..000000000
--- a/browser/themes/osx/places/downloads.png
+++ /dev/null
diff --git a/browser/themes/osx/places/editBookmarkOverlay.css b/browser/themes/osx/places/editBookmarkOverlay.css
deleted file mode 100644
index 584a830ac..000000000
--- a/browser/themes/osx/places/editBookmarkOverlay.css
+++ /dev/null
@@ -1,94 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-@namespace url("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul");
-@namespace html url("http://www.w3.org/1999/xhtml");
-
-/**** folder menulist ****/
-.folder-icon > .menulist-label-box > .menulist-icon,
-.folder-icon > .menu-iconic-left > .menu-iconic-icon {
-  width: 16px;
-  height: 16px;
-}
-
-.folder-icon > .menu-iconic-left {
-  display: -moz-box;
-}
-
-.folder-icon {
-  list-style-image: url("chrome://global/skin/tree/folder.png") !important;
-}
-
-@media (min-resolution: 2dppx) {
-  .folder-icon {
-    list-style-image: url("chrome://global/skin/tree/folder@2x.png") !important;
-  }
-}
-
-.menulist-icon {
-  margin: 0 !important;
-}
-
-/**** expanders ****/
-
-.expander-up,
-.expander-down {
-  margin: 0 4px 1px 8px;
-  padding: 0;
-}
-
-.expander-up {
-  -moz-appearance: -moz-mac-disclosure-button-open;
-}
-
-.expander-down {
-  -moz-appearance: -moz-mac-disclosure-button-closed;
-}
-
-#editBookmarkPanelContent {
-  min-width: 23em;
-}
-
-#editBMPanel_folderTree {
-  margin: 6px 4px 0 4px;
-}
-
-/* Hide the value column of the tag autocomplete popup
- * leaving only the comment column visible. This is
- * so that only the tag being edited is shown in the
- * popup.
- */
-#editBMPanel_tagsField #treecolAutoCompleteValue {
-  visibility: collapse;
-}
-
-
-/* ----- BOOKMARK PANEL DROPDOWN MENU ITEMS ----- */
-
-#editBMPanel_folderMenuList[selectedIndex="0"],
-#editBMPanel_toolbarFolderItem {
-  list-style-image: url("chrome://browser/skin/places/bookmarksToolbar.png") !important;  
-}
-
-#editBMPanel_folderMenuList[selectedIndex="1"],
-#editBMPanel_bmRootItem {
-  list-style-image: url("chrome://browser/skin/places/bookmarksMenu.png") !important;  
-}
-
-#editBMPanel_folderMenuList[selectedIndex="2"],
-#editBMPanel_unfiledRootItem {
-  list-style-image: url("chrome://browser/skin/places/unfiledBookmarks.png") !important;  
-}
-
-@media (min-resolution: 2dppx) {
-  #editBMPanel_folderMenuList[selectedIndex="0"],
-  #editBMPanel_toolbarFolderItem {
-    list-style-image: url("chrome://browser/skin/places/bookmarksToolbar@2x.png") !important;
-  }
-
-  #editBMPanel_folderMenuList[selectedIndex="2"],
-  #editBMPanel_unfiledRootItem {
-    list-style-image: url("chrome://browser/skin/places/unfiledBookmarks@2x.png") !important;
-  }
-}
diff --git a/browser/themes/osx/places/folderDropArrow.png b/browser/themes/osx/places/folderDropArrow.png
deleted file mode 100644
index 8d722ccd5..000000000
--- a/browser/themes/osx/places/folderDropArrow.png
+++ /dev/null
diff --git a/browser/themes/osx/places/folderDropArrow@2x.png b/browser/themes/osx/places/folderDropArrow@2x.png
deleted file mode 100644
index 9efb6d95d..000000000
--- a/browser/themes/osx/places/folderDropArrow@2x.png
+++ /dev/null
diff --git a/browser/themes/osx/places/history.png b/browser/themes/osx/places/history.png
deleted file mode 100644
index e5a00b56d..000000000
--- a/browser/themes/osx/places/history.png
+++ /dev/null
diff --git a/browser/themes/osx/places/history@2x.png b/browser/themes/osx/places/history@2x.png
deleted file mode 100644
index 684b374ff..000000000
--- a/browser/themes/osx/places/history@2x.png
+++ /dev/null
diff --git a/browser/themes/osx/places/livemark-item.png b/browser/themes/osx/places/livemark-item.png
deleted file mode 100644
index 9184b9518..000000000
--- a/browser/themes/osx/places/livemark-item.png
+++ /dev/null
diff --git a/browser/themes/osx/places/minus-active.png b/browser/themes/osx/places/minus-active.png
deleted file mode 100644
index d43c58fe0..000000000
--- a/browser/themes/osx/places/minus-active.png
+++ /dev/null
diff --git a/browser/themes/osx/places/minus.png b/browser/themes/osx/places/minus.png
deleted file mode 100644
index ba868c1b2..000000000
--- a/browser/themes/osx/places/minus.png
+++ /dev/null
diff --git a/browser/themes/osx/places/organizer.css b/browser/themes/osx/places/organizer.css
deleted file mode 100644
index 4e3682d4c..000000000
--- a/browser/themes/osx/places/organizer.css
+++ /dev/null
@@ -1,319 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-/* Places Organizer Sidebars */
-
-#placesList > treechildren::-moz-tree-row {
-  background-color: transparent;
-  border-color: transparent;
-  padding-bottom: 1px;
-  height: 24px;
-}
-
-#placesList > treechildren::-moz-tree-cell-text {
-  font-size: 12px;
-  margin-inline-end: 6px;
-}
-
-#placesList > treechildren::-moz-tree-row(selected) {  
-  -moz-appearance: -moz-mac-source-list-selection;
-}
-
-#placesList > treechildren::-moz-tree-row(selected,focus) {  
-  -moz-appearance: -moz-mac-active-source-list-selection;
-}
-
-#placesList > treechildren::-moz-tree-row(History),
-#placesList > treechildren::-moz-tree-row(history)  {
-  background-color: blue;
-}
-
-#placesList > treechildren::-moz-tree-cell(separator) {
-  cursor: default;
-}
-
-#placesList > treechildren::-moz-tree-separator {
-  border-top: 1px solid #505d6d;
-  margin: 0 10px;
-}
-
-#placesList > treechildren::-moz-tree-cell-text(selected) {  
-  color: #fff;
-  font-weight: bold;
-}
-
-#placesList > treechildren::-moz-tree-twisty {
-  -moz-appearance: none;
-  padding: 0 2px;
-  list-style-image: url("chrome://global/skin/tree/arrow-disclosure.svg#arrow-disclosure-collapsed");
-}
-
-#placesList > treechildren::-moz-tree-twisty(closed, selected) {
-  list-style-image: url("chrome://global/skin/tree/arrow-disclosure.svg#arrow-disclosure-collapsed-inverted");
-}
-
-#placesList > treechildren::-moz-tree-twisty(open) {
-  list-style-image: url("chrome://global/skin/tree/arrow-disclosure.svg#arrow-disclosure-expanded");
-}
-
-#placesList > treechildren::-moz-tree-twisty(open, selected) {
-  list-style-image: url("chrome://global/skin/tree/arrow-disclosure.svg#arrow-disclosure-expanded-inverted");
-}
-
-#placesList > treechildren:-moz-locale-dir(rtl)::-moz-tree-twisty(closed) {
-  list-style-image: url("chrome://global/skin/tree/arrow-disclosure.svg#arrow-disclosure-collapsed-rtl");
-}
-
-#placesList > treechildren:-moz-locale-dir(rtl)::-moz-tree-twisty(closed, selected) {
-  list-style-image: url("chrome://global/skin/tree/arrow-disclosure.svg#arrow-disclosure-collapsed-inverted-rtl");
-}
-
-@media (-moz-mac-yosemite-theme) {
-  #placesList > treechildren::-moz-tree-cell-text(selected) {
-    color: -moz-dialogtext;
-    font-weight: 500;
-  }
-
-  #placesList > treechildren::-moz-tree-cell-text(selected, focus) {
-    color: #fff;
-  }
-
-  #placesList > treechildren::-moz-tree-twisty(closed, selected) {
-    list-style-image: url("chrome://global/skin/tree/arrow-disclosure.svg#arrow-disclosure-collapsed");
-  }
-
-  #placesList > treechildren::-moz-tree-twisty(closed, selected, focus) {
-    list-style-image: url("chrome://global/skin/tree/arrow-disclosure.svg#arrow-disclosure-collapsed-inverted");
-  }
-
-  #placesList > treechildren::-moz-tree-twisty(open, selected) {
-    list-style-image: url("chrome://global/skin/tree/arrow-disclosure.svg#arrow-disclosure-expanded");
-  }
-
-  #placesList > treechildren::-moz-tree-twisty(open, selected, focus) {
-    list-style-image: url("chrome://global/skin/tree/arrow-disclosure.svg#arrow-disclosure-expanded-inverted");
-  }
-
-  #placesList > treechildren:-moz-locale-dir(rtl)::-moz-tree-twisty(closed, selected) {
-    list-style-image: url("chrome://global/skin/tree/arrow-disclosure.svg#arrow-disclosure-collapsed-rtl");
-  }
-
-  #placesList > treechildren:-moz-locale-dir(rtl)::-moz-tree-twisty(closed, selected, focus) {
-    list-style-image: url("chrome://global/skin/tree/arrow-disclosure.svg#arrow-disclosure-collapsed-inverted-rtl");
-  }
-}
-
-#placesToolbar {
-  padding: 0 4px 3px;
-}
-
-#placesView {
-  border-top: none !important;
-}
-
-#placesView > splitter {
-  border-inline-start: none !important;
-  border-inline-end: 1px solid #b4b4b4;
-  min-width: 1px;
-  width: 3px;
-  margin-inline-start: -3px;
-  position: relative;
-  background-image: none !important;
-}
-
-#placesToolbar > toolbarbutton {
-  list-style-image: url("chrome://browser/skin/places/toolbar.png");
-  margin: 4px 4px 5px;
-  padding: 0;
-  height: 22px;
-  -moz-appearance: toolbarbutton;
-}
-
-#placesToolbar > toolbarbutton > .toolbarbutton-icon {
-  margin: 1px 4px;
-}
-
-#placesToolbar > toolbarbutton:not(#clearDownloadsButton) > .toolbarbutton-text {
-  display: none;
-}
-
-#placesToolbar > toolbarbutton[type="menu"] > .toolbarbutton-menu-dropmarker {
-  list-style-image: url(chrome://browser/skin/toolbarbutton-dropmarker.png);
-  padding: 0;
-  margin-top: 1px;
-  margin-inline-end: 2px;
-}
-
-@media (min-resolution: 2dppx) {
-  #placesToolbar > toolbarbutton[type="menu"] > .toolbarbutton-menu-dropmarker {
-    list-style-image: url(chrome://browser/skin/toolbarbutton-dropmarker@2x.png);
-  }
-
-  #placesToolbar > toolbarbutton[type="menu"] > .toolbarbutton-menu-dropmarker > .dropmarker-icon {
-    width: 7px;
-  }
-}
-
-#placesToolbar > toolbarbutton[disabled="true"] > .toolbarbutton-icon,
-#placesToolbar > toolbarbutton:not(:hover):-moz-window-inactive > .toolbarbutton-icon,
-#placesToolbar > toolbarbutton[type="menu"][disabled="true"] > .toolbarbutton-menu-dropmarker,
-#placesToolbar > toolbarbutton:not(:hover):-moz-window-inactive[type="menu"] > .toolbarbutton-menu-dropmarker {
-  opacity: .5;
-}
-
-#placesToolbar > toolbarbutton:-moz-window-inactive[disabled="true"] > .toolbarbutton-icon,
-#placesToolbar > toolbarbutton:-moz-window-inactive[type="menu"][disabled="true"] > .toolbarbutton-menu-dropmarker {
-  opacity: .25;
-}
-
-#placesToolbar > toolbarbutton > menupopup {
-  margin-top: 1px;
-}
-
-/* back and forward button */
-#back-button:-moz-locale-dir(ltr),
-#forward-button:-moz-locale-dir(rtl) {
-  -moz-image-region: rect(0px, 16px, 16px, 0px);
-  margin-right: 0;
-}
-
-#forward-button:-moz-locale-dir(ltr),
-#back-button:-moz-locale-dir(rtl) {
-  -moz-image-region: rect(0px, 32px, 16px, 16px);
-  margin-left: 0;
-}
-
-#back-button > .toolbarbutton-icon {
-  margin-inline-start: 3px !important;
-  margin-inline-end: 2px !important;
-}
-
-#forward-button > .toolbarbutton-icon {
-  margin-inline-start: 2px !important;
-  margin-inline-end: 3px !important;
-}
-
-/* organize button */
-#organizeButton {
-  -moz-image-region: rect(0px, 48px, 16px, 32px);
-}
-
-/* view button */
-#viewMenu {
-  -moz-image-region: rect(0px, 64px, 16px, 48px);
-}
-
-/* maintenance button */
-#maintenanceButton {
-  -moz-image-region: rect(0px, 80px, 16px, 64px);
-}
-
-/* Root View */
-#placesView {
-  border-top: 1px solid ThreeDDarkShadow;
-  -moz-user-focus: ignore;
-}
-
-/* Place List, Place Content */
-#placesList {
-  -moz-appearance: -moz-mac-source-list;
-  box-shadow: inset -2px 0 0 hsla(0,0%,100%,.2);
-  width: 160px;
-}
-
-@media (-moz-mac-yosemite-theme) {
-  #placesList {
-    box-shadow: none;
-  }
-}
-
-/* Info box */
-#detailsDeck {
-  border-top: 1px solid #919191;
-  background-color: #f0f0f0;
-  padding: 10px;
-}
-
-#placeContent {
-  -moz-appearance: none;
-  border: 0px;
-}
-
-#placeContent > treechildren::-moz-tree-row {
-  border-top: none !important;
-  padding-top: 1px;
-}
-
-#placeContent > treechildren::-moz-tree-row(odd) {
-  background-color: #edf3fe;
-}
-
-#placeContent > treechildren::-moz-tree-row(selected),
-#placeContent > treechildren::-moz-tree-row(odd, selected) {
-  background-color: -moz-mac-secondaryhighlight;
-}
-
-#placeContent > treechildren::-moz-tree-row(selected, focus), 
-#placeContent > treechildren::-moz-tree-row(odd, selected, focus) {
-  background-color: Highlight;
-  color: HighlightText !important;
-}
-
-#placeContent > treechildren::-moz-tree-cell,
-#placeContent > treechildren::-moz-tree-column {
-  border-right: 1px solid #d7dad7;
-}
-
-#placeContent > treechildren::-moz-tree-cell(separator) {
-  border-color: transparent;
-}
-
-/**** expanders ****/
-
-.expander-up,
-.expander-down {
-  margin: 0 4px 1px 8px;
-  padding: 0;
-}
-
-.expander-up {
-  -moz-appearance: -moz-mac-disclosure-button-open;
-}
-
-.expander-down {
-  -moz-appearance: -moz-mac-disclosure-button-closed;
-}
-
-/**
- * info pane
- */
-
-#infoBoxExpander {
-  margin: 2px;
-}
-
-#infoBoxExpanderLabel {
-  display: none;
-}
-
-#itemsCountText,
-#selectItemDescription {
-  color: GrayText;
-}
-
-.editBMPanel_rowLabel {
-  text-align: end;
-}
-
-/**
- * Downloads pane
- */
-
-#clearDownloadsButton {
-  list-style-image: none !important;
-}
-
-#clearDownloadsButton > .toolbarbutton-icon {
-  display: none;
-}
diff --git a/browser/themes/osx/places/places.css b/browser/themes/osx/places/places.css
deleted file mode 100644
index 5eaad2791..000000000
--- a/browser/themes/osx/places/places.css
+++ /dev/null
@@ -1,280 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-%include ../shared.inc
-
-/* Sidebars */
-
-#bookmarksPanel, 
-#history-panel,
-#sidebar-search-container,
-#tabs-panel {
-  -moz-appearance: none !important;
-  background-color: transparent !important;
-  border-top: none !important;
-}
-
-.sidebar-placesTree,
-.sidebar-placesTreechildren::-moz-tree-row {
-  padding-bottom: 1px;
-  margin: 0;
-  height: 24px;
-  font-size: 12px;
-}
-
-.sidebar-placesTree {
-  -moz-appearance: -moz-mac-source-list;
-}
-
-.sidebar-placesTreechildren {
-  border-top: 1px solid #bebebe;
-}
-
-.sidebar-placesTreechildren::-moz-tree-separator {
-  border-top: 1px solid #505d6d;
-  margin: 0 10px;
-}
-
-.sidebar-placesTreechildren::-moz-tree-row {
-  background-color: transparent;
-}
-
-.sidebar-placesTreechildren::-moz-tree-row(selected) {
-  -moz-appearance: -moz-mac-source-list-selection;
-}
-
-.sidebar-placesTreechildren::-moz-tree-row(selected,focus) {
-  -moz-appearance: -moz-mac-active-source-list-selection;
-}
-
-.sidebar-placesTreechildren::-moz-tree-cell-text {
-  margin-inline-end: 6px;
-}
-
-.sidebar-placesTreechildren::-moz-tree-cell-text(selected) {
-  color: #fff;
-  font-weight: bold;
-}
-
-#sidebar-search-label {
-  display: none;
-}
-
-.sidebar-placesTreechildren::-moz-tree-twisty {
-  -moz-appearance: none;
-  padding: 0 2px;
-  list-style-image: url("chrome://global/skin/tree/arrow-disclosure.svg#arrow-disclosure-collapsed");
-}
-
-.sidebar-placesTreechildren::-moz-tree-twisty(closed, selected) {
-  list-style-image: url("chrome://global/skin/tree/arrow-disclosure.svg#arrow-disclosure-collapsed-inverted");
-}
-
-.sidebar-placesTreechildren::-moz-tree-twisty(open) {
-  list-style-image: url("chrome://global/skin/tree/arrow-disclosure.svg#arrow-disclosure-expanded");
-}
-
-.sidebar-placesTreechildren::-moz-tree-twisty(open, selected) {
-  list-style-image: url("chrome://global/skin/tree/arrow-disclosure.svg#arrow-disclosure-expanded-inverted");
-}
-
-.sidebar-placesTreechildren:-moz-locale-dir(rtl)::-moz-tree-twisty(closed) {
-  list-style-image: url("chrome://global/skin/tree/arrow-disclosure.svg#arrow-disclosure-collapsed-rtl");
-}
-
-.sidebar-placesTreechildren:-moz-locale-dir(rtl)::-moz-tree-twisty(closed, selected) {
-  list-style-image: url("chrome://global/skin/tree/arrow-disclosure.svg#arrow-disclosure-collapsed-inverted-rtl");
-}
-
-@media (-moz-mac-yosemite-theme) {
-  .sidebar-placesTreechildren::-moz-tree-cell-text(selected) {
-    color: -moz-dialogtext;
-    font-weight: 500;
-  }
-
-  .sidebar-placesTreechildren::-moz-tree-cell-text(selected, focus) {
-    color: #fff;
-  }
-
-  .sidebar-placesTreechildren::-moz-tree-twisty(closed, selected) {
-    list-style-image: url("chrome://global/skin/tree/arrow-disclosure.svg#arrow-disclosure-collapsed");
-  }
-
-  .sidebar-placesTreechildren::-moz-tree-twisty(closed, selected, focus) {
-    list-style-image: url("chrome://global/skin/tree/arrow-disclosure.svg#arrow-disclosure-collapsed-inverted");
-  }
-
-  .sidebar-placesTreechildren::-moz-tree-twisty(open, selected) {
-    list-style-image: url("chrome://global/skin/tree/arrow-disclosure.svg#arrow-disclosure-expanded");
-  }
-
-  .sidebar-placesTreechildren::-moz-tree-twisty(open, selected, focus) {
-    list-style-image: url("chrome://global/skin/tree/arrow-disclosure.svg#arrow-disclosure-expanded-inverted");
-  }
-
-  .sidebar-placesTreechildren:-moz-locale-dir(rtl)::-moz-tree-twisty(closed, selected) {
-    list-style-image: url("chrome://global/skin/tree/arrow-disclosure.svg#arrow-disclosure-collapsed-rtl");
-  }
-
-  .sidebar-placesTreechildren:-moz-locale-dir(rtl)::-moz-tree-twisty(closed, selected, focus) {
-    list-style-image: url("chrome://global/skin/tree/arrow-disclosure.svg#arrow-disclosure-collapsed-inverted-rtl")
-  }
-}
-
-#viewButton {
-  -moz-appearance: none;
-  padding-bottom: 1px;
-  padding-inline-start: 5px;
-  padding-inline-end: 0px;
-  margin: 0;
-  margin-inline-end: 4px;
-  min-width: 0px;
-  min-height: 0px;
-  border: 1px solid #a2a9b1;
-  border-radius: 10px;
-  background-image: linear-gradient(hsla(0,0%,100%,.75),hsla(0,0%,100%,.1));
-  box-shadow: inset 0 0 1px hsla(0,0%,100%,.85),
-                    0 1px hsla(0,0%,100%,.35);
-}
-
-#viewButton:hover:active,
-#viewButton[open=true] {
-  background-image: linear-gradient(hsla(0,0%,100%,.1),hsla(0,0%,100%,.75));
-  box-shadow: @roundButtonPressedShadow@;
-  color: -moz-dialogText;
-}
-
-#viewButton:-moz-window-inactive {
-  border-color: #b6b6b6;
-  background-image: linear-gradient(hsla(0,0%,100%,.3),hsla(0,0%,100%,0));
-}
-
-#viewButton .button-menu-dropmarker {
-  display: -moz-box;
-  list-style-image: url("chrome://global/skin/icons/menulist-dropmarker.png");
-}
-
-#viewButton:focus {
-  box-shadow: 0 1px 0 hsla(0, 0%, 0%, .15),
-              0 0 0 1px hsla(210, 100%, 60%, .45) inset,
-              0 0 0 2px hsla(210, 100%, 60%, .45);
-  border-color: hsla(210, 100%, 60%, 1);
-}
-
-#sidebar-search-container {
-  margin: 0 4px 6px;
-}
-
-/* Trees */
-
-treechildren::-moz-tree-image(title) {
-  list-style-image: url("chrome://mozapps/skin/places/defaultFavicon.png");
-  padding-inline-end: 2px;
-  margin: 0px 2px;
-  width: 16px;
-  height: 16px;
-}
-
-treechildren::-moz-tree-image(title, livemarkItem) {
-  list-style-image: url("chrome://browser/skin/places/livemark-item.png");
-  -moz-image-region: rect(0px, 16px, 16px, 0px);
-}
-
-treechildren::-moz-tree-image(title, livemarkItem, visited) {
-  -moz-image-region: rect(0px, 32px, 16px, 16px);
-}
-
-treechildren::-moz-tree-image(title, container),
-treechildren::-moz-tree-image(title, open) {
-  list-style-image: url("chrome://global/skin/tree/folder.png");
-  -moz-image-region: rect(0, 16px, 16px, 0);
-}
-
-treechildren::-moz-tree-image(title, separator) {
-  list-style-image: none;
-  width: 0 !important;
-  height: 0 !important;
-  margin: 0;
-}
-
-treechildren::-moz-tree-image(container, OrganizerQuery_AllBookmarks) {
-  list-style-image: url("chrome://browser/skin/places/allBookmarks.png");
-}
-
-treechildren::-moz-tree-image(container, livemark) {
-  list-style-image: url("chrome://browser/skin/page-livemarks.png");
-}
-
-treechildren::-moz-tree-image(container, OrganizerQuery_BookmarksToolbar) {
-  list-style-image: url("chrome://browser/skin/places/bookmarksToolbar.png");
-}
-
-treechildren::-moz-tree-image(container, OrganizerQuery_BookmarksMenu) {
-  list-style-image: url("chrome://browser/skin/places/bookmarksMenu.png");
-}
-
-treechildren::-moz-tree-image(container, OrganizerQuery_UnfiledBookmarks) {
-  list-style-image: url("chrome://browser/skin/places/unfiledBookmarks.png");
-}
-
-/* query-nodes should be styled even if they're not expandable */
-treechildren::-moz-tree-image(query) {
-  list-style-image: url("chrome://browser/skin/places/query.png");
-}
-
-treechildren::-moz-tree-image(query, OrganizerQuery_Downloads) {
-  list-style-image: url("chrome://browser/skin/places/downloads.png");
-}
-
-treechildren::-moz-tree-image(title, query, tagContainer),
-treechildren::-moz-tree-image(query, OrganizerQuery_Tags) {
-  list-style-image: url("chrome://browser/skin/places/tag.png");
-}
-
-/* calendar icon for folders grouping items by date */
-treechildren::-moz-tree-image(title, query, dayContainer) {
-  list-style-image: url("chrome://browser/skin/places/history.png");
-}
-
-treechildren::-moz-tree-image(title, query, hostContainer) {
-  list-style-image: url("chrome://global/skin/tree/folder.png");
-}
-
-treechildren::-moz-tree-image(title, query, hostContainer, open) {
-  list-style-image: url("chrome://global/skin/tree/folder.png");
-}
-
-treechildren::-moz-tree-image(query, OrganizerQuery_History) {
-  list-style-image: url("chrome://browser/skin/places/history.png");
-}
-
-/* We want some queries to look like ordinary folders. This must come
-   after the (title, query) selector, or it would get overridden. */
-treechildren::-moz-tree-image(title, query, folder),
-treechildren::-moz-tree-image(title, query, folder, open) {
-  list-style-image: url("chrome://global/skin/tree/folder.png");
-  -moz-image-region: rect(0, 16px, 16px, 0);
-}
-
-treechildren::-moz-tree-cell-text(title, separator) {
-  color: ThreeDShadow;
-  margin: 0px 5px;
-}
-
-treechildren::-moz-tree-cell-text(title, separator, selected, focus) {
-  color: HighlightText;
-}
-
-treechildren::-moz-tree-twisty(title, separator) {
-  -moz-appearance: none;
-  padding: 0px;
-}
-
-treechildren::-moz-tree-image(cutting) {
-  opacity: 0.5;
-}
-
-treechildren::-moz-tree-cell-text(cutting) {
-  opacity: 0.7;
-}
diff --git a/browser/themes/osx/places/plus-active.png b/browser/themes/osx/places/plus-active.png
deleted file mode 100644
index 2d1dd11be..000000000
--- a/browser/themes/osx/places/plus-active.png
+++ /dev/null
diff --git a/browser/themes/osx/places/plus.png b/browser/themes/osx/places/plus.png
deleted file mode 100644
index c1cc60688..000000000
--- a/browser/themes/osx/places/plus.png
+++ /dev/null
diff --git a/browser/themes/osx/places/query.png b/browser/themes/osx/places/query.png
deleted file mode 100644
index 0ccb84702..000000000
--- a/browser/themes/osx/places/query.png
+++ /dev/null
diff --git a/browser/themes/osx/places/query@2x.png b/browser/themes/osx/places/query@2x.png
deleted file mode 100644
index 20b458aac..000000000
--- a/browser/themes/osx/places/query@2x.png
+++ /dev/null
diff --git a/browser/themes/osx/places/starred48.png b/browser/themes/osx/places/starred48.png
deleted file mode 100644
index bdcc7e757..000000000
--- a/browser/themes/osx/places/starred48.png
+++ /dev/null
diff --git a/browser/themes/osx/places/starred48@2x.png b/browser/themes/osx/places/starred48@2x.png
deleted file mode 100644
index 0ed76af19..000000000
--- a/browser/themes/osx/places/starred48@2x.png
+++ /dev/null
diff --git a/browser/themes/osx/places/tag.png b/browser/themes/osx/places/tag.png
deleted file mode 100644
index a4038bb4f..000000000
--- a/browser/themes/osx/places/tag.png
+++ /dev/null
diff --git a/browser/themes/osx/places/tag@2x.png b/browser/themes/osx/places/tag@2x.png
deleted file mode 100644
index 673814bb5..000000000
--- a/browser/themes/osx/places/tag@2x.png
+++ /dev/null
diff --git a/browser/themes/osx/places/toolbar-lion.png b/browser/themes/osx/places/toolbar-lion.png
deleted file mode 100644
index ac3358c91..000000000
--- a/browser/themes/osx/places/toolbar-lion.png
+++ /dev/null
diff --git a/browser/themes/osx/places/toolbar.png b/browser/themes/osx/places/toolbar.png
deleted file mode 100644
index 168daf9ce..000000000
--- a/browser/themes/osx/places/toolbar.png
+++ /dev/null
diff --git a/browser/themes/osx/places/toolbarDropMarker.png b/browser/themes/osx/places/toolbarDropMarker.png
deleted file mode 100644
index a217b0ed8..000000000
--- a/browser/themes/osx/places/toolbarDropMarker.png
+++ /dev/null
diff --git a/browser/themes/osx/places/unfiledBookmarks.png b/browser/themes/osx/places/unfiledBookmarks.png
deleted file mode 100644
index 69495dac0..000000000
--- a/browser/themes/osx/places/unfiledBookmarks.png
+++ /dev/null
diff --git a/browser/themes/osx/places/unfiledBookmarks@2x.png b/browser/themes/osx/places/unfiledBookmarks@2x.png
deleted file mode 100644
index 44efd6aba..000000000
--- a/browser/themes/osx/places/unfiledBookmarks@2x.png
+++ /dev/null
diff --git a/browser/themes/osx/places/unstarred48.png b/browser/themes/osx/places/unstarred48.png
deleted file mode 100644
index 8b82aab4b..000000000
--- a/browser/themes/osx/places/unstarred48.png
+++ /dev/null
diff --git a/browser/themes/osx/preferences/alwaysAsk.png b/browser/themes/osx/preferences/alwaysAsk.png
deleted file mode 100644
index c792d1488..000000000
--- a/browser/themes/osx/preferences/alwaysAsk.png
+++ /dev/null
diff --git a/browser/themes/osx/preferences/application.png b/browser/themes/osx/preferences/application.png
deleted file mode 100644
index b4c1ca7d0..000000000
--- a/browser/themes/osx/preferences/application.png
+++ /dev/null
diff --git a/browser/themes/osx/preferences/applications.css b/browser/themes/osx/preferences/applications.css
deleted file mode 100644
index 8a4a01500..000000000
--- a/browser/themes/osx/preferences/applications.css
+++ /dev/null
@@ -1,73 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-/**
- * Line up the actions menu with action labels above and below it.
- * Equalize the distance from the left side of the action box to the left side
- * of the icon for both the menu and the non-menu versions of the action box.
- * Also make sure the labels are the same distance away from the icons.
- */
-.actionsMenu {
-  margin-inline-start: -2px;
-  margin-top: 0;
-  margin-bottom: -1px;
-}
-
-#handlersView > richlistitem label {
-  margin-inline-start: 3px;
-  margin-top: 2px;
-}
-
-#handlersView > richlistitem {
-  min-height: 22px;
-}
-
-.typeIcon,
-.actionIcon {
-  margin-inline-start: 3px;
-}
-
-.typeIcon,
-.actionIcon,
-.actionsMenu .menulist-icon {
-  margin-inline-end: 2px;
-}
-
-.actionsMenu > menupopup > menuitem > .menu-iconic-left {
-  /* Undo content/browser/preferences/handlers.css - we don't
-   * want icon-less labels to line up with the other labels.
-   */
-  min-width: 0;
-}
-
-richlistitem[appHandlerIcon="ask"],
-menuitem[appHandlerIcon="ask"] {
-  list-style-image: url("chrome://browser/skin/preferences/alwaysAsk.png");
-}
-
-richlistitem[appHandlerIcon="save"],
-menuitem[appHandlerIcon="save"] {
-  list-style-image: url("chrome://browser/skin/preferences/saveFile.png");
-}
-
-richlistitem[appHandlerIcon="feed"],
-menuitem[appHandlerIcon="feed"] {
-  list-style-image: url("chrome://browser/skin/page-livemarks.png");
-}
-
-richlistitem[appHandlerIcon="plugin"],
-menuitem[appHandlerIcon="plugin"] {
-  list-style-image: url("chrome://mozapps/skin/plugins/pluginGeneric-16.png");
-}
-
-/* Repeat what menu.css does for .menuitem-iconic */
-menuitem[appHandlerIcon] {
-  padding-top: 1px;
-  padding-bottom: 3px;
-}
-
-menuitem[appHandlerIcon] > .menu-iconic-left > .menu-iconic-icon {
-  margin-inline-start: 0;
-  width: 16px;
-}
diff --git a/browser/themes/osx/preferences/in-content/dialog.css b/browser/themes/osx/preferences/in-content/dialog.css
deleted file mode 100644
index 46a6cb91c..000000000
--- a/browser/themes/osx/preferences/in-content/dialog.css
+++ /dev/null
@@ -1,36 +0,0 @@
-/* - This Source Code Form is subject to the terms of the Mozilla Public
-   - License, v. 2.0. If a copy of the MPL was not distributed with this file,
-   - You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-%include ../../../shared/incontentprefs/dialog.inc.css
-
-prefwindow,
-.windowDialog {
-  font: message-box !important;
-}
-
-label:not(.menu-text),
-textbox,
-description,
-.tab-text,
-caption > label {
-  font-size: 1.3em;
-}
-
-/* Create a separate rule to unset these styles on .tree-input instead of
-   using :not(.tree-input) so the selector specifity doesn't change. */
-textbox.tree-input {
-  font-size: unset;
-}
-
-button {
-  font-size: 1em;
-}
-
-caption {
-  font: message-box;
-}
-
-.prefWindow-dlgbuttons {
-  margin: 0;
-}
diff --git a/browser/themes/osx/preferences/in-content/preferences.css b/browser/themes/osx/preferences/in-content/preferences.css
deleted file mode 100644
index c59b08283..000000000
--- a/browser/themes/osx/preferences/in-content/preferences.css
+++ /dev/null
@@ -1,53 +0,0 @@
-/* - This Source Code Form is subject to the terms of the Mozilla Public
-   - License, v. 2.0. If a copy of the MPL was not distributed with this file,
-   - You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-%include ../../../shared/incontentprefs/preferences.inc.css
-
-prefpane .groupbox-title {
-  background: none;
-  margin-bottom: 0;
-}
-
-.actionsMenu > .menulist-label-box > .menulist-icon {
-  margin-top: 2px;
-  margin-inline-start: 2px;
-  margin-inline-end: 8px !important;
-}
-
-#downloadFolder > .fileFieldContentBox {
-  padding-inline-start: 3px;
-}
-
-#fxaProfileImage {
-  -moz-user-focus: normal;
-}
-
-textbox + button {
-  margin-inline-start: -4px;
-}
-
-filefield + button {
-  margin-inline-start: -8px;
-}
-
-#popupPolicyRow {
-  /* Override styles from
-     browser/themes/osx/preferences/preferences.css */
-  margin-bottom: 0 !important;
-  padding-bottom: 0 !important;
-  border-bottom: none;
-}
-
-#advancedPrefs {
-  margin-right: 0; /*override margin from normal preferences.css */
-  margin-left: 0;
-}
-
-/**
- * Dialog
- */
-
-#dialogTitle {
-  font-size: 1.1em;
-}
diff --git a/browser/themes/osx/preferences/preferences.css b/browser/themes/osx/preferences/preferences.css
deleted file mode 100644
index da0e66b6e..000000000
--- a/browser/themes/osx/preferences/preferences.css
+++ /dev/null
@@ -1,131 +0,0 @@
-/*
-# -*- Mode: Java; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
-# This Source Code Form is subject to the terms of the Mozilla Public
-# License, v. 2.0. If a copy of the MPL was not distributed with this
-# file, You can obtain one at http://mozilla.org/MPL/2.0/.
-*/
-
-%include ../../../../toolkit/themes/osx/global/shared.inc
-
-@namespace url("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul");
-@namespace html url("http://www.w3.org/1999/xhtml");
-
-.windowDialog {
-  padding: 12px;
-  font: -moz-dialog;
-}
-
-/* ----- APPLICATIONS PREFPANE ----- */
-description {
-  font: small-caption;
-  font-weight: normal;
-  line-height: 1.3em;
-  margin-bottom: 4px !important;
-}
-
-prefpane .groupbox-body {
-  -moz-appearance: none;
-  padding: 8px 4px 4px 4px;
-}
-
-prefpane .groupbox-title {
-  background: url("chrome://global/skin/50pct_transparent_grey.png") repeat-x bottom left;
-  margin-bottom: 4px;
-}
-
-tabpanels {
-  padding: 20px 7px 7px;
-}
-
-caption {
-  padding-inline-start: 5px;
-  padding-top: 4px;
-  padding-bottom: 2px;
-}
-
-#popupPolicyRow {
-  margin-bottom: 4px !important;
-  padding-bottom: 4px !important;
-  border-bottom: 1px solid #ccc;
-}
-
-#translationAttributionImage {
-  width: 70px;
-  cursor: pointer;
-}
-
-#browserUseCurrent,
-#browserUseBookmark,
-#browserUseBlank {
-  margin-top: 10px;
-}
-
-#advancedPrefs {
-  margin: 0 8px;
-}
-
-#privacyPrefs {
-  padding: 0 4px;
-}
-
-#privacyPrefs > tabpanels {
-  padding: 18px 10px 10px;
-}
-
-#OCSPDialogPane {
-  font: message-box !important;
-}
-
-/* General Pane */
-
-#useFirefoxSync,
-#getStarted {
-  font-size: 90%;
-}
-
-#isNotDefaultLabel {
-  font-weight: bold;
-}
-
-/**
- * Update Preferences
- */
-#autoInstallOptions {
-  margin-inline-start: 20px;
-}
-
-.updateControls {
-  margin-inline-start: 10px;
-}
-
-/**
- * Clear Private Data
- */
-#SanitizeDialogPane > groupbox {
-  margin-top: 0;
-}
-
-
-/* ----- SYNC PANE ----- */
-
-#syncDesc {
-  padding: 0 8em;
-}
-
-#accountCaptionImage {
-  list-style-image: url("chrome://mozapps/skin/profile/profileicon.png");
-}
-
-#syncAddDeviceLabel {
-  margin-top: 1em;
-  margin-bottom: 1em;
-}
-
-#noFxaAccount {
-  margin: 12px 4px;
-  line-height: 1.2em;
-}
-
-#noFxaAccount > label:first-child {
-  margin-bottom: 0.6em;
-}
diff --git a/browser/themes/osx/preferences/saveFile.png b/browser/themes/osx/preferences/saveFile.png
deleted file mode 100644
index 7177f8df3..000000000
--- a/browser/themes/osx/preferences/saveFile.png
+++ /dev/null
diff --git a/browser/themes/osx/privatebrowsing-mask-short.png b/browser/themes/osx/privatebrowsing-mask-short.png
deleted file mode 100644
index 92f60e29f..000000000
--- a/browser/themes/osx/privatebrowsing-mask-short.png
+++ /dev/null
diff --git a/browser/themes/osx/privatebrowsing-mask-short@2x.png b/browser/themes/osx/privatebrowsing-mask-short@2x.png
deleted file mode 100644
index ec1cf7452..000000000
--- a/browser/themes/osx/privatebrowsing-mask-short@2x.png
+++ /dev/null
diff --git a/browser/themes/osx/privatebrowsing-mask.png b/browser/themes/osx/privatebrowsing-mask.png
deleted file mode 100644
index 586d3d9f0..000000000
--- a/browser/themes/osx/privatebrowsing-mask.png
+++ /dev/null
diff --git a/browser/themes/osx/privatebrowsing-mask@2x.png b/browser/themes/osx/privatebrowsing-mask@2x.png
deleted file mode 100644
index efb6d9b80..000000000
--- a/browser/themes/osx/privatebrowsing-mask@2x.png
+++ /dev/null
diff --git a/browser/themes/osx/reload-stop-go-yosemite.png b/browser/themes/osx/reload-stop-go-yosemite.png
deleted file mode 100644
index 5efbf0b94..000000000
--- a/browser/themes/osx/reload-stop-go-yosemite.png
+++ /dev/null
diff --git a/browser/themes/osx/reload-stop-go-yosemite@2x.png b/browser/themes/osx/reload-stop-go-yosemite@2x.png
deleted file mode 100644
index b681f8930..000000000
--- a/browser/themes/osx/reload-stop-go-yosemite@2x.png
+++ /dev/null
diff --git a/browser/themes/osx/reload-stop-go.png b/browser/themes/osx/reload-stop-go.png
deleted file mode 100644
index 699ef2326..000000000
--- a/browser/themes/osx/reload-stop-go.png
+++ /dev/null
diff --git a/browser/themes/osx/reload-stop-go@2x.png b/browser/themes/osx/reload-stop-go@2x.png
deleted file mode 100644
index 704c7a894..000000000
--- a/browser/themes/osx/reload-stop-go@2x.png
+++ /dev/null
diff --git a/browser/themes/osx/sanitizeDialog.css b/browser/themes/osx/sanitizeDialog.css
deleted file mode 100644
index 14a6ce527..000000000
--- a/browser/themes/osx/sanitizeDialog.css
+++ /dev/null
@@ -1,91 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-/* Align the duration label with the warning box and item list */
-#sanitizeDurationLabel {
-  margin-inline-start: 1px;
-}
-
-
-/* Hide the duration dropdown suffix label if it's empty.  Otherwise it
-   takes up a little space, causing the end of the dropdown to not be aligned
-   with the warning box. */
-#sanitizeDurationSuffixLabel[value=""] {
-  display: none;
-}
-
-
-/* Places tree */
-#placesTreechildren::-moz-tree-row(selected),
-#placesTreechildren::-moz-tree-row(grippyRow) {
-  background: #999;
-}
-
-#placesTreechildren::-moz-tree-cell-text(selected) {
-  color: #111;
-}
-
-
-/* Sanitize everything warning box */
-#sanitizeEverythingWarningBox {
-  background-color: Window;
-  border: 1px solid ThreeDDarkShadow;
-  border-radius: 5px;
-  padding: 16px;
-}
-
-#sanitizeEverythingWarningIcon {
-  list-style-image: url("chrome://global/skin/icons/warning-large.png");
-  padding: 0;
-  margin: 0;
-}
-
-#sanitizeEverythingWarningDescBox {
-  padding: 0 16px;
-  margin: 0;
-}
-
-
-/* Progressive disclosure button */
-#detailsExpanderWrapper {
-  padding: 0;
-  margin-top: 6px;
-  margin-bottom: 6px;
-}
-
-.expander-up,
-.expander-down {
-  padding: 0;
-  margin: 0;
-}
-
-.expander-up {
-  -moz-appearance: -moz-mac-disclosure-button-open;
-}
-
-.expander-down {
-  -moz-appearance: -moz-mac-disclosure-button-closed;
-}
-
-/* Make the item list the same width as the warning box */
-#itemList {
-  margin-inline-start: 0;
-  margin-inline-end: 0;
-}
-
-/* Without this a useless scrollbar appears in the listbox when its rows
-   attribute is set to the total number of listitems, as it is currently.  See
-   bug 489958 comment 14 and bug 491788. */
-#itemList > listitem {
-  padding: 1px 0;
-}
-
-
-/* Align the last dialog button with the end of the warning box */
-.prefWindow-dlgbuttons {
-  margin-inline-end: 0;
-}
-.dialog-button[dlgtype="accept"] {
-  margin-inline-end: 0;
-}
diff --git a/browser/themes/osx/searchbar.css b/browser/themes/osx/searchbar.css
deleted file mode 100644
index 4b6aeeb21..000000000
--- a/browser/themes/osx/searchbar.css
+++ /dev/null
@@ -1,318 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-#PopupSearchAutoComplete {
-  /* JS code forces the panel to have the width of the searchbar rather than
-   * the width of the textfield. Alignment of the panel with the searchbar is
-   * obtained with negative margins here: margin-inline-start when the text
-   * field is in the same direction as the rest of the UI, margin-inline-end
-   * when the textfield's direction has been reversed.
-   * (eg. using command+shift+X) */
-  margin-inline-start: -23px;
-  margin-inline-end: -21px;
-}
-
-.searchbar-textbox {
-  border-radius: 10000px;
-}
-
-.searchbar-popup {
-  margin-top: 4px;
-  margin-inline-start: 3px;
-}
-
-.searchbar-textbox > .autocomplete-textbox-container > .textbox-input-box {
-  margin: 0;
-  padding: 3px 0 2px;
-  height: 20px;
-}
-
-.searchbar-engine-image {
-  width: 16px;
-  height: 16px;
-  list-style-image: url("chrome://mozapps/skin/places/defaultFavicon.png");
-}
-
-.search-go-container {
-  -moz-box-align: center;
-  padding-inline-end: 6px;
-}
-
-.searchbar-search-button-container {
-  -moz-box-align: center;
-}
-
-.search-go-button {
-  list-style-image: url("chrome://browser/skin/reload-stop-go.png");
-  -moz-image-region: rect(0, 42px, 14px, 28px);
-}
-
-.search-go-button:hover:active {
-  -moz-image-region: rect(14px, 42px, 28px, 28px);
-}
-
-.search-go-button:-moz-locale-dir(rtl) {
-  transform: scaleX(-1);
-}
-
-.searchbar-search-button {
-  list-style-image: url("chrome://browser/skin/search-indicator.png");
-  -moz-image-region: rect(0, 20px, 20px, 0);
-  margin-inline-start: 3px;
-  margin-inline-end: 1px;
-}
-
-.searchbar-search-button[addengines="true"] {
-  list-style-image: url("chrome://browser/skin/search-indicator-badge-add.png");
-}
-
-.searchbar-search-button:hover {
-  -moz-image-region: rect(0, 40px, 20px, 20px);
-}
-
-.searchbar-search-button:hover:active {
-  -moz-image-region: rect(0, 60px, 20px, 40px);
-}
-
-@media (min-resolution: 2dppx) {
-  .searchbar-engine-image {
-    list-style-image: url("chrome://mozapps/skin/places/defaultFavicon@2x.png");
-  }
-
-  .search-go-button {
-    list-style-image: url("chrome://browser/skin/reload-stop-go@2x.png");
-    -moz-image-region: rect(0, 84px, 28px, 56px);
-    width: 14px;
-  }
-
-  .search-go-button:hover:active {
-    list-style-image: url("chrome://browser/skin/reload-stop-go@2x.png");
-    -moz-image-region: rect(28px, 84px, 56px, 56px);
-    width: 14px;
-  }
-
-  .searchbar-search-button {
-    list-style-image: url("chrome://browser/skin/search-indicator@2x.png");
-    width: 20px;
-    -moz-image-region: rect(0, 40px, 40px, 0);
-  }
-
-  .searchbar-search-button[addengines="true"] {
-    list-style-image: url("chrome://browser/skin/search-indicator-badge-add@2x.png");
-  }
-
-  .searchbar-search-button:hover {
-    -moz-image-region: rect(0, 80px, 40px, 40px);
-  }
-
-  .searchbar-search-button:hover:active {
-    -moz-image-region: rect(0, 120px, 40px, 80px);
-  }
-}
-
-.search-panel-current-engine {
-  border-radius: 4px 4px 0 0;
-}
-
-/**
- * The borders of the various elements are specified as follows.
- *
- * The current engine always has a bottom border.
- * The search results never have a border.
- *
- * When the search results are not collapsed:
- * - The elements underneath the search results all have a top border.
- *
- * When the search results are collapsed:
- * - The elements underneath the search results all have a bottom border, except
- *   the lowest one: search-setting-button.
- */
-
-.search-panel-current-engine {
-  border-top: none !important;
-  border-bottom: 1px solid var(--panel-separator-color);
-}
-
-.search-panel-tree[collapsed=true] + .search-one-offs > .search-panel-header,
-.search-panel-tree[collapsed=true] + .search-one-offs > .search-panel-one-offs,
-.search-panel-tree[collapsed=true] + .search-one-offs > vbox > .addengine-item:first-of-type {
-  border-top: none;
-}
-
-.search-panel-tree[collapsed=true] + .search-one-offs > .searchbar-engine-one-off-item,
-.search-panel-tree[collapsed=true] + .search-one-offs > .search-panel-current-input,
-.search-panel-tree[collapsed=true] + .search-one-offs > .search-panel-one-offs,
-.search-panel-tree[collapsed=true] + .search-one-offs > vbox > .addengine-item:last-of-type {
-  border-bottom: 1px solid var(--panel-separator-color);
-}
-
-.search-panel-header {
-  font-size: 10px;
-  font-weight: normal;
-  background-color: var(--arrowpanel-dimmed);
-  border-top: 1px solid var(--panel-separator-color);
-  margin: 0;
-  padding: 3px 6px;
-  color: GrayText;
-}
-
-.search-panel-header > label {
-  margin-top: 2px !important;
-  margin-bottom: 2px !important;
-}
-
-.search-panel-current-input > label {
-  margin: 2px 0 !important;
-}
-
-.search-panel-input-value {
-  color: -moz-fieldtext;
-}
-
-.search-panel-one-offs {
-  margin: 0 !important;
-  border-top: 1px solid var(--panel-separator-color);
-}
-
-.searchbar-engine-one-off-item {
-  -moz-appearance: none;
-  display: inline-block;
-  min-width: 48px;
-  height: 32px;
-  margin: 0;
-  padding: 0;
-  background: linear-gradient(transparent 15%, var(--panel-separator-color) 15%, var(--panel-separator-color) 85%, transparent 85%);
-  background-size: 1px auto;
-  background-repeat: no-repeat;
-  background-position: right center;
-  color: GrayText;
-}
-
-.searchbar-engine-one-off-item:-moz-locale-dir(rtl) {
-  background-position: left center;
-}
-
-.searchbar-engine-one-off-item:not(.last-row) {
-  box-sizing: content-box;
-  border-bottom: 1px solid var(--panel-separator-color);
-}
-
-.search-setting-button-compact {
-  border-bottom: none !important;
-}
-
-.search-panel-one-offs:not([compact=true]) > .searchbar-engine-one-off-item.last-of-row,
-.search-panel-one-offs[compact=true] > .searchbar-engine-one-off-item.last-of-row:not(.dummy),
-.search-panel-one-offs[compact=true] > .searchbar-engine-one-off-item.dummy:not(.last-of-row),
-.search-panel-one-offs[compact=true] > .searchbar-engine-one-off-item.last-engine,
-.search-setting-button-compact {
-  background-image: none;
-}
-
-.searchbar-engine-one-off-item[selected] {
-  background-color: Highlight;
-  background-image: none;
-  color: HighlightText;
-}
-
-.searchbar-engine-one-off-item > .button-box > .button-text {
-  display: none;
-}
-
-.searchbar-engine-one-off-item > .button-box > .button-icon {
-  margin-inline-start: 0;
-  width: 16px;
-  height: 16px;
-}
-
-.addengine-item {
-  -moz-appearance: none;
-  font-size: 10px;
-  height: 32px;
-  margin: 0;
-  padding: 0 10px;
-}
-
-.addengine-item > .button-box {
-  -moz-box-pack: start;
-}
-
-.addengine-item:first-of-type {
-  border-top: 1px solid var(--panel-separator-color);
-}
-
-.addengine-item[selected] {
-  background-color: Highlight;
-  color: HighlightText;
-}
-
-.addengine-icon {
-  width: 16px;
-}
-
-.addengine-badge {
-  width: 16px;
-  height: 16px;
-  margin: -7px -9px 7px 9px;
-  list-style-image: url("chrome://browser/skin/badge-add-engine.png");
-}
-
-.addengine-item > .button-box > .button-text {
-  -moz-box-flex: 1;
-  text-align: start;
-  padding-inline-start: 10px;
-}
-
-.addengine-item:not([image]) {
-  list-style-image: url("chrome://browser/skin/search-engine-placeholder.png");
-}
-
-@media (min-resolution: 2dppx) {
-  .addengine-badge {
-    list-style-image: url("chrome://browser/skin/badge-add-engine@2x.png");
-  }
-
-  .addengine-item:not([image]) {
-    list-style-image: url("chrome://browser/skin/search-engine-placeholder@2x.png");
-  }
-}
-
-.search-panel-tree > .autocomplete-treebody::-moz-tree-cell {
-  border-top: none !important;
-}
-
-.search-panel-tree > .autocomplete-treebody::-moz-tree-image {
-  padding-inline-start: 4px;
-  padding-inline-end: 2px;
-  width: 14px;
-  height: 14px;
-}
-
-.search-panel-tree > .autocomplete-treebody::-moz-tree-image(fromhistory) {
-  list-style-image: url("chrome://browser/skin/search-history-icon.svg#search-history-icon");
-}
-
-.search-panel-tree > .autocomplete-treebody::-moz-tree-image(fromhistory, selected) {
-  list-style-image: url("chrome://browser/skin/search-history-icon.svg#search-history-icon-active");
-}
-
-#PopupSearchAutoComplete {
-  border-radius: 4px;
-}
-
-.search-setting-button {
-  -moz-appearance: none;
-  border-radius: 0 0 4px 4px;
-  min-height: 32px;
-}
-
-.search-setting-button[selected] {
-  background-color: var(--arrowpanel-dimmed-further);
-}
-
-.search-setting-button-compact > .button-box > .button-icon {
-  list-style-image: url("chrome://browser/skin/gear.svg");
-  filter: url(chrome://browser/skin/filters.svg#fill);
-  fill: currentColor;
-}
diff --git a/browser/themes/osx/setDesktopBackground.css b/browser/themes/osx/setDesktopBackground.css
deleted file mode 100644
index f9b16ec2b..000000000
--- a/browser/themes/osx/setDesktopBackground.css
+++ /dev/null
@@ -1,18 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-@namespace url("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul");
-@namespace html url("http://www.w3.org/1999/xhtml");
-
-html|canvas#screen {
-  margin: 12px 11px 38px;
-}
-
-#monitor {
-  list-style-image: url("chrome://browser/skin/monitor.png");
-}
-
-#monitor[aspectratio="16:10"] {
-  list-style-image: url("chrome://browser/skin/monitor_16-10.png");
-}
diff --git a/browser/themes/osx/shared.inc b/browser/themes/osx/shared.inc
deleted file mode 100644
index b3ea4e199..000000000
--- a/browser/themes/osx/shared.inc
+++ /dev/null
@@ -1,13 +0,0 @@
-%include ../../../toolkit/themes/osx/global/shared.inc

-%include ../shared/browser.inc

-

-%filter substitution

-

-%define fgTabTexture linear-gradient(transparent 2px, hsl(0,0%,99%) 2px, hsl(0,0%,93%))

-%define fgTabTextureYosemiteInactive linear-gradient(transparent 2px, hsl(0,0%,99%) 2px, hsl(0,0%,97%))

-%define toolbarColorLWT rgba(253,253,253,0.45)

-%define fgTabTextureLWT linear-gradient(transparent 2px, rgba(254,254,254,.72) 2px, @toolbarColorLWT@)

-%define fgTabBackgroundColor transparent

-%define hudButton -moz-appearance: none; color: #434343; border-radius: 4px; border: 1px solid #b5b5b5; background: linear-gradient(#fff, #f2f2f2); box-shadow: inset 0 1px rgba(255,255,255,.8), inset 0 0 1px rgba(255,255, 255,.25), 0 1px rgba(255,255,255,.3); background-clip: padding-box; background-origin: padding-box; padding: 2px 6px;

-%define hudButtonPressed box-shadow: inset 0 1px 4px -3px #000, 0 1px rgba(255,255,255,.3);

-%define hudButtonFocused box-shadow: 0 0 1px -moz-mac-focusring inset, 0 0 4px 1px -moz-mac-focusring, 0 0 2px 1px -moz-mac-focusring;

diff --git a/browser/themes/osx/slowStartup-16.png b/browser/themes/osx/slowStartup-16.png
deleted file mode 100644
index 439bec340..000000000
--- a/browser/themes/osx/slowStartup-16.png
+++ /dev/null
diff --git a/browser/themes/osx/subtle-pattern.png b/browser/themes/osx/subtle-pattern.png
deleted file mode 100644
index 701239ec0..000000000
--- a/browser/themes/osx/subtle-pattern.png
+++ /dev/null
diff --git a/browser/themes/osx/sync-128.png b/browser/themes/osx/sync-128.png
deleted file mode 100644
index 1ea34818c..000000000
--- a/browser/themes/osx/sync-128.png
+++ /dev/null
diff --git a/browser/themes/osx/sync-16.png b/browser/themes/osx/sync-16.png
deleted file mode 100644
index 0afb1c719..000000000
--- a/browser/themes/osx/sync-16.png
+++ /dev/null
diff --git a/browser/themes/osx/sync-32.png b/browser/themes/osx/sync-32.png
deleted file mode 100644
index 7a762cb98..000000000
--- a/browser/themes/osx/sync-32.png
+++ /dev/null
diff --git a/browser/themes/osx/sync-bg.png b/browser/themes/osx/sync-bg.png
deleted file mode 100644
index 893a27d76..000000000
--- a/browser/themes/osx/sync-bg.png
+++ /dev/null
diff --git a/browser/themes/osx/sync-horizontalbar-yosemite.png b/browser/themes/osx/sync-horizontalbar-yosemite.png
deleted file mode 100644
index 43e911462..000000000
--- a/browser/themes/osx/sync-horizontalbar-yosemite.png
+++ /dev/null
diff --git a/browser/themes/osx/sync-horizontalbar-yosemite@2x.png b/browser/themes/osx/sync-horizontalbar-yosemite@2x.png
deleted file mode 100644
index c9472b70e..000000000
--- a/browser/themes/osx/sync-horizontalbar-yosemite@2x.png
+++ /dev/null
diff --git a/browser/themes/osx/sync-horizontalbar.png b/browser/themes/osx/sync-horizontalbar.png
deleted file mode 100644
index 4223d3bcb..000000000
--- a/browser/themes/osx/sync-horizontalbar.png
+++ /dev/null
diff --git a/browser/themes/osx/sync-horizontalbar@2x.png b/browser/themes/osx/sync-horizontalbar@2x.png
deleted file mode 100644
index fdc126681..000000000
--- a/browser/themes/osx/sync-horizontalbar@2x.png
+++ /dev/null
diff --git a/browser/themes/osx/sync-notification-24.png b/browser/themes/osx/sync-notification-24.png
deleted file mode 100644
index 8d2ec8fa8..000000000
--- a/browser/themes/osx/sync-notification-24.png
+++ /dev/null
diff --git a/browser/themes/osx/syncCommon.css b/browser/themes/osx/syncCommon.css
deleted file mode 100644
index 2d39aa179..000000000
--- a/browser/themes/osx/syncCommon.css
+++ /dev/null
@@ -1,55 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-/* The following are used by both sync/setup.xul and sync/genericChange.xul */
-.status {
-  color: -moz-dialogtext;
-}
-
-.statusIcon {
-  margin-inline-start: 4px;
-  max-height: 16px;
-  max-width: 16px;
-}
-
-.statusIcon[status="active"] {
-  list-style-image: url("chrome://global/skin/icons/loading.png");
-}
-
-@media (min-resolution: 2dppx) {
-  .statusIcon[status="active"] {
-    list-style-image: url("chrome://global/skin/icons/loading@2x.png");
-  }
-}
-
-.statusIcon[status="error"] {
-  list-style-image: url("chrome://global/skin/icons/error-16.png");
-}
-
-.statusIcon[status="success"] {
-  list-style-image: url("chrome://global/skin/icons/information-16.png");
-}
-
-/* .data is only used by sync/genericChange.xul, but it seems unnecessary to have
-   a separate stylesheet for it. */
-.data {
-  font-size: 90%;
-  font-weight: bold;
-}
-
-dialog#change-dialog {
-  width: 40em;
-}
-
-image#syncIcon {
-  list-style-image: url("chrome://browser/skin/sync-32.png");
-}
-
-#introText {
-  margin-top: 2px;
-}
-
-#feedback {
-  height: 2em;
-}
diff --git a/browser/themes/osx/syncProgress-horizontalbar.png b/browser/themes/osx/syncProgress-horizontalbar.png
deleted file mode 100644
index 48cd11055..000000000
--- a/browser/themes/osx/syncProgress-horizontalbar.png
+++ /dev/null
diff --git a/browser/themes/osx/syncProgress-horizontalbar@2x.png b/browser/themes/osx/syncProgress-horizontalbar@2x.png
deleted file mode 100644
index 741dd2ed4..000000000
--- a/browser/themes/osx/syncProgress-horizontalbar@2x.png
+++ /dev/null
diff --git a/browser/themes/osx/syncProgress-menuPanel.png b/browser/themes/osx/syncProgress-menuPanel.png
deleted file mode 100644
index 6fd6f9c16..000000000
--- a/browser/themes/osx/syncProgress-menuPanel.png
+++ /dev/null
diff --git a/browser/themes/osx/syncProgress-menuPanel@2x.png b/browser/themes/osx/syncProgress-menuPanel@2x.png
deleted file mode 100644
index 04b2cae00..000000000
--- a/browser/themes/osx/syncProgress-menuPanel@2x.png
+++ /dev/null
diff --git a/browser/themes/osx/syncProgress-toolbar-inverted.png b/browser/themes/osx/syncProgress-toolbar-inverted.png
deleted file mode 100644
index 42f3da363..000000000
--- a/browser/themes/osx/syncProgress-toolbar-inverted.png
+++ /dev/null
diff --git a/browser/themes/osx/syncProgress-toolbar-inverted@2x.png b/browser/themes/osx/syncProgress-toolbar-inverted@2x.png
deleted file mode 100644
index eee4a5dd0..000000000
--- a/browser/themes/osx/syncProgress-toolbar-inverted@2x.png
+++ /dev/null
diff --git a/browser/themes/osx/syncProgress-toolbar.png b/browser/themes/osx/syncProgress-toolbar.png
deleted file mode 100644
index 49e224f0d..000000000
--- a/browser/themes/osx/syncProgress-toolbar.png
+++ /dev/null
diff --git a/browser/themes/osx/syncProgress-toolbar@2x.png b/browser/themes/osx/syncProgress-toolbar@2x.png
deleted file mode 100644
index fd2038725..000000000
--- a/browser/themes/osx/syncProgress-toolbar@2x.png
+++ /dev/null
diff --git a/browser/themes/osx/syncQuota.css b/browser/themes/osx/syncQuota.css
deleted file mode 100644
index 1577de8a3..000000000
--- a/browser/themes/osx/syncQuota.css
+++ /dev/null
@@ -1,26 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-#quotaDialog {
-  width: 33em;
-  height: 25em;
-}
-
-treechildren::-moz-tree-checkbox {
-  list-style-image: none;
-}
-treechildren::-moz-tree-checkbox(checked) {
-  list-style-image: url("chrome://global/skin/checkbox/cbox-check.gif");
-}
-treechildren::-moz-tree-checkbox(disabled) {
-  list-style-image: url("chrome://global/skin/checkbox/cbox-check-dis.gif");
-}
-
-#treeCaption {
-  height: 4em;
-}
-
-.captionWarning {
-  font-weight: bold;
-}
diff --git a/browser/themes/osx/syncSetup.css b/browser/themes/osx/syncSetup.css
deleted file mode 100644
index 0861df831..000000000
--- a/browser/themes/osx/syncSetup.css
+++ /dev/null
@@ -1,139 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-wizard {
-  -moz-appearance: none;
-  width: 55em;
-  height: 45em;
-  padding: 0;
-  background-color: Window;
-}
-
-.wizard-page-box {
-  -moz-appearance: none;
-  padding-left: 0;
-  padding-right: 0;
-  margin: 0;
-}
-
-wizardpage {
-  -moz-box-pack: center;
-  -moz-box-align: center;
-  margin: 0;
-  padding: 0 6em;
-  background-color: Window;
-}
-
-.wizard-header {
-  -moz-appearance: none;
-  border: none;
-  padding: 2em 0 1em 0;
-  text-align: center;
-}
-.wizard-header-label {
-  font-size: 24pt;
-  font-weight: normal;
-}
-
-.wizard-buttons {
-  background-color: rgba(0,0,0,0.1);
-  padding: 1em;
-}
-
-.wizard-buttons-separator {
-  visibility: collapse;
-}
-
-.wizard-header-icon {
-  visibility: collapse;
-}
-
-.accountChoiceButton {
-  font: menu;
-}
-
-.confirm {
-  border: 1px solid black;
-  padding: 1em;
-  border-radius: 5px;
-}
-
-/* Override the text-link style from global.css */
-description > .text-link,
-description > .text-link:focus {
-  margin: 0px;
-  padding: 0px;
-  border: 0px;
-}
-
-.success,
-.error {
-  padding: 2px;
-  border-radius: 2px;
-}
-
-.error {
-  background-color: #FF0000 !important;
-  color: #FFFFFF !important;
-}
-
-.success {
-  background-color: #00FF00 !important;
-}
-
-.warning {
-  font-weight: bold;
-  font-size: 100%;
-  color: red;
-}
-
-.mainDesc {
-  font-weight: bold;
-  font-size: 100%;
-}
-
-.normal {
-  font-size: 100%;
-}
-
-.inputColumn {
-  margin-inline-end: 2px
-}
-
-.pin {
-  font-size: 18pt;
-  width: 4em;
-  text-align: center; 
-}
-
-#passphraseHelpSpacer {
-  width: 0.5em;
-}
-
-#pairDeviceThrobber,
-#login-throbber {
-  -moz-box-align: center;
-}
-
-#pairDeviceThrobber > image,
-#login-throbber > image {
-  width: 16px;
-  list-style-image: url("chrome://global/skin/icons/loading.png");
-}
-
-@media (min-resolution: 2dppx) {
-  #pairDeviceThrobber > image,
-  #login-throbber > image {
-    list-style-image: url("chrome://global/skin/icons/loading@2x.png");
-  }
-}
-
-#captchaFeedback {
-  visibility: hidden;
-}
-
-#successPageIcon {
-  /* TODO replace this with a 128px version (bug 591122) */
-  list-style-image: url("chrome://browser/skin/sync-32.png");
-}
diff --git a/browser/themes/osx/syncedtabs/sidebar.css b/browser/themes/osx/syncedtabs/sidebar.css
deleted file mode 100644
index 4d1de766c..000000000
--- a/browser/themes/osx/syncedtabs/sidebar.css
+++ /dev/null
@@ -1,154 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-%include ../../shared/syncedtabs/sidebar.inc.css
-
-/* These styles are intended to mimic XUL trees and the XUL search box. */
-
-.content-container {
-  -moz-appearance: -moz-mac-source-list;
-}
-
-.item {
-  color: -moz-DialogText;
-}
-
-.item-title-container {
-  box-sizing: border-box;
-  align-items: center;
-  height: 24px;
-  font-size: 12px;
-}
-
-.item.selected > .item-title-container {
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diff --git a/browser/themes/osx/tabbrowser/alltabs-box-bkgnd-icon-inverted.png b/browser/themes/osx/tabbrowser/alltabs-box-bkgnd-icon-inverted.png
deleted file mode 100644
index 295b4ad74..000000000
--- a/browser/themes/osx/tabbrowser/alltabs-box-bkgnd-icon-inverted.png
+++ /dev/null
diff --git a/browser/themes/osx/tabbrowser/alltabs-box-bkgnd-icon-inverted@2x.png b/browser/themes/osx/tabbrowser/alltabs-box-bkgnd-icon-inverted@2x.png
deleted file mode 100644
index 23889d7cc..000000000
--- a/browser/themes/osx/tabbrowser/alltabs-box-bkgnd-icon-inverted@2x.png
+++ /dev/null
diff --git a/browser/themes/osx/tabbrowser/alltabs-box-bkgnd-icon-lion.png b/browser/themes/osx/tabbrowser/alltabs-box-bkgnd-icon-lion.png
deleted file mode 100644
index 4d71308d2..000000000
--- a/browser/themes/osx/tabbrowser/alltabs-box-bkgnd-icon-lion.png
+++ /dev/null
diff --git a/browser/themes/osx/tabbrowser/alltabs-box-bkgnd-icon-lion@2x.png b/browser/themes/osx/tabbrowser/alltabs-box-bkgnd-icon-lion@2x.png
deleted file mode 100644
index 875f73c5e..000000000
--- a/browser/themes/osx/tabbrowser/alltabs-box-bkgnd-icon-lion@2x.png
+++ /dev/null
diff --git a/browser/themes/osx/tabbrowser/alltabs-box-bkgnd-icon.png b/browser/themes/osx/tabbrowser/alltabs-box-bkgnd-icon.png
deleted file mode 100644
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--- a/browser/themes/osx/tabbrowser/alltabs-box-bkgnd-icon.png
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deleted file mode 100644
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--- a/browser/themes/osx/tabbrowser/newtab-inverted.png
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deleted file mode 100644
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diff --git a/browser/themes/osx/tabbrowser/newtab.png b/browser/themes/osx/tabbrowser/newtab.png
deleted file mode 100644
index 32e42b04c..000000000
--- a/browser/themes/osx/tabbrowser/newtab.png
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diff --git a/browser/themes/osx/tabbrowser/newtab@2x.png b/browser/themes/osx/tabbrowser/newtab@2x.png
deleted file mode 100644
index ffde5f050..000000000
--- a/browser/themes/osx/tabbrowser/newtab@2x.png
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deleted file mode 100644
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--- a/browser/themes/osx/tabbrowser/tab-active-middle-yosemite-inactive.png
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deleted file mode 100644
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--- a/browser/themes/osx/tabbrowser/tab-active-middle.png
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deleted file mode 100644
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--- a/browser/themes/osx/tabbrowser/tab-active-middle@2x.png
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deleted file mode 100644
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--- a/browser/themes/osx/tabbrowser/tab-arrow-left-inverted.png
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deleted file mode 100644
index 4ca8ec0ba..000000000
--- a/browser/themes/osx/tabbrowser/tab-arrow-left-inverted@2x.png
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deleted file mode 100644
index 61ad41ae9..000000000
--- a/browser/themes/osx/tabbrowser/tab-arrow-left.png
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deleted file mode 100644
index 20bf78db2..000000000
--- a/browser/themes/osx/tabbrowser/tab-arrow-left@2x.png
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deleted file mode 100644
index 0cd8f37a6..000000000
--- a/browser/themes/osx/tabbrowser/tab-arrow-right-inverted.png
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diff --git a/browser/themes/osx/tabbrowser/tab-arrow-right-inverted@2x.png b/browser/themes/osx/tabbrowser/tab-arrow-right-inverted@2x.png
deleted file mode 100644
index e4ab8cbaa..000000000
--- a/browser/themes/osx/tabbrowser/tab-arrow-right-inverted@2x.png
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diff --git a/browser/themes/osx/tabbrowser/tab-arrow-right.png b/browser/themes/osx/tabbrowser/tab-arrow-right.png
deleted file mode 100644
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--- a/browser/themes/osx/tabbrowser/tab-arrow-right.png
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deleted file mode 100644
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--- a/browser/themes/osx/tabbrowser/tab-arrow-right@2x.png
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deleted file mode 100644
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--- a/browser/themes/osx/tabbrowser/tab-background-end.png
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deleted file mode 100644
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--- a/browser/themes/osx/tabbrowser/tab-background-end@2x.png
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deleted file mode 100644
index addb64b13..000000000
--- a/browser/themes/osx/tabbrowser/tab-background-middle.png
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diff --git a/browser/themes/osx/tabbrowser/tab-background-middle@2x.png b/browser/themes/osx/tabbrowser/tab-background-middle@2x.png
deleted file mode 100644
index 41eba94af..000000000
--- a/browser/themes/osx/tabbrowser/tab-background-middle@2x.png
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diff --git a/browser/themes/osx/tabbrowser/tab-background-start.png b/browser/themes/osx/tabbrowser/tab-background-start.png
deleted file mode 100644
index 243bf0099..000000000
--- a/browser/themes/osx/tabbrowser/tab-background-start.png
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diff --git a/browser/themes/osx/tabbrowser/tab-background-start@2x.png b/browser/themes/osx/tabbrowser/tab-background-start@2x.png
deleted file mode 100644
index 86403921d..000000000
--- a/browser/themes/osx/tabbrowser/tab-background-start@2x.png
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diff --git a/browser/themes/osx/tabbrowser/tab-selected-end-yosemite-inactive.svg b/browser/themes/osx/tabbrowser/tab-selected-end-yosemite-inactive.svg
deleted file mode 100644
index decefab6e..000000000
--- a/browser/themes/osx/tabbrowser/tab-selected-end-yosemite-inactive.svg
+++ /dev/null
@@ -1,24 +0,0 @@
-<!-- This Source Code Form is subject to the terms of the Mozilla Public
-   - License, v. 2.0. If a copy of the MPL was not distributed with this
-   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
-<svg xmlns="http://www.w3.org/2000/svg" width="30px" height="31px" preserveAspectRatio="none">
-  <defs>
-    <style>
-      #tab-background-fill {
-        background-color: transparent;
-        background-image: linear-gradient(transparent, transparent 2px, hsl(0,0%,99%) 2px, hsl(0,0%,97%));
-        background-repeat: no-repeat;
-        height: 100%;
-        width: 100%;
-      }
-    </style>
-
-    <clipPath id="tab-curve-clip-path-end" clipPathUnits="objectBoundingBox">
-      <path d="m 0,0.0625 -0.05,0 0,0.938 1,0 0,-0.028 C 0.67917542,0.95840561 0.56569036,0.81970962 0.51599998,0.5625 0.48279998,0.3905 0.465,0.0659 0,0.0625 z"/>
-    </clipPath>
-  </defs>
-
-  <foreignObject width="30" height="31" clip-path="url(#tab-curve-clip-path-end)">
-    <div id="tab-background-fill" xmlns="http://www.w3.org/1999/xhtml"></div>
-  </foreignObject>
-</svg>
diff --git a/browser/themes/osx/tabbrowser/tab-selected-start-yosemite-inactive.svg b/browser/themes/osx/tabbrowser/tab-selected-start-yosemite-inactive.svg
deleted file mode 100644
index e29bab297..000000000
--- a/browser/themes/osx/tabbrowser/tab-selected-start-yosemite-inactive.svg
+++ /dev/null
@@ -1,24 +0,0 @@
-<!-- This Source Code Form is subject to the terms of the Mozilla Public
-   - License, v. 2.0. If a copy of the MPL was not distributed with this
-   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
-<svg xmlns="http://www.w3.org/2000/svg" width="30px" height="31px" preserveAspectRatio="none">
-  <defs>
-    <style>
-      #tab-background-fill {
-        background-color: transparent;
-        background-image: linear-gradient(transparent, transparent 2px, hsl(0,0%,99%) 2px, hsl(0,0%,97%));
-        background-repeat: no-repeat;
-        height: 100%;
-        width: 100%;
-      }
-    </style>
-
-    <clipPath id="tab-curve-clip-path-start" clipPathUnits="objectBoundingBox">
-      <path d="m 1,0.0625 0.05,0 0,0.938 -1,0 0,-0.028 C 0.32082458,0.95840561 0.4353096,0.81970962 0.48499998,0.5625 0.51819998,0.3905 0.535,0.0659 1,0.0625 z"/>
-    </clipPath>
-  </defs>
-
-  <foreignObject width="30" height="31" clip-path="url(#tab-curve-clip-path-start)">
-    <div id="tab-background-fill" xmlns="http://www.w3.org/1999/xhtml"></div>
-  </foreignObject>
-</svg>
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deleted file mode 100644
index 4206f0c7d..000000000
--- a/browser/themes/osx/tabbrowser/tab-stroke-end-yosemite-inactive.png
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deleted file mode 100644
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--- a/browser/themes/osx/tabbrowser/tab-stroke-end-yosemite-inactive@2x.png
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deleted file mode 100755
index 099978580..000000000
--- a/browser/themes/osx/tabbrowser/tab-stroke-end.png
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--- a/browser/themes/osx/tabbrowser/tab-stroke-end@2x.png
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deleted file mode 100644
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--- a/browser/themes/osx/tabbrowser/tab-stroke-start@2x.png
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diff --git a/browser/themes/osx/tabbrowser/tabDragIndicator.png b/browser/themes/osx/tabbrowser/tabDragIndicator.png
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index a373cae53..000000000
--- a/browser/themes/osx/tabbrowser/tabDragIndicator.png
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--- a/browser/themes/osx/tabbrowser/tabDragIndicator@2x.png
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diff --git a/browser/themes/osx/toolbarbutton-dropmarker-lion.png b/browser/themes/osx/toolbarbutton-dropmarker-lion.png
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--- a/browser/themes/osx/toolbarbutton-dropmarker-lion.png
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diff --git a/browser/themes/osx/toolbarbutton-dropmarker.png b/browser/themes/osx/toolbarbutton-dropmarker.png
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diff --git a/browser/themes/osx/urlbar-history-dropmarker@2x.png b/browser/themes/osx/urlbar-history-dropmarker@2x.png
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diff --git a/browser/themes/osx/urlbar-popup-blocked.png b/browser/themes/osx/urlbar-popup-blocked.png
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--- a/browser/themes/osx/urlbar-popup-blocked.png
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diff --git a/browser/themes/osx/urlbar-popup-blocked@2x.png b/browser/themes/osx/urlbar-popup-blocked@2x.png
deleted file mode 100644
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diff --git a/browser/themes/osx/webRTC-indicator.css b/browser/themes/osx/webRTC-indicator.css
deleted file mode 100644
index 759dbd813..000000000
--- a/browser/themes/osx/webRTC-indicator.css
+++ /dev/null
@@ -1,35 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-#webRTC-sharingCamera-menu {
-  list-style-image: url("chrome://browser/skin/webRTC-sharingDevice-menubar.png");
-}
-
-#webRTC-sharingMicrophone-menu {
-  list-style-image: url("chrome://browser/skin/webRTC-sharingMicrophone-menubar.png");
-}
-
-#webRTC-sharingScreen-menu {
-  list-style-image: url("chrome://browser/skin/webRTC-sharingScreen-menubar.png");
-}
-
-@media (min-resolution: 2dppx) {
-  #webRTC-sharingCamera-menu {
-    list-style-image: url("chrome://browser/skin/webRTC-sharingDevice-menubar@2x.png");
-  }
-
-  #webRTC-sharingMicrophone-menu {
-    list-style-image: url("chrome://browser/skin/webRTC-sharingMicrophone-menubar@2x.png");
-  }
-
-  #webRTC-sharingScreen-menu {
-    list-style-image: url("chrome://browser/skin/webRTC-sharingScreen-menubar@2x.png");
-  }
-}
-
-#webRTC-sharingCamera-menu > menupopup,
-#webRTC-sharingMicrophone-menu > menupopup,
-#webRTC-sharingScreen-menu > menupopup {
-  list-style-image: none; /* don't inherit into menu items */
-}
diff --git a/browser/themes/osx/webRTC-sharingDevice-menubar.png b/browser/themes/osx/webRTC-sharingDevice-menubar.png
deleted file mode 100644
index fb74738dd..000000000
--- a/browser/themes/osx/webRTC-sharingDevice-menubar.png
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diff --git a/browser/themes/osx/webRTC-sharingDevice-menubar@2x.png b/browser/themes/osx/webRTC-sharingDevice-menubar@2x.png
deleted file mode 100644
index 8f64887a8..000000000
--- a/browser/themes/osx/webRTC-sharingDevice-menubar@2x.png
+++ /dev/null
diff --git a/browser/themes/osx/webRTC-sharingMicrophone-menubar.png b/browser/themes/osx/webRTC-sharingMicrophone-menubar.png
deleted file mode 100644
index c47f5827d..000000000
--- a/browser/themes/osx/webRTC-sharingMicrophone-menubar.png
+++ /dev/null
diff --git a/browser/themes/osx/webRTC-sharingMicrophone-menubar@2x.png b/browser/themes/osx/webRTC-sharingMicrophone-menubar@2x.png
deleted file mode 100644
index 2c45c8bcc..000000000
--- a/browser/themes/osx/webRTC-sharingMicrophone-menubar@2x.png
+++ /dev/null
diff --git a/browser/themes/osx/webRTC-sharingScreen-menubar.png b/browser/themes/osx/webRTC-sharingScreen-menubar.png
deleted file mode 100644
index 6d9e49cfd..000000000
--- a/browser/themes/osx/webRTC-sharingScreen-menubar.png
+++ /dev/null
diff --git a/browser/themes/osx/webRTC-sharingScreen-menubar@2x.png b/browser/themes/osx/webRTC-sharingScreen-menubar@2x.png
deleted file mode 100644
index 0f3d62ec5..000000000
--- a/browser/themes/osx/webRTC-sharingScreen-menubar@2x.png
+++ /dev/null
diff --git a/browser/themes/preprocess-tab-svgs.py b/browser/themes/preprocess-tab-svgs.py
deleted file mode 100755
index ab3e6ca88..000000000
--- a/browser/themes/preprocess-tab-svgs.py
+++ /dev/null
@@ -1,31 +0,0 @@
-#!/usr/bin/env python
-
-# This Source Code Form is subject to the terms of the Mozilla Public
-# License, v. 2.0. If a copy of the MPL was not distributed with this
-# file, You can obtain one at http://mozilla.org/MPL/2.0/.
-
-import buildconfig
-
-from mozbuild.preprocessor import preprocess
-
-# By default, the pre-processor used for jar.mn will use "%" as a marker
-# for ".css" files and "#" otherwise. This falls apart when a file using
-# one marker needs to include a file with the other marker since the
-# pre-processor instructions in the included file will not be
-# processed. The following SVG files need to include a file which uses
-# "%" as the marker so we invoke the pre- processor ourselves here with
-# the marker specified. The resulting SVG files will get packaged by the
-# processing of the jar file in the appropriate directory.
-def _do_preprocessing(output_svg, input_svg_file, additional_defines):
-    additional_defines.update(buildconfig.defines)
-    return preprocess(output=output_svg,
-                      includes=[input_svg_file],
-                      marker='%',
-                      defines=additional_defines)
-
-def tab_side_start(output_svg, input_svg_file):
-    return _do_preprocessing(output_svg, input_svg_file, {'TAB_SIDE': 'start'})
-
-def tab_side_end(output_svg, input_svg_file):
-    return _do_preprocessing(output_svg, input_svg_file, {'TAB_SIDE': 'end'})
-
diff --git a/browser/themes/shared/aboutNetError.css b/browser/themes/shared/aboutNetError.css
deleted file mode 100644
index c0b76aa47..000000000
--- a/browser/themes/shared/aboutNetError.css
+++ /dev/null
@@ -1,169 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-@import url("chrome://browser/skin/error-pages.css");
-
-body {
-  background-image: linear-gradient(-45deg, #eeeeee,     #eeeeee 33%,
-                                            #fbfbfb 33%, #fbfbfb 66%,
-                                            #eeeeee 66%, #eeeeee);
-}
-
-body.certerror {
-  background-image: linear-gradient(-45deg, #f0d000,     #f0d000 33%,
-                                            #fedc00 33%, #fedc00 66%,
-                                            #f0d000 66%, #f0d000);
-}
-
-body.captiveportal .title {
-  background-image: url("wifi.svg");
-}
-
-body.certerror .title {
-  background-image: url("cert-error.svg");
-}
-
-#errorContainer {
-  display: none;
-}
-
-/* Pressing the retry button will cause the cursor to flicker from a pointer to
- * not-allowed. Override the disabled cursor behaviour since we will never show
- * the button disabled as the initial state. */
-button:disabled {
-  cursor: pointer;
-}
-
-#prefChangeContainer {
-  display: none;
-}
-
-#learnMoreContainer {
-  display: none;
-}
-
-#certErrorAndCaptivePortalButtonContainer {
-  display: none;
-}
-
-body:not(.neterror) #certErrorAndCaptivePortalButtonContainer {
-  display: flex;
-}
-
-body:not(.neterror) #netErrorButtonContainer {
-  display: none;
-}
-
-#errorTryAgain {
-  margin-top: 1.2em;
-  min-width: 150px;
-}
-
-#returnButton {
-  min-width: 250px;
-}
-
-#advancedButton {
-  display: none;
-}
-
-body.captiveportal #returnButton {
-  display: none;
-}
-
-body:not(.captiveportal) #openPortalLoginPageButton {
-  display: none;
-}
-
-#openPortalLoginPageButton {
-  margin-inline-start: 0;
-}
-
-body:not(.neterror) #advancedButton {
-  display: block;
-}
-
-#certificateErrorReporting {
-  display: none;
-}
-
-.container {
-  position: relative;
-}
-
-#advancedPanelContainer {
-  position: absolute;
-  padding: 24px 0;
-  width: 100%;
-}
-
-.advanced-panel {
-  /* Hidden until the link is clicked */
-  display: none;
-  background-color: white;
-  border: 1px lightgray solid;
-  /* Don't use top padding because the default p style has top padding, and it
-   * makes the overall div look uneven */
-  padding: 0 12px 12px 12px;
-  box-shadow: 0 0 4px #ddd;
-  font-size: 0.9em;
-}
-
-#overrideWeakCryptoPanel {
-  display: none;
-  flex-direction: row;
-  flex-wrap: wrap;
-  justify-content: space-between;
-  align-content: space-between;
-  align-items: flex-start;
-  margin-top: 1em;
-}
-
-span#hostname {
-  font-weight: bold;
-}
-
-#automaticallyReportInFuture {
-  cursor: pointer;
-  display: inline-block;
-  padding-inline-start: 2.3em;
-  text-indent: -2.3em;
-  line-height: 16px
-}
-
-#errorCode:not([href]) {
-  color: var(--in-content-page-color);
-  cursor: text;
-  text-decoration: none;
-}
-
-#errorCode[href] {
-  white-space: nowrap;
-}
-
-#badCertTechnicalInfo {
-  overflow: auto;
-  white-space: pre-wrap;
-}
-
-#certificateErrorReporting {
-  display: none;
-}
-
-#certificateErrorDebugInformation {
-  display: none;
-  background-color: var(--in-content-box-background-hover) !important;
-  border-top: 1px solid var(--in-content-border-color);
-  position: absolute;
-  left: 0%;
-  top: 100%;
-  width: 65%;
-  padding: 1em 17.5%;
-}
-
-#certificateErrorText {
-  font-family: monospace;
-  white-space: pre-wrap;
-  padding: 1em 0;
-}
diff --git a/browser/themes/shared/aboutSessionRestore.css b/browser/themes/shared/aboutSessionRestore.css
deleted file mode 100644
index 52488af40..000000000
--- a/browser/themes/shared/aboutSessionRestore.css
+++ /dev/null
@@ -1,38 +0,0 @@
-%if 0
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-%endif
-
-.title {
-  background-image: url("chrome://browser/skin/session-restore.svg");
-}
-
-treechildren::-moz-tree-image(icon),
-treechildren::-moz-tree-image(noicon) {
-  padding-right: 2px;
-  margin: 0 2px;
-  width: 16px;
-  height: 16px;
-}
-
-treechildren::-moz-tree-image(noicon) {
-  list-style-image: url("chrome://mozapps/skin/places/defaultFavicon.png");
-}
-treechildren::-moz-tree-image(container, noicon) {
-  list-style-image: url("chrome://browser/skin/aboutSessionRestore-window-icon.png");
-}
-
-treechildren::-moz-tree-image(checked) {
-  list-style-image: url("chrome://global/skin/in-content/check.svg#check");
-}
-treechildren::-moz-tree-image(checked, selected) {
-  list-style-image: url("chrome://global/skin/in-content/check.svg#check-inverted");
-}
-
-treechildren::-moz-tree-image(partial) {
-  list-style-image: url("chrome://global/skin/in-content/check-partial.svg#check-partial");
-}
-treechildren::-moz-tree-image(partial, selected) {
-  list-style-image: url("chrome://global/skin/in-content/check-partial.svg#check-partial-inverted");
-}
diff --git a/browser/themes/shared/aboutSocialError.css b/browser/themes/shared/aboutSocialError.css
deleted file mode 100644
index f5a922ff4..000000000
--- a/browser/themes/shared/aboutSocialError.css
+++ /dev/null
@@ -1,40 +0,0 @@
-@import url("chrome://global/skin/in-content/common.css");
-
-#errorPageContainer {
-  min-width: 50%;
-}
-
-#errorTitle {
-  background: url("chrome://global/skin/icons/info.svg") left 0 no-repeat;
-  background-size: 2em;
-  padding-inline-start: 3em;
-}
-
-#button-box {
-  text-align: center;
-  width: 75%;
-  margin: 0 auto;
-}
-
-button {
-  width: auto !important;
-  min-width: 150px;
-}
-
-@media all and (max-width: 300px) {
-  body {
-    padding: 0px 10px;
-  }
-  #errorPageContainer {
-    min-width: 100%;
-  }
-  #errorTitle {
-    background: none;
-    padding-inline-start: 0 !important;
-  }
-  button {
-    width: auto !important;
-    min-width: auto !important;
-  }
-}
-
diff --git a/browser/themes/shared/aboutTabCrashed.css b/browser/themes/shared/aboutTabCrashed.css
deleted file mode 100644
index 264fb4275..000000000
--- a/browser/themes/shared/aboutTabCrashed.css
+++ /dev/null
@@ -1,101 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-body {
-  font-size: 1.25rem;
-}
-
-.title {
-  background-image: url("chrome://browser/skin/tab-crashed.svg");
-}
-
-.title > h1,
-.offers {
-  margin-left: 14px;
-}
-
-.title > h1 {
-  /**
-   * Add commentary?
-   */
-  padding-right: 14px;
-}
-
-.container {
-  width: 45%;
-}
-
-#reportSent {
-  font-weight: bold;
-}
-
-#reportBox {
-  background-color: var(--in-content-box-background-hover);
-  margin: 24px 0;
-  padding: 14px;
-  border: 1px solid var(--in-content-box-border-color);
-  border-radius: 2px;
-}
-
-#reportBox > h2:first-child {
-  margin-top: 0;
-}
-
-#crash-reporter-title {
-  font-weight: bold;
-  margin: 0 0 14px 0;
-}
-
-input[type="text"],
-textarea {
-  width: 100%;
-  box-sizing: border-box;
-  resize: none;
-}
-
-input[type="text"],
-input[type="checkbox"] {
-  -moz-margin-start: 0px;
-}
-
-#options {
-  list-style: none;
-  margin-inline-start: 0;
-}
-
-#options > li,
-#email {
-  margin-top: 14px;
-}
-
-.checkbox-with-label {
-  display: flex;
-}
-
-.checkbox-with-label > label {
-  margin-top: auto;
-  margin-bottom: auto;
-}
-
-/**
- * Hack alert: the #autoSubmit checkbox has a long label, which means
- * it often wraps, at least in en-US. Bug 418833 and bug 1317795 allows
- * us to fix this properly, but bug 418833 didn't uplift in time for this
- * release. We use some hackery here to make sure that this label wraps
- * properly, and doesn't end up underneath the checkbox pseudoelement.
- * We do this by setting a negative margin on the pseudoelement, and then
- * a positive equivalent margin on the label itself.
- *
- * The magic number of 35px is derived from the total width of the checkbox.
- * The checkbox width is explicitly set at 23px. This, plus the 1px border on either
- * side gives us 25px. Then there's the 10px margin-inline-end, which gives us 35px.
- */
-#autoSubmit + label:before {
-  margin-inline-start: -35px;
-}
-
-#autoSubmit + label {
-  margin-inline-start: 35px;
-  line-height: 1.75em;
-}
\ No newline at end of file
diff --git a/browser/themes/shared/aboutWelcomeBack.css b/browser/themes/shared/aboutWelcomeBack.css
deleted file mode 100644
index 815ad462e..000000000
--- a/browser/themes/shared/aboutWelcomeBack.css
+++ /dev/null
@@ -1,47 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-.title {
-  background-image: url("chrome://browser/skin/welcome-back.svg");
-}
-
-.radioRestoreContainer:not(:last-child) {
-  margin-bottom: 0.2em;
-}
-
-/* tablist starts out hidden, but JS may make it visible in response to
-   clicks on the radio buttons by setting an "available" attribute.
-*/
-.tree-container:not([available]) {
-  display: none;
-}
-
-treechildren::-moz-tree-image(icon),
-treechildren::-moz-tree-image(noicon) {
-  padding-right: 2px;
-  margin: 0 2px;
-  width: 16px;
-  height: 16px;
-}
-
-treechildren::-moz-tree-image(noicon) {
-  list-style-image: url("chrome://mozapps/skin/places/defaultFavicon.png");
-}
-treechildren::-moz-tree-image(container, noicon) {
-  list-style-image: url("chrome://browser/skin/aboutSessionRestore-window-icon.png");
-}
-
-treechildren::-moz-tree-image(checked) {
-  list-style-image: url("chrome://global/skin/in-content/check.svg#check");
-}
-treechildren::-moz-tree-image(checked, selected) {
-  list-style-image: url("chrome://global/skin/in-content/check.svg#check-inverted");
-}
-
-treechildren::-moz-tree-image(partial) {
-  list-style-image: url("chrome://global/skin/in-content/check-partial.svg#check-partial");
-}
-treechildren::-moz-tree-image(partial, selected) {
-  list-style-image: url("chrome://global/skin/in-content/check-partial.svg#check-partial-inverted");
-}
diff --git a/browser/themes/shared/addons/addon-install-anchor.svg b/browser/themes/shared/addons/addon-install-anchor.svg
deleted file mode 100644
index 1ee69ca0d..000000000
--- a/browser/themes/shared/addons/addon-install-anchor.svg
+++ /dev/null
@@ -1,13 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!-- This Source Code Form is subject to the terms of the Mozilla Public
-   - License, v. 2.0. If a copy of the MPL was not distributed with this
-   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
-<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"
-     class="fieldtext"
-     width="16" height="16" viewBox="0 0 16 16">
-#include ../icon-colors.inc.svg
-  <defs>
-    <path id="shape-notifications-addons" d="M10,15c0.5,0,1-0.4,1-1v-3c0,0,0-0.8,0.8-0.8c0.6,0,0.6,0.8,1.8,0.8c0.6,0,1.5-0.2,1.5-2c0-1.8-0.9-2-1.5-2 c-1.1,0-1.1,0.7-1.8,0.7C11,7.7,11,7,11,7V6c0-0.6-0.5-1-1-1H8c0,0-0.8,0-0.8-0.8C7.2,3.6,8,3.6,8,2.5C8,1.9,7.8,1,6,1 C4.2,1,4,1.9,4,2.5c0,1.1,0.8,1.1,0.8,1.8C4.8,5,4,5,4,5H2C1.5,5,1,5.4,1,6l0,1.5c0,0-0.1,1,1.1,1c0.8,0,0.9-1,1.9-1 C4.5,7.4,5,8,5,9c0,1-0.5,1.6-1,1.6c-1,0-1.1-1.1-1.9-1.1C0.9,9.5,1,10.8,1,10.8V14c0,0.6,0.5,1,1,1l2.6,0c0,0,1.1,0,1.1-1 c0-0.8-1-0.1-1-1.1c0-0.5,0.7-1.2,1.8-1.2s1.8,0.7,1.8,1.2c0,1-1.1,0.3-1.1,1.1c0,1,1.2,1,1.2,1H10z"/>
-  </defs>
-  <use xlink:href="#shape-notifications-addons"/>
-</svg>
diff --git a/browser/themes/shared/addons/addon-install-blocked.svg b/browser/themes/shared/addons/addon-install-blocked.svg
deleted file mode 100644
index caaaa466b..000000000
--- a/browser/themes/shared/addons/addon-install-blocked.svg
+++ /dev/null
@@ -1,38 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!-- This Source Code Form is subject to the terms of the Mozilla Public
-   - License, v. 2.0. If a copy of the MPL was not distributed with this
-   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
-<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"
-     width="64" height="64" viewBox="0 0 64 64">
-  <defs>
-    <style>
-      .style-puzzle-piece {
-        fill: url('#gradient-linear-puzzle-piece');
-      }
-      .style-badge-shadow {
-        fill: #0d131a;
-        fill-opacity: .15;
-      }
-      .style-badge-background {
-        fill: #fff;
-      }
-      .style-badge-inside {
-        fill: #e62117;
-      }
-      .style-badge-icon {
-        fill: #fff;
-      }
-    </style>
-    <linearGradient id="gradient-linear-puzzle-piece" x1="0%" y1="0%" x2="0%" y2="100%">
-      <stop offset="0%" stop-color="#999999" stop-opacity="1"/>
-      <stop offset="100%" stop-color="#8c8c8c" stop-opacity="1"/>
-    </linearGradient>
-  </defs>
-  <path class="style-puzzle-piece" d="M42,62c2.2,0,4-1.8,4-4l0-14.2c0,0,0.4-3.7,2.8-3.7c2.4,0,2.2,3.9,6.7,3.9c2.3,0,6.2-1.2,6.2-8.2 c0-7-3.9-7.9-6.2-7.9c-4.5,0-4.3,3.7-6.7,3.7c-2.4,0-2.8-3.8-2.8-3.8V22c0-2.2-1.8-4-4-4H31.5c0,0-3.4-0.6-3.4-3 c0-2.4,3.8-2.6,3.8-7.1c0-2.3-1.3-5.9-8.3-5.9s-8,3.6-8,5.9c0,4.5,3.4,4.7,3.4,7.1c0,2.4-3.4,3-3.4,3H6c-2.2,0-4,1.8-4,4l0,7.8 c0,0-0.4,6,4.4,6c3.1,0,3.2-4.1,7.3-4.1c2,0,4,1.9,4,6c0,4.2-2,6.3-4,6.3c-4,0-4.2-4.1-7.3-4.1c-4.8,0-4.4,5.8-4.4,5.8L2,58 c0,2.2,1.8,4,4,4H19c0,0,6.3,0.4,6.3-4.4c0-3.1-4-3.6-4-7.7c0-2,2.2-4.5,6.4-4.5c4.2,0,6.6,2.5,6.6,4.5c0,4-3.9,4.6-3.9,7.7 c0,4.9,6.3,4.4,6.3,4.4H42z"/>
-  <svg width="32" height="32" x="32" y="0">
-    <ellipse class="style-badge-shadow"     rx="14" ry="15" cx="16" cy="17" />
-    <circle  class="style-badge-background" r="15"  cy="15" cx="16" />
-    <circle  class="style-badge-inside"     r="12"  cy="15" cx="16" />
-    <rect    class="style-badge-icon"       x="9" y="13" width="14" height="4" rx="1" ry="1" />
-  </svg>
-</svg>
diff --git a/browser/themes/shared/addons/addon-install-confirm.svg b/browser/themes/shared/addons/addon-install-confirm.svg
deleted file mode 100644
index a16455253..000000000
--- a/browser/themes/shared/addons/addon-install-confirm.svg
+++ /dev/null
@@ -1,19 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!-- This Source Code Form is subject to the terms of the Mozilla Public
-   - License, v. 2.0. If a copy of the MPL was not distributed with this
-   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
-<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"
-     width="64" height="64" viewBox="0 0 64 64">
-  <defs>
-    <style>
-      .style-puzzle-piece {
-        fill: url('#gradient-linear-puzzle-piece');
-      }
-    </style>
-    <linearGradient id="gradient-linear-puzzle-piece" x1="0%" y1="0%" x2="0%" y2="100%">
-      <stop offset="0%" stop-color="#66cc52" stop-opacity="1"/>
-      <stop offset="100%" stop-color="#60bf4c" stop-opacity="1"/>
-    </linearGradient>
-  </defs>
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deleted file mode 100644
index 9dcc8069c..000000000
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+++ /dev/null
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diff --git a/browser/themes/shared/addons/addon-install-error.svg b/browser/themes/shared/addons/addon-install-error.svg
deleted file mode 100644
index e25950f25..000000000
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diff --git a/browser/themes/shared/addons/addon-install-installed.svg b/browser/themes/shared/addons/addon-install-installed.svg
deleted file mode 100644
index 3b352c21d..000000000
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diff --git a/browser/themes/shared/addons/addon-install-restart.svg b/browser/themes/shared/addons/addon-install-restart.svg
deleted file mode 100644
index e3269c3b1..000000000
--- a/browser/themes/shared/addons/addon-install-restart.svg
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diff --git a/browser/themes/shared/addons/addon-install-warning.svg b/browser/themes/shared/addons/addon-install-warning.svg
deleted file mode 100644
index bac1903c6..000000000
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-    </linearGradient>
-  </defs>
-  <path class="style-puzzle-piece" d="M42,62c2.2,0,4-1.8,4-4l0-14.2c0,0,0.4-3.7,2.8-3.7c2.4,0,2.2,3.9,6.7,3.9c2.3,0,6.2-1.2,6.2-8.2 c0-7-3.9-7.9-6.2-7.9c-4.5,0-4.3,3.7-6.7,3.7c-2.4,0-2.8-3.8-2.8-3.8V22c0-2.2-1.8-4-4-4H31.5c0,0-3.4-0.6-3.4-3 c0-2.4,3.8-2.6,3.8-7.1c0-2.3-1.3-5.9-8.3-5.9s-8,3.6-8,5.9c0,4.5,3.4,4.7,3.4,7.1c0,2.4-3.4,3-3.4,3H6c-2.2,0-4,1.8-4,4l0,7.8 c0,0-0.4,6,4.4,6c3.1,0,3.2-4.1,7.3-4.1c2,0,4,1.9,4,6c0,4.2-2,6.3-4,6.3c-4,0-4.2-4.1-7.3-4.1c-4.8,0-4.4,5.8-4.4,5.8L2,58 c0,2.2,1.8,4,4,4H19c0,0,6.3,0.4,6.3-4.4c0-3.1-4-3.6-4-7.7c0-2,2.2-4.5,6.4-4.5c4.2,0,6.6,2.5,6.6,4.5c0,4-3.9,4.6-3.9,7.7 c0,4.9,6.3,4.4,6.3,4.4H42z"/>
-  <svg width="32" height="32" x="32" y="0">
-    <path class="style-badge-shadow" d="M29.5,25.8L18.7,4c-0.6-1.2-1.6-2-2.7-2c-1.1,0-2.1,0.7-2.7,2L2.5,25.8 c-0.6,1.2-0.6,2.5-0.1,3.6C2.9,30.4,4,31,5.2,31h21.6c1.2,0,2.3-0.6,2.8-1.6C30.2,28.4,30.1,27.1,29.5,25.8z" />
-    <path class="style-badge-background" d="M16,0c-1.7,0-3.2,1-4.1,2.7L1.7,21.9c-0.9,1.7-0.9,3.4,0,4.8C2.5,28.2,4.1,29,5.9,29H26 c1.9,0,3.4-0.8,4.3-2.2c0.9-1.4,0.8-3.2,0-4.8L20.1,2.7C19.2,1,17.7,0,16,0L16,0z" />
-    <path class="style-badge-inside" d="M5.9,26c-1.7,0-2.4-1.2-1.6-2.7L14.6,4.1c0.8-1.5,2.1-1.5,2.8,0l10.3,19.3 c0.8,1.5,0.1,2.7-1.6,2.7H5.9z" />
-    <path class="style-badge-icon" d="M14.9,17.6c0,0,0.1,0.7,1.1,0.7c1,0,1.1-0.7,1.1-0.7 s0.7-2.9,0.8-4.2c0.1-1.3,0.5-3.2-1.9-3.2c-2.4,0-2,1.9-1.9,3.2C14.2,14.8,14.9,17.6,14.9,17.6z M16,20c-1.1,0-2,0.9-2,2 c0,1.1,0.9,2,2,2c1.1,0,2-0.9,2-2C18,20.9,17.1,20,16,20z" />
-  </svg>
-</svg>
diff --git a/browser/themes/shared/autocomplete.inc.css b/browser/themes/shared/autocomplete.inc.css
deleted file mode 100644
index d9923a7e7..000000000
--- a/browser/themes/shared/autocomplete.inc.css
+++ /dev/null
@@ -1,65 +0,0 @@
-%if 0
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-%endif
-
-#PopupAutoComplete > richlistbox > richlistitem {
-  height: 20px;
-  min-height: 20px;
-  border: 0;
-  border-radius: 0;
-  padding: 0px 1px 0px 1px;
-}
-
-#PopupAutoComplete > richlistbox > richlistitem > .ac-site-icon {
-  margin-inline-start: 4px;
-  margin-inline-end: 0;
-}
-
-#PopupAutoComplete > richlistbox > richlistitem > .ac-title {
-  font: icon;
-  margin-inline-start: 4px;
-}
-
-#PopupAutoComplete > richlistbox {
-  padding: 0;
-}
-
-
-/* Login form autocompletion */
-#PopupAutoComplete > richlistbox > richlistitem[originaltype="login"] > .ac-site-icon {
-  display: initial;
-  list-style-image: url(chrome://browser/skin/notification-icons.svg#login);
-}
-
-#PopupAutoComplete > richlistbox > richlistitem[originaltype="login"] > .ac-site-icon[selected] {
-  list-style-image: url(chrome://browser/skin/notification-icons.svg#login-highlighted);
-}
-
-
-/* Insecure field warning */
-#PopupAutoComplete > richlistbox > richlistitem[originaltype="insecureWarning"] {
-  background-color: var(--arrowpanel-dimmed);
-  border-bottom: 1px solid var(--panel-separator-color);
-  padding-bottom: 4px;
-  padding-top: 4px;
-}
-
-#PopupAutoComplete > richlistbox > richlistitem[originaltype="insecureWarning"][selected] {
-  background-color: var(--arrowpanel-dimmed-further);
-  color: -moz-DialogText;
-}
-
-#PopupAutoComplete > richlistbox > richlistitem[originaltype="insecureWarning"] > .ac-title {
-  color: GrayText;
-  font-size: 1em;
-}
-
-#PopupAutoComplete > richlistbox > richlistitem[originaltype="insecureWarning"][selected] > .ac-title {
-  color: inherit;
-}
-
-#PopupAutoComplete > richlistbox > richlistitem[originaltype="insecureWarning"] > .ac-site-icon {
-  list-style-image: url(chrome://browser/skin/connection-mixed-active-loaded.svg#icon);
-}
diff --git a/browser/themes/shared/blockedSite.css b/browser/themes/shared/blockedSite.css
deleted file mode 100644
index 49846ee89..000000000
--- a/browser/themes/shared/blockedSite.css
+++ /dev/null
@@ -1,65 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-@import url("chrome://browser/skin/error-pages.css");
-
-body {
-  background-image: linear-gradient(-45deg, #9b2e2e,     #9b2e2e 33%,
-                                            #a83232 33%, #a83232 66%,
-                                            #9b2e2e 66%, #9b2e2e);
-  background-color: #b14646;
-  color: white;
-}
-
-.title {
-  background-image: url("chrome://global/skin/icons/blocked.svg");
-}
-
-.title-text {
-  color: white;
-}
-
-.button-container button:not(.primary) {
-  background-color: transparent;
-  color: white;
-  border: 1px solid #9b2e2e;
-  margin-inline-end: 0;
-}
-
-.button-container button:not(.primary):hover {
-  background-color: #a83232;
-}
-
-.button-container button:not(.primary):active {
-  background-color: #9b2e2e;
-}
-
-.button-container button {
-  margin-top: 1.2em;
-}
-
-/* Style warning button to look like a small text link in the
-   bottom right. This is preferable to just using a text link
-   since there is already a mechanism in browser.js for trapping
-   oncommand events from unprivileged chrome pages (BrowserOnCommand).*/
-#ignoreWarningButton {
-  -moz-appearance: none;
-  background: transparent;
-  border: none;
-  color: white;
-  text-decoration: underline;
-  margin: 4px 0 0 0;
-  padding: 0;
-  font-size: smaller;
-  min-width: 0;
-}
-
-#ignoreWarningButton:hover {
-  cursor: pointer;
-}
-
-#ignoreWarning {
-  margin-top: 1.2em;
-  text-align: end;
-}
diff --git a/browser/themes/shared/browser.inc b/browser/themes/shared/browser.inc
deleted file mode 100644
index 81caf94d6..000000000
--- a/browser/themes/shared/browser.inc
+++ /dev/null
@@ -1,13 +0,0 @@
-%filter substitution
-
-% Note that zoom-reset-button is a bit different since it doesn't use an image and thus has the image with display: none.
-%define nestedButtons #zoom-out-button, #zoom-reset-button, #zoom-in-button, #cut-button, #copy-button, #paste-button
-%define primaryToolbarButtons #back-button, #forward-button, #home-button, #print-button, #downloads-button, #bookmarks-menu-button, #new-tab-button, #new-window-button, #fullscreen-button, #sync-button, #feed-button, #open-file-button, #find-button, #developer-button, #preferences-button, #privatebrowsing-button, #save-page-button, #add-ons-button, #history-panelmenu, #nav-bar-overflow-button, #PanelUI-menu-button, #characterencoding-button, #email-link-button, #sidebar-button, @nestedButtons@, #e10s-button, #panic-button, #webide-button, #containers-panelmenu
-
-%ifdef XP_MACOSX
-% Prior to 10.7 there wasn't a native fullscreen button so we use #restore-button to exit fullscreen
-% and want it to behave like other toolbar buttons.
-%define primaryToolbarButtons @primaryToolbarButtons@, #restore-button
-%endif
-
-%define inAnyPanel :-moz-any(:not([cui-areatype="toolbar"]), [overflowedItem=true])
diff --git a/browser/themes/shared/content-contextmenu.svg b/browser/themes/shared/content-contextmenu.svg
deleted file mode 100644
index 6b53c13d9..000000000
--- a/browser/themes/shared/content-contextmenu.svg
+++ /dev/null
@@ -1,18 +0,0 @@
-<?xml version="1.0"?>
-<!-- This Source Code Form is subject to the terms of the Mozilla Public
-   - License, v. 2.0. If a copy of the MPL was not distributed with this
-   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
-<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 16 16">
-  <style>
-    path:not(:target),
-    polygon:not(:target) {
-      display: none;
-    }
-  </style>
-  <path id="back" fill-rule="evenodd" d="M1.192,8.893L2.21,9.964c0.064,0.065,0.136,0.117,0.214,0.159 l5.199,5.301c0.607,0.63,1.465,0.764,1.915,0.297l1.02-1.082c0.449-0.467,0.32-1.357-0.288-1.99l-2.116-2.158h5.705 c0.671,0,1.215-0.544,1.215-1.215v-2.43c0-0.671-0.544-1.215-1.215-1.215H8.094l2.271-2.309c0.609-0.626,0.737-1.512,0.288-1.974 L9.635,0.278C9.184-0.188,8.327-0.055,7.718,0.575L2.479,5.901C2.38,5.946,2.289,6.008,2.21,6.089L1.192,7.171 c-0.21,0.219-0.293,0.53-0.26,0.864C0.899,8.367,0.981,8.676,1.192,8.893z"/>
-  <path id="forward" fill-rule="evenodd" d="M14.808,7.107L13.79,6.036c-0.064-0.065-0.136-0.117-0.214-0.159 L8.377,0.576C7.77-0.054,6.912-0.189,6.461,0.278L5.441,1.36c-0.449,0.467-0.32,1.357,0.288,1.99l2.116,2.158H2.14 c-0.671,0-1.215,0.544-1.215,1.215v2.43c0,0.671,0.544,1.215,1.215,1.215h5.765l-2.271,2.309c-0.609,0.626-0.737,1.512-0.288,1.974 l1.019,1.072c0.451,0.465,1.308,0.332,1.917-0.297l5.238-5.326c0.1-0.045,0.191-0.107,0.269-0.188l1.019-1.082 c0.21-0.219,0.293-0.53,0.26-0.864C15.101,7.633,15.019,7.324,14.808,7.107z"/>
-  <path id="reload" fill-rule="evenodd" d="M15.429,8h-8l3.207-3.207C9.889,4.265,8.986,3.947,8,3.947 c-2.554,0-4.625,2.071-4.625,4.625S5.446,13.196,8,13.196c1.638,0,3.069-0.857,3.891-2.141l2.576,1.104 C13.199,14.439,10.794,16,8,16c-4.103,0-7.429-3.326-7.429-7.429S3.897,1.143,8,1.143c1.762,0,3.366,0.624,4.631,1.654L15.429,0V8z"/>
-  <polygon id="stop" points="16,2.748 13.338,0.079 8.038,5.391 2.661,0 0,2.669 5.377,8.059 0.157,13.292 2.819,15.961 8.039,10.728 13.298,16 15.959,13.331 10.701,8.06"/>
-  <path id="bookmark" d="M8.008,3.632l0.986,2.012l0.452,0.922l1.014,0.169l2.326,0.389l-1.719,1.799l-0.676,0.708l0.145,0.967 L10.896,13l-1.959-1.039l-0.937-0.497l-0.937,0.497l-1.957,1.038L5.468,10.6l0.146-0.968L4.937,8.924L3.219,7.126l2.351-0.39 l1.023-0.17l0.45-0.934L8.008,3.632 M8,0C7.72,0,7.44,0.217,7.228,0.65L5.242,4.766L0.907,5.485c-0.958,0.159-1.195,0.861-0.53,1.56 l3.113,3.258l-0.69,4.583c-0.105,0.689,0.172,1.092,0.658,1.092c0.185,0,0.399-0.058,0.635-0.181l3.906-2.072l3.906,2.072 c0.236,0.123,0.45,0.181,0.635,0.181c0.486,0,0.762-0.403,0.659-1.092l-0.687-4.583l3.109-3.255c0.666-0.702,0.428-1.404-0.53-1.564 l-4.303-0.719L8.772,0.65C8.56,0.217,8.28,0,8,0L8,0z"/>
-  <path id="bookmarked" d="M8,0C7.719,0,7.438,0.217,7.225,0.651L5.233,4.773l-4.35,0.72c-0.961,0.159-1.199,0.862-0.531,1.562 l3.124,3.262l-0.692,4.589C2.679,15.596,2.957,16,3.444,16c0.185,0,0.401-0.058,0.637-0.181L8,13.744l3.919,2.075 C12.156,15.942,12.372,16,12.557,16c0.487,0,0.764-0.404,0.661-1.094l-0.69-4.589l3.12-3.259c0.668-0.703,0.43-1.406-0.532-1.566 l-4.317-0.72L8.775,0.651C8.562,0.217,8.281,0,8,0L8,0z"/>
-</svg>
diff --git a/browser/themes/shared/contextmenu.inc.css b/browser/themes/shared/contextmenu.inc.css
deleted file mode 100644
index 2ec60b55b..000000000
--- a/browser/themes/shared/contextmenu.inc.css
+++ /dev/null
@@ -1,51 +0,0 @@
-#context-navigation > .menuitem-iconic {
-  -moz-box-flex: 1;
-  -moz-box-pack: center;
-  -moz-box-align: center;
-}
-
-#context-navigation > .menuitem-iconic > .menu-iconic-left {
-  -moz-appearance: none;
-}
-
-#context-navigation > .menuitem-iconic > .menu-iconic-left > .menu-iconic-icon {
-  width: 16px;
-  height: 16px;
-  margin: 7px;
-  filter: url(chrome://browser/skin/filters.svg#fill);
-  fill: currentColor;
-}
-
-#context-back {
-  list-style-image: url("chrome://browser/skin/content-contextmenu.svg#back");
-}
-
-#context-forward {
-  list-style-image: url("chrome://browser/skin/content-contextmenu.svg#forward");
-}
-
-#context-reload {
-  list-style-image: url("chrome://browser/skin/content-contextmenu.svg#reload");
-}
-
-#context-stop {
-  list-style-image: url("chrome://browser/skin/content-contextmenu.svg#stop");
-}
-
-#context-bookmarkpage {
-  list-style-image: url("chrome://browser/skin/content-contextmenu.svg#bookmark");
-}
-
-#context-bookmarkpage[starred=true] {
-  list-style-image: url("chrome://browser/skin/content-contextmenu.svg#bookmarked");
-}
-
-#context-back:-moz-locale-dir(rtl),
-#context-forward:-moz-locale-dir(rtl),
-#context-reload:-moz-locale-dir(rtl) {
-  transform: scaleX(-1);
-}
-
-#context-media-eme-learnmore {
-  list-style-image: url("chrome://browser/skin/drm-icon.svg#chains");
-}
diff --git a/browser/themes/shared/controlcenter/arrow-subview-back.svg b/browser/themes/shared/controlcenter/arrow-subview-back.svg
deleted file mode 100644
index 9f681207c..000000000
--- a/browser/themes/shared/controlcenter/arrow-subview-back.svg
+++ /dev/null
@@ -1,8 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!-- This Source Code Form is subject to the terms of the Mozilla Public
-   - License, v. 2.0. If a copy of the MPL was not distributed with this
-   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
-<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 16 16">
-#include ../icon-colors.inc.svg
-  <polygon class="highlighttext" points="12,3.5 10.5,2 4.625,8 10.5,14 12,12.5 7.625,8"/>
-</svg>
diff --git a/browser/themes/shared/controlcenter/arrow-subview.svg b/browser/themes/shared/controlcenter/arrow-subview.svg
deleted file mode 100644
index 2802fa055..000000000
--- a/browser/themes/shared/controlcenter/arrow-subview.svg
+++ /dev/null
@@ -1,8 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!-- This Source Code Form is subject to the terms of the Mozilla Public
-   - License, v. 2.0. If a copy of the MPL was not distributed with this
-   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
-<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 16 16">
-#include ../icon-colors.inc.svg
-  <polygon class="fieldtext" points="5,3.5 6.5,2 12.375,8 6.5,14 5,12.5 9.375,8"/>
-</svg>
diff --git a/browser/themes/shared/controlcenter/conn-not-secure.svg b/browser/themes/shared/controlcenter/conn-not-secure.svg
deleted file mode 100644
index ef2df7c69..000000000
--- a/browser/themes/shared/controlcenter/conn-not-secure.svg
+++ /dev/null
@@ -1,15 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!-- This Source Code Form is subject to the terms of the Mozilla Public
-   - License, v. 2.0. If a copy of the MPL was not distributed with this
-   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
-<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24">
-#include ../icon-colors.inc.svg
-  <defs>
-    <mask id="mask-globe">
-      <circle fill="#fff" cx="12" cy="12" r="11"/>
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-    </mask>
-  </defs>
-
-  <rect width="24" height="24" mask="url(#mask-globe)" class="fieldtext"/>
-</svg>
diff --git a/browser/themes/shared/controlcenter/connection.svg b/browser/themes/shared/controlcenter/connection.svg
deleted file mode 100644
index 85396d68f..000000000
--- a/browser/themes/shared/controlcenter/connection.svg
+++ /dev/null
@@ -1,37 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!-- This Source Code Form is subject to the terms of the Mozilla Public
-   - License, v. 2.0. If a copy of the MPL was not distributed with this
-   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
-<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"
-     width="24" height="24" viewBox="0 0 24 24">
-#include ../icon-colors.inc.svg
-  <style>
-    svg > rect:not(:target) {
-      display: none;
-    }
-
-    #connection-secure {
-      fill: #4d9a26;
-    }
-  </style>
-
-  <defs>
-    <rect id="shape-lock-clasp-outer" x="5" y="1" width="14" height="20" rx="7" ry="7" />
-    <rect id="shape-lock-clasp-inner" x="8" y="4" width="8" height="14" rx="4" ry="4" />
-    <rect id="shape-lock-base" x="3" y="10" width="18" height="13" rx="1.5" ry="1.5" />
-
-    <mask id="mask-clasp-cutout">
-      <rect width="24" height="24" fill="#000" />
-      <use xlink:href="#shape-lock-clasp-outer" fill="#fff" />
-      <use xlink:href="#shape-lock-clasp-inner" fill="#000" />
-    </mask>
-
-    <mask id="mask-lock">
-      <use xlink:href="#shape-lock-clasp-outer" mask="url(#mask-clasp-cutout)" fill="#fff"/>
-      <use xlink:href="#shape-lock-base" fill="#fff"/>
-    </mask>
-  </defs>
-
-  <rect id="connection-degraded" class="fieldtext" width="24" height="24" mask="url(#mask-lock)"/>
-  <rect id="connection-secure" width="24" height="24" mask="url(#mask-lock)"/>
-</svg>
diff --git a/browser/themes/shared/controlcenter/mcb-disabled.svg b/browser/themes/shared/controlcenter/mcb-disabled.svg
deleted file mode 100644
index 76bad47ee..000000000
--- a/browser/themes/shared/controlcenter/mcb-disabled.svg
+++ /dev/null
@@ -1,34 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!-- This Source Code Form is subject to the terms of the Mozilla Public
-   - License, v. 2.0. If a copy of the MPL was not distributed with this
-   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
-<svg xmlns="http://www.w3.org/2000/svg"
-     xmlns:xlink="http://www.w3.org/1999/xlink"
-     width="24" height="24" viewBox="0 0 24 24">
-#include ../icon-colors.inc.svg
-  <defs>
-    <rect id="shape-lock-clasp-outer" x="5" y="1" width="14" height="20" rx="7" ry="7" />
-    <rect id="shape-lock-clasp-inner" x="8" y="4" width="8" height="14" rx="4" ry="4" />
-    <rect id="shape-lock-base" x="3" y="10" width="18" height="13" rx="1.5" ry="1.5" />
-
-    <mask id="mask-clasp-cutout">
-      <rect width="24" height="24" fill="#000" />
-      <use xlink:href="#shape-lock-clasp-outer" fill="#fff" />
-      <use xlink:href="#shape-lock-clasp-inner" fill="#000" />
-      <line x1="3" y1="21" x2="21.5" y2="0.5" stroke="#000" stroke-width="3" />
-      <line x1="3" y1="25" x2="21.5" y2="4.5" stroke="#000" stroke-width="3" />
-      <rect x="3" y="10" width="18" height="13" rx="1.5" ry="1.5" />
-    </mask>
-
-    <mask id="mask-base-cutout">
-      <rect width="24" height="24" fill="#000" />
-      <use xlink:href="#shape-lock-base" fill="#fff" />
-      <line x1="2.25" y1="24.75" x2="21.5" y2="4.5" stroke="#000" stroke-width="3" />
-    </mask>
-  </defs>
-
-  <use class="fieldtext" xlink:href="#shape-lock-clasp-outer" mask="url(#mask-clasp-cutout)"/>
-  <use class="fieldtext" xlink:href="#shape-lock-base" mask="url(#mask-base-cutout)"/>
-
-  <line x1="2.25" y1="22.75" x2="21.5" y2="2.5" stroke="#d92d21" stroke-width="3" />
-</svg>
diff --git a/browser/themes/shared/controlcenter/panel.inc.css b/browser/themes/shared/controlcenter/panel.inc.css
deleted file mode 100644
index a0f3aa854..000000000
--- a/browser/themes/shared/controlcenter/panel.inc.css
+++ /dev/null
@@ -1,445 +0,0 @@
-%if 0
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-%endif
-
-/* Hide all conditional elements by default. */
-:-moz-any([when-connection],[when-mixedcontent],[when-ciphers],[when-loginforms]) {
-  display: none;
-}
-
-/* Show the right elements for the right connection states. */
-#identity-popup[connection=not-secure] [when-connection~=not-secure],
-#identity-popup[connection=secure-cert-user-overridden] [when-connection~=secure-cert-user-overridden],
-#identity-popup[connection=secure-ev] [when-connection~=secure-ev],
-#identity-popup[connection=secure] [when-connection~=secure],
-#identity-popup[connection=chrome] [when-connection~=chrome],
-#identity-popup[connection=file] [when-connection~=file],
-/* Show insecure login forms messages when needed. */
-#identity-popup[loginforms=insecure] [when-loginforms=insecure],
-/* Show weak cipher messages when needed. */
-#identity-popup[ciphers=weak] [when-ciphers~=weak],
-/* Show mixed content warnings when needed */
-#identity-popup[mixedcontent~=active-loaded] [when-mixedcontent=active-loaded],
-#identity-popup[mixedcontent~=passive-loaded]:not([mixedcontent~=active-loaded]) [when-mixedcontent=passive-loaded],
-#identity-popup[mixedcontent~=active-blocked]:not([mixedcontent~=passive-loaded]) [when-mixedcontent=active-blocked],
-/* Show the right elements when there is mixed passive content loaded and active blocked. */
-#identity-popup[mixedcontent~=active-blocked][mixedcontent~=passive-loaded] [when-mixedcontent~=active-blocked][when-mixedcontent~=passive-loaded],
-/* Show 'disable MCB' button always when there is mixed active content blocked. */
-#identity-popup-securityView-body[mixedcontent~=active-blocked] > button[when-mixedcontent=active-blocked] {
-  display: inherit;
-}
-
-/* Hide redundant messages based on insecure login forms presence. */
-#identity-popup[loginforms=secure] [and-when-loginforms=insecure] {
-  display: none;
-}
-#identity-popup[loginforms=insecure] [and-when-loginforms=secure] {
-  display: none;
-}
-
-/* Hide 'not secure' message in subview when weak cipher or mixed content messages are shown. */
-#identity-popup-securityView-body:-moz-any([mixedcontent],[ciphers]) > description[when-connection=not-secure],
-/* Hide 'passive-loaded (only)' message when there is mixed passive content loaded and active blocked. */
-#identity-popup-securityView-body[mixedcontent~=passive-loaded][mixedcontent~=active-blocked] > description[when-mixedcontent=passive-loaded] {
-  display: none;
-}
-
-/* Make sure hidden elements don't accidentally become visible from one of the
-   above selectors (see Bug 1194258) */
-#identity-popup [hidden] {
-  display: none !important;
-}
-
-#identity-popup,
-#identity-popup:not([panelopen]) .panel-viewstack[viewtype="main"]:not([transitioning]) #identity-popup-mainView {
-  /* Tiny hack to ensure the panel shrinks back to its original
-     size after closing a subview that is bigger than the main view. */
-  max-height: 0;
-}
-
-.panel-mainview[panelid=identity-popup][viewtype=subview] > #identity-popup-mainView menulist,
-.panel-mainview[panelid=identity-popup][viewtype=subview] > #identity-popup-mainView button:not([panel-multiview-anchor]) {
-  -moz-user-focus: ignore;
-}
-
-#identity-popup > .panel-arrowcontainer > .panel-arrowcontent {
-  padding: 0;
-}
-
-.panel-mainview[panelid=identity-popup] {
-  min-width: 30em;
-}
-
-#identity-popup-multiView > .panel-viewcontainer > .panel-viewstack[viewtype="main"] > .panel-subviews {
-  transform: translateX(100%);
-  box-shadow: none;
-}
-
-#identity-popup-multiView > .panel-viewcontainer > .panel-viewstack[viewtype="main"] > .panel-subviews:-moz-locale-dir(rtl) {
-  transform: translateX(-100%);
-}
-
-#identity-popup-multiView > .panel-viewcontainer > .panel-viewstack > .panel-subviews {
-  background: var(--arrowpanel-background);
-  padding: 0;
-}
-
-.identity-popup-section:not(:first-child) {
-  border-top: 1px solid var(--panel-separator-color);
-}
-
-#identity-popup-securityView,
-#identity-popup-security-content,
-#identity-popup-permissions-content,
-#tracking-protection-content {
-  background-repeat: no-repeat;
-  background-position: 1em 1em;
-  background-size: 24px auto;
-}
-
-#identity-popup-security-content,
-#identity-popup-permissions-content,
-#tracking-protection-content {
-  padding: 0.5em 0 1em;
-  /* .identity-popup-headline.host depends on this width */
-  padding-inline-start: calc(2em + 24px);
-  padding-inline-end: 1em;
-}
-
-#identity-popup-securityView:-moz-locale-dir(rtl),
-#identity-popup-security-content:-moz-locale-dir(rtl),
-#identity-popup-permissions-content:-moz-locale-dir(rtl),
-#tracking-protection-content:-moz-locale-dir(rtl) {
-  background-position: calc(100% - 1em) 1em;
-}
-
-/* EXPAND BUTTON */
-
-.identity-popup-expander {
-  margin: 0;
-  padding: 4px 0;
-  min-width: auto;
-  width: var(--identity-popup-expander-width);
-  border: 0 none;
-  -moz-appearance: none;
-  background: url("chrome://browser/skin/controlcenter/arrow-subview.svg") center no-repeat;
-  background-size: 16px, auto;
-}
-
-.identity-popup-expander:-moz-locale-dir(rtl) {
-  transform: scaleX(-1);
-}
-
-.identity-popup-expander[panel-multiview-anchor] {
-  transition: background-color 250ms ease-in;
-  background-color: Highlight;
-  background-image: url("chrome://browser/skin/controlcenter/arrow-subview-back.svg"),
-                    linear-gradient(rgba(255,255,255,0.3), transparent);
-}
-
-.identity-popup-expander > .button-box {
-  padding: 0;
-  -moz-appearance: none;
-  border-style: none;
-  border-left: 1px solid var(--panel-separator-color);
-}
-
-.identity-popup-expander:-moz-focusring > .button-box,
-.identity-popup-expander[panel-multiview-anchor] > .button-box {
-  border-style: none;
-}
-
-.identity-popup-expander:hover {
-  background-color: var(--arrowpanel-dimmed);
-  background-image: url("chrome://browser/skin/controlcenter/arrow-subview.svg"),
-                    linear-gradient(rgba(255,255,255,0.3), transparent);
-}
-
-.identity-popup-expander:hover:active {
-  background-color: var(--arrowpanel-dimmed-further);
-  box-shadow: 0 1px 0 hsla(210,4%,10%,.05) inset;
-}
-
-/* CONTENT */
-
-.identity-popup-permission-label,
-.identity-popup-permission-state-label,
-#identity-popup-security-content > description,
-#identity-popup-security-descriptions > description,
-#identity-popup-securityView-header > description,
-#identity-popup-securityView-body > description,
-#identity-popup-permissions-content > description,
-#tracking-protection-content > label {
-  white-space: pre-wrap;
-  font-size: 110%;
-  margin: 0;
-}
-
-.identity-popup-headline {
-  margin: 3px 0 4px;
-  font-size: 150%;
-}
-
-.identity-popup-headline.host {
-  word-wrap: break-word;
-  /* 1em + 2em + 24px is #identity-popup-security-content padding
-   * 30em is .panel-mainview:not([panelid="PanelUI-popup"]) width */
-  max-width: calc(30rem - 3rem - 24px - var(--identity-popup-expander-width))
-}
-
-.identity-popup-warning-gray {
-  padding-inline-start: 24px;
-  background: url(chrome://browser/skin/controlcenter/warning-gray.svg) no-repeat 0 50%;
-}
-
-.identity-popup-warning-yellow {
-  padding-inline-start: 24px;
-  background: url(chrome://browser/skin/controlcenter/warning-yellow.svg) no-repeat 0 50%;
-}
-
-.identity-popup-warning-gray:-moz-locale-dir(rtl),
-.identity-popup-warning-yellow:-moz-locale-dir(rtl) {
-  background-position: 100% 50%;
-}
-
-/* SECURITY */
-
-.identity-popup-connection-secure {
-  color: #418220;
-}
-
-.identity-popup-connection-not-secure {
-  color: #d74345;
-}
-
-#identity-popup-securityView {
-  overflow: hidden;
-}
-
-#identity-popup-securityView,
-#identity-popup-security-content {
-  background-image: url(chrome://browser/skin/controlcenter/conn-not-secure.svg);
-}
-
-#identity-popup[connection=chrome] #identity-popup-securityView,
-#identity-popup[connection=chrome] #identity-popup-security-content {
-  background-image: url(chrome://branding/content/icon48.png);
-}
-
-#identity-popup[connection^=secure] #identity-popup-securityView,
-#identity-popup[connection^=secure] #identity-popup-security-content {
-  background-image: url(chrome://browser/skin/controlcenter/connection.svg#connection-secure);
-}
-
-/* Use [isbroken] to make sure we don't show a lock on an http page. See Bug 1192162. */
-#identity-popup[ciphers=weak] #identity-popup-securityView,
-#identity-popup[ciphers=weak] #identity-popup-security-content,
-#identity-popup[mixedcontent~=passive-loaded][isbroken] #identity-popup-securityView,
-#identity-popup[mixedcontent~=passive-loaded][isbroken] #identity-popup-security-content {
-  background-image: url(chrome://browser/skin/controlcenter/connection.svg#connection-degraded);
-}
-
-#identity-popup[connection=secure-cert-user-overridden] #identity-popup-securityView,
-#identity-popup[connection=secure-cert-user-overridden] #identity-popup-security-content {
-  background-image: url(chrome://browser/skin/connection-mixed-passive-loaded.svg#icon);
-}
-
-#identity-popup[loginforms=insecure] #identity-popup-securityView,
-#identity-popup[loginforms=insecure] #identity-popup-security-content,
-#identity-popup[mixedcontent~=active-loaded][isbroken] #identity-popup-securityView,
-#identity-popup[mixedcontent~=active-loaded][isbroken] #identity-popup-security-content {
-  background-image: url(chrome://browser/skin/controlcenter/mcb-disabled.svg);
-}
-
-#identity-popup-security-descriptions > description {
-  margin-top: 6px;
-  color: Graytext;
-}
-
-#identity-popup-securityView-header,
-#identity-popup-securityView-body {
-  margin-inline-start: calc(2em + 24px);
-  margin-inline-end: 1em;
-}
-
-#identity-popup-securityView-header {
-  margin-top: 0.5em;
-  border-bottom: 1px solid var(--panel-separator-color);
-  padding-bottom: 1em;
-}
-
-#identity-popup-securityView-body {
-  padding-inline-end: 1em;
-}
-
-#identity-popup-securityView-footer {
-  margin-top: 1em;
-  background-color: var(--arrowpanel-dimmed);
-}
-
-#identity-popup-securityView-footer > button {
-  -moz-appearance: none;
-  margin: 0;
-  border: none;
-  border-top: 1px solid var(--panel-separator-color);
-  padding: 8px 20px;
-  color: inherit;
-  background-color: transparent;
-}
-
-#identity-popup-securityView-footer > button:hover,
-#identity-popup-securityView-footer > button:focus {
-  background-color: var(--arrowpanel-dimmed);
-}
-
-#identity-popup-securityView-footer > button:hover:active {
-  background-color: var(--arrowpanel-dimmed-further);
-}
-
-#identity-popup-content-verifier ~ description {
-  margin-top: 1em;
-  color: Graytext;
-}
-
-description#identity-popup-content-verified-by,
-description#identity-popup-content-owner,
-description#identity-popup-content-verifier,
-#identity-popup-securityView-body > button {
-  margin-top: 1em;
-}
-
-#identity-popup-securityView-body > button {
-  margin-inline-start: 0;
-  margin-inline-end: 0;
-}
-
-/* TRACKING PROTECTION */
-
-#tracking-protection-content {
-  background-image: url("chrome://browser/skin/controlcenter/tracking-protection.svg#enabled");
-}
-
-#tracking-protection-content[state="loaded-tracking-content"]  {
-  background-image: url("chrome://browser/skin/controlcenter/tracking-protection.svg#disabled");
-}
-
-#tracking-action-block,
-#tracking-action-unblock,
-#tracking-action-unblock-private {
-  margin: 1em 0 0;
-}
-
-#tracking-protection-content[state] > #tracking-not-detected,
-#tracking-protection-content:not([state="blocked-tracking-content"]) > #tracking-blocked,
-#main-window[privatebrowsingmode] #tracking-action-unblock,
-#main-window:not([privatebrowsingmode]) #tracking-action-unblock-private,
-#tracking-protection-content:not([state="blocked-tracking-content"]) #tracking-action-unblock,
-#tracking-protection-content:not([state="blocked-tracking-content"]) #tracking-action-unblock-private,
-#tracking-protection-content:not([state="loaded-tracking-content"]) > #tracking-loaded,
-#tracking-protection-content:not([state="loaded-tracking-content"]) #tracking-action-block,
-#tracking-protection-content:not([state]) > #tracking-actions {
-  display: none;
-}
-
-/* PERMISSIONS */
-
-#identity-popup-permissions-content {
-  background-image: url(chrome://browser/skin/controlcenter/permissions.svg);
-}
-
-#identity-popup-permissions-headline {
-  /* Make sure the label is as tall as the icon so that the permission list
-     which is aligned with the icon doesn't cover it up. */
-  min-height: 24px;
-}
-
-#identity-popup-permission-list {
-  /* Offset the padding set on #identity-popup-permissions-content so that it
-     shows up just below the section. The permission icons are 16px wide and
-     should be right aligned with the section icon. */
-  margin-inline-start: calc(-1em - 16px);
-}
-
-.identity-popup-permission-item {
-  min-height: 24px;
-}
-
-#identity-popup-permission-list:not(:empty) {
-  margin-top: 5px;
-}
-
-.identity-popup-permission-icon {
-  width: 16px;
-  height: 16px;
-}
-
-.identity-popup-permission-icon.in-use {
-  animation: 1.5s ease in-use-blink infinite;
-}
-
-@keyframes in-use-blink {
-  50% { opacity: 0; }
-}
-
-.identity-popup-permission-label,
-.identity-popup-permission-state-label {
-  /* We need to align the action buttons and permission icons with the text.
-     This is tricky because the icon height is defined in pixels, while the
-     font height can vary with platform and system settings, and at least on
-     Windows the default font metrics reserve more extra space for accents.
-     This value is a good compromise for different platforms and font sizes. */
-  margin-top: -0.1em;
-}
-
-.identity-popup-permission-label {
-  margin-inline-start: 1em;
-}
-
-.identity-popup-permission-state-label {
-  margin-inline-end: 5px;
-  text-align: end;
-  color: graytext;
-}
-
-.identity-popup-permission-remove-button {
-  -moz-appearance: none;
-  margin: 0;
-  border-width: 0;
-  border-radius: 50%;
-  min-width: 0;
-  padding: 2px;
-  background-color: transparent;
-}
-
-.identity-popup-permission-remove-button > .button-box {
-  padding: 0;
-  -moz-appearance: none;
-}
-
-.identity-popup-permission-remove-button > .button-box > .button-icon {
-  margin: 0;
-  width: 16px;
-  height: 16px;
-  list-style-image: url(chrome://browser/skin/panel-icons.svg#cancel);
-  filter: url(chrome://browser/skin/filters.svg#fill);
-  fill: graytext;
-}
-
-.identity-popup-permission-remove-button > .button-box > .button-text {
-  display: none;
-}
-
-/* swap foreground / background colors on hover */
-.identity-popup-permission-remove-button:not(:-moz-focusring):hover {
-  background-color: graytext;
-}
-
-.identity-popup-permission-remove-button:not(:-moz-focusring):hover > .button-box > .button-icon {
-  fill: -moz-field;
-}
-
-.identity-popup-permission-remove-button:not(:-moz-focusring):hover:active {
-  background-color: -moz-fieldtext;
-}
diff --git a/browser/themes/shared/controlcenter/permissions.svg b/browser/themes/shared/controlcenter/permissions.svg
deleted file mode 100644
index 77f0f3e50..000000000
--- a/browser/themes/shared/controlcenter/permissions.svg
+++ /dev/null
@@ -1,20 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!-- This Source Code Form is subject to the terms of the Mozilla Public
-   - License, v. 2.0. If a copy of the MPL was not distributed with this
-   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
-<svg xmlns="http://www.w3.org/2000/svg"
-     width="24" height="24" viewBox="0 0 24 24">
-#include ../icon-colors.inc.svg
-
-  <defs>
-    <mask id="mask-permissions">
-      <path fill="#fff" d="M2,1h20c1.1,0,2,0.9,2,2v18c0,1.1-0.9,2-2,2H2c-1.1,0-2-0.9-2-2V3 C0,1.9,0.9,1,2,1z"/>
-      <path fill="#000" d="M12,3h9c0.6,0,1,0.4,1,1v16c0,0.6-0.4,1-1,1h-9V3z"/>
-      <path fill="#000" d="M5.5,12.5l2.7-3.7C8.4,8.5,8.8,8.5,9,8.7l0.7,0.5 c0.2,0.2,0.2,0.5,0,0.7L5.8,15c-0.2,0.2-0.5,0.3-0.8,0.1l-2.2-2.2c-0.2-0.2-0.2-0.5,0-0.7l0.8-0.8c0.2-0.2,0.5-0.2,0.7,0L5.5,12.5z" />
-      <rect x="16.3" y="8.5" transform="matrix(0.7071 -0.7071 0.7071 0.7071 -3.5061 15.5355)" fill="#fff" width="1.4" height="7.1"/>
-      <rect x="16.3" y="8.5" transform="matrix(-0.7071 -0.7071 0.7071 -0.7071 20.5355 32.5061)" fill="#fff" width="1.4" height="7.1"/>
-    </mask>
-  </defs>
-
-  <rect class="fieldtext" id="permissions" width="24" height="24" mask="url(#mask-permissions)"/>
-</svg>
diff --git a/browser/themes/shared/controlcenter/tracking-protection.svg b/browser/themes/shared/controlcenter/tracking-protection.svg
deleted file mode 100644
index 1779378c1..000000000
--- a/browser/themes/shared/controlcenter/tracking-protection.svg
+++ /dev/null
@@ -1,43 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!-- This Source Code Form is subject to the terms of the Mozilla Public
-   - License, v. 2.0. If a copy of the MPL was not distributed with this
-   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
-<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"
-     width="24" height="24" viewBox="0 0 24 24">
-#include ../icon-colors.inc.svg
-  <style>
-    g:not(:target) {
-      display: none;
-    }
-  </style>
-
-  <defs>
-    <path id="shape-shield-outer" d="M12,1L3.4,2.4C2.6,2.5,2,3.1,2,3.9c0,1.9,0,5.2,0.2,6.6c0.4,4.2,1.3,6.3,3.2,8.8C8,22.6,12,23,12,23s4-0.4,6.6-3.7 c1.9-2.4,2.8-4.5,3.2-8.8C22,9.1,22,5.7,22,3.9c0-0.8-0.6-1.4-1.4-1.5L12,1L12,1z"/>
-    <path id="shape-shield-inner" d="M12,3l7.9,1.2c0.1,0,0.1,0,0.1,0.1c0,2.9,0,5.2-0.1,6.1c-0.4,4-1.2,5.6-2.8,7.6c-1.8,2.3-4.4,2.8-5.1,3 c-0.7-0.1-3.3-0.7-5.1-3c-1.6-1.9-2.4-3.6-2.8-7.6C4,9.5,4,7.3,4,4.3c0,0,0-0.1,0.1-0.1L12,3"/>
-    <path id="shape-shield-detail" d="M12,20c-0.8-0.2-2.9-0.7-4.4-2.6c-1.4-1.8-2.1-3.2-2.5-7C5,9.6,5,7.7,5,5.1L12,4 V20z"/>
-
-    <mask id="mask-shield-cutout">
-      <rect width="24" height="24" fill="#000"/>
-      <use xlink:href="#shape-shield-outer" fill="#fff"/>
-      <use xlink:href="#shape-shield-inner" fill="#000"/>
-      <use xlink:href="#shape-shield-detail" fill="#fff"/>
-    </mask>
-
-    <mask id="mask-shield-cutout-disabled">
-      <rect width="24" height="24" fill="#000"/>
-      <use xlink:href="#shape-shield-outer" fill="#fff"/>
-      <use xlink:href="#shape-shield-inner" fill="#000"/>
-      <use xlink:href="#shape-shield-detail" fill="#fff"/>
-      <line x1="3" y1="24" x2="23" y2="3" stroke="#000" stroke-width="3"/>
-    </mask>
-  </defs>
-
-  <g id="enabled">
-    <use class="fieldtext" xlink:href="#shape-shield-outer" mask="url(#mask-shield-cutout)"/>
-  </g>
-
-  <g id="disabled">
-    <use class="fieldtext" xlink:href="#shape-shield-outer" mask="url(#mask-shield-cutout-disabled)"/>
-    <line x1="3" y1="22" x2="23" y2="1" stroke="#d92d21" stroke-width="3"/>
-  </g>
-</svg>
diff --git a/browser/themes/shared/controlcenter/warning-gray.svg b/browser/themes/shared/controlcenter/warning-gray.svg
deleted file mode 100644
index 5f122c3ee..000000000
--- a/browser/themes/shared/controlcenter/warning-gray.svg
+++ /dev/null
@@ -1,9 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!-- This Source Code Form is subject to the terms of the Mozilla Public
-   - License, v. 2.0. If a copy of the MPL was not distributed with this
-   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
-<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"
-     width="16" height="16" viewBox="0 0 16 16">
-  <path fill="#808080" d="M14.8,12.5L9.3,1.9C9,1.3,8.5,1,8,1C7.5,1,7,1.3,6.7,1.9L1.2,12.5c-0.3,0.6-0.3,1.2,0,1.7C1.5,14.7,2,15,2.6,15h10.8 c0.6,0,1.1-0.3,1.4-0.8C15.1,13.7,15.1,13.1,14.8,12.5z"/>
-  <path fill="#fff" d="M8,11c-0.8,0-1.5,0.7-1.5,1.5C6.5,13.3,7.2,14,8,14 c0.8,0,1.5-0.7,1.5-1.5C9.5,11.7,8.8,11,8,11z M8,10L8,10C8.6,10,9,9.6,9,9l0.2-4.2c0-0.7-0.5-1.2-1.2-1.2S6.8,4.1,6.8,4.8L7,9 C7,9.6,7.4,10,8,10z"/>
-</svg>
diff --git a/browser/themes/shared/controlcenter/warning-yellow.svg b/browser/themes/shared/controlcenter/warning-yellow.svg
deleted file mode 100644
index e2d3a3664..000000000
--- a/browser/themes/shared/controlcenter/warning-yellow.svg
+++ /dev/null
@@ -1,9 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!-- This Source Code Form is subject to the terms of the Mozilla Public
-   - License, v. 2.0. If a copy of the MPL was not distributed with this
-   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
-<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"
-     width="16" height="16" viewBox="0 0 16 16">
-  <path fill="#ffbf00" d="M14.8,12.5L9.3,1.9C9,1.3,8.5,1,8,1C7.5,1,7,1.3,6.7,1.9L1.2,12.5c-0.3,0.6-0.3,1.2,0,1.7C1.5,14.7,2,15,2.6,15h10.8 c0.6,0,1.1-0.3,1.4-0.8C15.1,13.7,15.1,13.1,14.8,12.5z"/>
-  <path fill="#fff" d="M8,11c-0.8,0-1.5,0.7-1.5,1.5C6.5,13.3,7.2,14,8,14 c0.8,0,1.5-0.7,1.5-1.5C9.5,11.7,8.8,11,8,11z M8,10L8,10C8.6,10,9,9.6,9,9l0.2-4.2c0-0.7-0.5-1.2-1.2-1.2S6.8,4.1,6.8,4.8L7,9 C7,9.6,7.4,10,8,10z"/>
-</svg>
diff --git a/browser/themes/shared/ctrlTab.inc.css b/browser/themes/shared/ctrlTab.inc.css
deleted file mode 100644
index 1205d0499..000000000
--- a/browser/themes/shared/ctrlTab.inc.css
+++ /dev/null
@@ -1,63 +0,0 @@
-%if 0
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-%endif
-
-/* Ctrl-Tab */
-
-#ctrlTab-panel {
-  -moz-appearance: none;
-%ifdef XP_MACOSX
-  -moz-window-shadow: none;
-%endif
-  background: hsla(0,0%,33%,.85);
-  color: white;
-  border-style: none;
-  padding: 20px 10px 10px;
-%ifndef XP_MACOSX
-  font-weight: bold;
-%endif
-  text-shadow: 0 0 1px hsl(0,0%,12%), 0 0 2px hsl(0,0%,12%);
-}
-
-.ctrlTab-favicon[src] {
-  background-color: white;
-  width: 20px;
-  height: 20px;
-  padding: 2px;
-}
-
-.ctrlTab-preview-inner > .tabPreview-canvas {
-  box-shadow: 1px 1px 2px hsl(0,0%,12%);
-}
-
-.ctrlTab-preview:not(#ctrlTab-showAll) > * > .ctrlTab-preview-inner > .tabPreview-canvas {
-  margin-bottom: 2px;
-}
-
-.ctrlTab-preview-inner {
-  padding: 8px;
-  border: 2px solid transparent;
-  border-radius: .5em;
-}
-
-.ctrlTab-preview:not(#ctrlTab-showAll) > * > .ctrlTab-preview-inner {
-  margin: -10px -10px 0;
-}
-
-#ctrlTab-showAll:not(:focus) > * > .ctrlTab-preview-inner {
-  background-color: rgba(255,255,255,.2);
-}
-
-.ctrlTab-preview:focus > * > .ctrlTab-preview-inner {
-  color: white;
-  background-color: rgba(0,0,0,.6);
-  text-shadow: none;
-  border-color: white;
-}
-
-#ctrlTab-showAll {
-  margin-top: .5em;
-}
-
diff --git a/browser/themes/shared/customizableui/customize-illustration-rtl.png b/browser/themes/shared/customizableui/customize-illustration-rtl.png
deleted file mode 100644
index 12005095c..000000000
--- a/browser/themes/shared/customizableui/customize-illustration-rtl.png
+++ /dev/null
diff --git a/browser/themes/shared/customizableui/customize-illustration-rtl@2x.png b/browser/themes/shared/customizableui/customize-illustration-rtl@2x.png
deleted file mode 100644
index c1af12990..000000000
--- a/browser/themes/shared/customizableui/customize-illustration-rtl@2x.png
+++ /dev/null
diff --git a/browser/themes/shared/customizableui/customize-illustration.png b/browser/themes/shared/customizableui/customize-illustration.png
deleted file mode 100644
index 9131951b0..000000000
--- a/browser/themes/shared/customizableui/customize-illustration.png
+++ /dev/null
diff --git a/browser/themes/shared/customizableui/customize-illustration@2x.png b/browser/themes/shared/customizableui/customize-illustration@2x.png
deleted file mode 100644
index 50c0d1949..000000000
--- a/browser/themes/shared/customizableui/customize-illustration@2x.png
+++ /dev/null
diff --git a/browser/themes/shared/customizableui/customizeFavicon.ico b/browser/themes/shared/customizableui/customizeFavicon.ico
deleted file mode 100644
index c7bd84339..000000000
--- a/browser/themes/shared/customizableui/customizeFavicon.ico
+++ /dev/null
diff --git a/browser/themes/shared/customizableui/customizeMode.inc.css b/browser/themes/shared/customizableui/customizeMode.inc.css
deleted file mode 100644
index d99933388..000000000
--- a/browser/themes/shared/customizableui/customizeMode.inc.css
+++ /dev/null
@@ -1,459 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-/* Customization mode */
-
-:root {
-  --drag-drop-transition-duration: .3s;
-}
-
-#main-window:-moz-any([customize-entering],[customize-entered]) #browser-bottombox {
-  margin-bottom: 2em;
-}
-
-#main-window:-moz-any([customize-entering],[customize-entered]) #content-deck,
-#main-window:-moz-any([customize-entering],[customize-entered]) #browser-bottombox,
-#main-window:-moz-any([customize-entering],[customize-entered]) #navigator-toolbox {
-  margin-left: 2em;
-  margin-right: 2em;
-}
-
-#main-window:-moz-any([customize-entering],[customize-exiting]) #tab-view-deck {
-  pointer-events: none;
-}
-
-#main-window[customize-entered] .customization-target:not(:-moz-any(#PanelUI-contents, #TabsToolbar, #toolbar-menubar))::before,
-#PanelUI-contents > .panel-customization-placeholder {
-  -moz-outline-radius: 2.5px;
-  outline: 1px dashed transparent;
-}
-
-#main-window[customize-entered] .customization-target:not(:-moz-any(#PanelUI-contents, #TabsToolbar, #toolbar-menubar))::before {
-  /* Prevent jumping of tabs when switching a window between inactive and active (bug 853415). */
-  -moz-box-ordinal-group: 0;
-  content: "";
-  display: -moz-box;
-  height: 100%;
-  left: 0;
-  outline-offset: -2px;
-  pointer-events: none;
-  position: absolute;
-  top: 0;
-  width: 100%;
-}
-
-/* Shift the TabsToolbar outline up 2px since the #nav-bar is shifted up by 1px and the
-   #TabsToolbar::after is a pixel higher to draw the bottom border of the tabstrip so this makes the
-   offset from the bottom effectively the same as other targets (-2px). */
-#main-window[customize-entered] #TabsToolbar.customization-target::before {
-  top: -2px;
-}
-
-/* The parents of the outline pseudo-elements need to be positioned so that the outline is positioned relative to it. */
-#main-window[customize-entered] .customization-target:not(:-moz-any(#PanelUI-contents, #TabsToolbar, #toolbar-menubar)):hover,
-#main-window[customize-entered] .customization-target[customizing-dragovertarget]:not(:-moz-any(#PanelUI-contents, #TabsToolbar, #toolbar-menubar)),
-#main-window[customize-entered] #nav-bar-customization-target.customization-target {
-  position: relative;
-}
-
-/* Most target outlines are shown on hover and drag over but the panel menu uses
-   placeholders instead. */
-#main-window[customize-entered] .customization-target:not(:-moz-any(#PanelUI-contents, #TabsToolbar, #toolbar-menubar)):hover::before,
-#main-window[customize-entered] .customization-target[customizing-dragovertarget]:not(:-moz-any(#PanelUI-contents, #TabsToolbar, #toolbar-menubar))::before,
-/* nav-bar and panel outlines are always shown */
-#nav-bar[showoutline=true] > #nav-bar-customization-target.customization-target::before {
-  outline-color: currentColor;
-}
-
-#nav-bar[showoutline=true] > #nav-bar-customization-target.customization-target::before {
-  transition: outline-color 250ms linear;
-}
-
-#PanelUI-contents[showoutline=true] > .panel-customization-placeholder {
-  transition: outline-color 250ms linear;
-  outline-color: var(--panel-separator-color);
-}
-
-#PanelUI-contents > .panel-customization-placeholder {
-  cursor: auto;
-  outline-offset: -5px;
-}
-
-#main-window[customizing] .customization-target:not(#PanelUI-contents) {
-  min-width: 100px;
-  padding-left: 10px;
-  padding-right: 10px;
-}
-
-#customization-container {
-  background-color: -moz-field;
-  color: -moz-fieldText;
-  text-shadow: none;
-}
-
-#customization-palette,
-#customization-empty {
-  padding: 5px 25px 25px;
-}
-
-#customization-header {
-  font-size: 1.75em;
-  line-height: 1.75em;
-  color: GrayText;
-  font-weight: 200;
-  margin: 25px 25px 12px;
-  padding-bottom: 12px;
-  border-bottom: 1px solid ThreeDLightShadow;
-}
-
-#customization-panel-container {
-  padding: 15px 25px 25px;
-  background-image: linear-gradient(to bottom, #3e86ce, #3878ba);
-}
-
-#main-window:-moz-any([customize-entering],[customize-entered]) #browser-bottombox,
-#customization-footer {
-  background-color: -moz-dialog;
-}
-
-#customization-footer {
-  border-top: 1px solid ThreeDLightShadow;
-  padding: 10px;
-}
-
-%if defined(XP_MACOSX) || defined(XP_WIN)
-%ifdef XP_WIN
-@media (-moz-windows-default-theme) {
-%endif
-
-.customizationmode-button {
-  border: 1px solid rgb(192,192,192);
-  border-radius: 3px;
-  margin: 5px;
-  padding: 2px 10px;
-  background-color: rgb(251,251,251);
-  color: rgb(71,71,71);
-  box-shadow: 0 1px rgba(255, 255, 255, 0.5),
-              inset 0 1px rgba(255, 255, 255, 0.5);
-  -moz-appearance: none;
-}
-
-.customizationmode-button > .box-inherit {
-  border-width: 0;
-  padding-inline-start: 0;
-  padding-inline-end: 0;
-}
-
-.customizationmode-button > .button-icon {
-  margin-inline-start: 0;
-}
-
-.customizationmode-button:not([type=menu]) > .button-text {
-  margin-inline-end: 0;
-}
-
-.customizationmode-button > .button-menu-dropmarker {
-  margin-inline-end: 0;
-  padding-inline-end: 0;
-}
-
-.customizationmode-button:hover:active:not([disabled]),
-.customizationmode-button[open],
-.customizationmode-button[checked] {
-  background-color: rgb(218, 218, 218);
-  border-color: rgb(168, 168, 168);
-  text-shadow: 0 1px rgb(236, 236, 236);
-  box-shadow: 0 1px rgba(255, 255, 255, 0.5),
-              inset 0 1px rgb(196, 196, 196);
-}
-
-.customizationmode-button[disabled="true"] {
-  opacity: .5;
-}
-
-%ifdef XP_WIN
-} /* @media (-moz-windows-default-theme) */
-%endif
-%endif /* defined(XP_MACOSX) || defined(XP_WIN) */
-
-.customizationmode-button > .box-inherit > .box-inherit > .button-icon,
-.customizationmode-button > .button-box > .button-icon {
-  height: 24px;
-}
-
-%ifdef CAN_DRAW_IN_TITLEBAR
-#customization-titlebar-visibility-button > .button-box > .button-text,
-%endif
-#customization-lwtheme-button > .box-inherit > .box-inherit > .button-text {
-  /* Sadly, button.css thinks its margins are perfect for everyone. */
-  margin-inline-start: 6px !important;
-}
-
-#customization-lwtheme-button > .box-inherit > .box-inherit > .button-icon {
-  width: 20px;
-  height: 20px;
-  border-radius: 2px;
-  background-image: url("chrome://browser/skin/theme-switcher-icon.png");
-  background-size: contain;
-}
-
-%ifdef CAN_DRAW_IN_TITLEBAR
-#customization-titlebar-visibility-button {
-  list-style-image: url("chrome://browser/skin/customizableui/customize-titleBar-toggle.png");
-  -moz-image-region: rect(0, 24px, 24px, 0);
-}
-
-#customization-titlebar-visibility-button > .button-box > .button-icon {
-  vertical-align: middle;
-}
-
-#customization-titlebar-visibility-button[checked] {
-  -moz-image-region: rect(0, 48px, 24px, 24px);
-}
-
-@media (min-resolution: 1.1dppx) {
-  #customization-titlebar-visibility-button {
-    list-style-image: url("chrome://browser/skin/customizableui/customize-titleBar-toggle@2x.png");
-    -moz-image-region: rect(0, 48px, 48px, 0);
-  }
-
-  #customization-titlebar-visibility-button[checked] {
-    -moz-image-region: rect(0, 96px, 48px, 48px);
-  }
-}
-%endif /* CAN_DRAW_IN_TITLEBAR */
-
-#main-window[customize-entered] #customization-panel-container {
-  background-image: url("chrome://browser/skin/customizableui/customizeMode-separatorHorizontal.png"),
-                    url("chrome://browser/skin/customizableui/customizeMode-separatorVertical.png"),
-                    url("chrome://browser/skin/customizableui/customizeMode-gridTexture.png"),
-                    url("chrome://browser/skin/customizableui/background-noise-toolbar.png"),
-                    linear-gradient(to bottom, #3e86ce, #3878ba);
-  background-position: center top, left center, left top, left top, left top;
-  background-repeat: no-repeat, no-repeat, repeat, repeat, no-repeat;
-  background-size: auto 12px, 12px 100%, auto, auto, auto;
-  background-attachment: scroll, scroll, fixed, fixed, scroll;
-}
-
-toolbarpaletteitem[place="toolbar"] {
-  transition: border-width 250ms ease-in-out;
-}
-
-toolbarpaletteitem[mousedown] {
-  cursor: -moz-grabbing;
-}
-
-.panel-customization-placeholder,
-toolbarpaletteitem[place="palette"],
-toolbarpaletteitem[place="panel"] {
-  transition: transform var(--drag-drop-transition-duration) ease-in-out;
-}
-
-#customization-palette {
-  transition: opacity .3s ease-in-out;
-  opacity: 0;
-}
-
-#customization-palette[showing="true"] {
-  opacity: 1;
-}
-
-toolbarpaletteitem toolbarbutton[disabled] {
-  color: inherit !important;
-}
-
-toolbarpaletteitem[notransition].panel-customization-placeholder,
-toolbarpaletteitem[notransition][place="toolbar"],
-toolbarpaletteitem[notransition][place="palette"],
-toolbarpaletteitem[notransition][place="panel"] {
-  transition: none;
-}
-
-toolbarpaletteitem > toolbarbutton > .toolbarbutton-icon,
-toolbarpaletteitem > toolbarbutton > .toolbarbutton-badge-stack > .toolbarbutton-icon,
-toolbarpaletteitem > toolbaritem.panel-wide-item,
-toolbarpaletteitem > toolbarbutton[type="menu-button"] {
-  transition: transform var(--drag-drop-transition-duration) cubic-bezier(.6, 2, .75, 1.5) !important;
-}
-
-toolbarpaletteitem[mousedown] > toolbarbutton > .toolbarbutton-icon,
-toolbarpaletteitem[mousedown] > toolbarbutton > .toolbarbutton-badge-stack > .toolbarbutton-icon {
-  transform: scale(1.3);
-}
-
-toolbarpaletteitem[mousedown] > toolbaritem.panel-wide-item,
-toolbarpaletteitem[mousedown] > toolbarbutton[type="menu-button"] {
-  transform: scale(1.1);
-}
-
-/* Override the toolkit styling for items being dragged over. */
-toolbarpaletteitem[place="toolbar"] {
-  border-left-width: 0;
-  border-right-width: 0;
-  margin-right: 0;
-  margin-left: 0;
-}
-
-#customization-palette:not([hidden]) {
-  margin-bottom: 25px;
-}
-
-toolbarpaletteitem[place="palette"]:-moz-focusring,
-toolbarpaletteitem[place="panel"]:-moz-focusring,
-toolbarpaletteitem[place="toolbar"]:-moz-focusring {
-  outline-width: 0;
-}
-
-toolbarpaletteitem[place="palette"]:not([mousedown="true"]):-moz-focusring,
-toolbarpaletteitem[place="panel"]:not([mousedown="true"]):-moz-focusring,
-toolbarpaletteitem[place="toolbar"]:not([mousedown="true"]):-moz-focusring {
-  /* Delay adding the focusring back until after the transform transition completes. */
-  transition: outline-width .01s linear var(--drag-drop-transition-duration);
-  outline: 1px dotted;
-  -moz-outline-radius: 2.5px;
-}
-
-toolbarpaletteitem[place="toolbar"]:not([mousedown="true"]):-moz-focusring {
-  outline-offset: -5px;
-}
-
-#wrapper-edit-controls[place="palette"] > #edit-controls > toolbarbutton,
-#wrapper-edit-controls[place="palette"] > #edit-controls > separator,
-#wrapper-zoom-controls[place="palette"] > #zoom-controls > toolbarbutton,
-#wrapper-zoom-controls[place="palette"] > #zoom-controls > separator {
-  margin-top: 20px;
-}
-
-#wrapper-edit-controls[place="palette"] > #edit-controls > toolbarbutton,
-#wrapper-zoom-controls[place="palette"] > #zoom-controls > toolbarbutton {
-  margin-left: 0;
-  margin-right: 0;
-  max-width: 24px;
-  min-width: 24px;
-  max-height: 24px;
-  min-height: 24px;
-  padding: 4px;
-}
-
-#wrapper-edit-controls[place="palette"] > #edit-controls > toolbarbutton > .toolbarbutton-icon,
-#wrapper-zoom-controls[place="palette"] > #zoom-controls > toolbarbutton > .toolbarbutton-icon {
-  width: 16px;
-}
-
-#wrapper-edit-controls > #edit-controls > toolbarbutton > .toolbarbutton-icon {
-  opacity: 1; /* To ensure these buttons always look enabled in customize mode */
-}
-
-#wrapper-zoom-controls[place="palette"] > #zoom-controls > #zoom-reset-button,
-#wrapper-zoom-controls[place="palette"] > #zoom-controls > #zoom-reset-button + separator {
-  display: none;
-}
-
-#wrapper-personal-bookmarks:not([place="toolbar"]) > #personal-bookmarks {
-  -moz-box-pack: center;
-  min-height: 48px;
-}
-
-#personal-bookmarks[cui-areatype="toolbar"]:not([overflowedItem=true]) > #bookmarks-toolbar-placeholder > .toolbarbutton-icon {
-  margin-inline-end: 5px;
-}
-
-#customization-palette > toolbarpaletteitem > label {
-  text-align: center;
-  margin-left: 0;
-  margin-right: 0;
-}
-
-#customization-lwtheme-menu > .panel-arrowcontainer > .panel-arrowcontent {
-  -moz-box-orient: vertical;
-  /* Make the panel padding uniform across all platforms due to the
-     styling of the section headers and footer. */
-  padding: 10px;
-}
-
-.customization-lwtheme-menu-theme > .toolbarbutton-icon {
-  width: 32px;
-  height: 32px;
-}
-
-.customization-lwtheme-menu-theme {
-  -moz-appearance: none;
-  border: 1px solid transparent;
-  margin: 0 -5px 5px;
-  padding-top: 0;
-  padding-inline-end: 5px;
-  padding-bottom: 0;
-  padding-inline-start: 0;
-}
-
-.customization-lwtheme-menu-theme[defaulttheme] {
-  list-style-image: url(chrome://browser/skin/theme-switcher-icon.png);
-}
-
-.customization-lwtheme-menu-theme[active="true"],
-.customization-lwtheme-menu-theme:hover {
-  background-color: var(--arrowpanel-dimmed);
-  border-color: var(--panel-separator-color);
-}
-
-.customization-lwtheme-menu-theme[active="true"],
-.customization-lwtheme-menu-theme:hover:active {
-  background-color: var(--arrowpanel-dimmed-further);
-}
-
-.customization-lwtheme-menu-theme > .toolbarbutton-icon {
-  margin: 5px;
-}
-
-.customization-lwtheme-menu-theme > .toolbarbutton-text {
-  text-align: start;
-}
-
-#customization-lwtheme-menu-header,
-#customization-lwtheme-menu-recommended {
-  padding: 10px;
-  margin-bottom: 5px;
-}
-
-#customization-lwtheme-menu-header,
-#customization-lwtheme-menu-recommended,
-#customization-lwtheme-menu-footer {
-  background-color: var(--arrowpanel-dimmed);
-  margin-right: -10px;
-  margin-left: -10px;
-}
-
-#customization-lwtheme-menu-header {
-  margin-top: -10px;
-  border-bottom: 1px solid var(--arrowpanel-dimmed);
-}
-
-#customization-lwtheme-menu-recommended {
-  border-top: 1px solid var(--arrowpanel-dimmed);
-  border-bottom: 1px solid var(--arrowpanel-dimmed);
-}
-
-#customization-lwtheme-menu-footer {
-  background: linear-gradient(var(--arrowpanel-dimmed) 60%, transparent) border-box;
-  border-top: 1px solid var(--arrowpanel-dimmed);
-  margin-bottom: -10px;
-}
-
-.customization-lwtheme-menu-footeritem {
-  -moz-appearance: none;
-  -moz-box-flex: 1;
-  color: inherit;
-  border-style: none;
-  padding: 10px;
-  margin-left: 0;
-  margin-right: 0;
-}
-
-.customization-lwtheme-menu-footeritem:hover {
-  background: linear-gradient(var(--arrowpanel-dimmed) 40%, transparent) padding-box;
-}
-
-.customization-lwtheme-menu-footeritem:first-child {
-  border-inline-end: 1px solid var(--panel-separator-color);
-}
diff --git a/browser/themes/shared/customizableui/info-icon-customizeTip.png b/browser/themes/shared/customizableui/info-icon-customizeTip.png
deleted file mode 100644
index 0dfbbce5d..000000000
--- a/browser/themes/shared/customizableui/info-icon-customizeTip.png
+++ /dev/null
diff --git a/browser/themes/shared/customizableui/info-icon-customizeTip@2x.png b/browser/themes/shared/customizableui/info-icon-customizeTip@2x.png
deleted file mode 100644
index 7a87fac20..000000000
--- a/browser/themes/shared/customizableui/info-icon-customizeTip@2x.png
+++ /dev/null
diff --git a/browser/themes/shared/customizableui/menuPanel-customizeFinish.png b/browser/themes/shared/customizableui/menuPanel-customizeFinish.png
deleted file mode 100644
index 07be6a76a..000000000
--- a/browser/themes/shared/customizableui/menuPanel-customizeFinish.png
+++ /dev/null
diff --git a/browser/themes/shared/customizableui/menuPanel-customizeFinish@2x.png b/browser/themes/shared/customizableui/menuPanel-customizeFinish@2x.png
deleted file mode 100644
index 7562e138c..000000000
--- a/browser/themes/shared/customizableui/menuPanel-customizeFinish@2x.png
+++ /dev/null
diff --git a/browser/themes/shared/customizableui/panelUI.inc.css b/browser/themes/shared/customizableui/panelUI.inc.css
deleted file mode 100644
index ba36da995..000000000
--- a/browser/themes/shared/customizableui/panelUI.inc.css
+++ /dev/null
@@ -1,1706 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-%filter substitution
-
-%define menuPanelWidth 22.35em
-%define standaloneSubviewWidth 30em
-% XXXgijs This is the ugliest bit of code I think I've ever written for Mozilla.
-% Basically, the 0.1px is there to avoid CSS rounding errors causing buttons to wrap.
-% For gory details, refer to https://bugzilla.mozilla.org/show_bug.cgi?id=963365#c11
-% There's no calc() here (and therefore lots of calc() where this is used) because
-% we don't support nested calc(): https://bugzilla.mozilla.org/show_bug.cgi?id=968761
-%define menuPanelButtonWidth (@menuPanelWidth@ / 3 - 0.1px)
-%define buttonStateHover :not(:-moz-any([disabled],[open],:active)):hover
-%define menuStateHover :not(:-moz-any([disabled],:active))[_moz-menuactive]
-%define buttonStateActive :not([disabled]):-moz-any([open],:hover:active)
-%define menuStateActive :not([disabled])[_moz-menuactive]:active
-%define menuStateMenuActive :not([disabled])[_moz-menuactive]
-
-%include ../browser.inc
-
-:root {
-  --panel-ui-exit-subview-gutter-width: 38px;
-}
-
-#PanelUI-popup #PanelUI-contents:empty {
-  height: 128px;
-}
-
-#PanelUI-button {
-  margin-inline-start: 2px;
-  border-inline-start: 1px solid;
-  border-image: linear-gradient(transparent, rgba(0,0,0,.1) 20%, rgba(0,0,0,.1) 80%, transparent);
-  border-image-slice: 1;
-}
-
-#nav-bar[brighttext] > #PanelUI-button {
-  border-image-source: linear-gradient(transparent, rgba(100%,100%,100%,.2) 20%, rgba(100%,100%,100%,.2) 80%, transparent);
-}
-
-#PanelUI-menu-button[badge-status] > .toolbarbutton-badge-stack > .toolbarbutton-badge {
-  display: -moz-box;
-  height: 10px;
-  width: 10px;
-  background-size: contain;
-  border: none;
-}
-
-#PanelUI-menu-button[badge-status="download-success"] > .toolbarbutton-badge-stack > .toolbarbutton-badge {
-  display: none;
-}
-
-#PanelUI-menu-button[badge-status="update-succeeded"] > .toolbarbutton-badge-stack > .toolbarbutton-badge {
-  background: #74BF43 url(chrome://browser/skin/update-badge.svg) no-repeat center;
-  height: 13px;
-}
-
-#PanelUI-menu-button[badge-status="update-failed"] > .toolbarbutton-badge-stack > .toolbarbutton-badge {
-  background: #D90000 url(chrome://browser/skin/update-badge-failed.svg) no-repeat center;
-  height: 13px;
-}
-
-#PanelUI-menu-button[badge-status="download-warning"] > .toolbarbutton-badge-stack > .toolbarbutton-badge,
-#PanelUI-menu-button[badge-status="fxa-needs-authentication"] > .toolbarbutton-badge-stack > .toolbarbutton-badge {
-  box-shadow: none;
-  filter: drop-shadow(0 1px 0 hsla(206, 50%, 10%, .15));
-}
-
-#PanelUI-menu-button[badge-status="download-warning"] > .toolbarbutton-badge-stack > .toolbarbutton-badge,
-#PanelUI-menu-button[badge-status="download-severe"] > .toolbarbutton-badge-stack > .toolbarbutton-badge {
-  width: 7px;
-  height: 7px;
-  min-width: 0;
-  border-radius: 50%;
-  /* "!important" is necessary to override the rule in toolbarbutton.css */
-  margin-top: -1px !important;
-  margin-right: -2px !important;
-}
-
-#PanelUI-menu-button[badge-status="download-warning"] > .toolbarbutton-badge-stack > .toolbarbutton-badge {
-  background: #FFBF00;
-}
-
-#PanelUI-menu-button[badge-status="download-severe"] > .toolbarbutton-badge-stack > .toolbarbutton-badge {
-  background: #D90000;
-}
-
-#PanelUI-menu-button[badge-status="fxa-needs-authentication"] > .toolbarbutton-badge-stack > .toolbarbutton-badge {
-  height: 13px;
-  background: transparent url(chrome://browser/skin/warning.svg) no-repeat center;
-}
-
-#PanelUI-menu-button[badge-status="download-warning"] > .toolbarbutton-badge-stack > .toolbarbutton-badge:-moz-window-inactive,
-#PanelUI-menu-button[badge-status="fxa-needs-authentication"] > .toolbarbutton-badge-stack > .toolbarbutton-badge:-moz-window-inactive {
-  filter: none;
-}
-
-.panel-subviews {
-  padding: 4px;
-  background-clip: padding-box;
-  border-left: 1px solid var(--arrowpanel-border-color);
-  box-shadow: 0 3px 5px hsla(210,4%,10%,.1),
-              0 0 7px hsla(210,4%,10%,.1);
-  margin-inline-start: var(--panel-ui-exit-subview-gutter-width);
-}
-
-.panel-viewstack[viewtype="main"] > .panel-subviews {
-  transform: translateX(@menuPanelWidth@);
-}
-
-.panel-viewstack[viewtype="main"] > .panel-subviews:-moz-locale-dir(rtl) {
-  transform: translateX(-@menuPanelWidth@);
-}
-
-panelmultiview[nosubviews=true] > .panel-viewcontainer > .panel-viewstack > .panel-subviews {
-  display: none;
-}
-
-.panel-viewstack:not([viewtype="main"]) > .panel-mainview > #PanelUI-mainView {
-  -moz-box-flex: 1;
-}
-
-.panel-subview-body {
-  overflow-y: auto;
-  overflow-x: hidden;
-  -moz-box-flex: 1;
-}
-
-#PanelUI-popup .panel-subview-body {
-  margin: -4px;
-  padding: 4px 4px;
-}
-
-.panel-subview-header,
-.subviewbutton.panel-subview-footer {
-  box-sizing: border-box;
-  min-height: 41px;
-  padding: 11px 12px;
-}
-
-.panel-subview-header {
-  margin: -4px -4px 4px;
-  border-bottom: 1px solid var(--panel-separator-color);
-  color: GrayText;
-  font-variant: small-caps;
-}
-
-.cui-widget-panelview .panel-subview-header {
-  display: none;
-}
-
-.cui-widget-panelview .subviewbutton.panel-subview-footer {
-  margin: 4px 0 0;
-  -moz-box-pack: center;
-}
-
-#PanelUI-mainView {
-  display: flex;
-  flex-direction: column;
-}
-
-#PanelUI-popup > arrowscrollbox > autorepeatbutton {
-  display: none;
-}
-#PanelUI-popup > arrowscrollbox > scrollbox {
-  overflow: visible;
-}
-
-#PanelUI-popup > .panel-arrowcontainer > .panel-arrowcontent {
-  overflow: hidden;
-}
-
-#PanelUI-popup > .panel-arrowcontainer > .panel-arrowcontent,
-.cui-widget-panel > .panel-arrowcontainer > .panel-arrowcontent > .popup-internal-box {
-  padding: 0;
-}
-
-.panelUI-grid .toolbarbutton-1 > .toolbarbutton-menubutton-button > .toolbarbutton-multiline-text,
-.panelUI-grid .toolbarbutton-1 > .toolbarbutton-multiline-text {
-  line-height: 1.2;
-  max-height: 2.4em;
-}
-
-.panelUI-grid .toolbarbutton-1:not([auto-hyphens="off"]) > .toolbarbutton-menubutton-button > .toolbarbutton-multiline-text,
-.panelUI-grid .toolbarbutton-1:not([auto-hyphens="off"]) > .toolbarbutton-multiline-text {
-  -moz-hyphens: auto;
-}
-
-.panelUI-grid:not([customize-transitioning]) .toolbarbutton-1 > .toolbarbutton-menubutton-button > .toolbarbutton-multiline-text,
-.panelUI-grid:not([customize-transitioning]) .toolbarbutton-1 > .toolbarbutton-multiline-text {
-  position: absolute;
-  clip: rect(-0.1em, auto, 2.6em, auto);
-}
-
-.panelUI-grid .toolbarbutton-1 > .toolbarbutton-text,
-.panelUI-grid .toolbarbutton-1 > .toolbarbutton-multiline-text {
-  text-align: center;
-  /* Need to override toolkit theming which sets margin: 0 !important; */
-  margin: 2px 0 0 !important;
-}
-
-.panelUI-grid .toolbarbutton-1 > .toolbarbutton-menubutton-button > .toolbarbutton-multiline-text {
-  text-align: center;
-  margin: -1px 0 0;
-}
-
-#wrapper-edit-controls:-moz-any([place="palette"],[place="panel"]) > #edit-controls,
-#wrapper-zoom-controls:-moz-any([place="palette"],[place="panel"]) > #zoom-controls {
-  margin-inline-start: 0;
-}
-
-#PanelUI-contents {
-  max-width: @menuPanelWidth@;
-}
-
-#BMB_bookmarksPopup,
-.panel-mainview:not([panelid="PanelUI-popup"]) {
-  max-width: @standaloneSubviewWidth@;
-}
-
-/* Give WebExtension stand-alone panels extra width for Chrome compatibility */
-.cui-widget-panel[viewId^=PanelUI-webext-] .panel-mainview {
-  max-width: 800px;
-}
-
-.cui-widget-panel[viewId^=PanelUI-webext-] > .panel-arrowcontainer > .panel-arrowcontent {
-  padding: 0;
-}
-
-panelview[id^=PanelUI-webext-] {
-  overflow: hidden;
-}
-
-panelview:not([mainview]) .toolbarbutton-text,
-.cui-widget-panel toolbarbutton > .toolbarbutton-text {
-  text-align: start;
-  display: -moz-box;
-}
-
-.cui-widget-panel > .panel-arrowcontainer > .panel-arrowcontent {
-  padding: 4px 0;
-}
-
-.cui-widget-panel.cui-widget-panelWithFooter > .panel-arrowcontainer > .panel-arrowcontent {
-  padding-bottom: 0;
-}
-
-#PanelUI-contents {
-  display: block;
-  flex: 1 0 auto;
-  margin-left: auto;
-  margin-right: auto;
-  padding: .5em 0;
-  max-width: @menuPanelWidth@;
-}
-
-#PanelUI-contents-scroller {
-  overflow-y: auto;
-  overflow-x: hidden;
-  width: @menuPanelWidth@;
-  padding-left: 5px;
-  padding-right: 5px;
-  flex: auto;
-}
-
-.toolbaritem-combined-buttons@inAnyPanel@ > toolbarbutton > .toolbarbutton-icon {
-  min-width: 0;
-  min-height: 0;
-  margin: 0;
-}
-
-toolbaritem[cui-areatype="menu-panel"][sdkstylewidget="true"]:not(.panel-wide-item),
-.panelUI-grid .toolbarbutton-1,
-.panel-customization-placeholder-child {
-  -moz-appearance: none;
-  -moz-box-orient: vertical;
-  width: calc(@menuPanelButtonWidth@);
-  height: calc(51px + 2.2em);
-}
-
-/* In order to have button labels constrained appropriately, items inside the toolbarpaletteitem
- * should have a min-width set so they abide by the width set above (which they do outside of
- * customize mode because they're in a flexed container) */
-toolbarpaletteitem[place="panel"]:not([haswideitem=true]) > .toolbarbutton-1 {
-  min-width: 0.01px;
-}
-
-/* Help SDK buttons fit in. */
-toolbarpaletteitem[place="palette"] > toolbarbutton[constrain-size="true"] > .toolbarbutton-icon,
-toolbarpaletteitem[place="palette"] > toolbarbutton[constrain-size="true"] > .toolbarbutton-badge-stack > .toolbarbutton-icon,
-toolbarbutton[constrain-size="true"][cui-areatype="menu-panel"] > .toolbarbutton-icon,
-toolbarbutton[constrain-size="true"][cui-areatype="menu-panel"] > .toolbarbutton-badge-stack > .toolbarbutton-icon {
-  height: 32px;
-  width: 32px;
-}
-
-toolbarpaletteitem:-moz-any([place="palette"], [place="panel"]) > toolbaritem[sdkstylewidget="true"] > .toolbarbutton-1 > .toolbarbutton-icon {
-  width: 32px;
-  height: 32px;
-}
-
-.customization-palette .toolbarbutton-1 {
-  -moz-appearance: none;
-  -moz-box-orient: vertical;
-}
-
-.panelUI-grid .toolbarbutton-1 > .toolbarbutton-menubutton-button {
-  -moz-appearance: none;
-  -moz-box-orient: vertical;
-  width: calc(@menuPanelButtonWidth@ - 2px);
-  height: calc(49px + 2.2em);
-  border: 0;
-}
-
-.panelUI-grid .toolbarbutton-1 > .toolbarbutton-menubutton-button > .toolbarbutton-text,
-.panelUI-grid .toolbarbutton-1 > .toolbarbutton-menubutton-button > .toolbarbutton-multiline-text {
-  margin-top: 2px; /* Hack needed to get the label of type=menu-button aligned with other buttons */
-}
-
-.panel-customization-placeholder-child {
-  margin: 6px 0 0;
-  padding: 2px 6px;
-  border: 1px solid transparent;
-}
-
-.panelUI-grid .toolbarbutton-1[type="menu"] {
-  background-image: url("chrome://browser/skin/toolbarbutton-dropdown-arrow.png");
-  background-position: right 3px top 16px;
-  background-repeat: no-repeat;
-}
-
-.panelUI-grid .toolbarbutton-1[type="menu"]:-moz-locale-dir(rtl) {
-  background-position: left 3px top 16px;
-}
-
-.panelUI-grid .toolbarbutton-1 > .toolbarbutton-menu-dropmarker {
-  display: none;
-}
-
-.panelUI-grid .toolbarbutton-1 > .toolbarbutton-menubutton-dropmarker {
-  -moz-box-align: center;
-  width: 16px;
-  margin-inline-start: -16px;
-  height: 51px;
-  margin-bottom: 2.2em;
-  padding: 0;
-}
-
-.panelUI-grid .toolbarbutton-1:not([buttonover])@buttonStateHover@ > .toolbarbutton-menubutton-dropmarker {
-  background-color: var(--arrowpanel-dimmed) !important;
-  border-radius: 0 0 0 2px;
-}
-
-.panelUI-grid .toolbarbutton-1:not([buttonover])@buttonStateHover@ > .toolbarbutton-menubutton-dropmarker:-moz-locale-dir(rtl) {
-  border-radius: 0 0 2px 0;
-}
-
-#main-window:not([customizing]) .panel-combined-button[disabled] > .toolbarbutton-icon {
-  opacity: .5;
-}
-
-toolbaritem[cui-areatype="menu-panel"][sdkstylewidget="true"]:not(.panel-wide-item) {
-  width: calc(@menuPanelButtonWidth@);
-  margin: 0 !important;
-}
-
-toolbaritem[cui-areatype="menu-panel"][sdkstylewidget="true"]:not(.panel-wide-item) {
-  -moz-box-align: center;
-  -moz-box-pack: center;
-}
-
-toolbaritem[cui-areatype="menu-panel"][sdkstylewidget="true"] > iframe {
-  margin: 4px auto;
-}
-
-#PanelUI-multiView[viewtype="subview"] > .panel-viewcontainer > .panel-viewstack > .panel-mainview >  #PanelUI-mainView {
-  background-color: var(--arrowpanel-dimmed);
-}
-
-#PanelUI-multiView[viewtype="subview"] #PanelUI-mainView > #PanelUI-contents-scroller > #PanelUI-contents > .panel-wide-item,
-#PanelUI-multiView[viewtype="subview"] #PanelUI-mainView > #PanelUI-contents-scroller > #PanelUI-contents > .toolbarbutton-1:not([panel-multiview-anchor="true"]),
-#PanelUI-multiView[viewtype="subview"] #PanelUI-mainView > #PanelUI-footer > #PanelUI-update-status,
-#PanelUI-multiView[viewtype="subview"] #PanelUI-mainView > #PanelUI-footer > #PanelUI-footer-fxa > #PanelUI-fxa-status > #PanelUI-fxa-avatar,
-#PanelUI-multiView[viewtype="subview"] #PanelUI-mainView > #PanelUI-footer > #PanelUI-footer-fxa > #PanelUI-fxa-status > #PanelUI-fxa-label,
-#PanelUI-multiView[viewtype="subview"] #PanelUI-mainView > #PanelUI-footer > #PanelUI-footer-fxa > #PanelUI-fxa-icon,
-#PanelUI-multiView[viewtype="subview"] #PanelUI-mainView > #PanelUI-footer > #PanelUI-footer-inner > toolbarseparator,
-#PanelUI-multiView[viewtype="subview"] #PanelUI-mainView > #PanelUI-footer > #PanelUI-footer-inner > #PanelUI-customize,
-#PanelUI-multiView[viewtype="subview"] #PanelUI-mainView > #PanelUI-footer > #PanelUI-footer-inner > #PanelUI-help:not([panel-multiview-anchor="true"]) {
-  opacity: .5;
-}
-
-/*
- * XXXgijs: this is a workaround for a layout issue that was caused by these iframes,
- * which was affecting subview display. Because of this, we're hiding the iframe *only*
- * when displaying a subview. The discerning user might notice this, but it's not nearly
- * as bad as the brokenness.
- * This hack should be removed once https://bugzilla.mozilla.org/show_bug.cgi?id=975375
- * is addressed.
- */
-#PanelUI-multiView[viewtype="subview"] toolbaritem[cui-areatype="menu-panel"][sdkstylewidget="true"]:not(.panel-wide-item) > iframe {
-  visibility: hidden;
-}
-
-toolbaritem[cui-areatype="menu-panel"][sdkstylewidget="true"]:not(.panel-wide-item) > .toolbarbutton-text {
-  text-align: center;
-}
-
-.panelUI-grid .toolbarbutton-1 > .toolbarbutton-menubutton-button > .toolbarbutton-icon,
-.panelUI-grid .toolbarbutton-1 > .toolbarbutton-icon,
-.panelUI-grid .toolbarbutton-1 > .toolbarbutton-badge-stack,
-.customization-palette .toolbarbutton-1 > .toolbarbutton-menubutton-button > .toolbarbutton-icon,
-.customization-palette .toolbarbutton-1 > .toolbarbutton-icon,
-.customization-palette .toolbarbutton-1 > .toolbarbutton-badge-stack,
-.panelUI-grid #bookmarks-toolbar-placeholder > .toolbarbutton-icon,
-.customization-palette #bookmarks-toolbar-placeholder > .toolbarbutton-icon,
-.panel-customization-placeholder-child > .toolbarbutton-icon {
-  width: 32px;
-  height: 32px;
-  min-width: 32px;
-  min-height: 32px;
-  /* Explanation for the below formula (A / B - C)
-     A
-       Each button is @menuPanelButtonWidth@ wide
-     B
-       Each button has two margins.
-     C (46px / 2 = 23px)
-       The button icon is 32 pixels wide.
-       The button has 12px of horizontal padding (6 on each side).
-       The button has 2px of horizontal border (1 on each side).
-       Total width of button's icon + button padding should therefore be 46px,
-       which means each horizontal margin should be the half the button's width - (46/2) px.
-  */
-  margin: 4px calc(@menuPanelButtonWidth@ / 2 - 23px);
-}
-
-/* above we treat the container as the icon for the margins, that is so the
-/* badge itself is positioned correctly. Here we make sure that the icon itself
-/* has the minimum size we want, but no padding/margin. */
-.panelUI-grid .toolbarbutton-1 > .toolbarbutton-badge-stack > .toolbarbutton-icon,
-.customization-palette .toolbarbutton-1 > .toolbarbutton-badge-stack > .toolbarbutton-icon {
-  width: 32px;
-  height: 32px;
-  min-width: 32px;
-  min-height: 32px;
-  margin: 0;
-  padding: 0;
-}
-
-toolbarpaletteitem[place="palette"] > toolbaritem > toolbarbutton {
-  -moz-box-flex: 1;
-}
-
-#personal-bookmarks[overflowedItem=true] > #bookmarks-toolbar-placeholder {
-  -moz-box-flex: 1;
-}
-
-#personal-bookmarks[cui-areatype="toolbar"][overflowedItem=true] > #bookmarks-toolbar-placeholder > .toolbarbutton-icon {
-  margin-inline-end: 2px;
-}
-
-#edit-controls@inAnyPanel@ > #copy-button,
-#zoom-controls@inAnyPanel@ > #zoom-reset-button {
-  border-left: none;
-  border-right: none;
-  border-radius: 0;
-}
-
-#zoom-in-button > .toolbarbutton-text,
-#zoom-out-button > .toolbarbutton-text,
-#zoom-reset-button > .toolbarbutton-icon {
-  display: none;
-}
-
-#PanelUI-footer {
-  display: flex;
-  flex-shrink: 0;
-  flex-direction: column;
-  background-color: var(--arrowpanel-dimmed);
-  padding: 0;
-  margin: 0;
-}
-
-#main-window[customizing] #PanelUI-footer-fxa {
-  display: none;
-}
-
-#PanelUI-footer-fxa:not([fxastatus="signedin"]) > toolbarseparator,
-#PanelUI-footer-fxa:not([fxastatus="signedin"]) > #PanelUI-fxa-icon,
-#PanelUI-footer-fxa:not([fxaprofileimage]) > #PanelUI-fxa-status > #PanelUI-fxa-avatar {
-  display: none;
-}
-
-#PanelUI-footer-fxa[fxastatus="error"] > #PanelUI-fxa-status::after {
-  content: url(chrome://browser/skin/warning.svg);
-  filter: drop-shadow(0 1px 0 hsla(206,50%,10%,.15));
-  width: 47px;
-  padding-top: 1px;
-  display: block;
-  text-align: center;
-  position: relative;
-  top: 25%;
-}
-
-#PanelUI-update-status[update-status]::after {
-  content: "";
-  width: 14px;
-  height: 14px;
-  margin-inline-end: 16.5px;
-  box-shadow: 0px 1px 0px rgba(255,255,255,.2) inset, 0px -1px 0px rgba(0,0,0,.1) inset, 0px 1px 0px rgba(12,27,38,.2);
-  border-radius: 2px;
-  background-size: contain;
-  display: -moz-box;
-}
-
-#PanelUI-update-status[update-status="succeeded"]::after {
-  background-image: url(chrome://browser/skin/update-badge.svg);
-  background-color: #74BF43;
-}
-
-#PanelUI-update-status[update-status="failed"]::after {
-  background-image: url(chrome://browser/skin/update-badge-failed.svg);
-  background-color: #D90000;
-}
-
-#PanelUI-fxa-status {
-  display: flex;
-  flex: 1 1 0%;
-  width: 1px;
-}
-
-#PanelUI-footer-inner,
-#PanelUI-footer-fxa:not([hidden]) {
-  display: flex;
-  border-top: 1px solid var(--panel-separator-color);
-}
-
-#PanelUI-multiView[viewtype="subview"] #PanelUI-footer-inner,
-#PanelUI-multiView[viewtype="subview"] #PanelUI-footer-fxa {
-  position: relative;
-}
-
-#PanelUI-footer-inner > toolbarseparator,
-#PanelUI-footer-fxa > toolbarseparator {
-  border: 0;
-  border-left: 1px solid var(--panel-separator-color);
-  margin: 7px 0 7px;
-  -moz-appearance: none;
-}
-
-#PanelUI-footer-inner:hover > toolbarseparator,
-#PanelUI-footer-fxa:hover > toolbarseparator {
-  margin: 0;
-}
-
-#PanelUI-update-status,
-#PanelUI-help,
-#PanelUI-fxa-label,
-#PanelUI-fxa-icon,
-#PanelUI-customize,
-#PanelUI-quit {
-  margin: 0;
-  padding: 11px 0;
-  box-sizing: border-box;
-  min-height: 40px;
-  -moz-appearance: none;
-  box-shadow: none;
-  border: none;
-  border-radius: 0;
-  transition: background-color;
-  -moz-box-orient: horizontal;
-}
-
-#PanelUI-update-status {
-  border-top: 1px solid var(--panel-separator-color);
-}
-
-#PanelUI-update-status {
-  border-bottom: 1px solid transparent;
-  margin-bottom: -1px;
-}
-
-#PanelUI-update-status > .toolbarbutton-text {
-  width: 0; /* Fancy cropping solution for flexbox. */
-}
-
-#PanelUI-help,
-#PanelUI-quit {
-  min-width: 46px;
-}
-
-#PanelUI-update-status > .toolbarbutton-text,
-#PanelUI-fxa-label > .toolbarbutton-text,
-#PanelUI-customize > .toolbarbutton-text {
-  margin: 0;
-  padding: 0 6px;
-  text-align: start;
-}
-
-#PanelUI-help > .toolbarbutton-text,
-#PanelUI-quit > .toolbarbutton-text,
-#PanelUI-fxa-avatar > .toolbarbutton-text {
-  display: none;
-}
-
-#PanelUI-update-status > .toolbarbutton-icon,
-#PanelUI-fxa-label > .toolbarbutton-icon,
-#PanelUI-fxa-icon > .toolbarbutton-icon,
-#PanelUI-customize > .toolbarbutton-icon,
-#PanelUI-help > .toolbarbutton-icon,
-#PanelUI-quit > .toolbarbutton-icon {
-  margin-inline-end: 0;
-}
-
-#PanelUI-fxa-icon {
-  padding-inline-start: 15px;
-  padding-inline-end: 15px;
-}
-
-#PanelUI-fxa-label,
-#PanelUI-customize {
-  flex: 1;
-  padding-inline-start: 15px;
-  border-inline-start-style: none;
-}
-
-#PanelUI-footer-fxa[fxaprofileimage="set"] > #PanelUI-fxa-status > #PanelUI-fxa-label,
-#PanelUI-footer-fxa[fxaprofileimage="enabled"]:not([fxastatus="error"]) > #PanelUI-fxa-status > #PanelUI-fxa-label {
-  padding-inline-start: 0px;
-}
-
-#PanelUI-update-status {
-  width: calc(@menuPanelWidth@ + 30px);
-  padding-inline-start: 15px;
-  border-inline-start-style: none;
-}
-
-#PanelUI-update-status {
-  list-style-image: url(chrome://branding/content/icon16.png);
-}
-
-#PanelUI-fxa-label,
-#PanelUI-fxa-icon {
-  list-style-image: url(chrome://browser/skin/sync-horizontalbar.png);
-}
-
-#PanelUI-remotetabs {
-  --panel-ui-sync-illustration-height: 157.5px;
-}
-
-.PanelUI-remotetabs-instruction-title,
-.PanelUI-remotetabs-instruction-label,
-#PanelUI-remotetabs-mobile-promo {
-  /* If you change the margin here, the min-height of the synced tabs panel
-    (e.g. #PanelUI-remotetabs[mainview] #PanelUI-remotetabs-setupsync, etc) may
-    need adjusting (see bug 1248506) */
-  margin: 15px;
-  text-align: center;
-  text-shadow: none;
-  max-width: 15em;
-  color: GrayText;
-}
-
-.PanelUI-remotetabs-instruction-title {
-  font-size: 1.3em;
-}
-
-/* The boxes with "instructions" get extra top and bottom padding for space
-   around the illustration and buttons */
-.PanelUI-remotetabs-instruction-box {
-  /* If you change the padding here, the min-height of the synced tabs panel
-    (e.g. #PanelUI-remotetabs[mainview] #PanelUI-remotetabs-setupsync, etc) may
-    need adjusting (see bug 1248506) */
-  padding-bottom: 30px;
-  padding-top: 15px;
-}
-
-.PanelUI-remotetabs-prefs-button {
-  -moz-appearance: none;
-  background-color: #0096dd;
-  /* !important for the color as an OSX specific rule when a lightweight theme
-     is used for buttons in the toolbox overrides. See bug 1238531 for details */
-  color: white !important;
-  border-radius: 2px;
-  /* If you change the margin or padding below, the min-height of the synced tabs
-     panel (e.g. #PanelUI-remotetabs[mainview] #PanelUI-remotetabs-setupsync,
-     etc) may need adjusting (see bug 1248506) */
-  margin-top: 10px;
-  margin-bottom: 10px;
-  padding: 8px;
-  text-shadow: none;
-  min-width: 200px;
-}
-
-.PanelUI-remotetabs-prefs-button:hover,
-.PanelUI-remotetabs-prefs-button:hover:active {
-  background-color: #018acb;
-}
-
-.remotetabs-promo-link {
-  margin: 0;
-}
-
-.PanelUI-remotetabs-notabsforclient-label {
-  color: GrayText;
-  /* This margin is to line this label up with the labels in toolbarbuttons. */
-  margin-left: 28px;
-}
-
-.fxaSyncIllustration {
-  height: var(--panel-ui-sync-illustration-height);
-  list-style-image: url(chrome://browser/skin/fxa/sync-illustration.svg);
-}
-
-.PanelUI-remotetabs-prefs-button > .toolbarbutton-text {
-  /* !important to override ".cui-widget-panel toolbarbutton > .toolbarbutton-text" above. */
-  text-align: center !important;
-  text-shadow: none;
-}
-
-#PanelUI-remotetabs[mainview] { /* panel anchored to toolbar button might be too skinny */
-  min-width: 19em;
-}
-
-/* Work around bug 1224412 - these boxes will cause scrollbars to appear when
-   the panel is anchored to a toolbar button.
-*/
-#PanelUI-remotetabs[mainview] #PanelUI-remotetabs-setupsync,
-#PanelUI-remotetabs[mainview] #PanelUI-remotetabs-reauthsync,
-#PanelUI-remotetabs[mainview] #PanelUI-remotetabs-nodevicespane,
-#PanelUI-remotetabs[mainview] #PanelUI-remotetabs-tabsdisabledpane {
-  min-height: calc(var(--panel-ui-sync-illustration-height) +
-                   20px + /* margin of .PanelUI-remotetabs-prefs-button */
-                   16px + /* padding of .PanelUI-remotetabs-prefs-button */
-                   30px + /* margin of .PanelUI-remotetabs-instruction-label */
-                   30px + 15px + /* padding of .PanelUI-remotetabs-instruction-box */
-                   11em);
-}
-
-#PanelUI-remotetabs-tabslist > label[itemtype="client"] {
-  color: GrayText;
-}
-
-/* Collapse the non-active vboxes in the remotetabs deck to use only the
-   height the active box needs */
-#PanelUI-remotetabs-deck:not([selectedIndex="1"]) > #PanelUI-remotetabs-tabsdisabledpane,
-#PanelUI-remotetabs-deck:not([selectedIndex="2"]) > #PanelUI-remotetabs-fetching,
-#PanelUI-remotetabs-deck:not([selectedIndex="3"]) > #PanelUI-remotetabs-nodevicespane {
-  visibility: collapse;
-}
-
-#PanelUI-remotetabs-main[devices-status="single"] > #PanelUI-remotetabs-buttons {
-  display: none;
-}
-
-#PanelUI-fxa-icon[syncstatus="active"]:not([disabled]) {
-  list-style-image: url(chrome://browser/skin/syncProgress-horizontalbar.png);
-}
-
-#PanelUI-footer-fxa[fxastatus="migrate-signup"] > #PanelUI-fxa-status > #PanelUI-fxa-label,
-#PanelUI-footer-fxa[fxastatus="migrate-verify"] > #PanelUI-fxa-status > #PanelUI-fxa-label {
-  list-style-image: url(chrome://browser/skin/warning.svg);
-  -moz-image-region: auto;
-}
-
-#PanelUI-customize {
-  list-style-image: url(chrome://browser/skin/menuPanel-customize.png);
-}
-
-#customization-panelHolder #PanelUI-customize {
-  list-style-image: url(chrome://browser/skin/customizableui/menuPanel-customizeFinish.png);
-}
-
-#PanelUI-help {
-  list-style-image: url(chrome://browser/skin/menuPanel-help.png);
-}
-
-#PanelUI-quit {
-  border-inline-end-style: none;
-  list-style-image: url(chrome://browser/skin/menuPanel-exit.png);
-}
-
-#PanelUI-fxa-label,
-#PanelUI-fxa-icon,
-#PanelUI-customize,
-#PanelUI-help,
-#PanelUI-quit {
-  -moz-image-region: rect(0, 16px, 16px, 0);
-}
-
-#PanelUI-footer-fxa[fxastatus="signedin"] > #PanelUI-fxa-status > #PanelUI-fxa-label > .toolbarbutton-icon,
-#PanelUI-footer-fxa[fxastatus="error"][fxaprofileimage="set"] > #PanelUI-fxa-status > #PanelUI-fxa-label > .toolbarbutton-icon {
-  display: none;
-}
-
-#PanelUI-footer-fxa[fxastatus="error"]:not([fxaprofileimage="set"]) > #PanelUI-fxa-status > #PanelUI-fxa-avatar {
-  display: none;
-}
-
-#PanelUI-fxa-status[disabled],
-#PanelUI-fxa-icon[disabled] {
-  pointer-events: none;
-}
-
-#PanelUI-fxa-avatar {
-  width: 32px;
-  height: 32px;
-  border-radius: 50%;
-  background-repeat: no-repeat;
-  background-position: 0 0;
-  background-size: contain;
-  align-self: center;
-  margin: 0px 7px;
-  padding: 0px;
-  border: 0px none;
-  margin-inline-end: 0;
-}
-
-#PanelUI-footer-fxa[fxaprofileimage="enabled"] > #PanelUI-fxa-status > #PanelUI-fxa-avatar {
-  list-style-image: url(chrome://browser/skin/fxa/default-avatar.svg);
-}
-
-#PanelUI-customize:hover,
-#PanelUI-help:not([disabled]):hover,
-#PanelUI-quit:not([disabled]):hover {
-  -moz-image-region: rect(0, 32px, 16px, 16px);
-}
-
-#PanelUI-customize:hover:active,
-#PanelUI-help:not([disabled]):hover:active,
-#PanelUI-quit:not([disabled]):hover:active {
-  -moz-image-region: rect(0, 48px, 16px, 32px);
-}
-
-#PanelUI-help[panel-multiview-anchor="true"] {
-  -moz-image-region: rect(0, 64px, 16px, 48px);
-}
-
-#PanelUI-help[disabled],
-#PanelUI-quit[disabled],
-#PanelUI-fxa-icon[disabled],
-#PanelUI-fxa-avatar[disabled],
-#PanelUI-fxa-label[disabled] > .toolbarbutton-icon,
-#PanelUI-fxa-status::after {
-  opacity: 0.4;
-}
-
-#PanelUI-fxa-status:not([disabled]):hover,
-#PanelUI-fxa-icon:not([disabled]):hover,
-#PanelUI-help:not([disabled]):hover,
-#PanelUI-customize:hover,
-#PanelUI-quit:not([disabled]):hover {
-  outline: 1px solid var(--arrowpanel-dimmed);
-  background-color: var(--arrowpanel-dimmed);
-}
-
-#PanelUI-fxa-status:not([disabled]):hover:active,
-#PanelUI-fxa-icon:not([disabled]):hover:active,
-#PanelUI-help:not([disabled]):hover:active,
-#PanelUI-customize:hover:active,
-#PanelUI-quit:not([disabled]):hover:active {
-  outline: 1px solid var(--arrowpanel-dimmed-further);
-  background-color: var(--arrowpanel-dimmed-further);
-  box-shadow: 0 1px 0 hsla(210,4%,10%,.05) inset;
-}
-
-#PanelUI-fxa-status:not([disabled]):hover,
-#PanelUI-fxa-status:not([disabled]):hover:active,
-#PanelUI-fxa-icon:not([disabled]):hover,
-#PanelUI-fxa-icon:not([disabled]):hover:active {
-  outline: none;
-}
-
-#PanelUI-footer-fxa[fxastatus="error"] {
-  background-color: hsl(42,94%,88%);
-  border-top: 1px solid hsl(42,94%,70%);
-}
-
-#PanelUI-footer-fxa[fxastatus="error"] > #PanelUI-fxa-status:hover {
-  background-color: hsl(42,94%,85%);
-}
-
-#PanelUI-footer-fxa[fxastatus="error"] > #PanelUI-fxa-status:hover:active {
-  background-color: hsl(42,94%,82%);
-  box-shadow: 0 1px 0 hsla(210,4%,10%,.05) inset;
-}
-
-#PanelUI-update-status {
-  color: black;
-}
-
-#PanelUI-update-status[update-status="succeeded"] {
-  background-color: hsla(96,65%,75%,.5);
-}
-
-#PanelUI-update-status[update-status="succeeded"]:not([disabled]):hover {
-  background-color: hsla(96,65%,75%,.8);
-}
-
-#PanelUI-update-status[update-status="succeeded"]:not([disabled]):hover:active {
-  background-color: hsl(96,65%,75%);
-}
-
-#PanelUI-update-status[update-status="failed"] {
-  background-color: hsla(359,69%,84%,.5);
-}
-
-#PanelUI-update-status[update-status="failed"]:not([disabled]):hover {
-  background-color: hsla(359,69%,84%,.8);
-}
-
-#PanelUI-update-status[update-status="failed"]:not([disabled]):hover:active {
-  background-color: hsl(359,69%,84%);
-}
-
-#PanelUI-quit:not([disabled]):hover {
-  background-color: #d94141;
-  outline-color: #c23a3a;
-}
-
-#PanelUI-quit:not([disabled]):hover:active {
-  background-color: #ad3434;
-  outline-color: #992e2e;
-}
-
-#customization-panelHolder #PanelUI-customize {
-  color: white;
-  background-color: hsl(108,66%,30%);
-  text-shadow: none;
-  margin-top: -1px;
-}
-
-#customization-panelHolder #PanelUI-customize + toolbarseparator {
-  display: none;
-}
-
-#customization-panelHolder #PanelUI-customize:hover {
-  background-color: hsl(109,65%,26%);
-}
-
-#customization-panelHolder #PanelUI-customize:hover:active {
-  background-color: hsl(109,65%,22%);
-}
-
-#customization-palette .toolbarbutton-multiline-text,
-#customization-palette .toolbarbutton-text {
-  display: none;
-}
-
-panelview .toolbarbutton-1,
-.subviewbutton,
-.widget-overflow-list .toolbarbutton-1,
-.panelUI-grid .toolbarbutton-1 > .toolbarbutton-menubutton-button,
-.toolbaritem-combined-buttons@inAnyPanel@ > toolbarbutton {
-  -moz-appearance: none;
-  padding: 0 6px;
-  background-color: transparent;
-  border-radius: 2px;
-  border-style: solid;
-  border-color: transparent;
-}
-
-panelview .toolbarbutton-1,
-.subviewbutton,
-.widget-overflow-list .toolbarbutton-1,
-.toolbaritem-combined-buttons@inAnyPanel@ > toolbarbutton {
-  border-width: 1px;
-}
-
-.subviewbutton.panel-subview-footer {
-  border-radius: 0;
-  border: none;
-}
-
-.subviewbutton.panel-subview-footer > .menu-text {
-  -moz-appearance: none;
-  margin-inline-start: 0px !important;
-  padding-inline-start: 6px;
-  padding-inline-end: 6px;
-  -moz-box-flex: 0;
-  text-align: center;
-}
-
-.subviewbutton.panel-subview-footer > .toolbarbutton-icon {
-  margin: 0;
-}
-
-.subviewbutton.panel-subview-footer > .toolbarbutton-text {
-  text-align: center;
-  padding: 0;
-}
-
-.subviewbutton.panel-subview-footer > .menu-accel-container {
-  padding-inline-start: 6px;
-}
-
-.subviewbutton:not(.panel-subview-footer) {
-  margin: 0;
-}
-
-.subviewbutton:not(.panel-subview-footer) > .toolbarbutton-text,
-/* Bookmark items need a more specific selector. */
-.PanelUI-subView .subviewbutton:not(.panel-subview-footer) > .menu-text,
-.PanelUI-subView .subviewbutton:not(.panel-subview-footer) > .menu-iconic-text {
-  font: menu;
-}
-
-.PanelUI-subView .subviewbutton[shortcut]::after {
-  content: attr(shortcut);
-  float: right;
-  color: GrayText;
-}
-
-.PanelUI-subView.cui-widget-panelview .subviewbutton[shortcut]::after {
-  margin-inline-start: 10px;
-}
-
-/* This is a <label> but it should fit in with the menu font- and colorwise. */
-#PanelUI-characterEncodingView-autodetect-label {
-  font: menu;
-  color: inherit;
-}
-
-.cui-widget-panelview .subviewbutton:not(.panel-subview-footer) {
-  margin-left: 4px;
-  margin-right: 4px;
-}
-
-panelview .toolbarbutton-1,
-.widget-overflow-list > .toolbarbutton-1:not(:first-child),
-.widget-overflow-list > toolbaritem:not(:first-child) {
-  margin-top: 6px;
-}
-
-panelview .toolbarbutton-1@buttonStateHover@,
-toolbarbutton.subviewbutton@buttonStateHover@,
-menu.subviewbutton@menuStateHover@,
-menuitem.subviewbutton@menuStateHover@,
-.widget-overflow-list .toolbarbutton-1@buttonStateHover@,
-.toolbaritem-combined-buttons@inAnyPanel@ > toolbarbutton@buttonStateHover@ {
-  background-color: var(--arrowpanel-dimmed);
-  border-color: var(--panel-separator-color);
-}
-
-.toolbaritem-combined-buttons@inAnyPanel@@buttonStateHover@ {
-  border-color: var(--panel-separator-color);
-}
-
-panelview .toolbarbutton-1:-moz-any(@buttonStateActive@,[checked=true]),
-toolbarbutton.subviewbutton@buttonStateActive@,
-menu.subviewbutton@menuStateActive@,
-menuitem.subviewbutton@menuStateActive@,
-.widget-overflow-list .toolbarbutton-1@buttonStateActive@,
-.toolbaritem-combined-buttons@inAnyPanel@ > toolbarbutton@buttonStateActive@ {
-  background-color: var(--arrowpanel-dimmed-further);
-  border-color: var(--panel-separator-color);
-  box-shadow: 0 1px 0 hsla(210,4%,10%,.03) inset;
-}
-
-.subviewbutton.panel-subview-footer {
-  margin: 4px -4px -4px;
-  background-color: var(--arrowpanel-dimmed);
-  border-top: 1px solid var(--panel-separator-color);
-  border-radius: 0;
-}
-
-menuitem.panel-subview-footer@menuStateHover@,
-.subviewbutton.panel-subview-footer@buttonStateHover@ {
-  background-color: var(--arrowpanel-dimmed-further);
-}
-
-menuitem.panel-subview-footer@menuStateActive@,
-.subviewbutton.panel-subview-footer@buttonStateActive@ {
-  background-color: var(--arrowpanel-dimmed-even-further);
-  box-shadow: 0 1px 0 hsla(210,4%,10%,.05) inset;
-}
-
-#BMB_bookmarksPopup .subviewbutton {
-  font: menu;
-  font-weight: normal;
-}
-
-#BMB_bookmarksPopup .subviewbutton:not([disabled="true"]) {
-  color: inherit;
-}
-
-#BMB_bookmarksPopup .panel-arrowcontainer > .panel-arrowcontent > .popup-internal-box > .autorepeatbutton-up,
-#BMB_bookmarksPopup .panel-arrowcontainer > .panel-arrowcontent > .popup-internal-box > .autorepeatbutton-down {
-  -moz-appearance: none;
-  margin-top: 0;
-  margin-bottom: 0;
-}
-
-/* Remove padding on xul:arrowscrollbox to avoid extra padding on footer */
-#BMB_bookmarksPopup arrowscrollbox {
-  padding-bottom: 0px;
-}
-
-#BMB_bookmarksPopup menupopup > .bookmarks-actions-menuseparator {
-  /* Hide bottom separator as the styled footer includes a top border serving the same purpose */
-  display: none;
-}
-
-/* Popups with only one item don't have a footer */
-#BMB_bookmarksPopup menupopup[placespopup=true][singleitempopup=true] > hbox > .popup-internal-box > .arrowscrollbox-scrollbox > .scrollbox-innerbox,
-/* These popups never have a footer */
-#BMB_bookmarksToolbarPopup > hbox > .popup-internal-box > .arrowscrollbox-scrollbox > .scrollbox-innerbox,
-#BMB_unsortedBookmarksPopup > hbox > .popup-internal-box > .arrowscrollbox-scrollbox > .scrollbox-innerbox {
-  /* And so they need some bottom padding: */
-  padding-bottom: 4px;
-}
-
-/* Disabled (empty) item is always alone and never has an icon, so fix its left padding */
-#BMB_bookmarksPopup menupopup[emptyplacesresult] .bookmark-item.subviewbutton {
-  padding-left: 6px;
-}
-
-.PanelUI-subView menuseparator,
-.PanelUI-subView toolbarseparator,
-.cui-widget-panelview menuseparator {
-  -moz-appearance: none;
-  min-height: 0;
-  border-top: 1px solid var(--panel-separator-color);
-  border-bottom: none;
-  margin: 6px 0;
-  padding: 0;
-}
-
-.PanelUI-subView menuseparator,
-.PanelUI-subView toolbarseparator {
-  margin-inline-start: -5px;
-  margin-inline-end: -4px;
-}
-
-.PanelUI-subView menuseparator.small-separator,
-.PanelUI-subView toolbarseparator.small-separator {
-  margin-left: 5px;
-  margin-right: 5px;
-}
-
-.cui-widget-panelview menuseparator.small-separator {
-  margin-left: 10px;
-  margin-right: 10px;
-}
-
-.subviewbutton > .menu-accel-container {
-  -moz-box-pack: start;
-  margin-inline-start: 10px;
-  margin-inline-end: auto;
-  color: GrayText;
-}
-
-#PanelUI-remotetabs-tabslist > toolbarbutton,
-#PanelUI-historyItems > toolbarbutton {
-  list-style-image: url("chrome://mozapps/skin/places/defaultFavicon.png");
-}
-
-@media (min-resolution: 1.1dppx) {
-  #PanelUI-remotetabs-tabslist > toolbarbutton,
-  #PanelUI-historyItems > toolbarbutton {
-    list-style-image: url("chrome://mozapps/skin/places/defaultFavicon@2x.png");
-  }
-}
-
-#PanelUI-remotetabs-tabslist > toolbarbutton > .toolbarbutton-icon,
-#PanelUI-recentlyClosedWindows > toolbarbutton > .toolbarbutton-icon,
-#PanelUI-recentlyClosedTabs > toolbarbutton > .toolbarbutton-icon,
-#PanelUI-historyItems > toolbarbutton > .toolbarbutton-icon {
-  width: 16px;
-  height: 16px;
-}
-
-toolbarbutton[panel-multiview-anchor="true"],
-toolbarbutton[panel-multiview-anchor="true"] > .toolbarbutton-menubutton-button {
-  color: HighlightText;
-  background-color: Highlight;
-}
-
-#PanelUI-help[panel-multiview-anchor="true"] + toolbarseparator {
-  display: none;
-}
-
-#PanelUI-help[panel-multiview-anchor="true"] {
-  background-image: linear-gradient(rgba(255,255,255,0.3), transparent);
-  background-position: 0;
-}
-
-#PanelUI-help[panel-multiview-anchor="true"]::after {
-  content: "";
-  position: absolute;
-  top: 0;
-  height: 100%;
-  width: var(--panel-ui-exit-subview-gutter-width);
-  background-image: url(chrome://browser/skin/customizableui/subView-arrow-back-inverted.png),
-                    linear-gradient(rgba(255,255,255,0.3), transparent);
-  background-repeat: no-repeat;
-  background-color: Highlight;
-  background-position: left 10px center, 0;
-}
-
-#PanelUI-help[panel-multiview-anchor="true"]:-moz-locale-dir(rtl)::after {
-  background-image: url(chrome://browser/skin/customizableui/subView-arrow-back-inverted-rtl.png),
-                    linear-gradient(rgba(255,255,255,0.3), transparent);
-  background-position: right 10px center, 0;
-}
-
-toolbarbutton[panel-multiview-anchor="true"] {
-  background-image: url(chrome://browser/skin/customizableui/subView-arrow-back-inverted.png),
-                    linear-gradient(rgba(255,255,255,0.3), transparent);
-  background-position: right calc(@menuPanelButtonWidth@ / 2 - var(--panel-ui-exit-subview-gutter-width) + 2px) center;
-  background-repeat: no-repeat, repeat;
-}
-
-toolbarbutton[panel-multiview-anchor="true"]:-moz-locale-dir(rtl) {
-  background-image: url(chrome://browser/skin/customizableui/subView-arrow-back-inverted-rtl.png),
-                    linear-gradient(rgba(255,255,255,0.3), transparent);
-  background-position: left calc(@menuPanelButtonWidth@ / 2 - var(--panel-ui-exit-subview-gutter-width) + 2px) center;
-}
-
-toolbarpaletteitem[place="palette"] > .toolbarbutton-1 > .toolbarbutton-menubutton-dropmarker,
-#bookmarks-menu-button[cui-areatype="menu-panel"] > .toolbarbutton-menubutton-dropmarker {
-  display: none;
-}
-
-#search-container[cui-areatype="menu-panel"],
-#wrapper-search-container[place="panel"] {
-  width: @menuPanelWidth@;
-}
-
-#search-container[cui-areatype="menu-panel"] {
-  margin-top: 6px;
-  margin-bottom: 6px;
-}
-
-toolbarpaletteitem[place="palette"] > #search-container {
-  min-width: 7em;
-  width: 7em;
-}
-
-.toolbaritem-combined-buttons@inAnyPanel@ {
-  background-color: transparent;
-  border-radius: 2px;
-  border: 1px solid;
-  border-color: transparent;
-  border-bottom-color: var(--panel-separator-color);
-  padding: 0;
-  transition-property: background-color, border-color;
-  transition-duration: 150ms;
-}
-
-/* Make direct siblings overlap borders: */
-.toolbaritem-combined-buttons + .toolbaritem-combined-buttons@inAnyPanel@ {
-  border-top-color: transparent !important;
-}
-
-.toolbaritem-combined-buttons + .toolbaritem-combined-buttons@inAnyPanel@,
-toolbarpaletteitem[haswideitem][place="panel"] + toolbarpaletteitem[haswideitem][place="panel"] {
-  margin-top: -1px;
-}
-
-.toolbaritem-combined-buttons@inAnyPanel@ > toolbarbutton {
-  border: 0;
-  padding: .5em;
-  margin: 0;
-  -moz-box-flex: 1;
-  min-width: calc(@menuPanelButtonWidth@);
-  max-width: calc(@menuPanelButtonWidth@);
-  /* We'd prefer to use height: auto here but it leads to layout bugs in the panel. Cope:
-     1.2em for line height + 2 * .5em padding + margin on the label (2 * 2px) */
-  height: calc(2.2em + 4px);
-  max-height: none;
-  -moz-box-orient: horizontal;
-}
-
-#edit-controls@inAnyPanel@ > #copy-button,
-#zoom-controls@inAnyPanel@ > #zoom-reset-button {
-  /* reduce the width with 2px for this button to compensate for two separators
-     of 1px. */
-  min-width: calc(@menuPanelButtonWidth@ - 2px);
-  max-width: calc(@menuPanelButtonWidth@ - 2px);
-}
-
-#main-window:not([customizing]) .toolbaritem-combined-buttons@inAnyPanel@ > toolbarbutton[disabled] > .toolbarbutton-icon {
-  opacity: .25;
-}
-
-#zoom-controls[cui-areatype="toolbar"] > #zoom-reset-button > .toolbarbutton-text {
-%ifdef XP_MACOSX
-  min-width: 6ch;
-%else
-  min-width: 7ch;
-%endif
-}
-
-#edit-controls@inAnyPanel@ > #cut-button:-moz-locale-dir(ltr),
-#edit-controls@inAnyPanel@ > #paste-button:-moz-locale-dir(rtl),
-#zoom-controls@inAnyPanel@ > #zoom-out-button:-moz-locale-dir(ltr),
-#zoom-controls@inAnyPanel@ > #zoom-in-button:-moz-locale-dir(rtl) {
-  border-top-right-radius: 0;
-  border-bottom-right-radius: 0;
-}
-
-#edit-controls@inAnyPanel@ > #cut-button:-moz-locale-dir(rtl),
-#edit-controls@inAnyPanel@ > #paste-button:-moz-locale-dir(ltr),
-#zoom-controls@inAnyPanel@ > #zoom-out-button:-moz-locale-dir(rtl),
-#zoom-controls@inAnyPanel@ > #zoom-in-button:-moz-locale-dir(ltr) {
-  border-top-left-radius: 0;
-  border-bottom-left-radius: 0;
-}
-
-.toolbaritem-combined-buttons@inAnyPanel@ > separator {
-  -moz-appearance: none;
-  -moz-box-align: stretch;
-  margin: .5em 0;
-  width: 1px;
-  height: auto;
-  background: var(--panel-separator-color);
-  transition-property: margin;
-  transition-duration: 10ms;
-  transition-timing-function: ease;
-}
-
-.toolbaritem-combined-buttons@inAnyPanel@:hover > separator {
-  margin: 0;
-}
-
-#widget-overflow > .panel-arrowcontainer > .panel-arrowcontent {
-  padding: 0;
-}
-
-.cui-widget-panelview,
-#widget-overflow-scroller {
-  overflow-y: auto;
-  overflow-x: hidden;
-}
-
-#widget-overflow-scroller {
-  max-height: 30em;
-  margin-top: 10px;
-  margin-bottom: 10px;
-}
-
-#widget-overflow-list {
-  width: @menuPanelWidth@;
-  padding-left: 10px;
-  padding-right: 10px;
-}
-
-toolbaritem[overflowedItem=true],
-.widget-overflow-list .toolbarbutton-1 {
-  width: 100%;
-  max-width: @menuPanelWidth@;
-  min-height: 36px;
-  background-repeat: no-repeat;
-  background-position: 0 center;
-}
-
-.widget-overflow-list .toolbarbutton-1,
-.widget-overflow-list .toolbarbutton-1 > .toolbarbutton-menubutton-button {
-  -moz-box-align: center;
-  -moz-box-orient: horizontal;
-}
-
-.widget-overflow-list .toolbarbutton-1:not(.toolbarbutton-combined) > .toolbarbutton-text,
-.widget-overflow-list .toolbarbutton-1 > .toolbarbutton-menubutton-button > .toolbarbutton-text {
-  text-align: start;
-  padding-inline-start: .5em;
-}
-
-#widget-overflow-list > .toolbaritem-combined-buttons {
-  min-height: 28px;
-}
-
-.widget-overflow-list .toolbarbutton-1 > .toolbarbutton-menubutton-button::after {
-  content: "";
-  display: -moz-box;
-  width: 1px;
-  height: 18px;
-  margin-inline-end: -1px;
-  background-image: linear-gradient(hsla(210,54%,20%,.2) 0, hsla(210,54%,20%,.2) 18px);
-  background-clip: padding-box;
-  background-position: center;
-  background-repeat: no-repeat;
-  background-size: 1px 18px;
-  box-shadow: 0 0 0 1px hsla(0,0%,100%,.2);
-}
-
-.subviewbutton[checked="true"] {
-  background: url("chrome://global/skin/menu/shared-menu-check.png") center left 7px / 11px 11px no-repeat transparent;
-}
-
-.subviewbutton[checked="true"]:-moz-locale-dir(rtl) {
-  background-position: center right 7px;
-}
-
-.subviewbutton > .menu-iconic-left {
-  -moz-appearance: none;
-  margin-inline-end: 3px;
-}
-
-menuitem[checked="true"].subviewbutton > .menu-iconic-left {
-  visibility: hidden;
-}
-
-#PanelUI-containersItems > .subviewbutton > .toolbarbutton-icon {
-  width: 16px;
-  height: 16px;
-}
-
-.panel-mainview[panelid=customizationui-widget-panel],
-#customizationui-widget-multiview > .panel-viewcontainer,
-#customizationui-widget-multiview > .panel-viewcontainer > .panel-viewstack,
-#PanelUI-panicView > .panel-subview-body,
-#PanelUI-panicView {
-  overflow: visible;
-}
-
-#PanelUI-panicView.cui-widget-panelview {
-  min-width: 280px;
-}
-
-#PanelUI-panic-timeframe {
-  padding: 15px;
-  border-bottom: 1px solid var(--panel-separator-color);
-}
-
-#panic-button-success-icon,
-#PanelUI-panic-timeframe-icon,
-#PanelUI-panic-timeframe-icon-small {
-  background-color: transparent;
-  margin-inline-end: 10px;
-}
-
-#panic-button-success-icon,
-#PanelUI-panic-timeframe-icon {
-  list-style-image: url(chrome://browser/skin/panic-panel/header.png);
-  max-height: 48px;
-  width: 48px;
-}
-
-#PanelUI-panic-timeframe-icon-small {
-  list-style-image: url(chrome://browser/skin/panic-panel/header-small.png);
-  max-height: 32px;
-  width: 32px;
-}
-
-/* current attribute is only set when in use as a subview instead of a main view */
-#PanelUI-panicView[current] #PanelUI-panic-timeframe-icon {
-  display: none;
-}
-
-#PanelUI-panicView.cui-widget-panelview #PanelUI-panic-timeframe-icon-small {
-  display: none;
-}
-
-#panic-button-success-header,
-#PanelUI-panic-header {
-  -moz-box-align: center;
-  margin-bottom: 5px;
-}
-
-#PanelUI-panicView.cui-widget-panelview #PanelUI-panic-header {
-  margin-bottom: 0;
-}
-
-#PanelUI-panic-timeframe-icon-small:-moz-locale-dir(rtl),
-#PanelUI-panic-timeframe-icon:-moz-locale-dir(rtl) {
-  transform: scaleX(-1);
-}
-
-.subviewradio {
-  -moz-binding: url(chrome://global/content/bindings/radio.xml#radio);
-  -moz-appearance: none;
-  -moz-box-align: center;
-  padding: 1px;
-  margin: 0 0 2px;
-  background-color: transparent;
-  border-radius: 2px;
-  border: 1px solid transparent;
-}
-
-.subviewradio@buttonStateHover@ {
-  background-color: var(--arrowpanel-dimmed);
-  border-color: var(--panel-separator-color);
-}
-
-.subviewradio[selected],
-.subviewradio[selected]:hover,
-.subviewradio@buttonStateActive@ {
-  background-color: var(--arrowpanel-dimmed-further);
-  border-color: var(--panel-separator-color);
-  box-shadow: 0 1px 0 hsla(210,4%,10%,.03) inset;
-}
-
-.subviewradio > .radio-check {
-  -moz-appearance: none;
-  width: 16px;
-  height: 16px;
-  border: 1px solid #e7e7e7;
-  border-radius: 50%;
-  margin: 1px 5px;
-  background-color: #f1f1f1;
-}
-
-.subviewradio > .radio-check[selected] {
-  background-color: #fff;
-  border: 4px solid #177ee6;
-}
-
-#PanelUI-panic-explanations {
-  padding: 10px 10px 0;
-}
-
-#PanelUI-panic-actionlist-main-label {
-  color: GrayText;
-  font-size: 0.9em;
-}
-
-.PanelUI-panic-actionlist {
-  padding-inline-start: 20px;
-  padding-top: 2px;
-  padding-bottom: 2px;
-  background-size: 16px 16px;
-  background-repeat: no-repeat;
-  background-color: transparent;
-  background-position: center left;
-}
-
-.PanelUI-panic-actionlist:-moz-locale-dir(rtl) {
-  background-position: center right;
-}
-
-#PanelUI-panic-actionlist-cookies {
-  background-image: -moz-image-rect(url(chrome://browser/skin/panic-panel/icons.png), 0, 16, 16, 0);
-}
-
-#PanelUI-panic-actionlist-history {
-  background-image: -moz-image-rect(url(chrome://browser/skin/panic-panel/icons.png), 0, 32, 16, 16);
-}
-
-#PanelUI-panic-actionlist-windows {
-  background-image: -moz-image-rect(url(chrome://browser/skin/panic-panel/icons.png), 0, 48, 16, 32);
-}
-
-#PanelUI-panic-actionlist-newwindow {
-  background-image: -moz-image-rect(url(chrome://browser/skin/panic-panel/icons.png), 0, 64, 16, 48);
-}
-
-#PanelUI-panic-warning {
-  color: #C11F14;
-  text-align: center;
-  width: 100%;
-  margin-top: 20px;
-}
-
-#PanelUI-panic-view-button {
-  -moz-appearance: none;
-  background-color: #d92316;
-  color: white;
-  margin: 5px 15px 11px;
-  border: 1px solid #c92014;
-  border-radius: 3px;
-  padding: 10px;
-}
-
-#PanelUI-panic-view-button:hover {
-  background-color: #bf1f13;
-  border-color: #b81d12;
-}
-
-#PanelUI-panic-view-button:hover:active {
-  background-color: #99180f;
-  border-color: #91170f;
-}
-
-#PanelUI-panic-view-button > .toolbarbutton-text {
-  text-align: center;
-  text-shadow: none;
-}
-
-#panic-button-success-closebutton {
-  background-color: #e5e5e5;
-  color: black;
-  margin: 5px 0 0;
-  border: 1px solid #ccc;
-  border-radius: 3px;
-  padding: 10px;
-  -moz-appearance: none;
-}
-
-#panic-button-success-closebutton:hover {
-  background-color: #dedede;
-  border-color: #bbb;
-}
-
-#panic-button-success-closebutton:hover:active {
-  background-color: #d0d0d0;
-  border-color: #aaa;
-}
-
-@media (min-resolution: 1.1dppx) {
-  #PanelUI-help[panel-multiview-anchor="true"]::after,
-  toolbarbutton[panel-multiview-anchor="true"] {
-    background-image: url(chrome://browser/skin/customizableui/subView-arrow-back-inverted@2x.png),
-                      linear-gradient(rgba(255,255,255,0.3), transparent);
-    background-size: 16px, auto;
-  }
-
-  #PanelUI-help[panel-multiview-anchor="true"]:-moz-locale-dir(rtl)::after,
-  toolbarbutton[panel-multiview-anchor="true"]:-moz-locale-dir(rtl) {
-    background-image: url(chrome://browser/skin/customizableui/subView-arrow-back-inverted-rtl@2x.png),
-                      linear-gradient(rgba(255,255,255,0.3), transparent);
-  }
-
-  #PanelUI-update-status {
-    list-style-image: url(chrome://branding/content/icon32.png);
-  }
-
-  #PanelUI-fxa-label,
-  #PanelUI-fxa-icon {
-    list-style-image: url(chrome://browser/skin/sync-horizontalbar@2x.png);
-  }
-
-  #PanelUI-fxa-icon[syncstatus="active"]:not([disabled]) {
-    list-style-image: url(chrome://browser/skin/syncProgress-horizontalbar@2x.png);
-  }
-
-  #PanelUI-customize {
-    list-style-image: url(chrome://browser/skin/menuPanel-customize@2x.png);
-  }
-
-  #customization-panelHolder #PanelUI-customize {
-    list-style-image: url(chrome://browser/skin/customizableui/menuPanel-customizeFinish@2x.png);
-  }
-
-  #PanelUI-help {
-    list-style-image: url(chrome://browser/skin/menuPanel-help@2x.png);
-  }
-
-  #PanelUI-quit {
-    list-style-image: url(chrome://browser/skin/menuPanel-exit@2x.png);
-  }
-
-  #PanelUI-fxa-label,
-  #PanelUI-fxa-icon,
-  #PanelUI-customize,
-  #PanelUI-help,
-  #PanelUI-quit {
-    -moz-image-region: rect(0, 32px, 32px, 0);
-  }
-
-  #PanelUI-update-status > .toolbarbutton-icon,
-  #PanelUI-fxa-label > .toolbarbutton-icon,
-  #PanelUI-fxa-icon > .toolbarbutton-icon,
-  #PanelUI-customize > .toolbarbutton-icon,
-  #PanelUI-help > .toolbarbutton-icon,
-  #PanelUI-quit > .toolbarbutton-icon {
-    width: 16px;
-  }
-
-  #PanelUI-customize:hover,
-  #PanelUI-help:not([disabled]):hover,
-  #PanelUI-quit:not([disabled]):hover {
-    -moz-image-region: rect(0, 64px, 32px, 32px);
-  }
-
-  #PanelUI-customize:hover:active,
-  #PanelUI-help:not([disabled]):hover:active,
-  #PanelUI-quit:not([disabled]):hover:active {
-    -moz-image-region: rect(0, 96px, 32px, 64px);
-  }
-
-  #PanelUI-help[panel-multiview-anchor="true"] {
-    -moz-image-region: rect(0, 128px, 32px, 96px);
-    background-size: auto;
-  }
-
-  .subviewbutton[checked="true"] {
-    background-image: url("chrome://global/skin/menu/shared-menu-check@2x.png");
-  }
-
-  #panic-button-success-icon,
-  #PanelUI-panic-timeframe-icon {
-    list-style-image: url(chrome://browser/skin/panic-panel/header@2x.png);
-  }
-
-  #PanelUI-panic-timeframe-icon-small {
-    list-style-image: url(chrome://browser/skin/panic-panel/header-small@2x.png);
-  }
-
-  #PanelUI-panic-actionlist-cookies {
-    background-image: -moz-image-rect(url(chrome://browser/skin/panic-panel/icons@2x.png), 0, 32, 32, 0);
-  }
-
-  #PanelUI-panic-actionlist-history {
-    background-image: -moz-image-rect(url(chrome://browser/skin/panic-panel/icons@2x.png), 0, 64, 32, 32);
-  }
-
-  #PanelUI-panic-actionlist-windows {
-    background-image: -moz-image-rect(url(chrome://browser/skin/panic-panel/icons@2x.png), 0, 96, 32, 64);
-  }
-
-  #PanelUI-panic-actionlist-newwindow {
-    background-image: -moz-image-rect(url(chrome://browser/skin/panic-panel/icons@2x.png), 0, 128, 32, 96);
-  }
-}
diff --git a/browser/themes/shared/customizableui/panelarrow-customizeTip.png b/browser/themes/shared/customizableui/panelarrow-customizeTip.png
deleted file mode 100644
index cbdf4692b..000000000
--- a/browser/themes/shared/customizableui/panelarrow-customizeTip.png
+++ /dev/null
diff --git a/browser/themes/shared/customizableui/panelarrow-customizeTip@2x.png b/browser/themes/shared/customizableui/panelarrow-customizeTip@2x.png
deleted file mode 100644
index cfd7ba966..000000000
--- a/browser/themes/shared/customizableui/panelarrow-customizeTip@2x.png
+++ /dev/null
diff --git a/browser/themes/shared/customizableui/subView-arrow-back-inverted-rtl.png b/browser/themes/shared/customizableui/subView-arrow-back-inverted-rtl.png
deleted file mode 100644
index cf4198c60..000000000
--- a/browser/themes/shared/customizableui/subView-arrow-back-inverted-rtl.png
+++ /dev/null
diff --git a/browser/themes/shared/customizableui/subView-arrow-back-inverted-rtl@2x.png b/browser/themes/shared/customizableui/subView-arrow-back-inverted-rtl@2x.png
deleted file mode 100644
index bb250403d..000000000
--- a/browser/themes/shared/customizableui/subView-arrow-back-inverted-rtl@2x.png
+++ /dev/null
diff --git a/browser/themes/shared/customizableui/subView-arrow-back-inverted.png b/browser/themes/shared/customizableui/subView-arrow-back-inverted.png
deleted file mode 100644
index 86178abfe..000000000
--- a/browser/themes/shared/customizableui/subView-arrow-back-inverted.png
+++ /dev/null
diff --git a/browser/themes/shared/customizableui/subView-arrow-back-inverted@2x.png b/browser/themes/shared/customizableui/subView-arrow-back-inverted@2x.png
deleted file mode 100644
index 1c8e86db3..000000000
--- a/browser/themes/shared/customizableui/subView-arrow-back-inverted@2x.png
+++ /dev/null
diff --git a/browser/themes/shared/devedition.inc.css b/browser/themes/shared/devedition.inc.css
deleted file mode 100644
index a5c0db948..000000000
--- a/browser/themes/shared/devedition.inc.css
+++ /dev/null
@@ -1,311 +0,0 @@
-% This Source Code Form is subject to the terms of the Mozilla Public
-% License, v. 2.0. If a copy of the MPL was not distributed with this
-% file, You can obtain one at http://mozilla.org/MPL/2.0/.
-
-/* devedition.css is loaded in browser.xul after browser.css when it is
-   preffed on.  The bulk of the styling is here in the shared file, but
-   there are overrides for each platform in their devedition.css files. */
-
-:root {
-  --tab-toolbar-navbar-overlap: 0px;
-  --navbar-tab-toolbar-highlight-overlap: 0px;
-  --space-above-tabbar: 0px;
-  --toolbarbutton-text-shadow: none;
-  --backbutton-urlbar-overlap: 0px;
-}
-
-:root[devtoolstheme="dark"] {
-  /* Chrome */
-  --chrome-background-color: #272b35;
-  --chrome-color: #F5F7FA;
-  --chrome-secondary-background-color: #393F4C;
-  --chrome-navigator-toolbox-separator-color: rgba(0,0,0,.2);
-  --chrome-nav-bar-separator-color: rgba(0,0,0,.2);
-  --chrome-nav-buttons-background: #252C33;
-  --chrome-nav-buttons-hover-background: #1B2127;
-  --chrome-nav-bar-controls-border-color: #1D2328;
-  --chrome-selection-color: #fff;
-  --chrome-selection-background-color: #5675B9;
-
-  /* Tabs */
-  --tabs-toolbar-color: #F5F7FA;
-  --tab-background-color: #272b35;
-  --tab-hover-background-color: #07090a;
-  --tab-selection-color: #f5f7fa;
-  --tab-selection-background-color: #5675B9;
-  --tab-selection-box-shadow: none;
-  --pinned-tab-glow: radial-gradient(22px at center calc(100% - 2px), rgba(76,158,217,0.9) 13%, rgba(0,0,0,0.4) 16%, transparent 70%);
-
-  /* Url and search bars */
-  --url-and-searchbar-background-color: #171B1F;
-  --urlbar-separator-color: #5F6670;
-  --urlbar-dropmarker-url: url("chrome://browser/skin/devedition/urlbar-history-dropmarker.svg");
-  --urlbar-dropmarker-region: rect(0px, 11px, 14px, 0px);
-  --urlbar-dropmarker-hover-region: rect(0, 22px, 14px, 11px);
-  --urlbar-dropmarker-active-region: rect(0px, 33px, 14px, 22px);
-  --urlbar-dropmarker-2x-url: url("chrome://browser/skin/devedition/urlbar-history-dropmarker.svg");
-  --urlbar-dropmarker-2x-region: rect(0px, 11px, 14px, 0px);
-  --urlbar-dropmarker-hover-2x-region: rect(0, 22px, 14px, 11px);
-  --urlbar-dropmarker-active-2x-region: rect(0px, 33px, 14px, 22px);
-}
-
-/* Override the lwtheme-specific styling for toolbar buttons */
-:root[devtoolstheme="dark"],
-:root[devtoolstheme="dark"] toolbar:-moz-lwtheme {
-  --toolbarbutton-hover-background: rgba(25,33, 38,.6) linear-gradient(rgba(25,33,38,.6), rgba(25,33,38,.6)) padding-box;
-  --toolbarbutton-hover-boxshadow: none;
-  --toolbarbutton-hover-bordercolor: rgba(25,33,38,.6);
-  --toolbarbutton-active-background: rgba(25,33,38,1) linear-gradient(rgba(25,33,38,1), rgba(25,33,38,1)) border-box;
-  --toolbarbutton-active-boxshadow: none;
-  --toolbarbutton-active-bordercolor: rgba(25,33,38,.8);
-  --toolbarbutton-checkedhover-backgroundcolor: #3C5283;
-
-}
-
-:root[devtoolstheme="light"] {
-  --url-and-searchbar-background-color: #fff;
-
-  --chrome-background-color: #E3E4E6;
-  --chrome-color: #18191a;
-  --chrome-secondary-background-color: #f5f6f7;
-  --chrome-navigator-toolbox-separator-color: #cccccc;
-  --chrome-nav-bar-separator-color: #B6B6B8;
-  --chrome-nav-buttons-background: #ffffff; /* --theme-body-background */
-  --chrome-nav-buttons-hover-background: #DADBDB;
-  --chrome-nav-bar-controls-border-color: #ccc;
-  --chrome-selection-color: #f5f7fa;
-  --chrome-selection-background-color: #4c9ed9;
-
-  --tab-background-color: #E3E4E6;
-  --tab-hover-background-color: #D7D8DA;
-  --tab-selection-color: #f5f7fa;
-  --tab-selection-background-color: #4c9ed9;
-  --tab-selection-box-shadow: none;
-  --pinned-tab-glow: radial-gradient(22px at center calc(100% - 2px), rgba(76,158,217,0.9) 13%, transparent 16%);
-}
-
-/* Override the lwtheme-specific styling for toolbar buttons */
-:root[devtoolstheme="light"],
-:root[devtoolstheme="light"] toolbar:-moz-lwtheme {
-  --toolbarbutton-hover-background: #eaeaea;
-  --toolbarbutton-hover-boxshadow: none;
-  --toolbarbutton-hover-bordercolor: rgba(0,0,0,0.1);
-  --toolbarbutton-active-background: #d7d7d8 border-box;
-  --toolbarbutton-active-boxshadow: none;
-  --toolbarbutton-active-bordercolor: rgba(0,0,0,0.15);
-  --toolbarbutton-checkedhover-backgroundcolor: #d7d7d8;
-}
-
-/* Give some space to drag the window around while customizing
-   (normal space to left and right of tabs doesn't work in this case) */
-#main-window[tabsintitlebar][customizing] {
-  --space-above-tabbar: 9px;
-}
-
-/* Override @tabCurveHalfWidth@ and @tabCurveWidth@.  XXX: Switch to a CSS variable once the perf is sorted out - bug 1088771 */
-.tab-background-middle {
-  border-left-width: 0;
-  border-right-width: 0;
-  margin: 0;
-}
-
-.tab-background,
-.tabs-newtab-button {
-  margin-inline-end: 0;
-  margin-inline-start: 0;
-}
-
-.tabbrowser-arrowscrollbox > .arrowscrollbox-scrollbox {
-  padding-inline-end: 0;
-  padding-inline-start: 0;
-}
-
-.tab-background-start[selected=true]::after,
-.tab-background-start[selected=true]::before,
-.tab-background-start,
-.tab-background-end,
-.tab-background-end[selected=true]::after,
-.tab-background-end[selected=true]::before {
-  width: 0;
-}
-
-.tab-background-start[selected=true]::after,
-.tab-background-end[selected=true]::after {
-  margin-inline-start: 0;
-}
-/* End override @tabCurveHalfWidth@ and @tabCurveWidth@ */
-
-#urlbar ::-moz-selection,
-#navigator-toolbox .searchbar-textbox ::-moz-selection,
-.browserContainer > findbar ::-moz-selection {
-  background-color: var(--chrome-selection-background-color);
-  color: var(--chrome-selection-color);
-}
-
-/* Change the base colors for the browser chrome */
-
-#tabbrowser-tabs,
-#TabsToolbar,
-#browser-panel {
-  background: var(--chrome-background-color);
-  color: var(--chrome-color);
-}
-
-#navigator-toolbox:-moz-lwtheme::after {
-  border-bottom-color: var(--chrome-navigator-toolbox-separator-color);
-}
-
-#navigator-toolbox > toolbar:not(#TabsToolbar):not(#toolbar-menubar),
-.browserContainer > findbar,
-#browser-bottombox {
-  background-color: var(--chrome-secondary-background-color) !important;
-  background-image: none !important;
-  color: var(--chrome-color);
-}
-
-/* Default findbar text color doesn't look good - Bug 1125677 */
-.browserContainer > findbar .findbar-find-status,
-.browserContainer > findbar .found-matches {
-  color: inherit;
-}
-
-#navigator-toolbox .toolbarbutton-1,
-.browserContainer > findbar .findbar-button,
-#PlacesToolbar toolbarbutton.bookmark-item {
-  color: var(--chrome-color);
-  text-shadow: var(--toolbarbutton-text-shadow);
-}
-
-/* Using toolbar[brighttext] instead of important to override linux */
-toolbar[brighttext] #downloads-indicator-counter {
-  text-shadow: var(--toolbarbutton-text-shadow);
-  color: var(--chrome-color);
-}
-
-#TabsToolbar {
-  text-shadow: none !important;
-}
-
-/* URL bar and search bar*/
-#urlbar,
-#navigator-toolbox .searchbar-textbox {
-  background-color: var(--url-and-searchbar-background-color) !important;
-  background-image: none !important;
-  color: inherit !important;
-  border: 1px solid var(--chrome-nav-bar-controls-border-color) !important;
-  box-shadow: none !important;
-}
-
-%filter substitution
-%define selectorPrefix :root[devtoolstheme="dark"] 
-%define selectorSuffix :-moz-lwtheme
-%define iconVariant -white
-%include identity-block/icons.inc.css
-
-#urlbar {
-  border-inline-start: none !important;
-  opacity: 1 !important;
-}
-
-window:not([chromehidden~="toolbar"]) #urlbar-wrapper {
-  overflow: -moz-hidden-unscrollable;
-  clip-path: none;
-  margin-inline-start: 0;
-}
-
-:root[devtoolstheme="dark"] #urlbar-zoom-button:hover {
-  background-color: rgba(255,255,255,.2);
-}
-
-:root[devtoolstheme="dark"] #urlbar-zoom-button:hover:active {
-  background-color: rgba(255,255,255,.3);
-}
-
-/* Nav bar specific stuff */
-#nav-bar {
-  margin-top: 0 !important;
-  border-top: none !important;
-  border-bottom: none !important;
-  border-radius: 0 !important;
-  box-shadow: 0 -1px var(--chrome-nav-bar-separator-color) !important;
-}
-
-/* No extra vertical padding for nav bar */
-#nav-bar-customization-target,
-#nav-bar {
-  padding-top: 0;
-  padding-bottom: 0;
-}
-
-/* Use smaller back button icon */
-#back-button {
-  -moz-image-region: rect(0, 54px, 18px, 36px);
-}
-
-@media (min-resolution: 1.1dppx) {
-  #back-button {
-    -moz-image-region: rect(0, 108px, 36px, 72px);
-  }
-}
-
-.tab-background {
-  visibility: hidden;
-}
-
-/* Tab separators */
-.tabbrowser-tab::after,
-.tabbrowser-tab::before {
-  background: currentColor;
-  opacity: 0.2 !important;
-}
-
-.tabbrowser-arrowscrollbox > .scrollbutton-down,
-.tabbrowser-arrowscrollbox > .scrollbutton-up {
-  background-color: var(--tab-background-color);
-  border-color: transparent;
-}
-
-.tabbrowser-tab {
-  /* We normally rely on other tab elements for pointer events, but this
-     theme hides those so we need it set here instead */
-  pointer-events: auto;
-}
-
-.tabbrowser-tab:-moz-any([image], [pinned]) > .tab-stack > .tab-content[attention]:not([selected="true"]),
-.tabbrowser-tab > .tab-stack > .tab-content[pinned][titlechanged]:not([selected="true"]) {
-  background-image: var(--pinned-tab-glow);
-  background-position: center;
-  background-size: 100%;
-}
-
-.tabbrowser-tab[image] > .tab-stack > .tab-content[attention]:not([pinned]):not([selected="true"]) {
-  background-position: left bottom var(--tab-toolbar-navbar-overlap);
-  background-size: 34px 100%;
-}
-
-.tabbrowser-arrowscrollbox > .scrollbutton-down:not([disabled]):hover,
-.tabbrowser-arrowscrollbox > .scrollbutton-up:not([disabled]):hover,
-.tabbrowser-tab:hover {
-  background-color: var(--tab-hover-background-color);
-}
-
-.tabbrowser-tab[visuallyselected] {
-  color: var(--tab-selection-color) !important; /* Override color: inherit */
-  background-color: var(--tab-selection-background-color);
-}
-
-.tab-icon-sound[soundplaying],
-.tab-icon-sound[muted] {
-  filter: url(chrome://browser/skin/filters.svg#fill) !important; /* removes drop-shadow filter */
-}
-
-/* Don't need space for the tab curves (66px - 30px) */
-.tabs-newtab-button {
-  width: 36px;
-}
-
-.tabs-newtab-button:hover {
-  /* Important needed because !important is used in browser.css */
-  background-color: var(--tab-hover-background-color) !important;
-  background-image: none;
-}
diff --git a/browser/themes/shared/devedition/urlbar-history-dropmarker.svg b/browser/themes/shared/devedition/urlbar-history-dropmarker.svg
deleted file mode 100644
index 115fbf127..000000000
--- a/browser/themes/shared/devedition/urlbar-history-dropmarker.svg
+++ /dev/null
@@ -1,22 +0,0 @@
-<!-- This Source Code Form is subject to the terms of the Mozilla Public
-   - License, v. 2.0. If a copy of the MPL was not distributed with this
-   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
-<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width="33" height="14" viewBox="0 0 33 14">
-  <defs>
-    <polygon points="0,0 5.5,7 11,0" id="dropmarker-shape"/>
-  </defs>
-  <style>
-    use {
-      fill: #b6babf;
-    }
-    .hover {
-      fill: #61bdeb;
-    }
-    .active {
-      fill: #39ace6;
-    }
-  </style>
-  <use xlink:href="#dropmarker-shape" style="transform: translate(0, 4px)"/>
-  <use xlink:href="#dropmarker-shape" style="transform: translate(11px, 4px)" class="hover"/>
-  <use xlink:href="#dropmarker-shape" style="transform: translate(22px, 4px)" class="active"/>
-</svg>
diff --git a/browser/themes/shared/downloads/allDownloadsViewOverlay.inc.css b/browser/themes/shared/downloads/allDownloadsViewOverlay.inc.css
deleted file mode 100644
index bdb8b7df8..000000000
--- a/browser/themes/shared/downloads/allDownloadsViewOverlay.inc.css
+++ /dev/null
@@ -1,131 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-%filter substitution
-
-%define item richlistitem.download
-%define itemFocused @item@[selected]
-
-/*** View and outer controls ***/
-
-#downloadsRichListBox {
-  /** The default listbox appearance comes with an unwanted margin. **/
-  -moz-appearance: none;
-  margin: 0;
-}
-
-/*** List items ***/
-
-#downloadsRichListBox > richlistitem.download {
-  height: var(--downloads-item-height);
-}
-
-.downloadTypeIcon {
-  margin: 8px 13px;
-  width: 32px;
-  height: 32px;
-}
-
-.downloadBlockedBadge {
-  margin: 0 5px;
-  background: url("chrome://browser/skin/downloads/download-blocked.svg") top right / 16px no-repeat;
-}
-
-.downloadBlockedBadge:-moz-locale-dir(rtl) {
-  background-position-x: left;
-}
-
-@item@[verdict="PotentiallyUnwanted"] .downloadBlockedBadge {
-  background-image: url("chrome://browser/skin/warning.svg");
-}
-
-@item@[verdict="Uncommon"] .downloadBlockedBadge {
-  background-image: url("chrome://browser/skin/info.svg");
-}
-
-@item@ > toolbarseparator {
-  display: none;
-}
-
-.downloadTarget {
-  margin: 0;
-}
-
-.downloadDetails {
-  opacity: 0.7;
-  font-size: 95%;
-  /* Use calc() to keep the height consistent with .downloadTarget, so that the
-     progress bar can be vertically centered. */
-  margin: 4px 0 calc(1em / 0.95 - 1em);
-}
-
-.downloadButton {
-  -moz-appearance: none;
-  -moz-box-align: center;
-  background: transparent;
-  min-width: 0;
-  min-height: 0;
-  margin: 0;
-  border: none;
-  color: inherit;
-  padding: 0 18px;
-}
-
-.downloadButton > .button-box {
-  -moz-appearance: none;
-  padding: 2px !important;
-  border-radius: 50%;
-}
-
-.downloadButton > .button-box > .button-icon {
-  width: 16px;
-  height: 16px;
-  margin: 0;
-  filter: url("chrome://browser/skin/filters.svg#fill");
-  fill: currentColor;
-}
-
-.downloadButton > .button-box > .button-text {
-  display: none;
-}
-
-.downloadButton:hover > .button-box {
-  background-color: graytext;
-  color: -moz-field;
-}
-
-.downloadButton:hover:active > .button-box {
-  background-color: -moz-fieldtext;
-}
-
-@itemFocused@ > .downloadButtonArea > .downloadButton:hover > .button-box {
-  background-color: HighlightText;
-  color: Highlight;
-}
-
-@itemFocused@ > .downloadButtonArea > .downloadButton:hover:active > .button-box {
-  background-color: -moz-field;
-  color: -moz-fieldtext;
-}
-
-/*** Button icons ***/
-
-.downloadIconCancel > .button-box > .button-icon {
-  list-style-image: url("chrome://browser/skin/panel-icons.svg#cancel");
-}
-
-.downloadIconShow > .button-box > .button-icon {
-%ifdef XP_MACOSX
-  list-style-image: url("chrome://browser/skin/panel-icons.svg#magnifier");
-%else
-  list-style-image: url("chrome://browser/skin/panel-icons.svg#folder");
-%endif
-}
-
-.downloadIconRetry > .button-box > .button-icon {
-  list-style-image: url("chrome://browser/skin/panel-icons.svg#retry");
-}
-
-/*** Progressmeter ***/
-%include progressmeter.inc.css
diff --git a/browser/themes/shared/downloads/contentAreaDownloadsView.css b/browser/themes/shared/downloads/contentAreaDownloadsView.css
deleted file mode 100644
index aef7df1d9..000000000
--- a/browser/themes/shared/downloads/contentAreaDownloadsView.css
+++ /dev/null
@@ -1,31 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-@import url("chrome://global/skin/in-content/common.css");
-
-#contentAreaDownloadsView {
-  padding: 18px;
-}
-
-#downloadsRichListBox:empty {
-  border-color: transparent;
-  background-color: transparent;
-}
-
-.downloadButton:not([disabled="true"]):hover,
-.downloadButton:not([disabled="true"]):hover:active,
-.downloadButton:not([disabled]):hover:active {
-  background: transparent;
-  border: none;
-}
-
-.downloadButton > .button-box {
-  padding-bottom: 0;
-}
-
-#downloadsListEmptyDescription {
-  margin: 1em;
-  text-align: center;
-  color: GrayText;
-}
diff --git a/browser/themes/shared/downloads/download-blocked.svg b/browser/themes/shared/downloads/download-blocked.svg
deleted file mode 100644
index e73efe99e..000000000
--- a/browser/themes/shared/downloads/download-blocked.svg
+++ /dev/null
@@ -1,17 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!-- This Source Code Form is subject to the terms of the Mozilla Public
-   - License, v. 2.0. If a copy of the MPL was not distributed with this
-   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
-<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width="16" height="16" viewBox="0 0 16 16">
-  <style>
-    circle {
-      fill: #D92215;
-    }
-    rect {
-      fill: #fff;
-    }
-  </style>
-
-  <circle cx="8" cy="8" r="8" />
-  <rect x="3" y="6" width="10" height="4" rx=".5" ry=".5" />
-</svg>
diff --git a/browser/themes/shared/downloads/download-summary.svg b/browser/themes/shared/downloads/download-summary.svg
deleted file mode 100644
index c10ee95fc..000000000
--- a/browser/themes/shared/downloads/download-summary.svg
+++ /dev/null
@@ -1,11 +0,0 @@
-<?xml version="1.0"?>
-<!-- This Source Code Form is subject to the terms of the Mozilla Public
-   - License, v. 2.0. If a copy of the MPL was not distributed with this
-   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
-<svg xmlns="http://www.w3.org/2000/svg"
-     width="32" height="32" viewBox="0 0 32 32">
-  <path fill="#fff" d="M26.2,31.4H6.8c-1.8,0-3.4-1.5-3.4-3.3V3.8c0-1.8,1.6-3.3,3.4-3.3H23l5.6,6.4V28C28.7,29.9,28,31.4,26.2,31.4z" />
-  <path fill="#939393" d="M26.2,31.9H6.8c-2,0-3.8-1.7-3.8-3.8V3.8C3,1.7,4.8,0,6.8,0h16.4L29,6.7v21.4C29,30.2,28.2,31.9,26.2,31.9z M6.8,1C5.2,1,4,2.3,4,3.8V28c0,1.6,1.4,3,2.9,3h19.2c1.6,0,2-1.5,2-3V7.1L22.7,1C22.7,1,6.8,1,6.8,1z" />
-  <path fill="#4c4c4c" d="M22.5,18.2L17,23.6c-0.3,0.3-0.6,0.4-1.1,0.4c-0.3,0-0.8-0.1-1.1-0.4l-5.5-5.4c-0.5-0.5-0.4-1.1,0.4-1.1H13 v-5.9c0-0.5,0.4-1,1-1h3.9c0.5,0,1,0.4,1,1v5.9h3.1C22.8,17.2,23,17.6,22.5,18.2z" />
-  <polygon fill="#939393" points="27,9 21,9 21,1.9 22,1.9 22,8 27,8" />
-</svg>
diff --git a/browser/themes/shared/downloads/downloads.inc.css b/browser/themes/shared/downloads/downloads.inc.css
deleted file mode 100644
index b4d670648..000000000
--- a/browser/themes/shared/downloads/downloads.inc.css
+++ /dev/null
@@ -1,372 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-%filter substitution
-
-%define keyfocus #downloadsPanel[keyfocus]
-%define notKeyfocus #downloadsPanel:not([keyfocus])
-%define item richlistitem[type="download"]
-%define itemFinished @item@[state="1"]
-%define itemNotFinished @item@:not([state="1"])
-%define itemFocused #downloadsListBox:focus > @item@[selected]
-
-/*** Panel and outer controls ***/
-
-#downloadsPanel > .panel-arrowcontainer > .panel-arrowcontent {
-  overflow: hidden;
-  display: block;
-}
-
-#downloadsPanel > .panel-arrowcontainer > .panel-arrowcontent,
-#downloadsPanel-multiView > .panel-viewcontainer > .panel-viewstack > .panel-subviews {
-  padding: 0;
-}
-
-#downloadsListBox {
-  background: transparent;
-  color: inherit;
-  -moz-appearance: none;
-  margin: 0;
-}
-
-#emptyDownloads {
-  padding: 16px 25px;
-  margin: 0;
-  /* The panel can be wider than this description after the blocked subview is
-     shown, so center the text. */
-  text-align: center;
-}
-
-.downloadsPanelFooter {
-  background-color: var(--arrowpanel-dimmed);
-  border-top: 1px solid var(--panel-separator-color);
-}
-
-.downloadsPanelFooter toolbarseparator,
-@item@ > toolbarseparator {
-  margin: 0;
-  border: 0;
-  min-width: 0;
-  border-left: 1px solid var(--panel-separator-color);
-  -moz-appearance: none;
-}
-
-.downloadsPanelFooterButton {
-  -moz-appearance: none;
-  background-color: transparent;
-  color: inherit;
-  margin: 0;
-  padding: 0;
-  min-width: 0;
-  min-height: 40px;
-  border: none;
-}
-
-.downloadsPanelFooterButton:hover {
-  outline: 1px solid var(--arrowpanel-dimmed);
-  background-color: var(--arrowpanel-dimmed);
-}
-
-.downloadsPanelFooterButton:hover:active,
-.downloadsPanelFooterButton[open="true"] {
-  outline: 1px solid var(--arrowpanel-dimmed-further);
-  background-color: var(--arrowpanel-dimmed-further);
-  box-shadow: 0 1px 0 hsla(210,4%,10%,.05) inset;
-}
-
-.downloadsPanelFooterButton[default] {
-  background-color: #0996f8;
-  color: white;
-}
-
-.downloadsPanelFooterButton[default]:hover {
-  background-color: #0675d3;
-}
-
-.downloadsPanelFooterButton[default]:hover:active {
-  background-color: #0568ba;
-}
-
-.downloadsPanelFooterButton > .button-box {
-  padding: 0;
-  margin: 0;
-  border: none;
-}
-
-#downloadsHistory {
-  padding-inline-start: 10px;
-  padding-inline-end: 10px;
-}
-
-#downloadsPanel[hasdownloads] #downloadsFooterButtons:not(.downloadsHideDropmarker) > #downloadsHistory {
-  padding-inline-start: 68px;
-}
-
-toolbarseparator.downloadsDropmarkerSplitter {
-  margin: 7px 0;
-}
-
-@item@ > toolbarseparator {
-  margin: 10px 0;
-}
-
-@item@:hover > toolbarseparator,
-#downloadsFooter:hover toolbarseparator.downloadsDropmarkerSplitter,
-#downloadsFooter[showingdropdown] toolbarseparator {
-  margin: 0;
-}
-
-.downloadsDropmarker {
-  padding: 0 21px;
-}
-
-.downloadsDropmarker > .button-box > hbox {
-  display: none;
-}
-
-.downloadsDropmarker > .button-box > .button-menu-dropmarker {
-  /* This is to override the linux !important */
-  -moz-appearance: none !important;
-  display: -moz-box;
-  padding: 0;
-  margin: 0;
-}
-
-.downloadsDropmarker > .button-box > .button-menu-dropmarker > .dropmarker-icon {
-  width: 16px;
-  height: 16px;
-  list-style-image: url("chrome://browser/skin/downloads/menubutton-dropmarker.svg");
-  filter: url("chrome://browser/skin/filters.svg#fill");
-  fill: currentColor;
-}
-
-/* Override default icon size which is too small for this dropdown */
-.downloadsDropmarker > .button-box > .button-menu-dropmarker {
-  width: 16px;
-  height: 16px;
-}
-
-#downloadsSummary {
-  -moz-user-focus: normal;
-}
-
-#downloadsSummary > .downloadTypeIcon {
-  list-style-image: url("chrome://browser/skin/downloads/download-summary.svg");
-}
-
-#downloadsSummaryDescription {
-  color: -moz-nativehyperlinktext;
-}
-
-/*** List items and similar elements in the summary ***/
-
-#downloadsSummary,
-richlistitem[type="download"] {
-  height: var(--downloads-item-height);
-}
-
-richlistitem[type="download"] {
-  border-bottom: 1px solid var(--panel-separator-color);
-  background: transparent;
-  color: inherit;
-}
-
-richlistitem[type="download"]:last-child {
-  border-bottom: none;
-}
-
-.downloadTypeIcon {
-  margin: 8px 13px;
-  width: 32px;
-  height: 32px;
-}
-
-.downloadBlockedBadge {
-  margin: 0 5px;
-  background: url("chrome://browser/skin/downloads/download-blocked.svg") top right / 16px no-repeat;
-}
-
-.downloadBlockedBadge:-moz-locale-dir(rtl) {
-  background-position-x: left;
-}
-
-@item@[verdict="PotentiallyUnwanted"] .downloadBlockedBadge {
-  background-image: url("chrome://browser/skin/warning.svg");
-}
-
-@item@[verdict="Uncommon"] .downloadBlockedBadge {
-  background-image: url("chrome://browser/skin/info.svg");
-}
-
-/* We hold .downloadTarget, .downloadProgress and .downloadDetails inside of
-   a vbox with class .downloadContainer. We set the font-size of the entire
-   container to --downloads-item-font-size-factor because:
-
-   1) This is the size that we want .downloadDetails to be
-   2) The container's width is set by localizers by &downloadDetails.width;,
-      which is a ch unit. Since this is the value that should control the
-      panel width, we apply it to the outer container to constrain
-      .downloadTarget and .downloadProgress.
-
-   Finally, since we want .downloadTarget's font-size to be at 100% of the
-   font-size of .downloadContainer's parent, we use calc to go from the
-   smaller font-size back to the original font-size.
- */
-.downloadContainer {
-  font-size: calc(100% * var(--downloads-item-font-size-factor));
-  margin-inline-end: 13px;
-}
-
-#downloadsSummaryDescription,
-.downloadTarget {
-  margin: 0;
-  font-size: calc(100% / var(--downloads-item-font-size-factor));
-}
-
-#downloadsSummaryDetails,
-.downloadDetails {
-  opacity: var(--downloads-item-details-opacity);
-  /* Use calc() to keep the height consistent with .downloadTarget, so that the
-     progress bar can be vertically centered. */
-  margin: 4px 0 calc(1em / var(--downloads-item-font-size-factor) - 1em);
-}
-
-@item@[verdict] > toolbarseparator {
-  visibility: hidden;
-}
-
-.downloadButton {
-  -moz-appearance: none;
-  min-width: 58px;
-  margin: 0;
-  border: none;
-  background: transparent;
-  padding: 0;
-  color: inherit;
-}
-
-.downloadButton > .button-box > .button-icon {
-  width: 16px;
-  height: 16px;
-  margin: 1px;
-  filter: url("chrome://browser/skin/filters.svg#fill");
-  fill: currentColor;
-}
-
-.downloadButton > .button-box > .button-text {
-  margin: 0 !important;
-  padding: 0;
-}
-
-@itemFinished@[exists] .downloadMainArea:hover,
-@item@:not([verdict]) > .downloadButtonArea:hover,
-@item@[verdict]:hover {
-  background-color: var(--arrowpanel-dimmed);
-}
-
-@itemFinished@[exists] > .downloadMainArea:hover:active,
-@item@:not([verdict]) > .downloadButtonArea:hover:active,
-@item@[verdict]:hover:active {
-  background-color: var(--arrowpanel-dimmed-further);
-}
-
-@item@[showingsubview] {
-  background-color: Highlight;
-  color: HighlightText;
-  transition: background-color var(--panelui-subview-transition-duration),
-              color var(--panelui-subview-transition-duration);
-}
-
-@item@[verdict="Malware"]:hover,
-@item@[verdict="Malware"]:hover:active,
-@item@[verdict="Malware"][showingsubview] {
-  background-color: #aa1b08;
-  color: white;
-}
-
-/*** Button icons ***/
-
-.downloadIconCancel > .button-box > .button-icon {
-  list-style-image: url("chrome://browser/skin/panel-icons.svg#cancel");
-}
-
-.downloadIconShow > .button-box > .button-icon {
-%ifdef XP_MACOSX
-  list-style-image: url("chrome://browser/skin/panel-icons.svg#magnifier");
-%else
-  list-style-image: url("chrome://browser/skin/panel-icons.svg#folder");
-%endif
-}
-
-.downloadIconRetry > .button-box > .button-icon {
-  list-style-image: url("chrome://browser/skin/panel-icons.svg#retry");
-}
-
-.downloadShowBlockedInfo > .button-box > .button-icon {
-  list-style-image: url("chrome://browser/skin/panel-icons.svg#arrow-right");
-}
-
-.downloadShowBlockedInfo > .button-box > .button-icon:-moz-locale-dir(rtl) {
-  list-style-image: url("chrome://browser/skin/panel-icons.svg#arrow-left");
-}
-
-/*** Blocked subview ***/
-
-#downloadsPanel-multiView > .panel-viewcontainer > .panel-viewstack[viewtype=main] > .panel-subviews {
-  /* When the main view is showing, the shadow on the left edge of the subview is
-     barely visible on the right edge of the main view, so set it to none. */
-  box-shadow: none;
-}
-
-/* When the subview is showing, turn the download button into an arrow pointing
-   back to the main view. */
-#downloadsPanel-multiView > .panel-viewcontainer > .panel-viewstack[viewtype="subview"] .download-state[showingsubview] .downloadButton {
-  color: HighlightText;
-}
-
-#downloadsPanel-multiView > .panel-viewcontainer > .panel-viewstack[viewtype="subview"] .download-state[showingsubview] .downloadButton > .button-box > .button-icon {
-  list-style-image: url("chrome://browser/skin/panel-icons.svg#arrow-left");
-}
-
-#downloadsPanel-multiView > .panel-viewcontainer > .panel-viewstack[viewtype="subview"] .download-state[showingsubview] .downloadButton > .button-box > .button-icon:-moz-locale-dir(rtl) {
-  list-style-image: url("chrome://browser/skin/panel-icons.svg#arrow-right");
-}
-
-#downloadsPanel-blockedSubview {
-  background-image: url("chrome://browser/skin/warning.svg");
-  background-size: 32px 32px;
-  background-position: 16px 16px;
-  background-repeat: no-repeat;
-}
-
-#downloadsPanel-blockedSubview:-moz-locale-dir(rtl) {
-  background-position: calc(100% - 16px) 16px;
-}
-
-#downloadsPanel-blockedSubview[verdict=Malware] {
-  background-image: url("chrome://browser/skin/downloads/download-blocked.svg");
-}
-
-#downloadsPanel-blockedSubview-title {
-  margin-top: 16px;
-  margin-bottom: 16px;
-  font-size: calc(100% / var(--downloads-item-font-size-factor));
-}
-
-#downloadsPanel-blockedSubview-details1,
-#downloadsPanel-blockedSubview-details2 {
-  font-size: calc(100% * var(--downloads-item-font-size-factor));
-  margin-bottom: 16px;
-  opacity: var(--downloads-item-details-opacity);
-}
-
-#downloadsPanel-blockedSubview-title,
-#downloadsPanel-blockedSubview-details1,
-#downloadsPanel-blockedSubview-details2 {
-  -moz-margin-start: 64px;
-  -moz-margin-end: 16px;
-}
-
-/*** Progressmeter ***/
-%include progressmeter.inc.css
diff --git a/browser/themes/shared/downloads/menubutton-dropmarker.svg b/browser/themes/shared/downloads/menubutton-dropmarker.svg
deleted file mode 100644
index 76af113a7..000000000
--- a/browser/themes/shared/downloads/menubutton-dropmarker.svg
+++ /dev/null
@@ -1,8 +0,0 @@
-<?xml version="1.0"?>
-<!-- This Source Code Form is subject to the terms of the Mozilla Public
-   - License, v. 2.0. If a copy of the MPL was not distributed with this
-   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
-<svg xmlns="http://www.w3.org/2000/svg"
-     width="16" height="16" viewBox="0 0 16 16">
-  <path d="m 2,6 6,6 6,-6 -1.5,-1.5 -4.5,4.5 -4.5,-4.5 z" />
-</svg>
diff --git a/browser/themes/shared/downloads/progressmeter.inc.css b/browser/themes/shared/downloads/progressmeter.inc.css
deleted file mode 100644
index 22e780e09..000000000
--- a/browser/themes/shared/downloads/progressmeter.inc.css
+++ /dev/null
@@ -1,70 +0,0 @@
-/*** Common-styled progressmeter ***/
-.downloadProgress {
-  height: 8px;
-  border-radius: 1px;
-  margin: 4px 0 0;
-  margin-inline-end: 12px;
-
-  /* for overriding rules in progressmeter.css */
-  -moz-appearance: none;
-  border-style: none;
-  background-color: transparent;
-  min-width: initial;
-  min-height: initial;
-}
-
-.downloadProgress[mode="undetermined"] {
-  /* for overriding rules on global.css in Linux. */
-  -moz-binding: url("chrome://global/content/bindings/progressmeter.xml#progressmeter");
-}
-
-.downloadProgress > .progress-bar {
-  background-color: Highlight;
-
-  /* for overriding rules in progressmeter.css */
-  -moz-appearance: none;
-}
-
-.downloadProgress[paused="true"] > .progress-bar {
-  background-color: GrayText;
-}
-
-.downloadProgress[mode="undetermined"] > .progress-bar {
-  /* Make a white reflecting animation.
-     Create a gradient with 2 identical pattern, and enlarge the size to 200%.
-     This allows us to animate background-position with percentage. */
-  background-image: linear-gradient(90deg, transparent 0%,
-                                           rgba(255,255,255,0.5) 25%,
-                                           transparent 50%,
-                                           rgba(255,255,255,0.5) 75%,
-                                           transparent 100%);
-  background-blend-mode: lighten;
-  background-size: 200% 100%;
-  animation: downloadProgressSlideX 1.5s linear infinite;
-}
-
-.downloadProgress > .progress-remainder {
-  border: solid ButtonShadow;
-  border-block-start-width: 1px;
-  border-block-end-width: 1px;
-  border-inline-start-width: 0;
-  border-inline-end-width: 1px;
-  background-color: ButtonFace;
-}
-
-.downloadProgress[value="0"] > .progress-remainder {
-  border-width: 1px;
-}
-
-.downloadProgress > .progress-remainder[mode="undetermined"] {
-  border: none;
-}
-
-@keyframes downloadProgressSlideX {
-  0% {
-    background-position: 0 0;
-  }
-  100% {
-    background-position: -100% 0;
-  }
-}
diff --git a/browser/themes/shared/drm-icon.svg b/browser/themes/shared/drm-icon.svg
deleted file mode 100644
index db2b36df6..000000000
--- a/browser/themes/shared/drm-icon.svg
+++ /dev/null
@@ -1,38 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!-- This Source Code Form is subject to the terms of the Mozilla Public
-   - License, v. 2.0. If a copy of the MPL was not distributed with this
-   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
-<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" viewBox="0 0 16 16">
-  <style>
-    #chains {
-      fill: url(#baseGradient);
-    }
-    #chains-pressed {
-      fill: url(#pressedGradient);
-    }
-    #chains-black {
-      fill: #000;
-    }
-    use:not(:target) {
-      display: none;
-    }
-  </style>
-  <defs>
-    <linearGradient id="baseGradient" gradientUnits="userSpaceOnUse" x1="8" x2="8" y1="16" y2="0">
-      <stop offset="0" style="stop-color: #808080"/>
-      <stop offset="1" style="stop-color: #999"/>
-    </linearGradient>
-    <linearGradient id="pressedGradient" gradientUnits="userSpaceOnUse" x1="8" x2="8" y1="16" y2="0">
-      <stop offset="0" style="stop-color: #4d4d4d"/>
-      <stop offset="1" style="stop-color: #808080"/>
-    </linearGradient>
-    <g id="path">
-      <path d="M7.058,9.72c-0.245,0.245-0.62,0.27-0.834,0.056C6.01,9.562,6.035,9.186,6.28,8.942l0.218-0.218 c-0.245-0.245-0.645-0.245-0.89,0L4.496,9.836c-0.245,0.245-0.245,0.645,0,0.89l0.779,0.779c0.245,0.245,0.645,0.245,0.89,0 l1.112-1.112c0.245-0.245,0.245-0.645,0-0.89L7.058,9.72z"/>
-      <path d="M10.726,4.496c-0.245-0.245-0.645-0.245-0.89,0L8.723,5.608c-0.245,0.245-0.245,0.645,0,0.89 L8.95,6.272c0.245-0.245,0.62-0.27,0.834-0.056s0.189,0.59-0.056,0.834L9.502,7.277c0.245,0.245,0.645,0.245,0.89,0l1.112-1.112 c0.245-0.245,0.245-0.645,0-0.89L10.726,4.496z"/>
-      <path d="M8,0C3.582,0,0,3.582,0,8s3.582,8,8,8s8-3.582,8-8S12.418,0,8,0z M12.527,6.81l-1.489,1.489 c-0.631,0.631-1.663,0.631-2.293,0L8.612,8.167L8.167,8.612l0.133,0.133c0.631,0.631,0.631,1.663,0,2.293L6.81,12.527 c-0.631,0.631-1.663,0.631-2.293,0l-1.044-1.044c-0.631-0.631-0.631-1.663,0-2.293l1.489-1.489c0.631-0.631,1.663-0.631,2.293,0 l0.133,0.133l0.445-0.445L7.701,7.255c-0.631-0.631-0.631-1.663,0-2.293L9.19,3.473c0.631-0.631,1.663-0.631,2.293,0l1.044,1.044 C13.158,5.148,13.158,6.18,12.527,6.81z"/>
-    </g>
-  </defs>
-  <use xlink:href="#path" id="chains"/>
-  <use xlink:href="#path" id="chains-pressed"/>
-  <use xlink:href="#path" id="chains-black"/>
-</svg>
diff --git a/browser/themes/shared/e10s-64@2x.png b/browser/themes/shared/e10s-64@2x.png
deleted file mode 100644
index 1dc243865..000000000
--- a/browser/themes/shared/e10s-64@2x.png
+++ /dev/null
diff --git a/browser/themes/shared/error-pages.css b/browser/themes/shared/error-pages.css
deleted file mode 100644
index 0711be9c7..000000000
--- a/browser/themes/shared/error-pages.css
+++ /dev/null
@@ -1,81 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-@import url("chrome://global/skin/in-content/info-pages.css");
-
-body {
-  background-size: 64px 32px;
-  background-repeat: repeat-x;
-  /* Top padding for when the window height is small.
-     Bottom padding to keep everything centered. */
-  padding: 75px 0;
-  /* info-pages.css sets a minimum width of 13em to the content
-   * container. If we don't set a min-width here, the content
-   * gets clipped in iframes with small width. We don't accomodate
-   * any padding to prioritize real estate in the small viewport. */
-  min-width: 13em;
-}
-
-.button-container {
-  display: flex;
-  flex-flow: row wrap;
-}
-
-.button-spacer {
-  flex: 1;
-}
-
-@media only screen and (max-width: 959px) {
-  body {
-    padding: 75px 48px;
-  }
-
-  .title {
-    background-image: none !important;
-    padding-inline-start: 0;
-    margin-inline-start: 0;
-  }
-
-  .title-text {
-    padding-top: 0;
-  }
-}
-
-@media only screen and (max-width: 640px) {
-  body {
-    justify-content: unset;
-    /* Now that everything is top-aligned, we don't need the
-     * bottom padding for centering - though it's added back
-     * when the viewport height is < 480px (see below). */
-    padding: 75px 20px 0;
-  }
-
-  .title-text {
-    padding-bottom: 0;
-    border-bottom: none;
-  }
-}
-
-@media only screen and (max-width: 480px) {
-  .button-container button {
-    /* Force buttons to display: block here to try and enforce collapsing margins */
-    display: block;
-    width: 100%;
-    margin: 0.66em 0 0;
-  }
-}
-
-/* For small window height, shift the stripes up by 10px.
- * We could just change the background size, but that changes
- * the angle of the stripes so just shifting up is easier. */
-@media only screen and (max-height: 480px) {
-  body {
-    background-position: 10px -10px;
-    padding-top: 38px;
-    /* We get rid of bottom padding for width < 640px, but
-     * for height < 480px a bit of space between the content
-     * and the viewport edge is nice. */
-    padding-bottom: 38px;
-  }
-}
\ No newline at end of file
diff --git a/browser/themes/shared/favicon-search-16.svg b/browser/themes/shared/favicon-search-16.svg
deleted file mode 100644
index e839cc804..000000000
--- a/browser/themes/shared/favicon-search-16.svg
+++ /dev/null
@@ -1,10 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!-- This Source Code Form is subject to the terms of the Mozilla Public
-   - License, v. 2.0. If a copy of the MPL was not distributed with this
-   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
-<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 16 16">
-  <circle cx="8" cy="8" r="8" fill="#58bf43"/>
-  <circle cx="8" cy="8" r="7.5" stroke="#41a833" stroke-width="1" fill="none"/>
-  <path d="M12.879,12L12,12.879,9.015,9.9A4.276,4.276,0,1,1,9.9,9.015ZM6.5,3.536A2.964,2.964,0,1,0,9.464,6.5,2.964,2.964,0,0,0,6.5,3.536Z" stroke="#41a833" stroke-width="2" fill="none"/>
-  <path d="M12.879,12L12,12.879,9.015,9.9A4.276,4.276,0,1,1,9.9,9.015ZM6.5,3.536A2.964,2.964,0,1,0,9.464,6.5,2.964,2.964,0,0,0,6.5,3.536Z" fill="#fff"/>
-</svg>
diff --git a/browser/themes/shared/filters.svg b/browser/themes/shared/filters.svg
deleted file mode 100644
index 8fccb13cc..000000000
--- a/browser/themes/shared/filters.svg
+++ /dev/null
@@ -1,9 +0,0 @@
-<?xml version="1.0"?>
-<!-- This Source Code Form is subject to the terms of the Mozilla Public
-   - License, v. 2.0. If a copy of the MPL was not distributed with this
-   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
-<svg xmlns="http://www.w3.org/2000/svg">
-  <filter id="fill">
-    <feComposite in="FillPaint" in2="SourceGraphic" operator="in"/>
-  </filter>
-</svg>
diff --git a/browser/themes/shared/fullscreen/insecure.svg b/browser/themes/shared/fullscreen/insecure.svg
deleted file mode 100644
index eec272f7c..000000000
--- a/browser/themes/shared/fullscreen/insecure.svg
+++ /dev/null
@@ -1,39 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!-- This Source Code Form is subject to the terms of the Mozilla Public
-   - License, v. 2.0. If a copy of the MPL was not distributed with this
-   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
-<svg xmlns="http://www.w3.org/2000/svg"
-     xmlns:xlink="http://www.w3.org/1999/xlink"
-     width="24" height="24" viewBox="0 0 24 24">
-  <style>
-    .icon-default {
-      fill: #fafafa;
-    }
-  </style>
-
-  <defs>
-    <rect id="shape-lock-clasp-outer" x="5" y="1" width="14" height="20" rx="7" ry="7" />
-    <rect id="shape-lock-clasp-inner" x="8" y="4" width="8" height="14" rx="4" ry="4" />
-    <rect id="shape-lock-base" x="3" y="10" width="18" height="13" rx="1.5" ry="1.5" />
-
-    <mask id="mask-clasp-cutout">
-      <rect width="24" height="24" fill="#000" />
-      <use xlink:href="#shape-lock-clasp-outer" fill="#fff" />
-      <use xlink:href="#shape-lock-clasp-inner" fill="#000" />
-      <line x1="3" y1="21" x2="21.5" y2="0.5" stroke="#000" stroke-width="3" />
-      <line x1="3" y1="25" x2="21.5" y2="4.5" stroke="#000" stroke-width="3" />
-      <rect x="3" y="10" width="18" height="13" rx="1.5" ry="1.5" />
-    </mask>
-
-    <mask id="mask-base-cutout">
-      <rect width="24" height="24" fill="#000" />
-      <use xlink:href="#shape-lock-base" fill="#fff" />
-      <line x1="2.25" y1="24.75" x2="21.5" y2="4.5" stroke="#000" stroke-width="3" />
-    </mask>
-  </defs>
-
-  <use xlink:href="#shape-lock-clasp-outer" mask="url(#mask-clasp-cutout)" class="icon-default" />
-  <use xlink:href="#shape-lock-base" mask="url(#mask-base-cutout)" class="icon-default" />
-
-  <line x1="2.25" y1="22.75" x2="21.5" y2="2.5" stroke="#d92d21" stroke-width="3" />
-</svg>
diff --git a/browser/themes/shared/fullscreen/secure.svg b/browser/themes/shared/fullscreen/secure.svg
deleted file mode 100644
index 960fc1df0..000000000
--- a/browser/themes/shared/fullscreen/secure.svg
+++ /dev/null
@@ -1,26 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!-- This Source Code Form is subject to the terms of the Mozilla Public
-   - License, v. 2.0. If a copy of the MPL was not distributed with this
-   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
-<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width="24" height="24" viewBox="0 0 24 24">
-  <style>
-    .icon-default {
-      fill: #fafafa;
-    }
-  </style>
-
-  <defs>
-    <rect id="shape-lock-clasp-outer" x="5" y="1" width="14" height="20" rx="7" ry="7" />
-    <rect id="shape-lock-clasp-inner" x="8" y="4" width="8" height="14" rx="4" ry="4" />
-    <rect id="shape-lock-base" x="3" y="10" width="18" height="13" rx="1.5" ry="1.5" />
-
-    <mask id="mask-clasp-cutout">
-      <rect width="24" height="24" fill="#000" />
-      <use xlink:href="#shape-lock-clasp-outer" fill="#fff" />
-      <use xlink:href="#shape-lock-clasp-inner" fill="#000" />
-    </mask>
-  </defs>
-
-  <use xlink:href="#shape-lock-clasp-outer" mask="url(#mask-clasp-cutout)" class="icon-default" />
-  <use xlink:href="#shape-lock-base" class="icon-default" />
-</svg>
diff --git a/browser/themes/shared/fullscreen/warning.inc.css b/browser/themes/shared/fullscreen/warning.inc.css
deleted file mode 100644
index 7111a57c7..000000000
--- a/browser/themes/shared/fullscreen/warning.inc.css
+++ /dev/null
@@ -1,51 +0,0 @@
-%if 0
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-%endif
-
-html|*.pointerlockfswarning {
-  align-items: center;
-  background: rgba(45, 62, 72, 0.9);
-  border: 2px solid #fafafa;
-  box-shadow: 0px 0px 5px 2px rgba(0, 0, 0, 0.5);
-  border-radius: 8px;
-  padding: 24px 16px;
-  font: message-box;
-}
-
-html|*.pointerlockfswarning::before {
-  margin: 0;
-  width: 24px; height: 24px;
-}
-
-html|*.pointerlockfswarning[data-identity="verifiedIdentity"]::before,
-html|*.pointerlockfswarning[data-identity="verifiedDomain"]::before {
-  content: url("chrome://browser/skin/fullscreen/secure.svg");
-}
-
-html|*.pointerlockfswarning[data-identity="unknownIdentity"]::before {
-  content: url("chrome://browser/skin/fullscreen/insecure.svg");
-}
-
-html|*.pointerlockfswarning-domain-text,
-html|*.pointerlockfswarning-generic-text {
-  font-size: 21px;
-  font-weight: lighter;
-  color: #fafafa;
-  margin: 0 16px;
-}
-
-html|*.pointerlockfswarning-domain {
-  font-weight: bold;
-  margin: 0;
-}
-
-html|*.pointerlockfswarning-exit-button {
-  padding: 5px 30px;
-  font: message-box;
-  font-size: 14px;
-  font-weight: lighter;
-  margin: 0;
-  box-sizing: content-box;
-}
\ No newline at end of file
diff --git a/browser/themes/shared/fxa/android.png b/browser/themes/shared/fxa/android.png
deleted file mode 100644
index e0a37a85e..000000000
--- a/browser/themes/shared/fxa/android.png
+++ /dev/null
diff --git a/browser/themes/shared/fxa/android@2x.png b/browser/themes/shared/fxa/android@2x.png
deleted file mode 100644
index bb6bab5e0..000000000
--- a/browser/themes/shared/fxa/android@2x.png
+++ /dev/null
diff --git a/browser/themes/shared/fxa/default-avatar.svg b/browser/themes/shared/fxa/default-avatar.svg
deleted file mode 100644
index 540234911..000000000
--- a/browser/themes/shared/fxa/default-avatar.svg
+++ /dev/null
@@ -1,8 +0,0 @@
-<!-- This Source Code Form is subject to the terms of the Mozilla Public
-   - License, v. 2.0. If a copy of the MPL was not distributed with this
-   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
-
-<svg xmlns="http://www.w3.org/2000/svg" viewBox="194 -104 1000 1000" width="80" height="80">
-  <path fill="#c3cfd8" d="M694-104.3c276.1 0 500 223.9 500 500s-223.9 500-500 500-500-223.9-500-500c0-276.2 223.9-500 500-500z"/>
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deleted file mode 100644
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diff --git a/browser/themes/shared/fxa/ios@2x.png b/browser/themes/shared/fxa/ios@2x.png
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deleted file mode 100644
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diff --git a/browser/themes/shared/heartbeat-star-lit.svg b/browser/themes/shared/heartbeat-star-lit.svg
deleted file mode 100644
index 3f59099b9..000000000
--- a/browser/themes/shared/heartbeat-star-lit.svg
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deleted file mode 100644
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diff --git a/browser/themes/shared/icon-colors.inc.svg b/browser/themes/shared/icon-colors.inc.svg
deleted file mode 100644
index dc29d6055..000000000
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diff --git a/browser/themes/shared/icon.png b/browser/themes/shared/icon.png
deleted file mode 100644
index 891e7afb1..000000000
--- a/browser/themes/shared/icon.png
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deleted file mode 100644
index 35d84784a..000000000
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diff --git a/browser/themes/shared/identity-block/connection-mixed-passive-loaded.svg b/browser/themes/shared/identity-block/connection-mixed-passive-loaded.svg
deleted file mode 100644
index 66cb96ee0..000000000
--- a/browser/themes/shared/identity-block/connection-mixed-passive-loaded.svg
+++ /dev/null
@@ -1,52 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!-- This Source Code Form is subject to the terms of the Mozilla Public
-   - License, v. 2.0. If a copy of the MPL was not distributed with this
-   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
-<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"
-     width="16" height="16" viewBox="0 0 16 16">
-#include ../icon-colors.inc.svg
-  <style>
-    svg > g:not(:target) {
-      display: none;
-    }
-  </style>
-
-  <defs>
-    <rect id="shape-lock-clasp-outer" x="2" y="1" width="8" height="10" rx="4" ry="4" />
-    <rect id="shape-lock-clasp-inner" x="4" y="3" width="4" height="6" rx="2" ry="2" />
-    <rect id="shape-lock-base" x="1" y="6" width="10" height="7" rx="1" ry="1" />
-
-    <mask id="mask-clasp-cutout">
-      <rect width="16" height="16" fill="#000" />
-      <use xlink:href="#shape-lock-clasp-outer" fill="#fff" />
-      <use xlink:href="#shape-lock-clasp-inner" fill="#000" />
-    </mask>
-
-    <mask id="mask-lock">
-      <use xlink:href="#shape-lock-clasp-outer" mask="url(#mask-clasp-cutout)" fill="#fff"/>
-      <use xlink:href="#shape-lock-base" fill="#fff"/>
-    </mask>
-
-    <g id="warning-triangle">
-      <path fill="#fff" d="M10.5,5C9.8,5,9.1,5.4,8.8,6.2l-3.5,6.8c-0.4,0.7-0.4,1.4,0,2c0.4,0.6,1,1,1.8,1H14c0.8,0,1.4-0.4,1.8-1 c0.3-0.6,0.3-1.4,0-2l-3.5-6.8C11.9,5.4,11.2,5,10.5,5L10.5,5z"/>
-      <path fill="#ffbf00" d="M14.8,13.4l-3.5-6.8C11.2,6.2,10.9,6,10.5,6c-0.3,0-0.7,0.2-0.9,0.6l-3.5,6.8c-0.2,0.4-0.2,0.8,0,1.1C6.3,14.8,6.6,15,7,15 H14c0.4,0,0.7-0.2,0.9-0.5C15.1,14.2,15,13.8,14.8,13.4z"/>
-      <path fill="#fff" d="M10,8.5C10,8.2,10.2,8,10.5,8S11,8.2,11,8.5L10.8,11h-0.6L10,8.5z"/>
-      <circle fill="#fff" cx="10.5" cy="12.5" r=".75"/>
-    </g>
-  </defs>
-
-  <g id="icon">
-    <rect width="16" height="16" mask="url(#mask-lock)" class="fieldtext"/>
-    <use xlink:href="#warning-triangle"/>
-  </g>
-
-  <g id="icon-black">
-    <rect width="16" height="16" mask="url(#mask-lock)" class="black"/>
-    <use xlink:href="#warning-triangle"/>
-  </g>
-
-  <g id="icon-white">
-    <rect width="16" height="16" mask="url(#mask-lock)" class="white"/>
-    <use xlink:href="#warning-triangle"/>
-  </g>
-</svg>
diff --git a/browser/themes/shared/identity-block/connection-secure.svg b/browser/themes/shared/identity-block/connection-secure.svg
deleted file mode 100644
index 5dad8903b..000000000
--- a/browser/themes/shared/identity-block/connection-secure.svg
+++ /dev/null
@@ -1,27 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!-- This Source Code Form is subject to the terms of the Mozilla Public
-   - License, v. 2.0. If a copy of the MPL was not distributed with this
-   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
-<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"
-     width="16" height="16" viewBox="0 0 16 16">
-  <style>
-    .icon-default {
-      fill: #4d9a26;
-    }
-  </style>
-
-  <defs>
-    <rect id="shape-lock-clasp-outer" x="4" y="2" width="8" height="10" rx="4" ry="4" />
-    <rect id="shape-lock-clasp-inner" x="6" y="4" width="4" height="6" rx="2" ry="2" />
-    <rect id="shape-lock-base" x="3" y="7" width="10" height="7" rx="1" ry="1" />
-
-    <mask id="mask-clasp-cutout">
-      <rect width="16" height="16" fill="#000" />
-      <use xlink:href="#shape-lock-clasp-outer" fill="#fff" />
-      <use xlink:href="#shape-lock-clasp-inner" fill="#000" />
-    </mask>
-  </defs>
-
-  <use xlink:href="#shape-lock-clasp-outer" mask="url(#mask-clasp-cutout)" class="icon-default" />
-  <use xlink:href="#shape-lock-base" class="icon-default" />
-</svg>
diff --git a/browser/themes/shared/identity-block/icons.inc.css b/browser/themes/shared/identity-block/icons.inc.css
deleted file mode 100644
index 6cf300061..000000000
--- a/browser/themes/shared/identity-block/icons.inc.css
+++ /dev/null
@@ -1,62 +0,0 @@
-%if 0
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-%endif
-
-@selectorPrefix@#identity-icon@selectorSuffix@ {
-  list-style-image: url(chrome://browser/skin/identity-icon.svg#normal@iconVariant@);
-}
-
-@selectorPrefix@#identity-box:hover > #identity-icon:not(.no-hover)@selectorSuffix@,
-@selectorPrefix@#identity-box[open=true] > #identity-icon@selectorSuffix@ {
-  list-style-image: url(chrome://browser/skin/identity-icon.svg#hover@iconVariant@);
-}
-
-@selectorPrefix@#identity-box.grantedPermissions > #identity-icon@selectorSuffix@ {
-  list-style-image: url(chrome://browser/skin/identity-icon.svg#notice@iconVariant@);
-}
-
-@selectorPrefix@#identity-box.grantedPermissions:hover > #identity-icon:not(.no-hover)@selectorSuffix@,
-@selectorPrefix@#identity-box.grantedPermissions[open=true] > #identity-icon@selectorSuffix@ {
-  list-style-image: url(chrome://browser/skin/identity-icon.svg#notice-hover@iconVariant@);
-}
-
-@selectorPrefix@#urlbar[pageproxystate="valid"] > #identity-box.chromeUI > #identity-icon@selectorSuffix@ {
-  list-style-image: url(chrome://branding/content/identity-icons-brand.svg);
-}
-
-
-@selectorPrefix@#tracking-protection-icon@selectorSuffix@ {
-  list-style-image: url(chrome://browser/skin/tracking-protection-16.svg#enabled@iconVariant@);
-}
-
-@selectorPrefix@#tracking-protection-icon[state="loaded-tracking-content"]@selectorSuffix@ {
-  list-style-image: url(chrome://browser/skin/tracking-protection-16.svg#disabled@iconVariant@);
-}
-
-
-@selectorPrefix@#urlbar[pageproxystate="valid"] > #identity-box.verifiedDomain > #connection-icon@selectorSuffix@,
-@selectorPrefix@#urlbar[pageproxystate="valid"] > #identity-box.verifiedIdentity > #connection-icon@selectorSuffix@,
-@selectorPrefix@#urlbar[pageproxystate="valid"] > #identity-box.mixedActiveBlocked > #connection-icon@selectorSuffix@ {
-  list-style-image: url(chrome://browser/skin/connection-secure.svg);
-  visibility: visible;
-}
-
-@selectorPrefix@#urlbar[pageproxystate="valid"] > #identity-box.certUserOverridden > #connection-icon@selectorSuffix@ {
-  list-style-image: url(chrome://browser/skin/connection-mixed-passive-loaded.svg#icon@iconVariant@);
-  visibility: visible;
-}
-
-@selectorPrefix@#urlbar[pageproxystate="valid"] > #identity-box.insecureLoginForms > #connection-icon@selectorSuffix@,
-@selectorPrefix@#urlbar[pageproxystate="valid"] > #identity-box.mixedActiveContent > #connection-icon@selectorSuffix@ {
-  list-style-image: url(chrome://browser/skin/connection-mixed-active-loaded.svg#icon@iconVariant@);
-  visibility: visible;
-}
-
-@selectorPrefix@#urlbar[pageproxystate="valid"] > #identity-box.weakCipher > #connection-icon@selectorSuffix@,
-@selectorPrefix@#urlbar[pageproxystate="valid"] > #identity-box.mixedDisplayContent > #connection-icon@selectorSuffix@,
-@selectorPrefix@#urlbar[pageproxystate="valid"] > #identity-box.mixedDisplayContentLoadedActiveBlocked > #connection-icon@selectorSuffix@ {
-  list-style-image: url(chrome://browser/skin/connection-mixed-passive-loaded.svg#icon@iconVariant@);
-  visibility: visible;
-}
diff --git a/browser/themes/shared/identity-block/identity-block.inc.css b/browser/themes/shared/identity-block/identity-block.inc.css
deleted file mode 100644
index 6fa40e9db..000000000
--- a/browser/themes/shared/identity-block/identity-block.inc.css
+++ /dev/null
@@ -1,163 +0,0 @@
-%if 0
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-%endif
-
-%filter substitution
-
-%define selectorPrefix
-%define selectorSuffix
-%define iconVariant
-%include icons.inc.css
-
-%define selectorPrefix
-%define selectorSuffix :-moz-lwtheme
-%define iconVariant -black
-%include icons.inc.css
-
-#identity-box {
-  font-size: .9em;
-  padding: 3px 5px;
-  overflow: hidden;
-  /* The padding-left and padding-right transitions handle the delayed hiding of
-     the forward button when hovered. */
-  transition: padding-left, padding-right;
-}
-
-#urlbar[pageproxystate="valid"] > #identity-box.verifiedIdentity > #identity-icon-labels {
-  color: hsl(92,100%,30%);
-}
-
-#urlbar[pageproxystate="valid"] > #identity-box.chromeUI > #identity-icon-labels {
-%ifdef MOZ_OFFICIAL_BRANDING
-  color: rgb(229,115,0);
-%else
-  color: inherit;
-%endif
-}
-
-#identity-icon-labels:-moz-locale-dir(ltr) {
-  padding-left: 2px;
-}
-
-#identity-icon-labels:-moz-locale-dir(rtl) {
-  padding-right: 2px;
-}
-
-@conditionalForwardWithUrlbar@ > #forward-button[disabled] + #urlbar > #identity-box {
-  padding-inline-start: calc(var(--backbutton-urlbar-overlap) + 5px);
-}
-
-@conditionalForwardWithUrlbar@:hover:not([switchingtabs]) > #forward-button[disabled] + #urlbar > #identity-box {
-  /* Forward button hiding is delayed when hovered, so we should use the same
-     delay for the identity box. We handle both horizontal paddings (for LTR and
-     RTL), the latter two delays here are for padding-left and padding-right. */
-  transition-delay: 100s, 100s;
-}
-
-@conditionalForwardWithUrlbar@:not(:hover) > #forward-button[disabled] + #urlbar > #identity-box {
-  /* when not hovered anymore, trigger a new non-delayed transition to react to the forward button hiding */
-  padding-inline-start: calc(var(--backbutton-urlbar-overlap) + 5.01px);
-}
-
-/* MAIN IDENTITY ICON */
-
-#identity-icon {
-  width: 16px;
-  height: 16px;
-}
-
-#urlbar[pageproxystate="invalid"] > #identity-box > #identity-icon {
-  opacity: .3;
-}
-
-#urlbar[actiontype="searchengine"] > #identity-box > #identity-icon {
-  -moz-image-region: inherit;
-  list-style-image: url(chrome://global/skin/icons/autocomplete-search.svg#search-icon);
-  width: 16px;
-  height: 16px;
-}
-
-#urlbar[actiontype="extension"] > #identity-box > #identity-icon {
-  -moz-image-region: inherit;
-  list-style-image: url(chrome://browser/skin/addons/addon-install-anchor.svg);
-  width: 16px;
-  height: 16px;
-}
-
-/* SHARING ICON */
-
-#sharing-icon {
-  width: 16px;
-  height: 16px;
-  margin-inline-start: -16px;
-  position: relative;
-  display: none;
-}
-
-#identity-box[sharing="camera"] > #sharing-icon {
-  list-style-image: url("chrome://browser/skin/notification-icons.svg#camera-sharing");
-}
-
-#identity-box[sharing="microphone"] > #sharing-icon {
-  list-style-image: url("chrome://browser/skin/notification-icons.svg#microphone-sharing");
-}
-
-#identity-box[sharing="screen"] > #sharing-icon {
-  list-style-image: url("chrome://browser/skin/notification-icons.svg#screen-sharing");
-}
-
-#identity-box[sharing] > #sharing-icon {
-  display: -moz-box;
-  animation-delay: -1.5s;
-}
-
-#identity-box[sharing] > #identity-icon,
-#sharing-icon {
-  animation: 3s linear pulse infinite;
-}
-
-@keyframes pulse {
-  0%, 16.66%, 83.33%, 100% {
-    opacity: 0;
-  }
-  33.33%, 66.66% {
-    opacity: 1;
-  }
-}
-
-/* TRACKING PROTECTION ICON */
-
-#tracking-protection-icon {
-  width: 16px;
-  height: 16px;
-  margin-inline-start: 2px;
-  margin-inline-end: 0;
-}
-
-#tracking-protection-icon[animate] {
-  transition: margin-left 200ms ease-out, margin-right 200ms ease-out;
-}
-
-#tracking-protection-icon:not([state]) {
-  margin-inline-end: -18px;
-  pointer-events: none;
-  opacity: 0;
-  /* Only animate the shield in, when it disappears hide it immediately. */
-  transition: none;
-}
-
-#urlbar[pageproxystate="invalid"] > #identity-box > #tracking-protection-icon {
-  visibility: collapse;
-}
-
-/* CONNECTION ICON */
-
-#connection-icon {
-  width: 16px;
-  height: 16px;
-  margin-inline-start: 2px;
-  visibility: collapse;
-}
-
diff --git a/browser/themes/shared/identity-block/identity-icon.svg b/browser/themes/shared/identity-block/identity-icon.svg
deleted file mode 100755
index 9f4c81655..000000000
--- a/browser/themes/shared/identity-block/identity-icon.svg
+++ /dev/null
@@ -1,39 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!-- This Source Code Form is subject to the terms of the Mozilla Public
-   - License, v. 2.0. If a copy of the MPL was not distributed with this
-   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
-<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"
-     class="fieldtext"
-     width="16" height="16" viewBox="0 0 16 16">
-#include ../icon-colors.inc.svg
-  <style>
-    use:not(:target) {
-      display: none;
-    }
-    use {
-      fill-rule: evenodd;
-    }
-  </style>
-
-  <defs>
-    <path id="glyph-normal" d="M128,193a7,7,0,1,1,7-7A7,7,0,0,1,128,193Zm0-13a6,6,0,1,0,6,6A6,6,0,0,0,128,180Zm0,10a1,1,0,0,1-1-1v-3a1,1,0,0,1,2,0v3A1,1,0,0,1,128,190Zm0-6a1,1,0,1,1,1-1A1,1,0,0,1,128,184Z" transform="translate(-120 -178)"/>
-    <path id="glyph-hover" d="M102,179a7,7,0,1,1-7,7A7,7,0,0,1,102,179Zm0,3a1,1,0,1,1-1,1A1,1,0,0,1,102,182Zm0,3a1,1,0,0,1,1,1v3a1,1,0,0,1-2,0v-3A1,1,0,0,1,102,185Z" transform="translate(-94 -178)"/>
-    <path id="glyph-notice" d="M133.5,202a2.5,2.5,0,1,1,2.5-2.5A2.5,2.5,0,0,1,133.5,202Zm-5.5,1a1,1,0,1,1,1-1A1,1,0,0,1,128,203Zm1,5a1,1,0,0,1-2,0v-3a1,1,0,0,1,2,0v3Zm-1-9a6.08,6.08,0,1,0,5.629,3.987,3.452,3.452,0,0,0,.984-0.185A6.9,6.9,0,0,1,135,205a7,7,0,1,1-7-7,6.9,6.9,0,0,1,2.2.387,3.452,3.452,0,0,0-.185.984A5.951,5.951,0,0,0,128,199Z" transform="translate(-120 -197)"/>
-    <path id="glyph-notice-hover" d="M107.5,202a2.5,2.5,0,1,1,2.5-2.5A2.5,2.5,0,0,1,107.5,202Zm0,1.039a3.5,3.5,0,0,0,1.125-.2,7.124,7.124,0,1,1-4.464-4.464,3.5,3.5,0,0,0-.2,1.125A3.54,3.54,0,0,0,107.5,203.039ZM102,201a1,1,0,1,0,1,1A1,1,0,0,0,102,201Zm1,4a1,1,0,0,0-2,0v3a1,1,0,0,0,2,0v-3Z" transform="translate(-94 -197)"/>
-  </defs>
-
-  <use id="normal" xlink:href="#glyph-normal"/>
-  <use id="hover" xlink:href="#glyph-hover"/>
-  <use id="notice" xlink:href="#glyph-notice"/>
-  <use id="notice-hover" xlink:href="#glyph-notice-hover"/>
-
-  <use class="black" id="normal-black" xlink:href="#glyph-normal"/>
-  <use class="black" id="hover-black" xlink:href="#glyph-hover"/>
-  <use class="black" id="notice-black" xlink:href="#glyph-notice"/>
-  <use class="black" id="notice-hover-black" xlink:href="#glyph-notice-hover"/>
-
-  <use class="white" id="normal-white" xlink:href="#glyph-normal"/>
-  <use class="white" id="hover-white" xlink:href="#glyph-hover"/>
-  <use class="white" id="notice-white" xlink:href="#glyph-notice"/>
-  <use class="white" id="notice-hover-white" xlink:href="#glyph-notice-hover"/>
-</svg>
diff --git a/browser/themes/shared/identity-block/tracking-protection-16.svg b/browser/themes/shared/identity-block/tracking-protection-16.svg
deleted file mode 100755
index 6517fe36b..000000000
--- a/browser/themes/shared/identity-block/tracking-protection-16.svg
+++ /dev/null
@@ -1,59 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!-- This Source Code Form is subject to the terms of the Mozilla Public
-   - License, v. 2.0. If a copy of the MPL was not distributed with this
-   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
-<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"
-     width="16" height="16" viewBox="0 0 16 16">
-#include ../icon-colors.inc.svg
-  <style>
-    g:not(:target) {
-      display: none;
-    }
-  </style>
-
-  <defs>
-    <path id="shape-shield-outer" d="M8,1L2.8,1.9C2.4,1.9,2,2.4,2,2.8C2,4,2,6.1,2.1,7.1c0.3,2.7,0.8,4,1.9,5.6C5.6,14.7,8,15,8,15s2.4-0.3,4-2.4 c1.2-1.5,1.7-2.9,1.9-5.6C14,6.1,14,4,14,2.8c0-0.5-0.4-0.9-0.8-1L8,1L8,1z"/>
-    <path id="shape-shield-inner" d="M8,2l5,0.8c0,2,0,3.5-0.1,4.1c-0.3,2.7-0.8,3.8-1.7,5.1c-1.1,1.5-2.7,1.9-3.2,2c-0.4-0.1-2.1-0.5-3.2-2 c-1-1.3-1.5-2.4-1.7-5.1C3,6.3,3,4.8,3,2.8L8,2"/>
-    <path id="shape-shield-detail" d="M8,13c-0.5-0.1-1.6-0.5-2.4-1.5c-0.9-1.2-1.3-2.1-1.5-4.6C4,6.3,4,5.2,4,3.7L8,3 V13z"/>
-
-    <mask id="mask-shield-cutout">
-      <rect width="16" height="16" fill="#000" />
-      <use xlink:href="#shape-shield-outer" fill="#fff" />
-      <use xlink:href="#shape-shield-inner" fill="#000" />
-      <use xlink:href="#shape-shield-detail" fill="#fff" />
-    </mask>
-
-    <mask id="mask-shield-cutout-disabled">
-      <rect width="16" height="16" fill="#000"/>
-      <use xlink:href="#shape-shield-outer" fill="#fff"/>
-      <use xlink:href="#shape-shield-inner" fill="#000"/>
-      <use xlink:href="#shape-shield-detail" fill="#fff"/>
-      <line x1="3" y1="15" x2="15" y2="3" stroke="#000" stroke-width="2"/>
-    </mask>
-
-    <line id="strike-through-red" x1="3" y1="14" x2="15" y2="2" stroke="#d92d21" stroke-width="2"/>
-  </defs>
-
-  <g id="enabled">
-    <use class="fieldtext" xlink:href="#shape-shield-outer" mask="url(#mask-shield-cutout)"/>
-  </g>
-  <g id="enabled-black">
-    <use class="black" xlink:href="#shape-shield-outer" mask="url(#mask-shield-cutout)"/>
-  </g>
-  <g id="enabled-white">
-    <use class="white" xlink:href="#shape-shield-outer" mask="url(#mask-shield-cutout)"/>
-  </g>
-
-  <g id="disabled">
-    <use class="fieldtext" xlink:href="#shape-shield-outer" mask="url(#mask-shield-cutout-disabled)"/>
-    <use xlink:href="#strike-through-red"/>
-  </g>
-  <g id="disabled-black">
-    <use class="black" xlink:href="#shape-shield-outer" mask="url(#mask-shield-cutout-disabled)"/>
-    <use xlink:href="#strike-through-red"/>
-  </g>
-  <g id="disabled-white">
-    <use class="white" xlink:href="#shape-shield-outer" mask="url(#mask-shield-cutout-disabled)"/>
-    <use xlink:href="#strike-through-red"/>
-  </g>
-</svg>
diff --git a/browser/themes/shared/incontent-icons/cert-error.svg b/browser/themes/shared/incontent-icons/cert-error.svg
deleted file mode 100644
index 9d23267bb..000000000
--- a/browser/themes/shared/incontent-icons/cert-error.svg
+++ /dev/null
@@ -1,42 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-
-<svg version="1.1"
-     xmlns="http://www.w3.org/2000/svg"
-     xmlns:xlink="http://www.w3.org/1999/xlink"
-     width="45"
-     height="45"
-     viewBox="0 0 45 45">
-
-  <style>
-    .icon-default {
-      fill: #999;
-    }
-  </style>
-
-  <defs>
-    <rect id="shape-lock-clasp-outer" x="8" y="2" width="28" height="40" rx="14" ry="14" />
-    <rect id="shape-lock-clasp-inner" x="14" y="8" width="16" height="28" rx="8" ry="8" />
-    <rect id="shape-lock-base" x="4" y="18" width="36" height="24" rx="3" ry="3" />
-
-    <mask id="mask-clasp-cutout">
-      <rect width="48" height="48" fill="#000" />
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diff --git a/browser/themes/shared/incontent-icons/icon-search-64.svg b/browser/themes/shared/incontent-icons/icon-search-64.svg
deleted file mode 100644
index 56ba96fff..000000000
--- a/browser/themes/shared/incontent-icons/icon-search-64.svg
+++ /dev/null
@@ -1,12 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!-- This Source Code Form is subject to the terms of the Mozilla Public
-   - License, v. 2.0. If a copy of the MPL was not distributed with this
-   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
-<svg xmlns="http://www.w3.org/2000/svg" width="64" height="64" viewBox="0 0 64 64">
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-  <circle cx="32" cy="32" r="30" fill="#58bf43"/>
-  <circle cx="32" cy="32" r="29.5" stroke="#41a833" stroke-width="1" fill="none"/>
-  <path d="M50,47.131L47.131,50,36.776,39.647a16.038,16.038,0,1,1,2.871-2.871ZM27,15A12,12,0,1,0,39,27,12,12,0,0,0,27,15Z" stroke="#41a833" stroke-width="2" fill="none"/>
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diff --git a/browser/themes/shared/incontent-icons/session-restore.svg b/browser/themes/shared/incontent-icons/session-restore.svg
deleted file mode 100644
index f545a3362..000000000
--- a/browser/themes/shared/incontent-icons/session-restore.svg
+++ /dev/null
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-<!-- This Source Code Form is subject to the terms of the Mozilla Public

-   - License, v. 2.0. If a copy of the MPL was not distributed with this

-   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->

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diff --git a/browser/themes/shared/incontent-icons/tab-crashed.svg b/browser/themes/shared/incontent-icons/tab-crashed.svg
deleted file mode 100644
index 41470df5c..000000000
--- a/browser/themes/shared/incontent-icons/tab-crashed.svg
+++ /dev/null
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-<?xml version="1.0" encoding="utf-8"?>

-<!-- This Source Code Form is subject to the terms of the Mozilla Public

-   - License, v. 2.0. If a copy of the MPL was not distributed with this

-   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->

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diff --git a/browser/themes/shared/incontent-icons/welcome-back.svg b/browser/themes/shared/incontent-icons/welcome-back.svg
deleted file mode 100644
index 2fbea04b4..000000000
--- a/browser/themes/shared/incontent-icons/welcome-back.svg
+++ /dev/null
@@ -1,13 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>

-<!-- This Source Code Form is subject to the terms of the Mozilla Public

-   - License, v. 2.0. If a copy of the MPL was not distributed with this

-   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->

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diff --git a/browser/themes/shared/incontent-icons/wifi.svg b/browser/themes/shared/incontent-icons/wifi.svg
deleted file mode 100644
index 39fd93623..000000000
--- a/browser/themes/shared/incontent-icons/wifi.svg
+++ /dev/null
@@ -1,30 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!-- This Source Code Form is subject to the terms of the Mozilla Public
-   - License, v. 2.0. If a copy of the MPL was not distributed with this
-   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
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-     height="64"
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-      fill: #797c80;
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-  <g clip-path="url('#clip-path')">
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diff --git a/browser/themes/shared/incontentprefs/containers.css b/browser/themes/shared/incontentprefs/containers.css
deleted file mode 100644
index 5446dccce..000000000
--- a/browser/themes/shared/incontentprefs/containers.css
+++ /dev/null
@@ -1,32 +0,0 @@
-/* Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-%include ../../../components/contextualidentity/content/usercontext.css
-
-.container-header-links {
-  margin-block-end: 15px;
-}
-
-[data-identity-icon] {
-  margin: 0;
-  margin-inline-end: 16px;
-}
-
-#containersView {
-  border: 0 none;
-  background: transparent;
-}
-
-#containersView richlistitem {
-  margin: 0px;
-  margin-inline-end: 8px;
-  padding: 0;
-  padding-block-end: 8px;
-  border-block-end: 1px solid var(--in-content-header-border-color);
-}
-
-#containersView richlistitem:last-of-type {
-  border-block-end: 0 none;
-  margin-block-end: 8px;
-}
diff --git a/browser/themes/shared/incontentprefs/dialog.inc.css b/browser/themes/shared/incontentprefs/dialog.inc.css
deleted file mode 100644
index 27de416ab..000000000
--- a/browser/themes/shared/incontentprefs/dialog.inc.css
+++ /dev/null
@@ -1,68 +0,0 @@
-%if 0
-/* - This Source Code Form is subject to the terms of the Mozilla Public
-   - License, v. 2.0. If a copy of the MPL was not distributed with this file,
-   - You can obtain one at http://mozilla.org/MPL/2.0/. */
-%endif
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-dialog,
-window,
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-prefwindow,
-.windowDialog {
-  -moz-appearance: none;
-  background-color: #fbfbfb;
-  color: #424e5a;
-  margin: 0;
-  padding: 0;
-}
-
-.contentPane {
-  margin: 0;
-}
-
-tabbox {
-  /* override the rule in certManager.xul */
-  margin: 0 0 5px !important;
-}
-
-tabpanels {
-  font-size: 1em;
-}
-
-tabs,
-label,
-description,
-#useDocumentColors {
-  margin-right: 4px;
-  margin-left: 4px;
-}
-
-tree:not(#rejectsTree) {
-  min-height: 15em;
-}
-
-.actionButtons {
-  margin: 3px 0 0 !important;
-}
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-caption {
-  padding-inline-start: 0;
-}
-
-groupbox {
-  font-size: 1em;
-  margin-top: 0;
-  margin-right: 4px;
-  margin-left: 4px;
-  padding-top: 0;
-  padding-bottom: 5px;
-}
-
-prefpane .groupbox-body {
-  padding: 0 0 5px;
-}
-
-groupbox description {
-  margin-right: 0;
-  margin-left: 0;
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diff --git a/browser/themes/shared/incontentprefs/favicon.ico b/browser/themes/shared/incontentprefs/favicon.ico
deleted file mode 100644
index 4d07d2b5d..000000000
--- a/browser/themes/shared/incontentprefs/favicon.ico
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diff --git a/browser/themes/shared/incontentprefs/icons.svg b/browser/themes/shared/incontentprefs/icons.svg
deleted file mode 100644
index 2d0b67155..000000000
--- a/browser/themes/shared/incontentprefs/icons.svg
+++ /dev/null
@@ -1,63 +0,0 @@
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-   - License, v. 2.0. If a copy of the MPL was not distributed with this
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-    use {
-      fill: #fbfbfb;
-      stroke: rgba(0,0,0,0.4);
-      stroke-width: .5px;
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-      <path d="M21.632,9.541c-0.083,1.403,0.246,3.079-1.597,5.498 c-1.965,2.578-3.914,2.594-4.284,2.575c-2.249-0.117-2.502-1.875-3.792-1.875c-1.13,0-2.012,1.745-3.711,1.836 c-0.37,0.02-2.319,0.042-4.284-2.536c-1.841-2.419-1.514-4.095-1.597-5.498C2.287,8.138,2,6.618,2,6.618s0.887,0.895,2.033,0.973 C5.179,7.67,5.394,7.191,7.811,6.501C10.424,5.752,12,8.814,12,8.814s1.776-3.016,4.189-2.313c2.414,0.7,2.515,1.169,3.661,1.091 C20.996,7.513,22,6.618,22,6.618S21.713,8.138,21.632,9.541z M8.117,10.129c-1.429-0.314-2.028,0.223-2.642,0.451 c-0.534,0.202-1.02,0.264-1.02,0.264s0.083,0.819,1.515,1.521c1.432,0.703,4.37,0.338,4.37,0.338S10.651,10.687,8.117,10.129z M18.525,10.58c-0.612-0.228-1.212-0.765-2.642-0.451c-2.534,0.558-2.223,2.573-2.223,2.573s2.938,0.365,4.37-0.338 c1.432-0.702,1.515-1.521,1.515-1.521S19.059,10.782,18.525,10.58z"/>
-    </g>
-    <g id="security-shape">
-      <path d="M18.909,9.783h-0.863V8.086C18.046,4.725,15.339,2,12,2 C8.661,2,5.954,4.725,5.954,8.086v1.697H5.091c-0.955,0-1.728,0.779-1.728,1.739v8.738c0,0.961,0.773,1.74,1.728,1.74h13.818 c0.954,0,1.728-0.779,1.728-1.74v-8.738C20.637,10.562,19.863,9.783,18.909,9.783z M8.545,8.086c0-1.92,1.547-3.478,3.455-3.478 c1.908,0,3.455,1.557,3.455,3.478v1.697h-6.91V8.086z M5.181,16.092l-0.909-1.2v-2.284l2.728,3.483H5.181z M8.818,16.092 l-2.773-3.657h1.727l2.864,3.657H8.818z M12,16.092l-2.773-3.657h1.727l2.864,3.657H12z M15.637,16.092l-2.773-3.657h1.727 l2.864,3.657H15.637z M19.728,16.092h-0.455l-2.773-3.657h1.727l1.501,1.916V16.092z"/>
-    </g>
-    <g id="sync-shape">
-      <path d="M17.024,3.351 c-0.562,0.331 -1.311,0.879 -1.821,1.698 -0.367,0.592 -0.752,1.288 -1.08,1.914 0.987,0.413 1.862,1.095 2.476,2.029 0.614,0.957 0.929,2.122 0.83,3.351 -0.201,1.787 -1.359,3.433 -3.046,4.36 -0.696,-0.774 -1.951,-2.945 -1.951,-2.945 -0.007,0.007 -0.004,2.556 -0.871,4.334 -0.573,1.184 -1.24,2.202 -2.305,2.995 1.431,0.51 2.915,0.886 4.282,0.909 l 0.162,0.002 c 2.99,0.021 5.844,-0.48 5.844,-0.48 0,0 -1.236,-0.802 -1.808,-1.346 1.86,-1.072 3.111,-2.791 3.634,-4.708 0.283,-0.759 0.478,-1.566 0.57,-2.409 C 22.383,9.011 20.33,5.278 17.024,3.351 Z M 6.569,12.302 C 6.526,10.271 7.755,8.327 9.644,7.29 c 0.696,0.774 2.32,2.899 2.32,2.899 0,0 -0.064,-5.157 1.657,-7.973 -6.097,-0.668 -9.69,0.443 -9.69,0.443 0,0 1.763,0.607 2.333,1.136 C 6.122,3.891 5.984,3.992 5.85,4.096 4.4,5.064 3.368,6.449 2.825,7.994 2.436,8.892 2.171,9.863 2.06,10.887 1.622,14.886 3.629,18.572 6.871,20.515 7.39,20.124 7.975,19.631 8.61,18.983 9.189,18.389 9.647,17.682 10.021,16.967 8.082,16.208 6.714,14.404 6.569,12.302 Z"/>
-    </g>
-    <g id="advanced-shape">
-      <path d="M19.173,16.163c0.004,0.04,0.007,0.08,0.007,0.121c0,1.748-3.197,3.165-7.14,3.165 c-3.943,0-7.14-1.417-7.14-3.165c0 -0.037,0.003-0.073,0.006-0.109C3.11,16.572,2,17.243,2,18.341C2,20.362,6.477,22,12,22 c5.523,0,10-1.638,10-3.659 C22,17.22,20.922,16.553,19.173,16.163z"/>
-      <path d="M18.224,15.979c0.006-0.11-0.018-0.285-0.054-0.39c0,0-0.762-2.205-1.176-3.403 c-0.624-1.807-2.112-6.139-2.112-6.139c-0.036-0.104-0.031-0.273,0.01-0.376l0.497-1.234c0.041-0.102,0.116-0.266,0.166-0.364 l0.986-1.942c0.05-0.098,0.013-0.133-0.081-0.077L9.965,5.871c-0.095,0.056-0.203,0.186-0.24,0.29c0,0-0.252,0.7-0.412,1.144 C8.64,9.173,7.968,11.04,7.296,12.908c-0.26,0.723-0.52,1.446-0.78,2.168c-0.056,0.156-0.112,0.311-0.168,0.466 c-0.093,0.26-0.049,0.617,0.032,0.881c0.237,0.763,1.001,1.189,1.708,1.435c0.611,0.213,1.254,0.328,1.895,0.403 c0.895,0.105,1.805,0.14,2.706,0.112c1.356-0.041,2.767-0.261,4.004-0.846c0.429-0.203,0.854-0.459,1.174-0.816 c0.121-0.135,0.226-0.287,0.297-0.455C18.215,16.134,18.224,15.979,18.224,15.979z M14.063,16.131 c0.019,0.108-0.046,0.156-0.143,0.104l-1.466-0.772c-0.097-0.052-0.257-0.052-0.354,0l-1.466,0.773 c-0.097,0.052-0.162,0.004-0.143-0.104l0.28-1.636c0.019-0.109-0.031-0.261-0.109-0.338l-1.186-1.158 c-0.079-0.077-0.054-0.153,0.055-0.169l1.638-0.239c0.109-0.016,0.238-0.11,0.286-0.209l0.733-1.488 c0.049-0.099,0.128-0.099,0.177,0l0.733,1.488c0.049,0.099,0.178,0.193,0.286,0.209l1.639,0.239 c0.109,0.016,0.134,0.092,0.055,0.169l-1.186,1.158c-0.079,0.077-0.128,0.229-0.109,0.338L14.063,16.131z"/>
-    </g>
-  </defs>
-  <use id="general" xlink:href="#general-shape"/>
-  <use id="general-native" xlink:href="#general-shape"/>
-  <use id="search" xlink:href="#search-shape"/>
-  <use id="search-native" xlink:href="#search-shape"/>
-  <use id="content" xlink:href="#content-shape"/>
-  <use id="content-native" xlink:href="#content-shape"/>
-  <use id="applications" xlink:href="#applications-shape"/>
-  <use id="applications-native" xlink:href="#applications-shape"/>
-  <use id="privacy" xlink:href="#privacy-shape"/>
-  <use id="privacy-native" xlink:href="#privacy-shape"/>
-  <use id="security" xlink:href="#security-shape"/>
-  <use id="security-native" xlink:href="#security-shape"/>
-  <use id="sync" xlink:href="#sync-shape"/>
-  <use id="sync-native" xlink:href="#sync-shape"/>
-  <use id="advanced" xlink:href="#advanced-shape"/>
-  <use id="advanced-native" xlink:href="#advanced-shape"/>
-</svg>
diff --git a/browser/themes/shared/incontentprefs/preferences.inc.css b/browser/themes/shared/incontentprefs/preferences.inc.css
deleted file mode 100644
index 0e62660de..000000000
--- a/browser/themes/shared/incontentprefs/preferences.inc.css
+++ /dev/null
@@ -1,596 +0,0 @@
-%if 0
-/* - This Source Code Form is subject to the terms of the Mozilla Public
-   - License, v. 2.0. If a copy of the MPL was not distributed with this file,
-   - You can obtain one at http://mozilla.org/MPL/2.0/. */
-%endif
-@namespace html "http://www.w3.org/1999/xhtml";
-
-#mainPrefPane {
-  max-width: 800px;
-  padding: 0;
-  font: message-box;
-  font-size: 1.25rem;
-}
-
-* {
-  -moz-user-select: text;
-}
-
-button,
-treecol {
-  /* override the * rule */
-  -moz-user-select: none;
-}
-
-#engineList treechildren::-moz-tree-image(engineShown, checked),
-#blocklistsTree treechildren::-moz-tree-image(selectionCol, checked) {
-  list-style-image: url("chrome://global/skin/in-content/check.svg#check");
-  width: 21px;
-  height: 21px;
-}
-
-#engineList treechildren::-moz-tree-image(engineShown, checked, selected),
-#blocklistsTree treechildren::-moz-tree-image(selectionCol, checked, selected) {
-  list-style-image: url("chrome://global/skin/in-content/check.svg#check-inverted");
-}
-
-#engineList treechildren::-moz-tree-row,
-#blocklistsTree treechildren::-moz-tree-row {
-  min-height: 36px;
-}
-
-#selectionCol {
-  min-width: 26px;
-}
-
-/* Category List */
-
-#categories {
-  max-height: 100vh;
-}
-
-#categories > scrollbox {
-  overflow-x: hidden !important;
-}
-
-/**
- * We want the last category to always have non-0 getBoundingClientRect().bottom
- * so we can use the value to figure out the max-height of the list in
- * preferences.js, so use collapse instead of display: none; if it's hidden
- */
-#categories > .category[hidden="true"] {
-  display: -moz-box;
-  visibility: collapse;
-}
-
-#category-general > .category-icon {
-  list-style-image: url("chrome://browser/skin/preferences/in-content/icons.svg#general");
-}
-
-#category-search > .category-icon {
-  list-style-image: url("chrome://browser/skin/preferences/in-content/icons.svg#search");
-}
-
-#category-content > .category-icon {
-  list-style-image: url("chrome://browser/skin/preferences/in-content/icons.svg#content");
-}
-
-#category-application > .category-icon {
-  list-style-image: url("chrome://browser/skin/preferences/in-content/icons.svg#applications");
-}
-
-#category-privacy > .category-icon {
-  list-style-image: url("chrome://browser/skin/preferences/in-content/icons.svg#privacy");
-}
-
-#category-security > .category-icon {
-  list-style-image: url("chrome://browser/skin/preferences/in-content/icons.svg#security");
-}
-
-#category-sync > .category-icon {
-  list-style-image: url("chrome://browser/skin/preferences/in-content/icons.svg#sync");
-}
-
-#category-advanced > .category-icon {
-  list-style-image: url("chrome://browser/skin/preferences/in-content/icons.svg#advanced");
-}
-
-@media (max-width: 800px) {
-  .category-name {
-    display: none;
-  }
-}
-
-/* header */
-.header {
-  display: flex;
-  align-items: center;
-  justify-content: space-between;
-}
-
-.header[hidden=true] {
-  display: none;
-}
-
-#header-advanced {
-  border-bottom: none;
-  padding-bottom: 0;
-}
-
-/* General Pane */
-
-#startupTable {
-  border-collapse: collapse;
-}
-
-#startupTable > tr > td {
-  padding: 0; /* remove the padding from html.css */
-}
-
-#startupTable > tr:not(:first-child) > td {
-  padding-top: 0.5em; /* add a spacing between the rows */
-}
-
-#startupTable > tr > .label-cell {
-  text-align: end;
-  width: 0; /* make the column as small as possible */
-}
-
-#startupTable > tr > .label-cell > label {
-  white-space: nowrap;
-}
-
-#startupTable > tr > .content-cell > menulist,
-#startupTable > tr > .content-cell > textbox {
-  width: calc(100% - 8px);
-  margin-left: 4px;
-  margin-right: 4px;
-}
-
-#startupTable > tr > .homepage-buttons {
-  display: flex;
-  flex-wrap: wrap;
-}
-
-#startupTable > tr > .homepage-buttons > .content-cell-item {
-  flex-grow: 1;
-}
-
-#useFirefoxSync  {
-  font-size: 90%;
-  margin-inline-end: 8px !important;
-}
-
-#getStarted {
-  font-size: 90%;
-}
-
-#isNotDefaultLabel {
-  font-weight: bold;
-}
-
-#downloadFolder {
-  margin-inline-start: 0;
-}
-
-#browserHomePage:-moz-locale-dir(rtl) input {
-  unicode-bidi: plaintext;
-  direction: rtl;
-}
-
-/* Content pane */
-#playDRMContentLink {
-  /* Line up with the buttons in the other grid bits: */
-  margin-left: 4px !important;
-  margin-right: 4px !important;
-}
-
-#notificationsPolicyLearnMore {
-  margin-inline-start: 1.5em !important;
-}
-
-#defaultFontSizeLabel {
-  /* !important needed to override common !important rule */
-  margin-inline-start: 4px !important;
-}
-
-/* Applications Pane Styles */
-
-#applicationsContent {
-  padding: 15px 0;
-}
-
-#filter {
-  margin-inline-start: 0;
-}
-
-#handlersView {
-  height: 25em;
-}
-
-#handlersView > richlistitem {
-  min-height: 36px !important;
-}
-
-.typeIcon {
-  margin-inline-start: 10px !important;
-  margin-inline-end: 9px !important;
-}
-
-.actionIcon {
-  margin-inline-start: 11px !important;
-  margin-inline-end: 8px !important;
-}
-
-.actionsMenu {
-  min-height: 36px;
-}
-
-.actionsMenu > menupopup > menuitem {
-  padding-inline-start: 10px !important;
-}
-
-.actionsMenu > menupopup > menuitem > .menu-iconic-left {
-  margin-inline-end: 8px !important;
-}
-
-/* Privacy pane */
-
-#trackingProtectionPBMLearnMore,
-#trackingProtectionLearnMore,
-#browserContainersLearnMore {
-  margin-inline-start: 1.5em !important;
-  margin-top: 0;
-  font-weight: normal;
-}
-
-.doNotTrackLearnMore {
-  margin-inline-start: calc(1em + 30px);
-  margin-bottom: 1em;
-  font-weight: normal;
-}
-
-.doNotTrackLearnMore > label {
-  font-size: 1em !important;
-  margin-left: 0;
-}
-
-/* Collapse the non-active vboxes in decks to use only the height the
-   active vbox needs */
-#historyPane:not([selectedIndex="1"]) > #historyDontRememberPane,
-#historyPane:not([selectedIndex="2"]) > #historyCustomPane,
-#weavePrefsDeck:not([selectedIndex="1"]) > #hasAccount,
-#weavePrefsDeck:not([selectedIndex="2"]) > #needsUpdate,
-#weavePrefsDeck:not([selectedIndex="3"]) > #noFxaAccount,
-#weavePrefsDeck:not([selectedIndex="4"]) > #hasFxaAccount,
-#fxaLoginStatus:not([selectedIndex="1"]) > #fxaLoginUnverified,
-#fxaLoginStatus:not([selectedIndex="2"]) > #fxaLoginRejected {
-  visibility: collapse;
-}
-
-/* XXX This style is for bug 740213 and should be removed once that
-   bug has a solution. */
-description > html|a {
-  cursor: pointer;
-}
-
-#weavePrefsDeck > vbox > label,
-#weavePrefsDeck > vbox > groupbox,
-#weavePrefsDeck > vbox > description,
-#weavePrefsDeck > vbox > #pairDevice > label,
-#weavePrefsDeck > #needsUpdate > hbox > #loginError,
-#weavePrefsDeck > #hasFxaAccount > vbox > label,
-#weavePrefsDeck > #hasFxaAccount > hbox:not(#tosPP-normal) > label {
-  /* no margin-inline-start for elements at the beginning of a line */
-  margin-inline-start: 0;
-}
-
-#tabsElement {
-  margin-inline-end: 4px; /* add the 4px end-margin of other elements */
-}
-
-#telemetryLearnMore,
-#FHRLearnMore,
-#crashReporterLearnMore {
-  /* provide some margin between the links and the label text */
-  /* !important is needed to override the rules defined in common.css */
-  margin-inline-start: 20px !important;
-  /* center the links */
-  margin-top: 8px;
-  margin-bottom: 8px;
-}
-
-.indent {
-  /* !important needed to override margin-inline-start:0 !important; rule
-     define in common.css for labels */
-  margin-inline-start: 33px !important;
-}
-
-.text-link {
-  margin-bottom: 0;
-}
-
-#showUpdateHistory {
-  margin-inline-start: 0;
-}
-
-/**
- * Dialog
- */
-
-#dialogOverlay {
-  background-color: rgba(0,0,0,0.5);
-  visibility: hidden;
-}
-
-#dialogBox {
-  background-color: #fbfbfb;
-  background-clip: content-box;
-  color: #424e5a;
-  font-size: 14px;
-  /* `transparent` will use the dialogText color in high-contrast themes and
-     when page colors are disabled */
-  border: 1px solid transparent;
-  border-radius: 3.5px;
-  box-shadow: 0 2px 6px 0 rgba(0,0,0,0.3);
-  display: -moz-box;
-  margin: 0;
-  padding: 0;
-}
-
-#dialogBox[resizable="true"] {
-  resize: both;
-  overflow: hidden;
-  min-height: 20em;
-  min-width: 66ch;
-}
-
-#dialogBox > .groupbox-title {
-  padding: 3.5px 0;
-  background-color: #F1F1F1;
-  border-bottom: 1px solid #C1C1C1;
-}
-
-#dialogTitle {
-  text-align: center;
-  -moz-user-select: none;
-}
-
-.close-icon {
-  background-color: transparent !important;
-  border: none;
-  box-shadow: none;
-  padding: 0;
-  height: auto;
-  min-height: 16px;
-  min-width: 0;
-}
-
-#dialogBox > .groupbox-body {
-  -moz-appearance: none;
-  padding: 20px;
-}
-
-#dialogFrame {
-  -moz-box-flex: 1;
-  /* Default dialog dimensions */
-  width: 66ch;
-}
-
-.largeDialogContainer.doScroll {
-  overflow-y: auto;
-  -moz-box-flex: 1;
-}
-
-/**
- * End Dialog
- */
-
-/**
- * Font dialog menulist fixes
- */
-
-#defaultFontType,
-#serif,
-#sans-serif,
-#monospace {
-  min-width: 30ch;
-}
-
-/**
- * Sync
- */
-
-#fxaProfileImage {
-  max-width: 60px;
-  border-radius: 50%;
-  list-style-image: url(chrome://browser/skin/fxa/default-avatar.svg);
-  margin-inline-end: 15px;
-  image-rendering: -moz-crisp-edges;
-}
-
-#fxaLoginStatus[hasName] #fxaProfileImage {
-  max-width: 80px;
-}
-
-#fxaProfileImage.actionable {
-  cursor: pointer;
-}
-
-#fxaProfileImage.actionable:hover {
-  box-shadow: 0px 0px 0px 1px #0095DD;
-}
-
-#fxaProfileImage.actionable:hover:active {
-  box-shadow: 0px 0px 0px 1px #ff9500;
-}
-
-#noFxaAccount {
-  /* Overriding the margins from the base preferences.css theme file.
-     These overrides can be simplified by fixing bug 1027174 */
-  margin: 0;
-  padding-top: 15px;
-}
-
-#fxaContentWrapper {
-  -moz-box-flex: 1;
-}
-
-#noFxaGroup {
-  -moz-box-flex: 1;
-  margin: 0;
-}
-
-#fxaContentWrapper {
-  padding-right: 15px;
-}
-
-#noFxaGroup > vbox,
-#fxaGroup {
-  -moz-box-align: start;
-}
-
-#fxaSyncEngines > vbox:first-child {
-  margin-right: 80px;
-}
-
-#fxaSyncComputerName {
-  margin-inline-start: 0px;
-  -moz-box-flex: 1;
-}
-
-#tosPP-small-ToS {
-  margin-bottom: 14px;
-}
-
-#noFxaCaption {
-  font-weight: bold;
-  margin-bottom: 11px;
-}
-
-.fxaSyncIllustration {
-  margin-top: 35px;
-}
-
-#syncOptions caption {
-  margin-bottom: 11px;
-}
-
-#fxaDeviceName {
-  margin-bottom: 27.5px;
-}
-
-#noFxaDescription {
-  margin-bottom: 20px !important;
-}
-
-.separator {
-  border-bottom: 1px solid var(--in-content-header-border-color);
-}
-
-.fxaAccountBox {
-  border: 1px solid #D1D2D3;
-  border-radius: 5px;
-  padding: 14px 20px 14px 14px;
-}
-
-#signedOutAccountBoxTitle {
-  font-weight: bold;
-}
-
-.fxaAccountBoxButtons {
-  margin-bottom: 0 !important;
-  margin-top: 11px;
-  display: flex;
-  align-items: center;
-}
-
-.fxaAccountBoxButtons > * {
-  -moz-box-flex: 1;
-}
-
-.fxaAccountBoxButtons > button {
-  text-align: center;
-  padding-left: 11px;
-  padding-right: 11px;
-  margin: 0;
-  min-width: 0;
-}
-
-.fxaAccountBoxButtons > button:first-child {
-  margin-right: 14px !important;
-}
-
-.fxaSyncIllustration {
-  width: 231px;
-  list-style-image: url(chrome://browser/skin/fxa/sync-illustration.png)
-}
-
-#fxaLoginStatus[hasName] #fxaEmailAddress1 {
-  font-size: 1.1rem;
-}
-
-#fxaEmailAddress1,
-#fxaEmailAddress2,
-#fxaEmailAddress3 {
-  word-break: break-all;
-}
-
-.fxaFirefoxLogo {
-  list-style-image: url(chrome://browser/skin/fxa/logo.png);
-  max-width: 64px;
-  margin-inline-end: 14px;
-}
-
-.fxaMobilePromo {
-  margin-bottom: 20px;
-  margin-top: 25px;
-}
-
-#fxaLoginRejectedWarning {
-  list-style-image: url(chrome://browser/skin/warning.svg);
-  filter: drop-shadow(0 1px 0 hsla(206, 50%, 10%, .15));
-  margin: 4px 8px 0px 0px;
-}
-
-#syncOptions {
-  margin-bottom: 27.5px;
-}
-
-.androidLink {
-  background-image: url("chrome://browser/skin/fxa/android.png");
-}
-
-.iOSLink {
-  background-image: url("chrome://browser/skin/fxa/ios.png");
-}
-
-.androidLink,
-.iOSLink {
-  margin: 0 0 0 2px;
-  padding-left: 28px;
-  padding-top: 6px;
-  height: 28px;
-  background-repeat: no-repeat;
-  background-size: 24px 28px;
-}
-
-#tosPP-small {
-  margin-top: 20px;
-  margin-bottom: 20px;
-}
-
-@media (min-resolution: 1.1dppx) {
-  .androidLink {
-    background-image: url("chrome://browser/skin/fxa/android@2x.png");
-  }
-  .iOSLink {
-    background-image: url("chrome://browser/skin/fxa/ios@2x.png");
-  }
-  .fxaSyncIllustration {
-    list-style-image: url(chrome://browser/skin/fxa/sync-illustration@2x.png)
-  }
-  .fxaFirefoxLogo {
-    list-style-image: url(chrome://browser/skin/fxa/logo@2x.png);
-  }
-}
diff --git a/browser/themes/shared/incontentprefs/search.css b/browser/themes/shared/incontentprefs/search.css
deleted file mode 100644
index f3c206b41..000000000
--- a/browser/themes/shared/incontentprefs/search.css
+++ /dev/null
@@ -1,49 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
- #defaultEngine {
-   margin-inline-start: 0;
- }
-
-#defaultEngine > .menulist-label-box > .menulist-icon {
-  height: 16px;
-}
-
-/* work around a display: none in Linux's menu.css, see bug 1112310 */
-.searchengine-menuitem > .menu-iconic-left {
-  display: -moz-box;
-}
-
-#engineList {
-  margin: .5em 0;
-}
-
-#engineList treechildren::-moz-tree-image(engineName) {
-  margin-inline-end: 10px;
-  margin-inline-start: 1px;
-  width: 16px;
-  height: 16px;
-}
-
-#engineList treechildren::-moz-tree-drop-feedback {
-  background-color: Highlight;
-  width: 10000px; /* 100% doesn't work; 10k is hopefully larger than any window
-                     we may have, overflow isn't visible. */
-  height: 2px;
-  margin-inline-start: 0;
-}
-
-#engineShown {
-  min-width: 26px;
-}
-
-#addEnginesBox {
-  margin-bottom: 1em;
-}
-
-#removeEngineButton,
-#restoreDefaultSearchEngines {
-  margin-right: 0;
-  margin-left: 0;
-}
diff --git a/browser/themes/shared/info.svg b/browser/themes/shared/info.svg
deleted file mode 100644
index 9ff38dd68..000000000
--- a/browser/themes/shared/info.svg
+++ /dev/null
@@ -1,9 +0,0 @@
-<?xml version="1.0"?>
-<!-- This Source Code Form is subject to the terms of the Mozilla Public
-   - License, v. 2.0. If a copy of the MPL was not distributed with this
-   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
-<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 16 16">
-  <circle fill="#00a1f2" cx="8" cy="8" r="8" />
-  <circle fill="#fff" cx="8" cy="4" r="1.25" />
-  <rect x="7" y="7" width="2" height="6" rx="1" ry="1" fill="#fff" />
-</svg>
diff --git a/browser/themes/shared/jar.inc.mn b/browser/themes/shared/jar.inc.mn
deleted file mode 100644
index 588cf5364..000000000
--- a/browser/themes/shared/jar.inc.mn
+++ /dev/null
@@ -1,148 +0,0 @@
-# This Source Code Form is subject to the terms of the Mozilla Public
-# License, v. 2.0. If a copy of the MPL was not distributed with this
-# file, You can obtain one at http://mozilla.org/MPL/2.0/.
-
-# This is not a complete / proper jar manifest. It is included by the
-# actual theme-specific manifests, so that shared resources need only
-# be specified once. As a result, the source file paths are relative
-# to the location of the actual manifest.
-
-  skin/classic/browser/aboutNetError.css                       (../shared/aboutNetError.css)
-  skin/classic/browser/blockedSite.css                         (../shared/blockedSite.css)
-  skin/classic/browser/error-pages.css                         (../shared/error-pages.css)
-* skin/classic/browser/aboutSessionRestore.css                 (../shared/aboutSessionRestore.css)
-  skin/classic/browser/aboutTabCrashed.css                     (../shared/aboutTabCrashed.css)
-  skin/classic/browser/aboutWelcomeBack.css                    (../shared/aboutWelcomeBack.css)
-  skin/classic/browser/content-contextmenu.svg                 (../shared/content-contextmenu.svg)
-  skin/classic/browser/addons/addon-install-blocked.svg        (../shared/addons/addon-install-blocked.svg)
-  skin/classic/browser/addons/addon-install-confirm.svg        (../shared/addons/addon-install-confirm.svg)
-  skin/classic/browser/addons/addon-install-downloading.svg    (../shared/addons/addon-install-downloading.svg)
-  skin/classic/browser/addons/addon-install-error.svg          (../shared/addons/addon-install-error.svg)
-  skin/classic/browser/addons/addon-install-installed.svg      (../shared/addons/addon-install-installed.svg)
-  skin/classic/browser/addons/addon-install-restart.svg        (../shared/addons/addon-install-restart.svg)
-  skin/classic/browser/addons/addon-install-warning.svg        (../shared/addons/addon-install-warning.svg)
-* skin/classic/browser/addons/addon-install-anchor.svg         (../shared/addons/addon-install-anchor.svg)
-* skin/classic/browser/controlcenter/arrow-subview.svg         (../shared/controlcenter/arrow-subview.svg)
-* skin/classic/browser/controlcenter/arrow-subview-back.svg    (../shared/controlcenter/arrow-subview-back.svg)
-* skin/classic/browser/controlcenter/conn-not-secure.svg       (../shared/controlcenter/conn-not-secure.svg)
-* skin/classic/browser/controlcenter/connection.svg            (../shared/controlcenter/connection.svg)
-* skin/classic/browser/controlcenter/mcb-disabled.svg          (../shared/controlcenter/mcb-disabled.svg)
-* skin/classic/browser/controlcenter/permissions.svg           (../shared/controlcenter/permissions.svg)
-* skin/classic/browser/controlcenter/tracking-protection.svg   (../shared/controlcenter/tracking-protection.svg)
-  skin/classic/browser/controlcenter/warning-gray.svg          (../shared/controlcenter/warning-gray.svg)
-  skin/classic/browser/controlcenter/warning-yellow.svg        (../shared/controlcenter/warning-yellow.svg)
-  skin/classic/browser/customizableui/customizeFavicon.ico     (../shared/customizableui/customizeFavicon.ico)
-  skin/classic/browser/customizableui/customize-illustration.png  (../shared/customizableui/customize-illustration.png)
-  skin/classic/browser/customizableui/customize-illustration@2x.png  (../shared/customizableui/customize-illustration@2x.png)
-  skin/classic/browser/customizableui/customize-illustration-rtl.png  (../shared/customizableui/customize-illustration-rtl.png)
-  skin/classic/browser/customizableui/customize-illustration-rtl@2x.png  (../shared/customizableui/customize-illustration-rtl@2x.png)
-  skin/classic/browser/customizableui/info-icon-customizeTip.png  (../shared/customizableui/info-icon-customizeTip.png)
-  skin/classic/browser/customizableui/info-icon-customizeTip@2x.png  (../shared/customizableui/info-icon-customizeTip@2x.png)
-  skin/classic/browser/customizableui/menuPanel-customizeFinish.png  (../shared/customizableui/menuPanel-customizeFinish.png)
-  skin/classic/browser/customizableui/menuPanel-customizeFinish@2x.png  (../shared/customizableui/menuPanel-customizeFinish@2x.png)
-  skin/classic/browser/customizableui/panelarrow-customizeTip.png  (../shared/customizableui/panelarrow-customizeTip.png)
-  skin/classic/browser/customizableui/panelarrow-customizeTip@2x.png  (../shared/customizableui/panelarrow-customizeTip@2x.png)
-  skin/classic/browser/customizableui/subView-arrow-back-inverted.png  (../shared/customizableui/subView-arrow-back-inverted.png)
-  skin/classic/browser/customizableui/subView-arrow-back-inverted@2x.png  (../shared/customizableui/subView-arrow-back-inverted@2x.png)
-  skin/classic/browser/customizableui/subView-arrow-back-inverted-rtl.png  (../shared/customizableui/subView-arrow-back-inverted-rtl.png)
-  skin/classic/browser/customizableui/subView-arrow-back-inverted-rtl@2x.png  (../shared/customizableui/subView-arrow-back-inverted-rtl@2x.png)
-  skin/classic/browser/downloads/contentAreaDownloadsView.css  (../shared/downloads/contentAreaDownloadsView.css)
-  skin/classic/browser/downloads/download-blocked.svg          (../shared/downloads/download-blocked.svg)
-  skin/classic/browser/downloads/menubutton-dropmarker.svg     (../shared/downloads/menubutton-dropmarker.svg)
-  skin/classic/browser/downloads/download-summary.svg          (../shared/downloads/download-summary.svg)
-  skin/classic/browser/drm-icon.svg                            (../shared/drm-icon.svg)
-  skin/classic/browser/filters.svg                             (../shared/filters.svg)
-  skin/classic/browser/fullscreen/insecure.svg                 (../shared/fullscreen/insecure.svg)
-  skin/classic/browser/fullscreen/secure.svg                   (../shared/fullscreen/secure.svg)
-  skin/classic/browser/heartbeat-icon.svg                      (../shared/heartbeat-icon.svg)
-  skin/classic/browser/heartbeat-star-lit.svg                  (../shared/heartbeat-star-lit.svg)
-  skin/classic/browser/heartbeat-star-off.svg                  (../shared/heartbeat-star-off.svg)
-  skin/classic/browser/connection-secure.svg                   (../shared/identity-block/connection-secure.svg)
-* skin/classic/browser/connection-mixed-passive-loaded.svg     (../shared/identity-block/connection-mixed-passive-loaded.svg)
-* skin/classic/browser/connection-mixed-active-loaded.svg      (../shared/identity-block/connection-mixed-active-loaded.svg)
-* skin/classic/browser/identity-icon.svg                       (../shared/identity-block/identity-icon.svg)
-  skin/classic/browser/info.svg                                (../shared/info.svg)
-* skin/classic/browser/menuPanel.svg                           (../shared/menuPanel.svg)
-* skin/classic/browser/menuPanel-small.svg                     (../shared/menuPanel-small.svg)
-* skin/classic/browser/notification-icons.svg                  (../shared/notification-icons.svg)
-* skin/classic/browser/tracking-protection-16.svg              (../shared/identity-block/tracking-protection-16.svg)
-  skin/classic/browser/newtab/close.png                        (../shared/newtab/close.png)
-  skin/classic/browser/newtab/controls.svg                     (../shared/newtab/controls.svg)
-  skin/classic/browser/newtab/whimsycorn.png                   (../shared/newtab/whimsycorn.png)
-  skin/classic/browser/panel-icons.svg                         (../shared/panel-icons.svg)
-  skin/classic/browser/preferences/in-content/favicon.ico      (../shared/incontentprefs/favicon.ico)
-  skin/classic/browser/preferences/in-content/icons.svg        (../shared/incontentprefs/icons.svg)
-  skin/classic/browser/preferences/in-content/search.css       (../shared/incontentprefs/search.css)
-* skin/classic/browser/preferences/in-content/containers.css   (../shared/incontentprefs/containers.css)
-* skin/classic/browser/preferences/containers.css              (../shared/preferences/containers.css)
-  skin/classic/browser/fxa/default-avatar.svg                  (../shared/fxa/default-avatar.svg)
-  skin/classic/browser/fxa/logo.png                            (../shared/fxa/logo.png)
-  skin/classic/browser/fxa/logo@2x.png                         (../shared/fxa/logo@2x.png)
-  skin/classic/browser/fxa/sync-illustration.png               (../shared/fxa/sync-illustration.png)
-  skin/classic/browser/fxa/sync-illustration@2x.png            (../shared/fxa/sync-illustration@2x.png)
-  skin/classic/browser/fxa/sync-illustration.svg               (../shared/fxa/sync-illustration.svg)
-  skin/classic/browser/fxa/android.png                         (../shared/fxa/android.png)
-  skin/classic/browser/fxa/android@2x.png                      (../shared/fxa/android@2x.png)
-  skin/classic/browser/fxa/ios.png                             (../shared/fxa/ios.png)
-  skin/classic/browser/fxa/ios@2x.png                          (../shared/fxa/ios@2x.png)
-  skin/classic/browser/search-indicator.png                    (../shared/search/search-indicator.png)
-  skin/classic/browser/search-indicator@2x.png                 (../shared/search/search-indicator@2x.png)
-  skin/classic/browser/search-engine-placeholder.png           (../shared/search/search-engine-placeholder.png)
-  skin/classic/browser/search-engine-placeholder@2x.png        (../shared/search/search-engine-placeholder@2x.png)
-  skin/classic/browser/searchReset.css                         (../shared/searchReset.css)
-  skin/classic/browser/badge-add-engine.png                    (../shared/search/badge-add-engine.png)
-  skin/classic/browser/badge-add-engine@2x.png                 (../shared/search/badge-add-engine@2x.png)
-  skin/classic/browser/search-indicator-badge-add.png          (../shared/search/search-indicator-badge-add.png)
-  skin/classic/browser/search-indicator-badge-add@2x.png       (../shared/search/search-indicator-badge-add@2x.png)
-  skin/classic/browser/search-history-icon.svg                 (../shared/search/history-icon.svg)
-  skin/classic/browser/search-indicator-magnifying-glass.svg   (../shared/search/search-indicator-magnifying-glass.svg)
-  skin/classic/browser/search-arrow-go.svg                     (../shared/search/search-arrow-go.svg)
-  skin/classic/browser/gear.svg                                (../shared/search/gear.svg)
-  skin/classic/browser/tabbrowser/connecting.png               (../shared/tabbrowser/connecting.png)
-  skin/classic/browser/tabbrowser/connecting@2x.png            (../shared/tabbrowser/connecting@2x.png)
-  skin/classic/browser/tabbrowser/crashed.svg                  (../shared/tabbrowser/crashed.svg)
-  skin/classic/browser/tabbrowser/pendingpaint.png             (../shared/tabbrowser/pendingpaint.png)
-  skin/classic/browser/tabbrowser/tab-audio.svg                (../shared/tabbrowser/tab-audio.svg)
-  skin/classic/browser/tabbrowser/tab-audio-small.svg          (../shared/tabbrowser/tab-audio-small.svg)
-  skin/classic/browser/tabbrowser/tab-overflow-indicator.png   (../shared/tabbrowser/tab-overflow-indicator.png)
-  skin/classic/browser/theme-switcher-icon.png                 (../shared/theme-switcher-icon.png)
-  skin/classic/browser/theme-switcher-icon@2x.png              (../shared/theme-switcher-icon@2x.png)
-  skin/classic/browser/toolbarbutton-dropdown-arrow.png        (../shared/toolbarbutton-dropdown-arrow.png)
-  skin/classic/browser/translating-16.png                      (../shared/translation/translating-16.png)
-  skin/classic/browser/translating-16@2x.png                   (../shared/translation/translating-16@2x.png)
-  skin/classic/browser/translation-16.png                      (../shared/translation/translation-16.png)
-  skin/classic/browser/translation-16@2x.png                   (../shared/translation/translation-16@2x.png)
-  skin/classic/browser/undoCloseTab.png                        (../shared/undoCloseTab.png)
-  skin/classic/browser/undoCloseTab@2x.png                     (../shared/undoCloseTab@2x.png)
-  skin/classic/browser/update-badge.svg                        (../shared/update-badge.svg)
-  skin/classic/browser/update-badge-failed.svg                 (../shared/update-badge-failed.svg)
-  skin/classic/browser/warning.svg                             (../shared/warning.svg)
-  skin/classic/browser/warning-white.svg                       (../shared/warning-white.svg)
-  skin/classic/browser/cert-error.svg                          (../shared/incontent-icons/cert-error.svg)
-  skin/classic/browser/wifi.svg                                (../shared/incontent-icons/wifi.svg)
-  skin/classic/browser/session-restore.svg                     (../shared/incontent-icons/session-restore.svg)
-  skin/classic/browser/tab-crashed.svg                         (../shared/incontent-icons/tab-crashed.svg)
-  skin/classic/browser/favicon-search-16.svg                   (../shared/favicon-search-16.svg)
-  skin/classic/browser/icon-search-64.svg                      (../shared/incontent-icons/icon-search-64.svg)
-  skin/classic/browser/welcome-back.svg                        (../shared/incontent-icons/welcome-back.svg)
-  skin/classic/browser/reader-tour.png                         (../shared/reader/reader-tour.png)
-  skin/classic/browser/reader-tour@2x.png                      (../shared/reader/reader-tour@2x.png)
-  skin/classic/browser/readerMode.svg                          (../shared/reader/readerMode.svg)
-  skin/classic/browser/webRTC-camera-white-16.png              (../shared/webrtc/camera-white-16.png)
-  skin/classic/browser/webRTC-microphone-white-16.png          (../shared/webrtc/microphone-white-16.png)
-  skin/classic/browser/webRTC-screen-white-16.png              (../shared/webrtc/screen-white-16.png)
-  skin/classic/browser/panic-panel/header.png                  (../shared/panic-panel/header.png)
-  skin/classic/browser/panic-panel/header@2x.png               (../shared/panic-panel/header@2x.png)
-  skin/classic/browser/panic-panel/header-small.png            (../shared/panic-panel/header-small.png)
-  skin/classic/browser/panic-panel/header-small@2x.png         (../shared/panic-panel/header-small@2x.png)
-  skin/classic/browser/panic-panel/icons.png                   (../shared/panic-panel/icons.png)
-  skin/classic/browser/panic-panel/icons@2x.png                (../shared/panic-panel/icons@2x.png)
-  skin/classic/browser/privatebrowsing/aboutPrivateBrowsing.css (../shared/privatebrowsing/aboutPrivateBrowsing.css)
-  skin/classic/browser/privatebrowsing/check.svg               (../shared/privatebrowsing/check.svg)
-  skin/classic/browser/privatebrowsing/favicon.svg             (../shared/privatebrowsing/favicon.svg)
-  skin/classic/browser/privatebrowsing/private-browsing.svg    (../shared/privatebrowsing/private-browsing.svg)
-  skin/classic/browser/privatebrowsing/tracking-protection-off.svg (../shared/privatebrowsing/tracking-protection-off.svg)
-  skin/classic/browser/privatebrowsing/tracking-protection.svg (../shared/privatebrowsing/tracking-protection.svg)
-  skin/classic/browser/devedition/urlbar-history-dropmarker.svg (../shared/devedition/urlbar-history-dropmarker.svg)
-  skin/classic/browser/urlbar-star.svg                         (../shared/urlbar-star.svg)
-  skin/classic/browser/urlbar-tab.svg                          (../shared/urlbar-tab.svg)
diff --git a/browser/themes/shared/menuPanel-small.svg b/browser/themes/shared/menuPanel-small.svg
deleted file mode 100644
index db28992e2..000000000
--- a/browser/themes/shared/menuPanel-small.svg
+++ /dev/null
@@ -1,16 +0,0 @@
-<?xml version="1.0"?>
-<!-- This Source Code Form is subject to the terms of the Mozilla Public
-   - License, v. 2.0. If a copy of the MPL was not distributed with this
-   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
-<svg xmlns="http://www.w3.org/2000/svg"
-     width="96" height="16" viewBox="0 0 96 16"
-     class="fieldtext">
-#include icon-colors.inc.svg
-
-  <path id="placeholder" d="M8,16a8,8,0,1,1,8-8A8,8,0,0,1,8,16ZM12,4H4v8h8V4ZM5,9.939V6.061L6.939,8ZM9.939,11H6.061L8,9.061ZM11,11h0Zm0-4.939V9.939L9.061,8ZM11,5h0ZM6.061,5H9.939L8,6.939Z"/>
-  <path id="cut" d="M29.63,15a2.426,2.426,0,0,1-2.282-1.277c-0.761-1.109-1.694-2.488-1.694-2.488S25,10.329,24.549,9.623a1.05,1.05,0,0,0-1.106-.538S20.6,4.437,20.124,3.706C19.465,2.689,20.7,1,20.7,1l4.4,7.044a19.333,19.333,0,0,0,1.867,2.286c0.519,0.4,1.382-.373,2.8.908C31.7,12.984,31.048,15,29.63,15ZM29.423,12.11c-0.933-1.042-1.728-.908-1.936-0.639a2.093,2.093,0,0,0,.38,1.748,1.612,1.612,0,0,0,1.383.74C29.838,13.959,30.356,13.153,29.423,12.11ZM25.582,7.372L24.4,5.6,27.276,1s1.233,1.69.575,2.708C27.568,4.142,26.445,5.967,25.582,7.372Zm-4.576,2.956A12.482,12.482,0,0,0,22.43,8.645l0.826,1.239c-0.428.65-.937,1.352-0.937,1.352s-0.933,1.378-1.694,2.488A2.426,2.426,0,0,1,18.344,15c-1.417,0-2.074-2.017-.138-3.765C19.624,9.956,20.487,10.732,21.006,10.329ZM18.551,12.11c-0.933,1.042-.415,1.849.173,1.849a1.612,1.612,0,0,0,1.383-.74,2.093,2.093,0,0,0,.38-1.748C20.28,11.2,19.485,11.068,18.551,12.11Z"/>
-  <path id="copy" d="M46,15H40a1,1,0,0,1-1-1V6a1,1,0,0,1,1-1h4.953C45,5,47,6.984,47,7.047V14A1,1,0,0,1,46,15ZM44,6V8h2ZM38,4.886V11H34a1,1,0,0,1-1-1V2a1,1,0,0,1,1-1h4.953C39,1,41,2.985,41,3.047v1.34H38.5A0.5,0.5,0,0,0,38,4.886ZM38,2V4h2Z"/>
-  <path id="paste" d="M59.5,15h-7A1.5,1.5,0,0,1,51,13.5v-9A1.5,1.5,0,0,1,52.5,3H54a2,2,0,1,1,4,0h1.5A1.5,1.5,0,0,1,61,4.5v9A1.5,1.5,0,0,1,59.5,15ZM58.682,4L57.61,3.5a1.613,1.613,0,0,0-3.219,0L53.318,4,52.781,5h6.437ZM58.82,5.688H54.074L51.059,7.428l2.849,4.935,6.574-3.8Z"/>
-  <rect id="zoomOut" x="67" y="7" width="10" height="2"/>
-  <path id="zoomIn" d="M93,9H89v4H87V9H83V7h4V3h2V7h4V9Z"/>
-</svg>
diff --git a/browser/themes/shared/menuPanel.svg b/browser/themes/shared/menuPanel.svg
deleted file mode 100644
index e20f0197c..000000000
--- a/browser/themes/shared/menuPanel.svg
+++ /dev/null
@@ -1,42 +0,0 @@
-<?xml version="1.0"?>
-<!-- This Source Code Form is subject to the terms of the Mozilla Public
-   - License, v. 2.0. If a copy of the MPL was not distributed with this
-   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
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diff --git a/browser/themes/shared/menupanel.inc.css b/browser/themes/shared/menupanel.inc.css
deleted file mode 100644
index 266e1c83e..000000000
--- a/browser/themes/shared/menupanel.inc.css
+++ /dev/null
@@ -1,173 +0,0 @@
-/* Menu panel and palette styles */
-
-toolbaritem[sdkstylewidget="true"] > toolbarbutton,
-:-moz-any(@primaryToolbarButtons@)[cui-areatype="menu-panel"],
-toolbarpaletteitem[place="palette"] > :-moz-any(@primaryToolbarButtons@) {
-  list-style-image: url(chrome://browser/skin/menuPanel.svg);
-}
-
-:-moz-any(@primaryToolbarButtons@)[cui-areatype="menu-panel"][panel-multiview-anchor=true] > .toolbarbutton-icon,
-:-moz-any(@primaryToolbarButtons@)[cui-areatype="menu-panel"][panel-multiview-anchor=true] > .toolbarbutton-badge-stack > .toolbarbutton-icon,
-:-moz-any(@primaryToolbarButtons@)[cui-areatype="menu-panel"][panel-multiview-anchor=true] > .toolbarbutton-menubutton-button > .toolbarbutton-icon {
-  filter: url(chrome://browser/skin/filters.svg#fill);
-  fill: currentColor;
-}
-
-#home-button[cui-areatype="menu-panel"],
-toolbarpaletteitem[place="palette"] > #home-button {
-  -moz-image-region: rect(0px, 128px, 32px, 96px);
-}
-
-#bookmarks-menu-button[cui-areatype="menu-panel"],
-toolbarpaletteitem[place="palette"] > #bookmarks-menu-button {
-  -moz-image-region: rect(0px, 192px, 32px, 160px);
-}
-
-#history-panelmenu[cui-areatype="menu-panel"],
-toolbarpaletteitem[place="palette"] > #history-panelmenu {
-  -moz-image-region: rect(0px, 224px, 32px, 192px);
-}
-
-#downloads-button[cui-areatype="menu-panel"],
-toolbarpaletteitem[place="palette"] > #downloads-button {
-  -moz-image-region: rect(0px, 256px, 32px, 224px);
-}
-
-#add-ons-button[cui-areatype="menu-panel"],
-toolbarpaletteitem[place="palette"] > #add-ons-button {
-  -moz-image-region: rect(0px, 288px, 32px, 256px);
-}
-
-#open-file-button[cui-areatype="menu-panel"],
-toolbarpaletteitem[place="palette"] > #open-file-button {
-  -moz-image-region: rect(0px, 320px, 32px, 288px);
-}
-
-#save-page-button[cui-areatype="menu-panel"],
-toolbarpaletteitem[place="palette"] > #save-page-button {
-  -moz-image-region: rect(0px, 352px, 32px, 320px);
-}
-
-#sync-button[cui-areatype="menu-panel"],
-toolbarpaletteitem[place="palette"] > #sync-button {
-  -moz-image-region: rect(0px, 1024px, 32px, 992px);
-}
-
-#containers-panelmenu[cui-areatype="menu-panel"],
-toolbarpaletteitem[place="palette"] > #containers-panelmenu {
-  -moz-image-region: rect(0px, 1056px, 32px, 1024px);
-}
-
-#feed-button[cui-areatype="menu-panel"],
-toolbarpaletteitem[place="palette"] > #feed-button {
-  -moz-image-region: rect(0px, 416px, 32px, 384px);
-}
-
-#characterencoding-button[cui-areatype="menu-panel"],
-toolbarpaletteitem[place="palette"] > #characterencoding-button {
-  -moz-image-region: rect(0px, 480px, 32px, 448px);
-}
-
-#new-window-button[cui-areatype="menu-panel"],
-toolbarpaletteitem[place="palette"] > #new-window-button {
-  -moz-image-region: rect(0px, 512px, 32px, 480px);
-}
-
-#e10s-button[cui-areatype="menu-panel"],
-toolbarpaletteitem[place="palette"] > #e10s-button {
-  -moz-image-region: rect(0px, 512px, 32px, 480px);
-}
-
-#new-tab-button[cui-areatype="menu-panel"],
-toolbarpaletteitem[place="palette"] > #new-tab-button {
-  -moz-image-region: rect(0px, 544px, 32px, 512px);
-}
-
-#privatebrowsing-button[cui-areatype="menu-panel"],
-toolbarpaletteitem[place="palette"] > #privatebrowsing-button {
-  -moz-image-region: rect(0px, 576px, 32px, 544px);
-}
-
-#find-button[cui-areatype="menu-panel"],
-toolbarpaletteitem[place="palette"] > #find-button {
-  -moz-image-region: rect(0px, 640px, 32px, 608px);
-}
-
-#print-button[cui-areatype="menu-panel"],
-toolbarpaletteitem[place="palette"] > #print-button {
-  -moz-image-region: rect(0px, 672px, 32px, 640px);
-}
-
-#fullscreen-button[cui-areatype="menu-panel"],
-toolbarpaletteitem[place="palette"] > #fullscreen-button {
-  -moz-image-region: rect(0px, 704px, 32px, 672px);
-}
-
-#developer-button[cui-areatype="menu-panel"],
-toolbarpaletteitem[place="palette"] > #developer-button {
-  -moz-image-region: rect(0px, 736px, 32px, 704px);
-}
-
-#preferences-button[cui-areatype="menu-panel"],
-toolbarpaletteitem[place="palette"] > #preferences-button {
-  -moz-image-region: rect(0px, 768px, 32px, 736px);
-}
-
-#email-link-button[cui-areatype="menu-panel"],
-toolbarpaletteitem[place="palette"] > #email-link-button {
-  -moz-image-region: rect(0, 800px, 32px, 768px);
-}
-
-#sidebar-button[cui-areatype="menu-panel"],
-toolbarpaletteitem[place="palette"] > #sidebar-button {
-  -moz-image-region: rect(0, 864px, 32px, 832px);
-}
-
-#panic-button[cui-areatype="menu-panel"],
-toolbarpaletteitem[place="palette"] > #panic-button {
-  -moz-image-region: rect(0, 896px, 32px, 864px);
-}
-
-#webide-button[cui-areatype="menu-panel"],
-toolbarpaletteitem[place="palette"] > #webide-button {
-  -moz-image-region: rect(0px, 960px, 32px, 928px);
-}
-
-toolbaritem[sdkstylewidget="true"] > toolbarbutton {
-  -moz-image-region: rect(0, 832px, 32px, 800px);
-}
-
-/* Wide panel control icons */
-
-#edit-controls@inAnyPanel@ > toolbarbutton,
-#zoom-controls@inAnyPanel@ > toolbarbutton,
-toolbarpaletteitem[place="palette"] > #edit-controls > toolbarbutton,
-toolbarpaletteitem[place="palette"] > #zoom-controls > toolbarbutton {
-  list-style-image: url(chrome://browser/skin/menuPanel-small.svg);
-}
-
-#edit-controls@inAnyPanel@ > #cut-button,
-toolbarpaletteitem[place="palette"] > #edit-controls > #cut-button {
-  -moz-image-region: rect(0px, 32px, 16px, 16px);
-}
-
-#edit-controls@inAnyPanel@ > #copy-button,
-toolbarpaletteitem[place="palette"] > #edit-controls > #copy-button {
-  -moz-image-region: rect(0px, 48px, 16px, 32px);
-}
-
-#edit-controls@inAnyPanel@ > #paste-button,
-toolbarpaletteitem[place="palette"] > #edit-controls > #paste-button {
-  -moz-image-region: rect(0px, 64px, 16px, 48px);
-}
-
-#zoom-controls@inAnyPanel@ > #zoom-out-button,
-toolbarpaletteitem[place="palette"] > #zoom-controls > #zoom-out-button {
-  -moz-image-region: rect(0px, 80px, 16px, 64px);
-}
-
-#zoom-controls@inAnyPanel@ > #zoom-in-button,
-toolbarpaletteitem[place="palette"] > #zoom-controls > #zoom-in-button {
-  -moz-image-region: rect(0px, 96px, 16px, 80px);
-}
-
diff --git a/browser/themes/shared/newtab/close.png b/browser/themes/shared/newtab/close.png
deleted file mode 100644
index ea6ada49e..000000000
--- a/browser/themes/shared/newtab/close.png
+++ /dev/null
diff --git a/browser/themes/shared/newtab/controls.svg b/browser/themes/shared/newtab/controls.svg
deleted file mode 100644
index 6eb00965d..000000000
--- a/browser/themes/shared/newtab/controls.svg
+++ /dev/null
@@ -1,85 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!-- This Source Code Form is subject to the terms of the Mozilla Public
-   - License, v. 2.0. If a copy of the MPL was not distributed with this
-   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
-<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width="288" height="32" viewBox="0 0 288 32">
-  <defs>
-    <style>
-      /* Glyph Styles */
-      .glyphShape-style {
-        fill: #737373;
-      }
-      .glyphShape-style-pin {
-        fill: #b4b4b4;
-      }
-      .glyphShape-style-hover-gear {
-        fill: #4a90e2;
-      }
-      .glyphShape-style-hover-pin {
-        fill: #4a90e2;
-      }
-      .glyphShape-style-hover-delete {
-        fill: #ea0000;
-      }
-      .glyphShape-style-hover-active {
-        fill: #231f20;
-      }
-      /* Circle Background Styles */
-      .glyphShape-style-circle {
-        fill: #fff;
-      }
-      .glyphShape-style-circle-dropshadow {
-        fill: #000;
-        fill-opacity: .5;
-        filter: url(#filter-shadow-drop);
-      }
-    </style>
-    <filter id="filter-shadow-drop" x="-10%" y="-10%" width="120%" height="120%">
-      <feOffset in="SourceAlpha" dx="0" dy=".75" result="filter-shadow-drop-offset" />
-      <feGaussianBlur in="filter-shadow-drop-offset" stdDeviation="1" result="filter-shadow-drop-blur"/>
-    </filter>
-    <path id="glyphShape-gear" d="M28,16c0-1.7,0.9-3.1,2-3.3c-0.4-1.5-0.9-2.9-1.7-4.2c-0.9,0.7-2.6,0.3-3.8-0.9c-1.2-1.2-1.6-2.8-0.9-3.8 c-1.3-0.8-2.7-1.4-4.2-1.7c-0.2,1.1-1.6,2-3.3,2S13,3.1,12.8,2c-1.5,0.4-2.9,0.9-4.2,1.7c0.7,0.9,0.3,2.6-0.9,3.8 c-1.4,1.1-3,1.5-4,0.9C2.9,9.7,2.4,11.2,2,12.7c1.1,0.2,2,1.6,2,3.3s-0.9,3.1-2,3.3c0.4,1.5,0.9,2.9,1.7,4.2 c0.9-0.7,2.6-0.3,3.8,0.9c1.2,1.2,1.6,2.8,0.9,3.8c1.3,0.8,2.7,1.4,4.2,1.7c0.2-1.1,1.6-2,3.3-2s3.1,0.9,3.3,2 c1.5-0.4,2.9-0.9,4.2-1.7c-0.7-0.9-0.3-2.6,0.9-3.8c1.3-1.2,2.8-1.6,3.8-0.9c0.8-1.3,1.4-2.7,1.7-4.2C28.9,19.1,28,17.7,28,16z M16,24c-4.4,0-8-3.6-8-8s3.6-8,8-8s8,3.6,8,8S20.4,24,16,24z"/>
-    <circle id="glyphShape-circle" cx="16" cy="16" r="14"/>
-    <path id="glyphShape-pin" d="M19,15v-5h2V7H11v3h2v5l-3,2v2h5c0,4.5,0.4,8,1,8s1-3.5,1-8h5v-2L19,15z"/>
-    <polygon id="glyphShape-delete" points="23,11 21,9 16,14 11,9 9,11 14,16 9,21 11,23 16,18 21,23 23,21 18,16"/>
-  </defs>
-  <g id="icon-gear-default">
-    <use xlink:href="#glyphShape-gear" class="glyphShape-style"/>
-  </g>
-  <g id="icon-gear-default" transform="translate(32)">
-    <use xlink:href="#glyphShape-gear" class="glyphShape-style-hover-gear"/>
-  </g>
-  <g id="icon-pin-default" transform="translate(64)">
-    <use xlink:href="#glyphShape-circle" class="glyphShape-style-circle-dropshadow"/>
-    <use xlink:href="#glyphShape-circle" class="glyphShape-style-circle"/>
-    <use xlink:href="#glyphShape-pin" class="glyphShape-style"/>
-  </g>
-  <g id="icon-pin-hover" transform="translate(96)">
-    <use xlink:href="#glyphShape-circle" class="glyphShape-style-circle-dropshadow"/>
-    <use xlink:href="#glyphShape-circle" class="glyphShape-style-circle"/>
-    <use xlink:href="#glyphShape-pin" class="glyphShape-style-hover-pin"/>
-  </g>
-  <g id="icon-pin-hover-active" transform="translate(128)">
-    <use xlink:href="#glyphShape-circle" class="glyphShape-style-circle-dropshadow"/>
-    <use xlink:href="#glyphShape-circle" class="glyphShape-style-circle"/>
-    <use xlink:href="#glyphShape-pin" class="glyphShape-style-hover-active"/>
-  </g>
-  <g id="icon-delete-default" transform="translate(160)">
-    <use xlink:href="#glyphShape-circle" class="glyphShape-style-circle-dropshadow"/>
-    <use xlink:href="#glyphShape-circle" class="glyphShape-style-circle"/>
-    <use xlink:href="#glyphShape-delete" class="glyphShape-style"/>
-  </g>
-  <g id="icon-delete-hover" transform="translate(192)">
-    <use xlink:href="#glyphShape-circle" class="glyphShape-style-circle-dropshadow"/>
-    <use xlink:href="#glyphShape-circle" class="glyphShape-style-circle"/>
-    <use xlink:href="#glyphShape-delete" class="glyphShape-style-hover-delete"/>
-  </g>
-  <g id="icon-delete-hover-active" transform="translate(224)">
-    <use xlink:href="#glyphShape-circle" class="glyphShape-style-circle-dropshadow"/>
-    <use xlink:href="#glyphShape-circle" class="glyphShape-style-circle"/>
-    <use xlink:href="#glyphShape-delete" class="glyphShape-style-hover-active"/>
-  </g>
-  <g id="icon-pin-default" transform="translate(256)">
-    <use xlink:href="#glyphShape-pin" class="glyphShape-style-pin"/>
-  </g>
-</svg>
diff --git a/browser/themes/shared/newtab/newTab.inc.css b/browser/themes/shared/newtab/newTab.inc.css
deleted file mode 100644
index 8ecd603c9..000000000
--- a/browser/themes/shared/newtab/newTab.inc.css
+++ /dev/null
@@ -1,344 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-:root {
-  -moz-appearance: none;
-  font-size: 75%;
-  background-color: transparent;
-}
-
-/* UNDO */
-#newtab-undo-container {
-  padding: 4px 3px;
-  border: 1px solid;
-  border-color: rgba(8,22,37,.12) rgba(8,22,37,.14) rgba(8,22,37,.16);
-  background-color: rgba(255,255,255,.4);
-  color: #525e69;
-}
-
-#newtab-undo-label {
-  margin-top: 0;
-  margin-bottom: 0;
-}
-
-.newtab-undo-button {
-  -moz-appearance: none;
-  cursor: pointer;
-  padding: 0;
-  margin: 0 4px;
-  border: 0;
-  background: transparent;
-  text-decoration: none;
-  min-width: 0;
-}
-
-.newtab-undo-button:hover {
-  text-decoration: underline;
-}
-
-.newtab-undo-button:-moz-focusring {
-  outline: 1px dotted;
-}
-
-#newtab-undo-close-button {
-  -moz-appearance: none;
-  padding: 0;
-  border: none;
-}
-
-#newtab-undo-close-button {
-  -moz-appearance: none;
-  padding: 0;
-  border: none;
-  height: 16px;
-  width: 16px;
-  float: right;
-  right: 0;
-  background-image: -moz-image-rect(url(chrome://browser/skin/newtab/close.png), 0, 16, 16, 0);
-  background-color: transparent;
-}
-
-#newtab-undo-close-button:hover {
-  background-image: -moz-image-rect(url(chrome://browser/skin/newtab/close.png), 0, 32, 16, 16);
-}
-
-#newtab-undo-close-button:hover:active {
-  background-image: -moz-image-rect(url(chrome://browser/skin/newtab/close.png), 0, 48, 16, 32);
-}
-
-/* CUSTOMIZE */
-#newtab-customize-button,
-.newtab-customize {
-  background-image: -moz-image-rect(url(chrome://browser/skin/newtab/controls.svg), 0, 32, 32, 0);
-  background-size: 28px;
-  height: 38px;
-  width: 38px;
-  background-repeat: no-repeat;
-  background-position: center;
-  background-color: transparent;
-  border: none;
-}
-
-.newtab-customize {
-  height: 28px;
-  width: 28px;
-}
-
-#newtab-customize-button {
-  font-size: 28px;
-  padding: 0;
-  /* only display the text label when CSS backgrounds are disabled (e.g. in high contrast mode) */
-  color: transparent;
-}
-
-#newtab-customize-button:-moz-any(:hover, :active, [active]) {
-  background-image: -moz-image-rect(url(chrome://browser/skin/newtab/controls.svg), 0, 64, 32, 32);
-  background-color: #FFFFFF;
-  border: solid 1px #CCCCCC;
-  border-radius: 2px;
-}
-
-/* GRID */
-#topsites-heading {
-  color: #7A7A7A;
-  font-size: 1em;
-  font-weight: normal;
-  /* Position the heading such that it doesn't affect how many cells we
-     can fit into the grid. */
-  position: absolute;
-  /* The top margin moves the heading away from the grid.
-     The horizontal margin aligns the heading with the cells. */
-  margin: -1em 10px 0;
-}
-
-/* CELLS */
-.newtab-cell {
-  --cell-corner-radius: 8px;
-  background-color: rgba(255,255,255,.2);
-  border-radius: var(--cell-corner-radius);
-}
-
-body.compact .newtab-cell {
-  --cell-corner-radius: 2px;
-}
-
-.newtab-cell:empty {
-  outline: 2px dashed #c1c1c1;
-  outline-offset: -2px;
-  -moz-outline-radius: var(--cell-corner-radius);
-}
-
-/* SITES */
-.newtab-site {
-  border-radius: var(--cell-corner-radius);
-  box-shadow: 0 1px 3px #c1c1c1;
-  text-decoration: none;
-  transition-property: top, left, opacity, box-shadow, background-color;
-}
-
-.newtab-cell:not([ignorehover]) .newtab-control:hover ~ .newtab-link,
-.newtab-cell:not([ignorehover]) .newtab-link:hover,
-.newtab-site[dragged] {
-  border: 2px solid white;
-  box-shadow: 0 0 6px 1px #add6ff;
-  margin: -2px;
-}
-
-.newtab-site[dragged] {
-  transition-property: box-shadow, background-color;
-  background-color: rgb(242,242,242);
-}
-
-/* LINKS */
-.newtab-link {
-  border-radius: var(--cell-corner-radius);
-  overflow: hidden;
-}
-
-/***
- * If you change the sizes here, change them in newTab.css
- * and the preference values:
- * toolkit.pageThumbs.minWidth
- * toolkit.pageThumbs.minHeight
- */
-/* THUMBNAILS */
-.newtab-thumbnail {
-  background-origin: padding-box;
-  background-clip: padding-box;
-  background-repeat: no-repeat;
-  background-size: cover;
-  height: 180px;
-  transition: opacity 100ms ease-out;
-}
-
-body.compact .newtab-thumbnail {
-  height: 100%;
-  border-radius: calc(var(--cell-corner-radius) + 1px);
-  outline: 1px solid hsla(0,0%,0%,.1);
-  -moz-outline-radius: var(--cell-corner-radius);
-  outline-offset: -1px;
-}
-
-.newtab-thumbnail.placeholder {
-  color: white;
-  font-size: 85px;
-  line-height: 200%;
-}
-
-body.compact .newtab-thumbnail.placeholder {
-  font-size: 45px;
-}
-
-.newtab-cell:not([ignorehover]) .newtab-site:hover .newtab-thumbnail.enhanced-content {
-  opacity: 0;
-}
-
-.newtab-site[type=affiliate] .newtab-thumbnail,
-.newtab-site[type=enhanced] .newtab-thumbnail,
-.newtab-site[type=organic] .newtab-thumbnail,
-.newtab-site[type=sponsored] .newtab-thumbnail {
-  background-position: center center;
-}
-
-body.compact .newtab-site[type=affiliate] .newtab-thumbnail {
-  background-position: center 30%;
-}
-
-.newtab-site[type=affiliate] .newtab-thumbnail,
-body:not(.compact) .newtab-site[type=enhanced] .newtab-thumbnail,
-body:not(.compact) .newtab-site[type=organic] .newtab-thumbnail,
-body:not(.compact) .newtab-site[type=sponsored] .newtab-thumbnail {
-  background-size: auto;
-}
-
-/* TITLES */
-
-.newtab-title {
-  background-color: #F2F2F2;
-  font-size: 13px;
-  line-height: 30px;
-  border: 1px solid #fff;
-  border-radius: 0 0 var(--cell-corner-radius) var(--cell-corner-radius);
-}
-
-body.compact .newtab-title {
-  background-color: hsla(0,0%,100%,.85);
-  font-size: 12px;
-  line-height: 21px;
-  border: 1px solid hsla(0,0%,80%,.8);
-  border-top-color: hsla(0,0%,0%,.1);
-  background-clip: padding-box;
-}
-
-.newtab-title,
-.newtab-suggested {
-  color: #5c5c5c;
-}
-
-body.compact .newtab-title,
-body.compact .newtab-suggested {
-  color: black;
-}
-
-.newtab-suggested[active] {
-  background-color: rgba(51, 51, 51, 0.95);
-  border: 0;
-  color: white;
-}
-
-body:not(.compact) .newtab-site:hover .newtab-title {
-  color: white;
-  background-color: #333;
-  border-color: #333;
-  border-top-color: white;
-}
-
-body.compact .newtab-site:hover .newtab-title {
-  color: white;
-  background-color: hsla(0,0%,20%,.85);
-  border-color: hsla(0,0%,0%,.8);
-  border-top-color: white;
-}
-
-.newtab-site[pinned] .newtab-title {
-  padding-inline-start: 24px;
-}
-
-.newtab-site[pinned] .newtab-title::before {
-  background-image: -moz-image-rect(url("chrome://browser/skin/newtab/controls.svg"), 7, 278, 28, 266);
-  background-size: 10px;
-  content: "";
-  height: 17px;
-  left: 0;
-  position: absolute;
-  width: 10px;
-  margin-left: 8px;
-  margin-top: 6px;
-}
-
-.newtab-site[pinned] .newtab-title:dir(rtl)::before {
-  left: auto;
-  right: 0;
-}
-
-/* CONTROLS */
-.newtab-control {
-  background-color: transparent;
-  background-size: 24px;
-  border: none;
-  height: 24px;
-  width: 24px;
-  top: 4px;
-}
-
-.newtab-control-pin:dir(ltr),
-.newtab-control-block:dir(rtl) {
-  left: 4px;
-}
-
-.newtab-control-block:dir(ltr),
-.newtab-control-pin:dir(rtl) {
-  right: 4px;
-}
-
-body.compact .newtab-control {
-  top: -8px;
-}
-
-body.compact .newtab-control-pin:dir(ltr),
-body.compact .newtab-control-block:dir(rtl) {
-  left: -8px;
-}
-
-body.compact .newtab-control-block:dir(ltr),
-body.compact .newtab-control-pin:dir(rtl) {
-  right: -8px;
-}
-
-.newtab-control-pin,
-.newtab-site[pinned] .newtab-control-pin:hover:active {
-  background-image: -moz-image-rect(url(chrome://browser/skin/newtab/controls.svg), 0, 96, 32, 64);
-}
-
-.newtab-control-pin:hover,
-.newtab-site[pinned] .newtab-control-pin:hover {
-  background-image: -moz-image-rect(url(chrome://browser/skin/newtab/controls.svg), 0, 160, 32, 128);
-}
-
-.newtab-control-pin:hover:active,
-.newtab-site[pinned] .newtab-control-pin {
-  background-image: -moz-image-rect(url(chrome://browser/skin/newtab/controls.svg), 0, 128, 32, 96);
-}
-
-.newtab-control-block {
-  background-image: -moz-image-rect(url(chrome://browser/skin/newtab/controls.svg), 0, 192, 32, 160);
-}
-
-.newtab-control-block:hover {
-  background-image: -moz-image-rect(url(chrome://browser/skin/newtab/controls.svg), 0, 224, 32, 192);
-}
-
-.newtab-control-block:hover:active {
-  background-image: -moz-image-rect(url(chrome://browser/skin/newtab/controls.svg), 0, 256, 32, 224);
-}
diff --git a/browser/themes/shared/newtab/whimsycorn.png b/browser/themes/shared/newtab/whimsycorn.png
deleted file mode 100644
index 5c5c2f498..000000000
--- a/browser/themes/shared/newtab/whimsycorn.png
+++ /dev/null
diff --git a/browser/themes/shared/notification-icons.inc.css b/browser/themes/shared/notification-icons.inc.css
deleted file mode 100644
index 86dce73a1..000000000
--- a/browser/themes/shared/notification-icons.inc.css
+++ /dev/null
@@ -1,296 +0,0 @@
-%if 0
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-%endif
-
-#notification-popup-box {
-  padding: 5px 0px;
-  margin: -5px 0px;
-  margin-inline-end: -5px;
-  padding-inline-end: 5px;
-}
-
-.notification-anchor-icon,
-#blocked-permissions-container > .blocked-permission-icon {
-  width: 16px;
-  height: 16px;
-  margin-inline-start: 2px;
-}
-
-/* This class can be used alone or in combination with the class defining the
-   type of icon displayed. This rule must be defined before the others in order
-   for its list-style-image to be overridden. */
-.notification-anchor-icon {
-  list-style-image: url(chrome://browser/skin/notification-icons.svg#default-info);
-}
-
-.popup-notification-icon {
-  width: 64px;
-  height: 64px;
-  margin-inline-end: 10px;
-}
-
-.notification-anchor-icon:not(.plugin-blocked):-moz-lwtheme,
-#blocked-permissions-container > .blocked-permission-icon:-moz-lwtheme {
-  filter: url(chrome://browser/skin/filters.svg#fill);
-  fill: currentColor;
-}
-
-.notification-anchor-icon:not(.plugin-blocked):not(:hover) {
-  opacity: .8;
-}
-
-/* INDIVIDUAL NOTIFICATIONS */
-
-.popup-notification-icon[popupid="web-notifications"],
-.desktop-notification-icon {
-  list-style-image: url(chrome://browser/skin/notification-icons.svg#desktop-notification);
-}
-
-.desktop-notification-icon.blocked-permission-icon {
-  list-style-image: url(chrome://browser/skin/notification-icons.svg#desktop-notification-blocked);
-}
-
-.geo-icon {
-%ifdef XP_MACOSX
-  list-style-image: url(chrome://browser/skin/notification-icons.svg#geo-osx);
-%elif defined(MOZ_WIDGET_GTK)
-  list-style-image: url(chrome://browser/skin/notification-icons.svg#geo-linux);
-%else
-  list-style-image: url(chrome://browser/skin/notification-icons.svg#geo-windows);
-%endif
-}
-
-.geo-icon.blocked-permission-icon {
-%ifdef XP_MACOSX
-  list-style-image: url(chrome://browser/skin/notification-icons.svg#geo-osx-blocked);
-%elif defined(MOZ_WIDGET_GTK)
-  list-style-image: url(chrome://browser/skin/notification-icons.svg#geo-linux-blocked);
-%else
-  list-style-image: url(chrome://browser/skin/notification-icons.svg#geo-windows-blocked);
-%endif
-}
-
-.popup-notification-icon[popupid="geolocation"] {
-%ifdef XP_MACOSX
-  list-style-image: url(chrome://browser/skin/notification-icons.svg#geo-osx);
-%elif defined(MOZ_WIDGET_GTK)
-  list-style-image: url(chrome://browser/skin/notification-icons.svg#geo-linux-detailed);
-%else
-  list-style-image: url(chrome://browser/skin/notification-icons.svg#geo-windows-detailed);
-%endif
-}
-
-.popup-notification-icon[popupid="indexedDB-permissions-prompt"],
-.indexedDB-icon {
-  list-style-image: url(chrome://browser/skin/notification-icons.svg#indexedDB);
-}
-
-.indexedDB-icon.blocked-permission-icon {
-  list-style-image: url(chrome://browser/skin/notification-icons.svg#indexedDB-blocked);
-}
-
-.login-icon {
-  list-style-image: url(chrome://browser/skin/notification-icons.svg#login);
-}
-
-.popup-notification-icon[popupid="password"] {
-  list-style-image: url(chrome://browser/skin/notification-icons.svg#login-detailed);
-}
-
-.camera-icon {
-  list-style-image: url(chrome://browser/skin/notification-icons.svg#camera);
-}
-
-.camera-icon.in-use {
-  list-style-image: url(chrome://browser/skin/notification-icons.svg#camera-sharing);
-}
-
-.camera-icon.blocked-permission-icon {
-  list-style-image: url(chrome://browser/skin/notification-icons.svg#camera-blocked);
-}
-
-.microphone-icon {
-  list-style-image: url(chrome://browser/skin/notification-icons.svg#microphone);
-}
-
-.microphone-icon.in-use {
-  list-style-image: url(chrome://browser/skin/notification-icons.svg#microphone-sharing);
-}
-
-.microphone-icon.blocked-permission-icon {
-  list-style-image: url(chrome://browser/skin/notification-icons.svg#microphone-blocked);
-}
-
-.popup-notification-icon.microphone-icon {
-  list-style-image: url(chrome://browser/skin/notification-icons.svg#microphone-detailed);
-}
-
-.screen-icon {
-  list-style-image: url(chrome://browser/skin/notification-icons.svg#screen);
-}
-
-.screen-icon.in-use {
-  list-style-image: url(chrome://browser/skin/notification-icons.svg#screen-sharing);
-}
-
-.screen-icon.blocked-permission-icon {
-  list-style-image: url(chrome://browser/skin/notification-icons.svg#screen-blocked);
-}
-
-#webRTC-preview:not([hidden]) {
-  display: -moz-stack;
-  border-radius: 4px;
-  border: 1px solid GrayText;
-  overflow: hidden;
-  min-width: 300px;
-  min-height: 10em;
-}
-
-html|*#webRTC-previewVideo {
-  width: 300px;
-  /* If we don't set the min-width, width is ignored. */
-  min-width: 300px;
-  max-height: 200px;
-}
-
-#webRTC-previewWarning {
-  background: rgba(255, 217, 99, .8) url("chrome://browser/skin/warning-white.svg") no-repeat .75em .75em;
-  margin: 0;
-  padding: .5em;
-  padding-inline-start: calc(1.5em + 16px);
-  border-top: 1px solid GrayText;
-}
-
-#webRTC-previewWarning > .text-link {
-  margin-inline-start: 0;
-}
-
-/* This icon has a block sign in it, so we don't need a blocked version. */
-.popup-icon {
-  list-style-image: url("chrome://browser/skin/notification-icons.svg#popup");
-}
-
-/* EME */
-
-.popup-notification-icon[popupid="drmContentPlaying"],
-.drm-icon {
-  list-style-image: url("chrome://browser/skin/drm-icon.svg#chains");
-}
-
-.drm-icon:hover:active {
-  list-style-image: url("chrome://browser/skin/drm-icon.svg#chains-pressed");
-}
-
-#eme-notification-icon[firstplay=true] {
-  animation: emeTeachingMoment 0.2s linear 0s 5 normal;
-}
-
-@keyframes emeTeachingMoment {
-  0% {transform: translateX(0); }
-  25% {transform: translateX(3px) }
-  75% {transform: translateX(-3px) }
-  100% { transform: translateX(0); }
-}
-
-/* INSTALL ADDONS */
-
-.install-icon {
-  list-style-image: url(chrome://browser/skin/addons/addon-install-anchor.svg);
-}
-
-.popup-notification-icon[popupid="xpinstall-disabled"],
-.popup-notification-icon[popupid="addon-install-blocked"],
-.popup-notification-icon[popupid="addon-install-origin-blocked"] {
-  list-style-image: url(chrome://browser/skin/addons/addon-install-blocked.svg);
-}
-
-.popup-notification-icon[popupid="addon-progress"] {
-  list-style-image: url(chrome://browser/skin/addons/addon-install-downloading.svg);
-}
-
-.popup-notification-icon[popupid="addon-install-failed"] {
-  list-style-image: url(chrome://browser/skin/addons/addon-install-error.svg);
-}
-
-.popup-notification-icon[popupid="addon-install-confirmation"] {
-  list-style-image: url(chrome://browser/skin/addons/addon-install-confirm.svg);
-}
-
-#addon-install-confirmation-notification[warning] .popup-notification-icon[popupid="addon-install-confirmation"] {
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-}
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-.popup-notification-icon[popupid="addon-install-complete"] {
-  list-style-image: url(chrome://browser/skin/addons/addon-install-installed.svg);
-}
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-.popup-notification-icon[popupid="addon-install-restart"] {
-  list-style-image: url(chrome://browser/skin/addons/addon-install-restart.svg);
-}
-
-.popup-notification-icon[popupid="click-to-play-plugins"] {
-  list-style-image: url(chrome://mozapps/skin/plugins/pluginBlocked-64.png);
-}
-
-/* OFFLINE APPS */
-
-.popup-notification-icon[popupid*="offline-app-requested"],
-.popup-notification-icon[popupid="offline-app-usage"] {
-  list-style-image: url(chrome://global/skin/icons/question-64.png);
-}
-
-/* PLUGINS */
-
-.plugin-icon {
-  list-style-image: url(chrome://browser/skin/notification-icons.svg#plugin);
-}
-
-.plugin-icon.plugin-blocked {
-  list-style-image: url(chrome://browser/skin/notification-icons.svg#plugin-blocked);
-}
-
-#notification-popup-box[hidden] {
-  /* Override display:none to make the pluginBlockedNotification animation work
-     when showing the notification repeatedly. */
-  display: -moz-box;
-  visibility: collapse;
-}
-
-#plugins-notification-icon.plugin-blocked[showing] {
-  animation: pluginBlockedNotification 500ms ease 0s 5 alternate both;
-}
-
-@keyframes pluginBlockedNotification {
-  from {
-    opacity: 0;
-  }
-  to {
-    opacity: 1;
-  }
-}
-
-/* TRANSLATION */
-
-.translation-icon {
-  list-style-image: url(chrome://browser/skin/translation-16.png);
-  -moz-image-region: rect(0px, 16px, 16px, 0px);
-}
-
-.translation-icon.in-use {
-  -moz-image-region: rect(0px, 32px, 16px, 16px);
-}
-
-%ifdef XP_MACOSX
-@media (min-resolution: 1.1dppx) {
-  .translation-icon {
-    list-style-image: url(chrome://browser/skin/translation-16@2x.png);
-    -moz-image-region: rect(0px, 32px, 32px, 0px);
-  }
-
-  .translation-icon.in-use {
-    -moz-image-region: rect(0px, 64px, 32px, 32px);
-  }
-}
-%endif
diff --git a/browser/themes/shared/notification-icons.svg b/browser/themes/shared/notification-icons.svg
deleted file mode 100644
index 206157cf2..000000000
--- a/browser/themes/shared/notification-icons.svg
+++ /dev/null
@@ -1,104 +0,0 @@
-<?xml version="1.0"?>
-<!-- This Source Code Form is subject to the terms of the Mozilla Public
-   - License, v. 2.0. If a copy of the MPL was not distributed with this
-   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
-<svg xmlns="http://www.w3.org/2000/svg"
-     xmlns:xlink="http://www.w3.org/1999/xlink"
-     class="fieldtext"
-     width="32" height="32" viewBox="0 0 32 32">
-#include icon-colors.inc.svg
-  <style>
-    :root > use:not(:target),
-    :root > g:not(:target),
-    #strikeout {
-      display: none;
-    }
-    .blocked:target ~ #strikeout {
-      display: block;
-    }
-    .blocked {
-      clip-path: url(#blocked-clipPath);
-    }
-
-    #login-highlighted {
-      fill: HighlightText;
-      fill-opacity: 1;
-    }
-
-    #plugin-blocked,
-    #plugin-blocked:target ~ #strikeout {
-      fill: #d92215;
-      fill-opacity: 1;
-    }
-
-    #camera-sharing,
-    #microphone-sharing,
-    #screen-sharing {
-      fill: rgb(224, 41, 29);
-      fill-opacity: 1;
-    }
-  </style>
-
-  <defs>
-    <path id="camera-icon" d="m 2,23 a 3,3 0 0 0 3,3 l 14,0 a 3,3 0 0 0 3,-3 l 0,-4 6,5.5 c 0.5,0.5 1,0.7 2,0.5 l 0,-18 c -1,-0.2 -1.5,0 -2,0.5 l -6,5.5 0,-4 a 3,3 0 0 0 -3,-3 l -14,0 a 3,3 0 0 0 -3,3 z" />
-    <path id="desktop-notification-icon" d="m 2,20 a 4,4 0 0 0 4,4 l 13,0 7,7 0,-7 a 4,4 0 0 0 4,-4 l 0,-12 a 4,4 0 0 0 -4,-4 l -20,0 a 4,4 0 0 0 -4,4 z m 5,-2 a 1,1 0 1 1 0,-2 l 10,0 a 1,1 0 1 1 0,2 z m 0,-4 a 1,1 0 1 1 0,-2 l 14,0 a 1,1 0 1 1 0,2 z m 0,-4 a 1,1 0 1 1 0,-2 l 18,0 a 1,1 0 1 1 0,2 z" />
-    <path id="geo-linux-icon" d="m 2,15.9 a 14,14 0 1 1 0,0.2 z m 4,2.1 a 10,10 0 0 0 8,8 l 0,-4 4,0 0,4 a 10,10 0 0 0 8,-8 l -4,0 0,-4 4,0 a 10,10 0 0 0 -8,-8 l 0,4 -4,0 0,-4 a 10,10 0 0 0 -8,8 l 4,0 0,4 z" />
-    <path id="geo-linux-detailed-icon" d="m 2,15.9 a 14,14 0 1 1 0,0.2 z m 3,2.1 a 11,11 0 0 0 9,9 l 1,-5 2,0 1,5 a 11,11 0 0 0 9,-9 l -5,-1 0,-2 5,-1 a 11,11 0 0 0 -9,-9 l -1,5 -2,0 -1,-5 a 11,11 0 0 0 -9,9 l 5,1 0,2 z" />
-    <path id="geo-osx-icon" d="m 0,16 16,0 0,16 12,-28 z" />
-    <path id="geo-windows-icon" d="m 2,14 0,4 2,0 a 12,12 0 0 0 10,10 l 0,2 4,0 0,-2 a 12,12 0 0 0 10,-10 l 2,0 0,-4 -2,0 a 12,12 0 0 0 -10,-10 l 0,-2 -4,0 0,2 a 12,12 0 0 0 -10,10 z m 4,1.9 a 10,10 0 1 1 0,0.2 z m 4,0 a 6,6 0 1 1 0,0.2 z" />
-    <path id="geo-windows-detailed-icon" d="m 2,14.5 0,3 2,0.5 a 12,12 0 0 0 10,10 l 0.5,2 3,0 0.5,-2 a 12,12 0 0 0 10,-10 l 2,-0.5 0,-3 -2,-0.5 a 12,12 0 0 0 -10,-10 l -0.5,-2 -3,0 -0.5,2 a 12,12 0 0 0 -10,10 z m 4,1.4 a 10,10 0 1 1 0,0.2 z m 3,0 a 7,7 0 1 1 0,0.2 z" />
-    <path id="indexedDB-icon" d="m 2,24 a 4,4 0 0 0 4,4 l 2,0 0,-4 -2,0 0,-16 20,0 0,16 -2,0 0,4 2,0 a 4,4 0 0 0 4,-4 l 0,-16 a 4,4 0 0 0 -4,-4 l -20,0 a 4,4 0 0 0 -4,4 z m 8,-2 6,7 6,-7 -4,0 0,-8 -4,0 0,8 z" />
-    <path id="login-icon" d="m 2,26 0,4 6,0 0,-2 2,0 0,-2 1,0 0,-1 2,0 0,-3 2,0 2.5,-2.5 1.5,1.5 3,-3 a 8,8 0 1 0 -8,-8 l -3,3 2,2 z m 20,-18.1 a 2,2 0 1 1 0,0.2 z" />
-    <path id="login-detailed-icon" d="m 1,27 0,3.5 a 0.5,0.5 0 0 0 0.5,0.5 l 5,0 a 0.5,0.5 0 0 0 0.5,-0.5 l 0,-1.5 1.5,0 a 0.5,0.5 0 0 0 0.5,-0.5 l 0,-1.5 1,0 a 0.5,0.5 0 0 0 0.5,-0.5 l 0,-1 1,0 a 0.5,0.5 0 0 0 0.5,-0.5 l 0,-2 2,0 2.5,-2.5 q 0.5,-0.5 1,0 l 1,1 c 0.5,0.5 1,0.5 1.5,-0.5 l 1,-2 a 9,9 0 1 0 -8,-8 l -2,1 c -1,0.5 -1,1 -0.5,1.5 l 1.5,1.5 q 0.5,0.5 0,1 z m 21,-19.1 a 2,2 0 1 1 0,0.2 z" />
-    <path id="microphone-icon" d="m 8,14 0,4 a 8,8 0 0 0 6,7.7 l 0,2.3 -2,0 a 2,2 0 0 0 -2,2 l 12,0 a 2,2 0 0 0 -2,-2 l -2,0 0,-2.3 a 8,8 0 0 0 6,-7.7 l 0,-4 -2,0 0,4 a 6,6 0 0 1 -12,0 l 0,-4 z m 4,4 a 4,4 0 0 0 8,0 l 0,-12 a 4,4 0 0 0 -8,0 z" />
-    <path id="microphone-detailed-icon" d="m 8,18 a 8,8 0 0 0 6,7.7 l 0,2.3 -1,0 a 3,2 0 0 0 -3,2 l 12,0 a 3,2 0 0 0 -3,-2 l -1,0 0,-2.3 a 8,8 0 0 0 6,-7.7 l 0,-4 a 1,1 0 0 0 -2,0 l 0,4 a 6,6 0 0 1 -12,0 l 0,-4 a 1,1 0 0 0 -2,0 z m 4,0 a 4,4 0 0 0 8,0 l 0,-12 a 4,4 0 0 0 -8,0 z" />
-    <path id="plugin-icon" d="m 2,26 a 2,2 0 0 0 2,2 l 24,0 a 2,2 0 0 0 2,-2 l 0,-16 a 2,2 0 0 0 -2,-2 l -24,0 a 2,2 0 0 0 -2,2 z m 2,-20 10,0 0,-2 a 2,2 0 0 0 -2,-2 l -6,0 a 2,2 0 0 0 -2,2 z m 14,0 10,0 0,-2 a 2,2 0 0 0 -2,-2 l -6,0 a 2,2 0 0 0 -2,2 z" />
-    <path id="popup-icon" d="m 2,24 a 4,4 0 0 0 4,4 l 8,0 a 10,10 0 0 1 -2,-4 l -4,0 a 2,2 0 0 1 -2,-2 l 0,-12 18,0 0,2 a 10,10 0 0 1 4,2 l 0,-8 a 4,4 0 0 0 -4,-4 l -18,0 a 4,4 0 0 0 -4,4 z m 12,-2.1 a 8,8 0 1 1 0,0.2 m 10.7,-4.3 a 5,5 0 0 0 -6.9,6.9 z m -5.4,8.4 a 5,5 0 0 0 6.9,-6.9 z" />
-    <path id="screen-icon" d="m 2,18 a 2,2 0 0 0 2,2 l 2,0 0,-6 a 4,4 0 0 1 4,-4 l 14,0 0,-6 a 2,2 0 0 0 -2,-2 l -18,0 a 2,2 0 0 0 -2,2 z m 6,10 a 2,2 0 0 0 2,2 l 18,0 a 2,2 0 0 0 2,-2 l 0,-14 a 2,2 0 0 0 -2,-2 l -18,0 a 2,2 0 0 0 -2,2 z" />
-
-    <clipPath id="blocked-clipPath">
-      <path d="m 0,0 0,31 31,-31 z m 6,32 26,0 0,-26 z"/>
-    </clipPath>
-
-    <mask id="i-mask" style="fill-opacity: 1;">
-      <rect fill="white" width="32" height="32"/>
-      <circle fill="black" cx="16" cy="9" r="2.5"/>
-      <rect fill="black" x="14" y="14" width="4" height="10" rx="2" ry="2"/>
-    </mask>
-  </defs>
-
-  <g id="default-info">
-    <circle cx="16" cy="16" r="14" mask="url(#i-mask)"/>
-  </g>
-
-  <use id="camera" xlink:href="#camera-icon" />
-  <use id="camera-sharing" xlink:href="#camera-icon"/>
-  <use id="camera-blocked" class="blocked" xlink:href="#camera-icon" />
-  <use id="desktop-notification" xlink:href="#desktop-notification-icon" />
-  <use id="desktop-notification-blocked" class="blocked" xlink:href="#desktop-notification-icon" />
-  <use id="geo-osx" xlink:href="#geo-osx-icon" />
-  <use id="geo-osx-blocked" class="blocked" xlink:href="#geo-osx-icon" />
-  <use id="geo-linux" xlink:href="#geo-linux-icon" />
-  <use id="geo-linux-blocked" class="blocked" xlink:href="#geo-linux-icon" />
-  <use id="geo-linux-detailed" xlink:href="#geo-linux-detailed-icon" />
-  <use id="geo-windows" xlink:href="#geo-windows-icon" />
-  <use id="geo-windows-blocked" class="blocked" xlink:href="#geo-windows-icon" />
-  <use id="geo-windows-detailed" xlink:href="#geo-windows-detailed-icon" />
-  <use id="indexedDB" xlink:href="#indexedDB-icon" />
-  <use id="indexedDB-blocked" class="blocked" xlink:href="#indexedDB-icon" />
-  <use id="login" xlink:href="#login-icon" />
-  <use id="login-highlighted" class="highlighted" xlink:href="#login-icon" />
-  <use id="login-detailed" xlink:href="#login-detailed-icon" />
-  <use id="microphone" xlink:href="#microphone-icon" />
-  <use id="microphone-sharing" xlink:href="#microphone-icon"/>
-  <use id="microphone-blocked" class="blocked" xlink:href="#microphone-icon" />
-  <use id="microphone-detailed" xlink:href="#microphone-detailed-icon" />
-  <use id="plugin" xlink:href="#plugin-icon" />
-  <use id="plugin-blocked" class="blocked" xlink:href="#plugin-icon" />
-  <use id="popup" xlink:href="#popup-icon" />
-  <use id="screen" xlink:href="#screen-icon" />
-  <use id="screen-sharing" xlink:href="#screen-icon"/>
-  <use id="screen-blocked" class="blocked" xlink:href="#screen-icon" />
-
-  <path id="strikeout" d="m 2,28 2,2 26,-26 -2,-2 z"/>
-</svg>
diff --git a/browser/themes/shared/panel-icons.svg b/browser/themes/shared/panel-icons.svg
deleted file mode 100644
index 2092e0f64..000000000
--- a/browser/themes/shared/panel-icons.svg
+++ /dev/null
@@ -1,18 +0,0 @@
-<?xml version="1.0"?>
-<!-- This Source Code Form is subject to the terms of the Mozilla Public
-   - License, v. 2.0. If a copy of the MPL was not distributed with this
-   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
-<svg xmlns="http://www.w3.org/2000/svg"
-     width="32" height="32" viewBox="0 0 32 32">
-  <style>
-    path:not(:target) {
-      display: none;
-    }
-  </style>
-  <path id="cancel" d="m 6,9.5 6.5,6.5 -6.5,6.5 3.5,3.5 6.5,-6.5 6.5,6.5 3.5,-3.5 -6.5,-6.5 6.5,-6.5 -3.5,-3.5 -6.5,6.5 -6.5,-6.5 z" />
-  <path id="folder" d="M17.3,9.4c0,0,1.1,0,3.7,0c1.7,0,2,0,5.6,0c0.6,0,0.6,0,1.1,0V9.2c0-1.5-0.9-2.6-2-2.6h-5.8V6.3c0-0.6-1.5-2-2.8-2h-7.1 H7.6H4.9v2.4v2.4v2.2c2.8,0,8.5,0,8.5,0C16.4,11.3,17.3,9.4,17.3,9.4z M29,13c0-0.6-0.6-1.1-1.5-1.7l0,0c-0.2,0-0.6,0-0.9,0 c-2.8,0-3,0-4.8,0c-1.9,0-3.3,0-3.3,0s-1.5,2.4-3.7,2.4c0,0-6.5,0-9.1,0H5.4C3,13.7,3,15.9,3,15.9l1.1,9.7C4.1,27.1,5,28,6.5,28 h19.1c1.5,0,2.4-0.9,2.4-2.4L29,13.7l0,0l0,0C29,13.7,29,13,29,13z" />
-  <path id="magnifier" d="M12.9,2c6,0,11,5,11,11c0,2.2-0.6,4.2-1.8,6l7.2,7c0.8,0.8,0.8,2.4,0,3.2c-0.6,0.6-1.2,0.8-1.6,0.8s-1.2-0.2-1.6-0.6l-7-7 c-1.8,1.2-3.8,1.8-6,1.8c-6,0-11-5-11-11C2.1,7.2,6.9,2,12.9,2z M12.9,20c3.8,0,7-3.2,7-7s-3.2-7-7-7s-7,3.2-7,7S9.1,20,12.9,20z" />
-  <path id="retry" d="M28,16.5v-14l-5,4.8c-1.8-1.4-4.4-2.4-7-2.4c-6.4,0-11.8,5.2-11.8,11.8c0,6.4,5.2,11.8,11.8,11.8c3.4,0,6.2-1.4,8.2-3.6 l-3.4-3.4c-1.2,1.2-3,1.8-5,1.8c-3.6,0.2-6.8-2.8-6.8-6.8c0-3.8,3-7.2,7-7.2c1.4,0,2.6,0.4,3.6,1l-6,6.2H28z"/>
-  <path id="arrow-left" d="M23.5,25l-9-9l9-9l-3-3l-12,12l12,12L23.5,25z" />
-  <path id="arrow-right" d="M11.6,28l12-12l-12-12l-3,3l9,9l-9,9L11.6,28z" />
-</svg>
diff --git a/browser/themes/shared/panic-panel/header-small.png b/browser/themes/shared/panic-panel/header-small.png
deleted file mode 100644
index ef1956fb8..000000000
--- a/browser/themes/shared/panic-panel/header-small.png
+++ /dev/null
diff --git a/browser/themes/shared/panic-panel/header-small@2x.png b/browser/themes/shared/panic-panel/header-small@2x.png
deleted file mode 100644
index ae445a4a9..000000000
--- a/browser/themes/shared/panic-panel/header-small@2x.png
+++ /dev/null
diff --git a/browser/themes/shared/panic-panel/header.png b/browser/themes/shared/panic-panel/header.png
deleted file mode 100644
index edac3e6d6..000000000
--- a/browser/themes/shared/panic-panel/header.png
+++ /dev/null
diff --git a/browser/themes/shared/panic-panel/header@2x.png b/browser/themes/shared/panic-panel/header@2x.png
deleted file mode 100644
index f137928e5..000000000
--- a/browser/themes/shared/panic-panel/header@2x.png
+++ /dev/null
diff --git a/browser/themes/shared/panic-panel/icons.png b/browser/themes/shared/panic-panel/icons.png
deleted file mode 100644
index f7f9a3e08..000000000
--- a/browser/themes/shared/panic-panel/icons.png
+++ /dev/null
diff --git a/browser/themes/shared/panic-panel/icons@2x.png b/browser/themes/shared/panic-panel/icons@2x.png
deleted file mode 100644
index 959ebf586..000000000
--- a/browser/themes/shared/panic-panel/icons@2x.png
+++ /dev/null
diff --git a/browser/themes/shared/plugin-doorhanger.inc.css b/browser/themes/shared/plugin-doorhanger.inc.css
deleted file mode 100644
index dd315bb8b..000000000
--- a/browser/themes/shared/plugin-doorhanger.inc.css
+++ /dev/null
@@ -1,65 +0,0 @@
-#notification-popup[popupid="click-to-play-plugins"] > .panel-arrowcontainer > .panel-arrowcontent {
-  padding: 0px;
-}
-
-.click-to-play-plugins-notification-center-box {
-  border: 1px solid ThreeDShadow;
-  margin: 10px;
-}
-
-.plugin-popupnotification-centeritem:nth-child(odd) {
-  background-color: rgba(0,0,0,0.1);
-}
-
-.center-item-label {
-  margin-inline-start: 6px;
-  margin-bottom: 0;
-  text-overflow: ellipsis;
-}
-
-.center-item-warning-icon {
-  background-image: url("chrome://mozapps/skin/extensions/alerticon-info-negative.svg");
-  background-repeat: no-repeat;
-  width: 16px;
-  height: 15px;
-  margin-inline-start: 6px;
-}
-
-.click-to-play-plugins-notification-button-container {
-  background-color: var(--arrowpanel-dimmed);
-  border-top: 1px solid var(--panel-separator-color);
-  padding: 10px;
-  margin-top: 5px;
-}
-
-.click-to-play-popup-button {
-  width: 50%;
-}
-
-.click-to-play-plugins-notification-description-box {
-  padding: 10px;
-}
-
-.click-to-play-plugins-outer-description {
-  margin-top: 8px;
-}
-
-.click-to-play-plugins-notification-link,
-.center-item-link {
-  margin: 0;
-}
-
-.messageImage[value="plugin-hidden"] {
-  list-style-image: url(chrome://browser/skin/notification-icons.svg#plugin);
-}
-
-/* Keep any changes to this style in sync with pluginProblem.css */
-notification.pluginVulnerable {
-  background-color: rgb(72,72,72);
-  background-image: url(chrome://mozapps/skin/plugins/contentPluginStripe.png);
-  color: white;
-}
-
-notification.pluginVulnerable .messageImage {
-  list-style-image: url(chrome://browser/skin/notification-icons.svg#plugin-blocked);
-}
diff --git a/browser/themes/shared/preferences/containers.css b/browser/themes/shared/preferences/containers.css
deleted file mode 100644
index 3fb965331..000000000
--- a/browser/themes/shared/preferences/containers.css
+++ /dev/null
@@ -1,53 +0,0 @@
-/* Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-%include ../../../components/contextualidentity/content/usercontext.css
-
-:root {
-  --preference-selected-color: #0996f8;
-  --preference-unselected-color: #333;
-  --preference-active-color: #858585;
-}
-
-radiogroup {
-  display: flex;
-  margin-inline-start: 0.35rem;
-}
-
-radio {
-  flex: auto;
-  display: flex;
-  align-items: center;
-  justify-content: center;
-  -moz-user-select: none;
-  outline: 2px solid transparent;
-  outline-offset: 4px;
-  -moz-outline-radius: 100%;
-  min-block-size: 24px;
-  min-inline-size: 24px;
-  border-radius: 50%;
-  padding: 2px;
-  margin: 10px;
-}
-
-.icon-buttons > radio > [data-identity-icon] {
-  fill: #4d4d4d;
-}
-
-radio > [data-identity-icon] {
-  inline-size: 22px;
-  block-size: 22px;
-}
-
-radio[selected=true] {
-  outline-color: var(--preference-unselected-color);
-}
-
-radio[focused=true] {
-  outline-color: var(--preference-selected-color);
-}
-
-radio:hover:active {
-  outline-color: var(--preference-active-color);
-}
diff --git a/browser/themes/shared/privatebrowsing/aboutPrivateBrowsing.css b/browser/themes/shared/privatebrowsing/aboutPrivateBrowsing.css
deleted file mode 100644
index 923aa929b..000000000
--- a/browser/themes/shared/privatebrowsing/aboutPrivateBrowsing.css
+++ /dev/null
@@ -1,227 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-@import url("chrome://global/skin/in-content/info-pages.css");
-
-:root {
-  --color-grey-lightest: #fbfbfb;
-  --color-grey: #b1b1b1;
-
-  --color-blue: #0996f8;
-  --color-blue-dark: #0670cc;
-  --color-blue-darker: #005bab;
-
-  --icon-margin: 64px;
-}
-
-html.private {
-  --in-content-page-color: #beb8cc;
-  --in-content-text-color: #beb8cc;
-  --in-content-page-background: #1c023c;
-}
-
-body {
-  padding: 40px;
-}
-
-a:link {
-  color: var(--color-blue);
-  text-decoration: none;
-}
-
-a:hover {
-  color: var(--color-blue-dark);
-  text-decoration: underline;
-}
-
-a:hover:active {
-  color: var(--color-blue-darker);
-}
-
-a:visited {
-  color: var(--color-blue-darker);
-}
-
-.about-content-container {
-  max-width: 780px;
-}
-
-.section-main {
-  margin-bottom: 48px;
-  margin-inline-start: var(--icon-margin);
-  padding-inline-start: 24px;
-}
-
-.section-main:last-child {
-  margin-bottom: 0;
-}
-
-p {
-  line-height: 1.5em;
-}
-
-.list-row {
-  overflow: auto;
-}
-
-.list-row > ul > li {
-  float: left;
-  width: 220px;
-  line-height: 1.5em;
-  margin-inline-start: 1em;
-  margin-bottom: 0;
-}
-
-.list-row > ul > li:dir(rtl) {
-  float: right;
-}
-
-.title {
-  background-image: url("chrome://browser/skin/privatebrowsing/private-browsing.svg");
-  background-size: 64px;
-  background-position: left, center;
-  font-weight: lighter;
-  line-height: 1.5em;
-  min-height: 64px;
-  margin-inline-start: 0;
-  padding-inline-start: calc(var(--icon-margin) + 24px);
-}
-
-.title:dir(rtl) {
-  background-position: right, center;
-}
-
-.about-subheader {
-  display: flex;
-  align-items: center;
-  font-size: 1.5em;
-  font-weight: lighter;
-  min-height: 32px;
-  background-image: url("chrome://browser/skin/privatebrowsing/tracking-protection.svg");
-  background-repeat: no-repeat;
-  background-size: 32px;
-  margin-inline-start: calc(var(--icon-margin) - 32px);
-  padding-inline-start: 56px;
-}
-
-.about-subheader:dir(rtl) {
-  background-position: right;
-}
-
-.about-subheader.tp-off {
-  background-image: url("chrome://browser/skin/privatebrowsing/tracking-protection-off.svg");
-}
-
-.about-info {
-  font-size: .875em;
-}
-
-.tpTitle {
-  margin-inline-end: 12px;
-}
-
-.private strong {
-  color: var(--color-grey-lightest);
-  font-weight: normal;
-}
-
-a.button {
-  padding: 5px 40px;
-  background-color: #381e59;
-  border: 1px solid #43256a;
-  border-radius: 4px;
-  text-decoration: none;
-  display: inline-block;
-}
-
-/**
- * We want to hide the checkbox in lieu of the toggle-btn
- * "slider toggle". We need to make the toggle keyboard
- * focusable, however, which is not possible if it's
- * display:none. We work around this by making the toggle
- * invisible but still present in the display list, allowing
- * it to receive keyboard events. When it is focused by keyboard,
- * we use the -moz-focusring selector on the invisible checkbox
- * to show a focus ring around the slider toggle.
- */
-.toggle-input {
-  opacity: 0;
-  width: 0;
-  pointer-events: none;
-  position: absolute;
-}
-
-.toggle + .toggle-btn {
-  box-sizing: border-box;
-  cursor: pointer;
-  min-width: 60px;
-  height: 24px;
-  border-radius: 12px;
-  background-color: var(--color-grey);
-  border: 1px var(--color-grey) solid;
-  padding: 2px;
-}
-
-.toggle + .toggle-btn::after,
-.toggle + .toggle-btn::before {
-  position: relative;
-  display: block;
-  content: "";
-  width: 19px;
-  height: 100%;
-}
-
-.toggle + .toggle-btn::after {
-  left: 0;
-  box-shadow: 0 0 1px 1px hsla(0, 0%, 0%, .1),
-              0 1px 0 hsla(0, 0%, 0%, .2);
-  border-radius: 50%;
-  background: white;
-  transition: left .2s ease;
-}
-
-.toggle + .toggle-btn::before {
-  float: left;
-  left: 9px;
-  visibility: hidden;
-  background-size: 16px;
-  background-repeat: no-repeat;
-  background-color: transparent;
-  background-image: url("chrome://browser/skin/privatebrowsing/check.svg");
-}
-
-.toggle + .toggle-btn:dir(rtl)::after {
-  left: auto;
-  right: 0;
-  transition-property: right;
-}
-
-.toggle + .toggle-btn:dir(rtl)::before {
-  float: right;
-  left: auto;
-  right: 9px;
-}
-
-.toggle:checked + .toggle-btn {
-  background: #3fc455;
-  border: 1px solid #269939;
-}
-
-.toggle:checked + .toggle-btn::after {
-  left: 35px;
-}
-
-.toggle:checked + .toggle-btn:dir(rtl)::after {
-  right: 35px;
-}
-
-.toggle:checked + .toggle-btn::before {
-  visibility: visible;
-}
-
-.toggle:-moz-focusring + .toggle-btn {
-  outline: 2px solid rgba(0, 149, 221, 0.5);
-  outline-offset: 1px;
-  -moz-outline-radius: 2px;
-}
diff --git a/browser/themes/shared/privatebrowsing/attention.png b/browser/themes/shared/privatebrowsing/attention.png
deleted file mode 100755
index 8706928ff..000000000
--- a/browser/themes/shared/privatebrowsing/attention.png
+++ /dev/null
diff --git a/browser/themes/shared/privatebrowsing/attention@2x.png b/browser/themes/shared/privatebrowsing/attention@2x.png
deleted file mode 100755
index 5b32888c8..000000000
--- a/browser/themes/shared/privatebrowsing/attention@2x.png
+++ /dev/null
diff --git a/browser/themes/shared/privatebrowsing/check.png b/browser/themes/shared/privatebrowsing/check.png
deleted file mode 100755
index 59ca51b7b..000000000
--- a/browser/themes/shared/privatebrowsing/check.png
+++ /dev/null
diff --git a/browser/themes/shared/privatebrowsing/check.svg b/browser/themes/shared/privatebrowsing/check.svg
deleted file mode 100644
index a8e4bcc2b..000000000
--- a/browser/themes/shared/privatebrowsing/check.svg
+++ /dev/null
@@ -1,8 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!-- This Source Code Form is subject to the terms of the Mozilla Public
-   - License, v. 2.0. If a copy of the MPL was not distributed with this
-   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
-
-<svg xmlns="http://www.w3.org/2000/svg" width="32" height="32" viewBox="0 0 32 32">
-  <path fill="#fff" d="M30.057,9.752L15.9,23.909h0l-4.044,4.045-4.045-4.045h0l-6.068-6.067,4.045-4.045,6.068,6.067L26.012,5.707Z"/>
-</svg>
diff --git a/browser/themes/shared/privatebrowsing/check@2x.png b/browser/themes/shared/privatebrowsing/check@2x.png
deleted file mode 100755
index 031685cbf..000000000
--- a/browser/themes/shared/privatebrowsing/check@2x.png
+++ /dev/null
diff --git a/browser/themes/shared/privatebrowsing/favicon.svg b/browser/themes/shared/privatebrowsing/favicon.svg
deleted file mode 100644
index 6de9c6450..000000000
--- a/browser/themes/shared/privatebrowsing/favicon.svg
+++ /dev/null
@@ -1,11 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!-- This Source Code Form is subject to the terms of the Mozilla Public
-   - License, v. 2.0. If a copy of the MPL was not distributed with this
-   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
-
-<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 16 16">
-  <circle cx="8" cy="8" r="8" fill="#8d20ae" />
-  <circle cx="8" cy="8" r="7.5" stroke="#7b149a" stroke-width="1" fill="none" />
-  <path d="M11.309,10.995C10.061,10.995,9.2,9.5,8,9.5s-2.135,1.5-3.309,1.5c-1.541,0-2.678-1.455-2.7-3.948C1.983,5.5,2.446,5.005,4.446,5.005S7.031,5.822,8,5.822s1.555-.817,3.555-0.817S14.017,5.5,14.006,7.047C13.987,9.54,12.85,10.995,11.309,10.995ZM5.426,6.911a1.739,1.739,0,0,0-1.716.953A2.049,2.049,0,0,0,5.3,8.544c0.788,0,1.716-.288,1.716-0.544A1.428,1.428,0,0,0,5.426,6.911Zm5.148,0A1.429,1.429,0,0,0,8.981,8c0,0.257.928,0.544,1.716,0.544a2.049,2.049,0,0,0,1.593-.681A1.739,1.739,0,0,0,10.574,6.911Z" stroke="#670c83" stroke-width="2" fill="none" />
-  <path d="M11.309,10.995C10.061,10.995,9.2,9.5,8,9.5s-2.135,1.5-3.309,1.5c-1.541,0-2.678-1.455-2.7-3.948C1.983,5.5,2.446,5.005,4.446,5.005S7.031,5.822,8,5.822s1.555-.817,3.555-0.817S14.017,5.5,14.006,7.047C13.987,9.54,12.85,10.995,11.309,10.995ZM5.426,6.911a1.739,1.739,0,0,0-1.716.953A2.049,2.049,0,0,0,5.3,8.544c0.788,0,1.716-.288,1.716-0.544A1.428,1.428,0,0,0,5.426,6.911Zm5.148,0A1.429,1.429,0,0,0,8.981,8c0,0.257.928,0.544,1.716,0.544a2.049,2.049,0,0,0,1.593-.681A1.739,1.739,0,0,0,10.574,6.911Z" fill="#fff" />
-</svg>
diff --git a/browser/themes/shared/privatebrowsing/private-browsing.svg b/browser/themes/shared/privatebrowsing/private-browsing.svg
deleted file mode 100644
index cc37bc4f3..000000000
--- a/browser/themes/shared/privatebrowsing/private-browsing.svg
+++ /dev/null
@@ -1,12 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!-- This Source Code Form is subject to the terms of the Mozilla Public
-   - License, v. 2.0. If a copy of the MPL was not distributed with this
-   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
-
-<svg xmlns="http://www.w3.org/2000/svg" width="64" height="64" viewBox="0 0 64 64">
-  <ellipse cx="32" cy="34" rx="29.5" ry="30" fill="#000" fill-opacity=".1" />
-  <circle cx="32" cy="32" r="30" fill="#8d20ae" />
-  <circle cx="32" cy="32" r="29.5" stroke="#7b149a" stroke-width="1" fill="none" />
-  <path d="M45.225,43c-4.989,0-8.44-5.5-13.224-5.5S23.468,43,18.776,43C12.62,43,8.074,37.656,8,28.5,7.954,22.815,9.805,21,17.8,21S28.128,24,32,24s6.214-3,14.2-3,9.842,1.815,9.8,7.5C55.926,37.656,51.381,43,45.225,43ZM21.714,28c-4.857.193-6.857,2.846-6.857,3.5s3.22,2.5,6.367,2.5,6.857-1.057,6.857-2C28.082,30.948,26.3,27.818,21.714,28Zm20.572,0c-4.583-.182-6.367,2.948-6.367,4,0,0.943,3.709,2,6.857,2s6.367-1.846,6.367-2.5S47.143,28.193,42.286,28Z" stroke="#670c83" stroke-width="2" fill="none" />
-  <path d="M45.225,43c-4.989,0-8.44-5.5-13.224-5.5S23.468,43,18.776,43C12.62,43,8.074,37.656,8,28.5,7.954,22.815,9.805,21,17.8,21S28.128,24,32,24s6.214-3,14.2-3,9.842,1.815,9.8,7.5C55.926,37.656,51.381,43,45.225,43ZM21.714,28c-4.857.193-6.857,2.846-6.857,3.5s3.22,2.5,6.367,2.5,6.857-1.057,6.857-2C28.082,30.948,26.3,27.818,21.714,28Zm20.572,0c-4.583-.182-6.367,2.948-6.367,4,0,0.943,3.709,2,6.857,2s6.367-1.846,6.367-2.5S47.143,28.193,42.286,28Z" fill="#fff" />
-</svg>
diff --git a/browser/themes/shared/privatebrowsing/shield-page.png b/browser/themes/shared/privatebrowsing/shield-page.png
deleted file mode 100755
index 2ddcf34e9..000000000
--- a/browser/themes/shared/privatebrowsing/shield-page.png
+++ /dev/null
diff --git a/browser/themes/shared/privatebrowsing/shield-page@2x.png b/browser/themes/shared/privatebrowsing/shield-page@2x.png
deleted file mode 100755
index 72a0b8273..000000000
--- a/browser/themes/shared/privatebrowsing/shield-page@2x.png
+++ /dev/null
diff --git a/browser/themes/shared/privatebrowsing/tracking-protection-off.svg b/browser/themes/shared/privatebrowsing/tracking-protection-off.svg
deleted file mode 100644
index 7da0ca78a..000000000
--- a/browser/themes/shared/privatebrowsing/tracking-protection-off.svg
+++ /dev/null
@@ -1,15 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!-- This Source Code Form is subject to the terms of the Mozilla Public
-   - License, v. 2.0. If a copy of the MPL was not distributed with this
-   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
-
-<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 32 32">
-  <g fill="#ccc">
-    <path d="M28.8,0.3l-2.4,2.4L16.1,1.1L4.9,2.9c-1,0.2-1.8,1-1.8,2c0,2.5,0,6.9,0.3,8.7c0.4,4.3,1.2,6.9,2.7,9.4l-3.5,3.5l2,2
-      L30.8,2.3L28.8,0.3z M5.3,13.5c-0.2-1.9-0.2-6.2-0.2-8.6c0,0,0,0,0.1,0l10.9-1.8l8.6,1.4L16.1,13V5L7.2,6.6c-0.1,0-0.1,0-0.1,0
-      c0,2,0,5.6,0.2,7.1c0.3,3,0.8,4.9,1.6,6.5l-1.4,1.4C6.3,19.6,5.6,17.3,5.3,13.5z"/>
-    <path d="M16.1,20.3l-3.9,3.9c1.7,1.2,3.4,1.6,3.9,1.7V20.3z"/>
-    <path d="M26.9,13.4c-0.5,5.6-1.7,8-3.8,10.7c-2.4,3.1-6.1,3.9-7,4.1c-0.7-0.2-3.2-0.7-5.4-2.5L9.3,27c3.1,2.7,6.7,3,6.7,3
-      s5.2-0.5,8.6-4.9c2.5-3.2,3.6-5.9,4.2-11.6c0.1-1.3,0.2-4,0.2-6.3l-2,2C27,10.9,27,12.5,26.9,13.4z"/>
-  </g>
-</svg>
diff --git a/browser/themes/shared/privatebrowsing/tracking-protection.svg b/browser/themes/shared/privatebrowsing/tracking-protection.svg
deleted file mode 100644
index d22fe7df3..000000000
--- a/browser/themes/shared/privatebrowsing/tracking-protection.svg
+++ /dev/null
@@ -1,12 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!-- This Source Code Form is subject to the terms of the Mozilla Public
-   - License, v. 2.0. If a copy of the MPL was not distributed with this
-   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
-
-<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 32 32">
-  <path fill="#ccc" d="M27.2,2.8L16,1L4.8,2.8C3.8,3,3,3.8,3,4.8c0,2.5,0,6.9,0.3,8.7C3.8,19,5,21.8,7.5,25.1C10.8,29.5,16,30,16,30
-    s5.2-0.5,8.6-4.9c2.5-3.2,3.6-5.9,4.2-11.6C29,11.7,29,7.2,29,4.8C29,3.8,28.2,3,27.2,2.8z M26.8,13.3L26.8,13.3L26.8,13.3
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-</svg>
diff --git a/browser/themes/shared/reader/reader-mode-16.png b/browser/themes/shared/reader/reader-mode-16.png
deleted file mode 100644
index 12e2fd991..000000000
--- a/browser/themes/shared/reader/reader-mode-16.png
+++ /dev/null
diff --git a/browser/themes/shared/reader/reader-mode-16@2x.png b/browser/themes/shared/reader/reader-mode-16@2x.png
deleted file mode 100644
index 236f52d8f..000000000
--- a/browser/themes/shared/reader/reader-mode-16@2x.png
+++ /dev/null
diff --git a/browser/themes/shared/reader/reader-tour.png b/browser/themes/shared/reader/reader-tour.png
deleted file mode 100644
index be346b384..000000000
--- a/browser/themes/shared/reader/reader-tour.png
+++ /dev/null
diff --git a/browser/themes/shared/reader/reader-tour@2x.png b/browser/themes/shared/reader/reader-tour@2x.png
deleted file mode 100644
index 1a60d93ca..000000000
--- a/browser/themes/shared/reader/reader-tour@2x.png
+++ /dev/null
diff --git a/browser/themes/shared/reader/readerMode.svg b/browser/themes/shared/reader/readerMode.svg
deleted file mode 100644
index 9293d1df2..000000000
--- a/browser/themes/shared/reader/readerMode.svg
+++ /dev/null
@@ -1,29 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>

-<!-- This Source Code Form is subject to the terms of the Mozilla Public

-   - License, v. 2.0. If a copy of the MPL was not distributed with this

-   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->

-<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width="48" height="16" viewBox="0 0 48 16">

-  <defs>

-    <path id="glyphShape-readerMode-book" d="M5.5,5h-2C3.2,5,3,5.2,3,5.5S3.2,6,3.5,6h2 C5.8,6,6,5.8,6,5.5S5.8,5,5.5,5z M5.5,7h-2C3.2,7,3,7.2,3,7.5S3.2,8,3.5,8h2C5.8,8,6,7.8,6,7.5S5.8,7,5.5,7z M5.5,9h-2 C3.2,9,3,9.2,3,9.5S3.2,10,3.5,10h2C5.8,10,6,9.8,6,9.5S5.8,9,5.5,9z M15.4,2c0,0-3.1,0-4.4,0S8.1,2.5,8,4.3C7.9,2.5,6.3,2,5,2 S0.6,2,0.6,2C0.3,2,0,2.3,0,2.7v9.6C0,12.6,0.3,13,0.6,13c0,0,2.6,0,4.4,0c1.6,0,2.8,1,3,2.3C8.2,14,9.4,13,11,13 c1.8,0,4.4,0,4.4,0c0.4,0,0.6-0.4,0.6-0.8V2.7C16,2.3,15.7,2,15.4,2z M14,11L14,11c-0.2,0-1.6,0-3,0c-1.6,0-2.9,0.8-3,2.2 C7.9,11.8,6.6,11,5,11c-1.4,0-2.8,0-3,0l0,0l0,0V4c0,0,2.7,0,3.5,0C6.6,4,8,5.5,8,6.8C8,5.5,9.4,4,10.5,4C11.3,4,14,4,14,4V11 L14,11z"/>

-    <linearGradient id="gradient-state-default" x1="0%" y1="0%" x2="0" y2="100%">

-      <stop stop-color="#989898" offset="0%"/>

-      <stop stop-color="#808080" offset="100%"/>

-    </linearGradient>

-    <linearGradient id="gradient-state-hover" x1="0%" y1="0%" x2="0" y2="100%">

-      <stop stop-color="#24aef4" offset="0%"/>

-      <stop stop-color="#177bdb" offset="100%"/>

-    </linearGradient>

-    <linearGradient id="gradient-state-pressed" x1="0%" y1="0%" x2="0" y2="100%">

-      <stop stop-color="#ff9300" offset="0%"/>

-      <stop stop-color="#ff5500" offset="100%"/>

-    </linearGradient>

-    <style>

-      .icon-state-default { fill: url(#gradient-state-default); }

-      .icon-state-hover   { fill: url(#gradient-state-hover); }

-      .icon-state-pressed { fill: url(#gradient-state-pressed); }

-    </style>

-  </defs>

-  <use xlink:href="#glyphShape-readerMode-book" class="icon-state-default"/>

-  <use xlink:href="#glyphShape-readerMode-book" class="icon-state-hover" transform="translate(16)"/>

-  <use xlink:href="#glyphShape-readerMode-book" class="icon-state-pressed" transform="translate(32)"/>

-</svg>

diff --git a/browser/themes/shared/search/badge-add-engine.png b/browser/themes/shared/search/badge-add-engine.png
deleted file mode 100644
index 226b7bf2b..000000000
--- a/browser/themes/shared/search/badge-add-engine.png
+++ /dev/null
diff --git a/browser/themes/shared/search/badge-add-engine@2x.png b/browser/themes/shared/search/badge-add-engine@2x.png
deleted file mode 100644
index abf084aad..000000000
--- a/browser/themes/shared/search/badge-add-engine@2x.png
+++ /dev/null
diff --git a/browser/themes/shared/search/gear.svg b/browser/themes/shared/search/gear.svg
deleted file mode 100755
index b765f3dfe..000000000
--- a/browser/themes/shared/search/gear.svg
+++ /dev/null
@@ -1,7 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!-- This Source Code Form is subject to the terms of the Mozilla Public
-   - License, v. 2.0. If a copy of the MPL was not distributed with this
-   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
-<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 32 32">
-  <path id="glyphShape-gear" d="M28,16c0-1.7,0.9-3.1,2-3.3c-0.4-1.5-0.9-2.9-1.7-4.2c-0.9,0.7-2.6,0.3-3.8-0.9c-1.2-1.2-1.6-2.8-0.9-3.8 c-1.3-0.8-2.7-1.4-4.2-1.7c-0.2,1.1-1.6,2-3.3,2S13,3.1,12.8,2c-1.5,0.4-2.9,0.9-4.2,1.7c0.7,0.9,0.3,2.6-0.9,3.8 c-1.4,1.1-3,1.5-4,0.9C2.9,9.7,2.4,11.2,2,12.7c1.1,0.2,2,1.6,2,3.3s-0.9,3.1-2,3.3c0.4,1.5,0.9,2.9,1.7,4.2 c0.9-0.7,2.6-0.3,3.8,0.9c1.2,1.2,1.6,2.8,0.9,3.8c1.3,0.8,2.7,1.4,4.2,1.7c0.2-1.1,1.6-2,3.3-2s3.1,0.9,3.3,2 c1.5-0.4,2.9-0.9,4.2-1.7c-0.7-0.9-0.3-2.6,0.9-3.8c1.3-1.2,2.8-1.6,3.8-0.9c0.8-1.3,1.4-2.7,1.7-4.2C28.9,19.1,28,17.7,28,16z M16,24c-4.4,0-8-3.6-8-8s3.6-8,8-8s8,3.6,8,8S20.4,24,16,24z"/>
-</svg>
diff --git a/browser/themes/shared/search/history-icon.svg b/browser/themes/shared/search/history-icon.svg
deleted file mode 100644
index 213694a8b..000000000
--- a/browser/themes/shared/search/history-icon.svg
+++ /dev/null
@@ -1,22 +0,0 @@
-<?xml version="1.0"?>
-<!-- This Source Code Form is subject to the terms of the Mozilla Public
-   - License, v. 2.0. If a copy of the MPL was not distributed with this
-   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
-<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width="16" height="16" viewBox="0 0 16 16">
-  <style>
-    use:not(:target) {
-      display: none;
-    }
-    use {
-      fill: graytext;
-    }
-    use[id$="-active"] {
-      fill: HighlightText;
-    }
-  </style>
-  <defs>
-    <path id="search-history-glyph" d="M8,1C4.1,1,1,4.1,1,8c0,3.9,3.1,7,7,7c3.9,0,7-3.1,7-7 C15,4.1,11.9,1,8,1z M8,13.3c-2.9,0-5.3-2.4-5.3-5.3S5.1,2.7,8,2.7c2.9,0,5.3,2.4,5.3,5.3S10.9,13.3,8,13.3z M10.5,7H9V5 c0-0.6-0.4-1-1-1S7,4.4,7,5v3c0,0.6,0.4,1,1,1h2.5c0.6,0,1-0.4,1-1C11.5,7.4,11.1,7,10.5,7z"/>
-  </defs>
-  <use id="search-history-icon" xlink:href="#search-history-glyph"/>
-  <use id="search-history-icon-active" xlink:href="#search-history-glyph"/>
-</svg>
diff --git a/browser/themes/shared/search/search-arrow-go.svg b/browser/themes/shared/search/search-arrow-go.svg
deleted file mode 100644
index 66d4bc913..000000000
--- a/browser/themes/shared/search/search-arrow-go.svg
+++ /dev/null
@@ -1,24 +0,0 @@
-<?xml version="1.0"?>
-<!-- This Source Code Form is subject to the terms of the Mozilla Public
-   - License, v. 2.0. If a copy of the MPL was not distributed with this
-   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
-<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width="16" height="16" viewBox="0 0 16 16">
-  <style>
-    use:not(:target) {
-      display: none;
-    }
-    use {
-      fill: #616366;
-    }
-    use[id$="-inverted"] {
-      fill: #fff;
-    }
-  </style>
-  <defs>
-    <path id="search-arrow-go-glyph" d="M1,7v2.2C1,9.8,1.4,10,2,10h7.5l-3,3.1c-0.4,0.3-0.4,1,0,1.4l0.8,0.8 c0.4,0.4,1,0.4,1.4,0l6.6-6.6c0.4-0.4,0.4-1,0-1.4L8.7,0.7c-0.4-0.4-1-0.4-1.4,0L6.5,1.6C6.1,2,6.1,2.6,6.5,3l3,3H2C1.4,6,1,6.4,1,7z"/>
-  </defs>
-  <use id="search-arrow-go" xlink:href="#search-arrow-go-glyph"/>
-  <use id="search-arrow-go-rtl" transform="rotate(180 8 8)" xlink:href="#search-arrow-go-glyph"/>
-  <use id="search-arrow-go-inverted" xlink:href="#search-arrow-go-glyph"/>
-  <use id="search-arrow-go-rtl-inverted" transform="rotate(180 8 8)" xlink:href="#search-arrow-go-glyph"/>
-</svg>
diff --git a/browser/themes/shared/search/search-engine-placeholder.png b/browser/themes/shared/search/search-engine-placeholder.png
deleted file mode 100644
index bff355bf4..000000000
--- a/browser/themes/shared/search/search-engine-placeholder.png
+++ /dev/null
diff --git a/browser/themes/shared/search/search-engine-placeholder@2x.png b/browser/themes/shared/search/search-engine-placeholder@2x.png
deleted file mode 100644
index 1565fc55d..000000000
--- a/browser/themes/shared/search/search-engine-placeholder@2x.png
+++ /dev/null
diff --git a/browser/themes/shared/search/search-indicator-badge-add.png b/browser/themes/shared/search/search-indicator-badge-add.png
deleted file mode 100644
index 62bf01b3d..000000000
--- a/browser/themes/shared/search/search-indicator-badge-add.png
+++ /dev/null
diff --git a/browser/themes/shared/search/search-indicator-badge-add@2x.png b/browser/themes/shared/search/search-indicator-badge-add@2x.png
deleted file mode 100644
index 81056248f..000000000
--- a/browser/themes/shared/search/search-indicator-badge-add@2x.png
+++ /dev/null
diff --git a/browser/themes/shared/search/search-indicator-magnifying-glass.svg b/browser/themes/shared/search/search-indicator-magnifying-glass.svg
deleted file mode 100644
index 15bddfba4..000000000
--- a/browser/themes/shared/search/search-indicator-magnifying-glass.svg
+++ /dev/null
@@ -1,7 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<!-- This Source Code Form is subject to the terms of the Mozilla Public
-   - License, v. 2.0. If a copy of the MPL was not distributed with this
-   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
-<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24">
-  <path fill="#808080" d="M21.7,20.3l-1.4,1.4l-5.4-5.4c-1.3,1-3,1.7-4.9,1.7 c-4.4,0-8-3.6-8-8c0-4.4,3.6-8,8-8c4.4,0,8,3.6,8,8c0,1.8-0.6,3.5-1.7,4.9L21.7,20.3z M10,4c-3.3,0-6,2.7-6,6s2.7,6,6,6s6-2.7,6-6 S13.3,4,10,4z"/>
-</svg>
diff --git a/browser/themes/shared/search/search-indicator.png b/browser/themes/shared/search/search-indicator.png
deleted file mode 100644
index a4eab0d7a..000000000
--- a/browser/themes/shared/search/search-indicator.png
+++ /dev/null
diff --git a/browser/themes/shared/search/search-indicator@2x.png b/browser/themes/shared/search/search-indicator@2x.png
deleted file mode 100644
index 2722c1697..000000000
--- a/browser/themes/shared/search/search-indicator@2x.png
+++ /dev/null
diff --git a/browser/themes/shared/searchReset.css b/browser/themes/shared/searchReset.css
deleted file mode 100644
index 3573d7d15..000000000
--- a/browser/themes/shared/searchReset.css
+++ /dev/null
@@ -1,22 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-body {
-  align-items: center;
-}
-
-.title {
-  background-image: url("chrome://browser/skin/icon-search-64.svg");
-}
-
-#defaultEngine {
-  padding-inline-start: 26px;
-  background-repeat: no-repeat;
-  background-position: 5px center;
-  background-size: 16px, 16px;
-}
-
-#defaultEngine:-moz-dir(rtl) {
-  background-position: calc(100% - 5px) center;
-}
diff --git a/browser/themes/shared/sync-desktopIcon.svg b/browser/themes/shared/sync-desktopIcon.svg
deleted file mode 100644
index d3279a984..000000000
--- a/browser/themes/shared/sync-desktopIcon.svg
+++ /dev/null
@@ -1,22 +0,0 @@
-<!-- This Source Code Form is subject to the terms of the Mozilla Public
-   - License, v. 2.0. If a copy of the MPL was not distributed with this
-   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
-<svg width="16" height="16" viewBox="0 0 16 16" xmlns="http://www.w3.org/2000/svg">
-  <style>
-    g:not(:target) { display: none; }
-
-    .glyph { fill: #4d4d4d; }
-    .glyph.translucent { fill-opacity: .15; }
-
-    .inverted .glyph { fill: #fff; }
-    .inverted .glyph.translucent { fill-opacity: .15; }
-  </style>
-  <g id="icon">
-    <path class="glyph" d="M15,14H1a1,1,0,0,1-1-1V12.526H16V13A1,1,0,0,1,15,14ZM1,4A1,1,0,0,1,2,3H14a1,1,0,0,1,1,1v8H1V4Zm1,7H14V4H2v7Z"/>
-    <rect class="glyph translucent" x="2" y="4" width="12" height="7"/>
-  </g>
-  <g id="icon-inverted" class="inverted">
-    <path class="glyph" d="M15,14H1a1,1,0,0,1-1-1V12.526H16V13A1,1,0,0,1,15,14ZM1,4A1,1,0,0,1,2,3H14a1,1,0,0,1,1,1v8H1V4Zm1,7H14V4H2v7Z"/>
-    <rect class="glyph translucent" x="2" y="4" width="12" height="7"/>
-  </g>
-</svg>
diff --git a/browser/themes/shared/sync-mobileIcon.svg b/browser/themes/shared/sync-mobileIcon.svg
deleted file mode 100644
index df19994f8..000000000
--- a/browser/themes/shared/sync-mobileIcon.svg
+++ /dev/null
@@ -1,22 +0,0 @@
-<!-- This Source Code Form is subject to the terms of the Mozilla Public
-   - License, v. 2.0. If a copy of the MPL was not distributed with this
-   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
-<svg width="16" height="16" viewBox="0 0 16 16" xmlns="http://www.w3.org/2000/svg">
-  <style>
-    g:not(:target) { display: none; }
-
-    .glyph { fill: #4d4d4d; }
-    .glyph.translucent { fill-opacity: .15; }
-
-    .inverted .glyph { fill: #fff; }
-    .inverted .glyph.translucent { fill-opacity: .15; }
-  </style>
-  <g id="icon">
-    <path class="glyph" d="M12,16H4a1,1,0,0,1-1-1V1A1,1,0,0,1,4,0h8a1,1,0,0,1,1,1V15A1,1,0,0,1,12,16Zm-4-.684a0.785,0.785,0,1,0-.785-0.785A0.785,0.785,0,0,0,8,15.316ZM12,2H4V13h8V2Z"/>
-    <rect class="glyph translucent" x="4" y="2" width="8" height="11"/>
-  </g>
-  <g id="icon-inverted" class="inverted">
-    <path class="glyph" d="M12,16H4a1,1,0,0,1-1-1V1A1,1,0,0,1,4,0h8a1,1,0,0,1,1,1V15A1,1,0,0,1,12,16Zm-4-.684a0.785,0.785,0,1,0-.785-0.785A0.785,0.785,0,0,0,8,15.316ZM12,2H4V13h8V2Z"/>
-    <rect class="glyph translucent" x="4" y="2" width="8" height="11"/>
-  </g>
-</svg>
diff --git a/browser/themes/shared/syncedtabs/sidebar.inc.css b/browser/themes/shared/syncedtabs/sidebar.inc.css
deleted file mode 100644
index 4e76a7fc5..000000000
--- a/browser/themes/shared/syncedtabs/sidebar.inc.css
+++ /dev/null
@@ -1,234 +0,0 @@
-% This Source Code Form is subject to the terms of the Mozilla Public
-% License, v. 2.0. If a copy of the MPL was not distributed with this
-% file, You can obtain one at http://mozilla.org/MPL/2.0/.
-
-/* These styles are intended to mimic XUL trees and the XUL search box. */
-
-html {
-  height: 100%;
-}
-
-body {
-  height: 100%;
-  margin: 0;
-  font: message-box;
-  color: #333333;
-  -moz-user-select: none;
-}
-
-/* The content-container holds the non-scrollable header and the scrollable
-   content area.
-*/
-.content-container {
-  display: flex;
-  flex-flow: column;
-  height: 100%;
-}
-
-/* The content header is not scrollable */
-.content-header {
-  flex: 0 1 auto;
-}
-
-/* The main content area is scrollable and fills the rest of the area */
-.content-scrollable {
-  flex: 1 1 auto;
-  overflow: auto;
-}
-
-.emptyListInfo {
-  cursor: default;
-  padding: 3em 1em;
-  text-align: center;
-}
-
-.list,
-.item-tabs-list {
-  display: flex;
-  flex-flow: column;
-  flex-grow: 1;
-}
-
-.item.client {
-  opacity: 1;
-  max-height: unset;
-  display: unset;
-}
-
-.item.client.closed .item-tabs-list {
-  display: none;
-}
-
-.item {
-  display: inline-block;
-  opacity: 1;
-  flex: 1;
-  min-width: 0;
-  white-space: nowrap;
-  overflow: hidden;
-  outline: none;
-  color: -moz-FieldText;
-}
-
-.item.selected > .item-title-container {
-  background-color: -moz-cellhighlight;
-  color: -moz-cellhighlighttext;
-  font-weight: bold;
-}
-
-.item.selected:focus > .item-title-container {
-  background-color: Highlight;
-  color: HighlightText;
-}
-
-.client .item.tab > .item-title-container {
-  padding-inline-start: 35px;
-}
-
-.item.tab > .item-title-container {
-  padding-inline-start: 20px;
-}
-
-.item.client.device-image-desktop > .item-title-container > .item-icon-container {
-  background-image: url("chrome://browser/skin/sync-desktopIcon.svg#icon");
-}
-
-.item.client.device-image-desktop.selected:focus > .item-title-container > .item-icon-container {
-  background-image: url("chrome://browser/skin/sync-desktopIcon.svg#icon-inverted");
-}
-
-.item.client.device-image-mobile > .item-title-container > .item-icon-container {
-  background-image: url("chrome://browser/skin/sync-mobileIcon.svg#icon");
-}
-
-.item.client.device-image-mobile.selected:focus > .item-title-container > .item-icon-container {
-  background-image: url("chrome://browser/skin/sync-mobileIcon.svg#icon-inverted");
-}
-
-.item.tab > .item-title-container > .item-icon-container {
-  background-image: url("chrome://mozapps/skin/places/defaultFavicon.png");
-}
-
-@media (min-resolution: 1.1dppx) {
-.item.tab > .item-title-container > .item-icon-container {
-    background-image: url("chrome://mozapps/skin/places/defaultFavicon@2x.png");
-  }
-}
-
-.item-icon-container {
-  min-width: 16px;
-  max-width: 16px;
-  min-height: 16px;
-  max-height: 16px;
-  margin-right: 5px;
-  margin-left: 5px;
-  background-size: 16px 16px;
-  background-size: contain;
-  background-repeat: no-repeat;
-  background-position: center;
-}
-
-.item-title-container {
-  display: flex;
-  flex-flow: row;
-  overflow: hidden;
-  flex-grow: 1;
-  padding: 1px 0px 1px 0px;
-}
-
-.item-title {
-  flex-grow: 1;
-  overflow: hidden;
-  text-overflow: ellipsis;
-  margin: 0px;
-  line-height: 1.3;
-  cursor: default;
-}
-
-.item[hidden] {
-  opacity: 0;
-  max-height: 0;
-  transition: opacity 150ms ease-in-out, max-height 150ms ease-in-out 150ms;
-}
-
-.item.empty .item-title-container {
-  color: #aeaeae;
-}
-
-.client .item.empty > .item-title-container {
-  padding-inline-start: 35px;
-}
-
-.text-input-box {
-  display: flex;
-  flex-flow: row nowrap;
-}
-
-.textbox-input-box {
-  display: flex;
-  flex-direction: row;
-}
-
-.tabsFilter {
-  flex: 1;
-  /* min-width of anything to override the implicit "-moz-min-content" value.
-     0px is safe as the sidebar itself has a constrained size meaning we will
-     never actually hit this minimum
-  */
-  min-width: 0px;
-}
-
-.sync-state > p {
-  padding-inline-end: 10px;
-  padding-inline-start: 10px;
-  color: #888;
-}
-
-.text-link {
-  color: rgb(0, 149, 221);
-  cursor: pointer;
-}
-
-.text-link:hover {
-  text-decoration: underline;
-}
-
-.text-link,
-.text-link:focus {
-  margin: 0px;
-  padding: 0px;
-  border: 0px;
-}
-
-.deck .sync-state {
-  display: none;
-  opacity: 0;
-  transition: opacity 1.5s;
-  border-top: 1px solid #bdbdbd;
-}
-
-.deck .sync-state.tabs-container {
-  border-top: 0px;
-}
-
-.deck .sync-state.selected {
-  display: unset;
-  opacity: 100;
-}
-
-.sidebar-search-container.tabs-container:not(.selected) {
-  display: none;
-}
-
-.textbox-search-clear:not([disabled]) {
-  cursor: default;
-}
-
-.textbox-search-icons .textbox-search-clear,
-.filtered .textbox-search-icons .textbox-search-icon {
-  display: none;
-}
-
-.filtered .textbox-search-icons .textbox-search-clear {
-  display: block;
-}
diff --git a/browser/themes/shared/tab-selected.svg b/browser/themes/shared/tab-selected.svg
deleted file mode 100644
index ca66d8116..000000000
--- a/browser/themes/shared/tab-selected.svg
+++ /dev/null
@@ -1,36 +0,0 @@
-<!-- This Source Code Form is subject to the terms of the Mozilla Public
-   - License, v. 2.0. If a copy of the MPL was not distributed with this
-   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
-<svg xmlns="http://www.w3.org/2000/svg" xmlns:svg="http://www.w3.org/2000/svg" width="30px" height="31px" preserveAspectRatio="none">
-  <defs>
-    <style>
-%filter substitution
-%ifdef XP_MACOSX
-%include ../osx/shared.inc
-%elif defined(MOZ_WIDGET_GTK)
-%include ../linux/linuxShared.inc
-%else
-%include ../windows/windowsShared.inc
-%endif
-      #tab-background-fill {
-        background-color: @fgTabBackgroundColor@;
-        background-image: @fgTabTexture@;
-        background-repeat: no-repeat;
-        height: 100%;
-        width: 100%;
-      }
-%ifdef XP_WIN
-      @media (-moz-windows-default-theme) and (-moz-os-version: windows-vista),
-             (-moz-windows-default-theme) and (-moz-os-version: windows-win7) {
-        #tab-background-fill {
-          background-color: @customToolbarColor@;
-        }
-      }
-%endif
-    </style>
-%include ../../base/content/tab-shape.inc.svg
-  </defs>
-  <foreignObject width="30" height="31" clip-path="url(#tab-curve-clip-path-@TAB_SIDE@)">
-    <div id="tab-background-fill" xmlns="http://www.w3.org/1999/xhtml"></div>
-  </foreignObject>
-</svg>
diff --git a/browser/themes/shared/tabbrowser/connecting.png b/browser/themes/shared/tabbrowser/connecting.png
deleted file mode 100644
index e564fb570..000000000
--- a/browser/themes/shared/tabbrowser/connecting.png
+++ /dev/null
diff --git a/browser/themes/shared/tabbrowser/connecting@2x.png b/browser/themes/shared/tabbrowser/connecting@2x.png
deleted file mode 100644
index 97e2b2eb6..000000000
--- a/browser/themes/shared/tabbrowser/connecting@2x.png
+++ /dev/null
diff --git a/browser/themes/shared/tabbrowser/crashed.svg b/browser/themes/shared/tabbrowser/crashed.svg
deleted file mode 100644
index 85f3d8514..000000000
--- a/browser/themes/shared/tabbrowser/crashed.svg
+++ /dev/null
@@ -1,14 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>

-<!-- This Source Code Form is subject to the terms of the Mozilla Public

-   - License, v. 2.0. If a copy of the MPL was not distributed with this

-   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->

-<svg xmlns="http://www.w3.org/2000/svg" viewBox="22 22 16 16">

-  <defs>

-    <linearGradient id="gradient" gradientUnits="userSpaceOnUse" x1="30" y1="23" x2="30" y2="37">

-      <stop offset="0" style="stop-color: #e63b2e"/>

-      <stop offset="1" style="stop-color: #c33931"/>

-    </linearGradient>

-  </defs>

-  <circle fill="url(#gradient)" cx="30" cy="30" r="7"/>

-  <path fill="#fff" d="M31.03,33.304c0,0.6-0.479,1.092-1.091,1.092c-0.6,0-1.079-0.492-1.079-1.092 c0-0.588,0.479-1.079,1.079-1.079C30.551,32.225,31.03,32.716,31.03,33.304z M29.171,31.133l-0.24-5.253h2.015l-0.24,5.253H29.171z"/>

-</svg>

diff --git a/browser/themes/shared/tabbrowser/pendingpaint.png b/browser/themes/shared/tabbrowser/pendingpaint.png
deleted file mode 100644
index 7bbf0fe4b..000000000
--- a/browser/themes/shared/tabbrowser/pendingpaint.png
+++ /dev/null
diff --git a/browser/themes/shared/tabbrowser/tab-audio-small.svg b/browser/themes/shared/tabbrowser/tab-audio-small.svg
deleted file mode 100644
index abfe71268..000000000
--- a/browser/themes/shared/tabbrowser/tab-audio-small.svg
+++ /dev/null
@@ -1,58 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!-- This Source Code Form is subject to the terms of the Mozilla Public
-   - License, v. 2.0. If a copy of the MPL was not distributed with this
-   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
-<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width="16" height="16" viewBox="0 0 16 16">
-  <style>
-    .icon:not(:target) {
-      display: none;
-    }
-
-    .icon {
-      fill: #262626;
-    }
-    .icon > .outline {
-      fill: #fff;
-    }
-
-    .icon.white {
-      fill: #fff;
-    }
-    .icon.white > .outline {
-      fill: #000;
-      fill-opacity: .5;
-    }
-  </style>
-
-  <g id="tab-audio" class="icon">
-    <path class="outline" d="M12.4,3.6l-1-0.6l-0.9,2.5H10V1.8c0-0.4-0.5-0.7-0.9-0.4L5.6,5H4C2.9,5,2,5.9,2,7v2c0,1.1,0.9,2,2,2h1.6l3.6,3.6 c0.3,0.3,0.9,0.1,0.9-0.4v-3.7h0.5l0.9,2.5l1-0.6C14,11.5,15,9.8,15,8S14,4.5,12.4,3.6z M9,13l-3-3H4c-0.6,0-1-0.4-1-1V7 c0-0.6,0.4-1,1-1h2l3-3V13z M10,9.5v-3c0.8,0,1.5,0.7,1.5,1.5S10.8,9.5,10,9.5z M11.9,11.5l-0.4-0.9C12.4,10,13,9.1,13,8 s-0.6-2-1.4-2.5l0.3-1C13.2,5.2,14,6.5,14,8S13.2,10.8,11.9,11.5z"/>
-    <path d="M4,6C3.4,6,3,6.4,3,7v2c0,0.6,0.4,1,1,1h2l3,3V3L6,6H4z M10,6.5v3c0.8,0,1.5-0.7,1.5-1.5S10.8,6.5,10,6.5z M11.9,4.5 l-0.4,0.9C12.4,6,13,6.9,13,8s-0.6,2-1.4,2.5l0.4,0.9c1.2-0.7,2.1-2,2.1-3.5S13.2,5.2,11.9,4.5z"/>
-  </g>
-  <g id="tab-audio-muted" class="icon">
-    <path class="outline" d="M5.6,5H4C2.9,5,2,5.9,2,7v2c0,0.7,0.3,1.3,0.9,1.7l-1.8,1.8l2.5,2.5l3-3l2.6,2.6c0.3,0.3,0.9,0.1,0.9-0.4V8.5l3.9-3.9 l-2.5-2.5L10,3.5V1.8c0-0.4-0.5-0.7-0.9-0.4L5.6,5z"/>
-    <path d="M11.5,3.5L9,5.9V3L6,6H4C3.4,6,3,6.4,3,7v2c0,0.6,0.4,1,1,1h0.9l-2.5,2.5l1.1,1.1l9-9L11.5,3.5z M9,13V9.7l-1.7,1.7L9,13z"/>
-  </g>
-
-  <g id="tab-audio-white" class="icon white">
-    <path class="outline" d="M12.4,3.6l-1-0.6l-0.9,2.5H10V1.8c0-0.4-0.5-0.7-0.9-0.4L5.6,5H4C2.9,5,2,5.9,2,7v2c0,1.1,0.9,2,2,2h1.6l3.6,3.6 c0.3,0.3,0.9,0.1,0.9-0.4v-3.7h0.5l0.9,2.5l1-0.6C14,11.5,15,9.8,15,8S14,4.5,12.4,3.6z M9,13l-3-3H4c-0.6,0-1-0.4-1-1V7 c0-0.6,0.4-1,1-1h2l3-3V13z M10,9.5v-3c0.8,0,1.5,0.7,1.5,1.5S10.8,9.5,10,9.5z M11.9,11.5l-0.4-0.9C12.4,10,13,9.1,13,8 s-0.6-2-1.4-2.5l0.3-1C13.2,5.2,14,6.5,14,8S13.2,10.8,11.9,11.5z"/>
-    <path d="M4,6C3.4,6,3,6.4,3,7v2c0,0.6,0.4,1,1,1h2l3,3V3L6,6H4z M10,6.5v3c0.8,0,1.5-0.7,1.5-1.5S10.8,6.5,10,6.5z M11.9,4.5 l-0.4,0.9C12.4,6,13,6.9,13,8s-0.6,2-1.4,2.5l0.4,0.9c1.2-0.7,2.1-2,2.1-3.5S13.2,5.2,11.9,4.5z"/>
-  </g>
-  <g id="tab-audio-white-muted" class="icon white">
-    <path class="outline" d="M5.6,5H4C2.9,5,2,5.9,2,7v2c0,0.7,0.3,1.3,0.9,1.7l-1.8,1.8l2.5,2.5l3-3l2.6,2.6c0.3,0.3,0.9,0.1,0.9-0.4V8.5l3.9-3.9 l-2.5-2.5L10,3.5V1.8c0-0.4-0.5-0.7-0.9-0.4L5.6,5z"/>
-    <path d="M11.5,3.5L9,5.9V3L6,6H4C3.4,6,3,6.4,3,7v2c0,0.6,0.4,1,1,1h0.9l-2.5,2.5l1.1,1.1l9-9L11.5,3.5z M9,13V9.7l-1.7,1.7L9,13z"/>
-  </g>
-
-  <g id="tab-audio-blocked" class="icon">
-    <path class="outline" d="M8,1.2C4.3,1.2,1.2,4.3,1.2,8s3.1,6.8,6.8,6.8s6.8-3.1,6.8-6.8S11.7,1.2,8,1.2z M8,11.9
-      c-2.1,0-3.9-1.7-3.9-3.9c0-2.1,1.7-3.9,3.9-3.9s3.9,1.7,3.9,3.9C11.9,10.1,10.1,11.9,8,11.9z M11.1,7.3L6.6,4.6L5.4,3.9v1.4v5.3V12
-      l1.2-0.7L11,8.6L12.2,8L11.1,7.3z"/>
-    <path d="M8,2C4.7,2,2,4.7,2,8s2.7,6,6,6s6-2.7,6-6S11.3,2,8,2z M8,12.7c-2.6,0-4.7-2.1-4.7-4.7
-      S5.4,3.3,8,3.3s4.7,2.1,4.7,4.7S10.6,12.7,8,12.7z M10.7,8L6.2,5.3v5.4L10.7,8z"/>
-  </g>
-  <g id="tab-audio-white-blocked" class="icon">
-    <path class="outline" d="M8,0c3.3,0,6.4,2.2,7.5,5.3c1.1,3.1,0.1,6.7-2.5,8.9c-2.6,2.1-6.3,2.4-9.2,0.7
-      C1,13.1-0.5,9.8,0.1,6.5C0.9,2.8,4.2,0,8,0z"/>
-    <path d="M8,2C4.7,2,2,4.7,2,8s2.7,6,6,6s6-2.7,6-6S11.3,2,8,2z M8,12.7c-2.6,0-4.7-2.1-4.7-4.7
-      S5.4,3.3,8,3.3s4.7,2.1,4.7,4.7S10.6,12.7,8,12.7z M10.7,8L6.2,5.3v5.4L10.7,8z"/>
-  </g>
-</svg>
diff --git a/browser/themes/shared/tabbrowser/tab-audio.svg b/browser/themes/shared/tabbrowser/tab-audio.svg
deleted file mode 100644
index 274e10c29..000000000
--- a/browser/themes/shared/tabbrowser/tab-audio.svg
+++ /dev/null
@@ -1,18 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!-- This Source Code Form is subject to the terms of the Mozilla Public
-   - License, v. 2.0. If a copy of the MPL was not distributed with this
-   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
-<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 16 16">
-  <style>
-    path:not(:target) {
-      display: none;
-    }
-  </style>
-
-  <path id="tab-audio" d="M4,5C2.9,5,2,5.9,2,7v2c0,1.1,0.9,2,2,2h1.2L9,14V2L5.2,5H4z M11,8c0-0.6-0.4-1-1-1v2C10.6,9,11,8.6,11,8z M13,8 c0-1.4-1-2.6-2.3-2.9L10.4,6C11.3,6.2,12,7,12,8s-0.7,1.8-1.6,2l0.4,0.9C12,10.6,13,9.4,13,8z M11.4,3.2l-0.4,0.9 C12.8,4.6,14,6.2,14,8s-1.2,3.4-2.9,3.8l0.4,0.9C13.5,12.2,15,10.3,15,8S13.5,3.8,11.4,3.2z"/>
-
-  <path id="tab-audio-muted" d="M12.5,3.4L9,6.3V2L5.2,5H4C2.9,5,2,5.9,2,7v2c0,0.9,0.6,1.6,1.4,1.9l-1.9,1.5l1,1.2l11-9L12.5,3.4z M9,14v-4l-2.5,2L9,14z"/>
-
-  <path id="tab-audio-blocked" d="M8,0C3.6,0,0,3.6,0,8s3.6,8,8,8s8-3.6,8-8S12.4,0,8,0z M5.6,11.6l6-3.6l-6-3.6V11.6z M8,14.2
-  c-3.4,0-6.2-2.8-6.2-6.2S4.6,1.8,8,1.8s6.2,2.8,6.2,6.2S11.4,14.2,8,14.2z"/>
-</svg>
diff --git a/browser/themes/shared/tabbrowser/tab-overflow-indicator.png b/browser/themes/shared/tabbrowser/tab-overflow-indicator.png
deleted file mode 100644
index 17d27c99e..000000000
--- a/browser/themes/shared/tabbrowser/tab-overflow-indicator.png
+++ /dev/null
diff --git a/browser/themes/shared/tabs.inc.css b/browser/themes/shared/tabs.inc.css
deleted file mode 100644
index c505416e4..000000000
--- a/browser/themes/shared/tabs.inc.css
+++ /dev/null
@@ -1,567 +0,0 @@
-%if 0
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-%endif
-
-:root {
-  --tab-toolbar-navbar-overlap: 1px;
-  --navbar-tab-toolbar-highlight-overlap: 1px;
-  --tab-min-height: 31px;
-}
-#TabsToolbar {
-  --tab-stroke-background-size: auto 100%;
-}
-
-%define tabCurveWidth 30px
-%define tabCurveHalfWidth 15px
-
-/* image preloading hack */
-#tabbrowser-tabs::before {
-  /* Because of bug 853415, we need to ordinal this to the first position: */
-  -moz-box-ordinal-group: 0;
-  content: '';
-  display: block;
-  background-image:
-    url(chrome://browser/skin/tabbrowser/tab-background-end.png),
-    url(chrome://browser/skin/tabbrowser/tab-background-middle.png),
-    url(chrome://browser/skin/tabbrowser/tab-background-start.png);
-}
-
-#tabbrowser-tabs {
-  min-height: var(--tab-min-height);
-}
-
-.tabbrowser-tab,
-.tabs-newtab-button {
-  -moz-appearance: none;
-  background-color: transparent;
-  border-radius: 0;
-  border-width: 0;
-  margin: 0;
-  padding: 0;
-}
-
-.tabbrowser-tab {
-  -moz-box-align: stretch;
-}
-
-/* The selected tab should appear above adjacent tabs, .tabs-newtab-button and the highlight of #nav-bar */
-.tabbrowser-tab[visuallyselected=true] {
-  position: relative;
-  z-index: 2;
-}
-
-.tab-background-middle {
-  -moz-box-flex: 1;
-  background-clip: padding-box;
-  /* Deliberately create a 1px overlap left/right to cover rounding gaps */
-  border-left: calc(@tabCurveHalfWidth@ - 1px) solid transparent;
-  border-right: calc(@tabCurveHalfWidth@ - 1px) solid transparent;
-  margin: 0 -@tabCurveHalfWidth@;
-}
-
-.tab-content {
-  padding-inline-end: 9px;
-  padding-inline-start: 9px;
-}
-
-.tab-content[pinned] {
-  padding-inline-end: 3px;
-}
-
-.tab-throbber,
-.tab-icon-image,
-.tab-sharing-icon-overlay,
-.tab-icon-sound,
-.tab-close-button {
-  margin-top: 1px;
-}
-
-.tab-throbber,
-.tab-sharing-icon-overlay,
-.tab-icon-image {
-  height: 16px;
-  width: 16px;
-  margin-inline-end: 6px;
-}
-
-.tab-icon-image {
-  list-style-image: url("chrome://mozapps/skin/places/defaultFavicon.png");
-}
-
-.tab-icon-image[sharing]:not([selected]),
-.tab-sharing-icon-overlay {
-  animation: 3s linear pulse infinite;
-}
-
-@keyframes pulse {
-  0%, 16.66%, 83.33%, 100% {
-    opacity: 0;
-  }
-  33.33%, 66.66% {
-    opacity: 1;
-  }
-}
-
-.tab-icon-image[sharing]:not([selected]) {
-  animation-delay: -1.5s;
-}
-
-.tab-sharing-icon-overlay {
-  /* 16px of the icon + 6px of margin-inline-end of .tab-icon-image */
-  margin-inline-start: -22px;
-  position: relative;
-}
-
-.tab-sharing-icon-overlay[sharing="camera"] {
-  list-style-image: url("chrome://browser/skin/notification-icons.svg#camera-sharing");
-}
-
-.tab-sharing-icon-overlay[sharing="microphone"] {
-  list-style-image: url("chrome://browser/skin/notification-icons.svg#microphone-sharing");
-}
-
-.tab-sharing-icon-overlay[sharing="screen"] {
-  list-style-image: url("chrome://browser/skin/notification-icons.svg#screen-sharing");
-}
-
-.tab-icon-overlay {
-  width: 16px;
-  height: 16px;
-  margin-top: -8px;
-  margin-inline-start: -15px;
-  margin-inline-end: -1px;
-  position: relative;
-}
-
-.tab-icon-overlay[crashed] {
-  list-style-image: url("chrome://browser/skin/tabbrowser/crashed.svg");
-}
-
-.tab-icon-overlay[soundplaying],
-.tab-icon-overlay[muted]:not([crashed]),
-.tab-icon-overlay[blocked]:not([crashed]) {
-  border-radius: 10px;
-}
-
-.tab-icon-overlay[soundplaying]:hover,
-.tab-icon-overlay[muted]:not([crashed]):hover,
-.tab-icon-overlay[blocked]:not([crashed]):hover {
-  background-color: white;
-}
-
-.tab-icon-overlay[soundplaying] {
-  list-style-image: url("chrome://browser/skin/tabbrowser/tab-audio-small.svg#tab-audio");
-}
-
-.tab-icon-overlay[muted]:not([crashed]) {
-  list-style-image: url("chrome://browser/skin/tabbrowser/tab-audio-small.svg#tab-audio-muted");
-}
-
-.tab-icon-overlay[blocked]:not([crashed]) {
-  list-style-image: url("chrome://browser/skin/tabbrowser/tab-audio-small.svg#tab-audio-blocked");
-}
-
-#TabsToolbar[brighttext] .tab-icon-overlay[soundplaying]:not([selected]):not(:hover),
-.tab-icon-overlay[soundplaying][selected]:-moz-lwtheme-brighttext:not(:hover) {
-  list-style-image: url("chrome://browser/skin/tabbrowser/tab-audio-small.svg#tab-audio-white");
-}
-
-#TabsToolbar[brighttext] .tab-icon-overlay[muted]:not([crashed]):not([selected]):not(:hover),
-.tab-icon-overlay[muted][selected]:-moz-lwtheme-brighttext:not(:hover) {
-  list-style-image: url("chrome://browser/skin/tabbrowser/tab-audio-small.svg#tab-audio-white-muted");
-}
-
-#TabsToolbar[brighttext] .tab-icon-overlay[blocked]:not([crashed]):not([selected]):not(:hover),
-.tab-icon-overlay[blocked][selected]:-moz-lwtheme-brighttext:not(:hover) {
-  list-style-image: url("chrome://browser/skin/tabbrowser/tab-audio-small.svg#tab-audio-white-blocked");
-}
-
-.tab-throbber[busy] {
-  list-style-image: url("chrome://browser/skin/tabbrowser/connecting.png");
-}
-
-.tab-throbber[progress] {
-  list-style-image: url("chrome://global/skin/icons/loading.png");
-}
-
-.tab-label {
-  margin-inline-end: 0;
-  margin-inline-start: 0;
-}
-
-.tab-close-button {
-  margin-inline-start: 4px;
-  margin-inline-end: -2px;
-  padding: 0;
-}
-
-.tab-icon-sound {
-  margin-inline-start: 4px;
-  width: 16px;
-  height: 16px;
-  padding: 0;
-}
-
-.tab-icon-sound[soundplaying],
-.tab-icon-sound[muted],
-.tab-icon-sound[blocked] {
-  list-style-image: url(chrome://browser/skin/tabbrowser/tab-audio.svg#tab-audio);
-  filter: url(chrome://browser/skin/filters.svg#fill);
-  fill: currentColor;
-}
-
-.tab-icon-sound[muted] {
-  list-style-image: url(chrome://browser/skin/tabbrowser/tab-audio.svg#tab-audio-muted);
-}
-
-.tab-icon-sound[blocked] {
-  list-style-image: url(chrome://browser/skin/tabbrowser/tab-audio.svg#tab-audio-blocked);
-}
-
-.tab-icon-sound:-moz-lwtheme-darktext[soundplaying],
-.tab-icon-sound:-moz-lwtheme-darktext[muted],
-.tab-icon-sound:-moz-lwtheme-darktext[blocked] {
-  filter: url(chrome://browser/skin/filters.svg#fill) drop-shadow(1px 1px 1px white);
-}
-
-.tab-icon-sound:-moz-lwtheme-brighttext[soundplaying],
-.tab-icon-sound:-moz-lwtheme-brighttext[muted],
-.tab-icon-sound:-moz-lwtheme-brighttext[blocked] {
-  filter: url(chrome://browser/skin/filters.svg#fill) drop-shadow(1px 1px 1px black);
-}
-
-.tab-icon-sound[soundplaying]:not(:hover),
-.tab-icon-sound[muted]:not(:hover),
-.tab-icon-sound[blocked]:not(:hover) {
-  opacity: .8;
-}
-
-.tab-icon-sound[soundplaying-scheduledremoval]:not([muted]):not(:hover),
-.tab-icon-overlay[soundplaying-scheduledremoval]:not([muted]):not(:hover) {
-  transition: opacity .3s linear var(--soundplaying-removal-delay);
-  opacity: 0;
-}
-
-.tab-background,
-.tabs-newtab-button {
-  /* overlap the tab curves */
-  margin-inline-end: -@tabCurveHalfWidth@;
-  margin-inline-start: -@tabCurveHalfWidth@;
-}
-
-.tabbrowser-arrowscrollbox > .arrowscrollbox-scrollbox {
-  padding-inline-end: @tabCurveHalfWidth@;
-  padding-inline-start: @tabCurveHalfWidth@;
-}
-
-/* Tab Overflow */
-.tabbrowser-arrowscrollbox > .arrowscrollbox-overflow-start-indicator:not([collapsed]),
-.tabbrowser-arrowscrollbox > .arrowscrollbox-overflow-end-indicator:not([collapsed]) {
-  background-image: url(chrome://browser/skin/tabbrowser/tab-overflow-indicator.png);
-  background-size: 100% 100%;
-  width: 14px;
-  margin-bottom: var(--navbar-tab-toolbar-highlight-overlap);
-  pointer-events: none;
-  position: relative;
-  z-index: 3; /* the selected tab's z-index + 1 */
-}
-
-.tabbrowser-arrowscrollbox > .arrowscrollbox-overflow-start-indicator:-moz-locale-dir(rtl),
-.tabbrowser-arrowscrollbox > .arrowscrollbox-overflow-end-indicator:-moz-locale-dir(ltr) {
-  transform: scaleX(-1);
-}
-
-.tabbrowser-arrowscrollbox > .arrowscrollbox-overflow-start-indicator:not([collapsed]) {
-  margin-inline-start: -2px;
-  margin-inline-end: -12px;
-}
-
-.tabbrowser-arrowscrollbox > .arrowscrollbox-overflow-end-indicator:not([collapsed]) {
-  margin-inline-start: -12px;
-  margin-inline-end: -2px;
-}
-
-.tabbrowser-arrowscrollbox > .arrowscrollbox-overflow-start-indicator[collapsed],
-.tabbrowser-arrowscrollbox > .arrowscrollbox-overflow-end-indicator[collapsed] {
-  opacity: 0;
-}
-
-.tabbrowser-arrowscrollbox > .arrowscrollbox-overflow-start-indicator,
-.tabbrowser-arrowscrollbox > .arrowscrollbox-overflow-end-indicator {
-  transition: opacity 150ms ease;
-}
-
-.tab-background-start[selected=true]::after,
-.tab-background-start[selected=true]::before,
-.tab-background-start,
-.tab-background-end,
-.tab-background-end[selected=true]::after,
-.tab-background-end[selected=true]::before {
-  min-height: var(--tab-min-height);
-  width: @tabCurveWidth@;
-}
-
-.tabbrowser-tab:not([visuallyselected=true]),
-.tabbrowser-tab:-moz-lwtheme {
-  color: inherit;
-}
-
-/* Selected tab */
-
-/*
- Tab background pseudo-elements which are positioned above .tab-background-start/end:
-   - ::before - provides the fill of the tab curve and is clipped to the tab shape. This is where
-                pointer events go for the curve.
-   - ::after  - provides the border/stroke of the tab curve and is overlayed above ::before.  Pointer
-                events go through to ::before to get the proper shape.
- */
-
-
-.tab-background-start[selected=true]::after,
-.tab-background-end[selected=true]::after {
-  /* position ::after on top of its parent */
-  margin-inline-start: -@tabCurveWidth@;
-  background-size: 100% 100%;
-  content: "";
-  display: -moz-box;
-  position: relative;
-}
-
-.tab-background-start[selected=true]::before,
-.tab-background-end[selected=true]::before {
-  /* all ::before pseudo elements */
-  content: "";
-  display: -moz-box;
-}
-
-.tab-background-start[selected=true]:-moz-locale-dir(ltr):not(:-moz-lwtheme)::before,
-.tab-background-end[selected=true]:-moz-locale-dir(rtl):not(:-moz-lwtheme)::before {
-  background-image: url(chrome://browser/skin/tabbrowser/tab-selected-start.svg);
-  background-size: 100% 100%;
-}
-
-.tab-background-end[selected=true]:-moz-locale-dir(ltr):not(:-moz-lwtheme)::before,
-.tab-background-start[selected=true]:-moz-locale-dir(rtl):not(:-moz-lwtheme)::before {
-  background-image: url(chrome://browser/skin/tabbrowser/tab-selected-end.svg);
-  background-size: 100% 100%;
-}
-
-/* For lightweight themes, clip the header image on start, middle, and end. */
-.tab-background-start[selected=true]:-moz-locale-dir(ltr):-moz-lwtheme::before,
-.tab-background-end[selected=true]:-moz-locale-dir(rtl):-moz-lwtheme::before {
-  clip-path: url(chrome://browser/content/browser.xul#tab-curve-clip-path-start);
-}
-
-.tab-background-end[selected=true]:-moz-locale-dir(ltr):-moz-lwtheme::before,
-.tab-background-start[selected=true]:-moz-locale-dir(rtl):-moz-lwtheme::before {
-  clip-path: url(chrome://browser/content/browser.xul#tab-curve-clip-path-end);
-}
-
-.tab-background-start[selected=true]:-moz-locale-dir(ltr)::after,
-.tab-background-end[selected=true]:-moz-locale-dir(rtl)::after {
-  background-image: url(chrome://browser/skin/tabbrowser/tab-stroke-start.png);
-}
-
-.tab-background-end[selected=true]:-moz-locale-dir(ltr)::after,
-.tab-background-start[selected=true]:-moz-locale-dir(rtl)::after {
-  background-image: url(chrome://browser/skin/tabbrowser/tab-stroke-end.png);
-}
-
-.tab-background-middle[selected=true] {
-  background-clip: padding-box, padding-box, content-box;
-  background-color: @fgTabBackgroundColor@;
-  background-image: url(chrome://browser/skin/tabbrowser/tab-active-middle.png),
-                    @fgTabTexture@,
-                    none;
-  background-repeat: repeat-x;
-  background-size: var(--tab-stroke-background-size), auto 100%;
-  /* The padding-top combined with background-clip: content-box (the bottom-most) ensure the
-     background-color doesn't extend above the top border. */
-  padding-top: 2px;
-}
-
-/* Selected tab lightweight theme styles.
-   See browser-lightweightTheme.css for information about run-time changes to LWT styles. */
-.tab-background-middle[selected=true]:-moz-lwtheme {
-  background-color: transparent;
-  background-image: url(chrome://browser/skin/tabbrowser/tab-active-middle.png),
-                    @fgTabTextureLWT@;/*,
-                    lwtHeader;*/
-  /* Don't stretch the LWT header images */
-  background-size: var(--tab-stroke-background-size), auto 100%, auto auto;
-}
-
-/* These LWT styles are normally overridden by browser-lightweightTheme.css */
-.tab-background-start[selected=true]:-moz-lwtheme::before,
-.tab-background-end[selected=true]:-moz-lwtheme::before {
-  background-image: @fgTabTextureLWT@;
-}
-
-.tab-background-start[selected=true]:-moz-lwtheme::before,
-.tab-background-end[selected=true]:-moz-lwtheme::before,
-.tab-background-middle[selected=true]:-moz-lwtheme {
-  background-color: transparent;
-}
-
-/* End selected tab */
-
-/* new tab button border and gradient on hover */
-.tabbrowser-tab:hover > .tab-stack > .tab-background:not([selected=true]),
-.tabs-newtab-button:hover {
-  background-image: url(chrome://browser/skin/tabbrowser/tab-background-start.png),
-                    url(chrome://browser/skin/tabbrowser/tab-background-middle.png),
-                    url(chrome://browser/skin/tabbrowser/tab-background-end.png);
-  background-position: left bottom, @tabCurveWidth@ bottom, right bottom;
-  background-repeat: no-repeat;
-  background-size: @tabCurveWidth@ 100%, calc(100% - (2 * @tabCurveWidth@)) 100%, @tabCurveWidth@ 100%;
-}
-
-/* Tab pointer-events */
-.tabbrowser-tab {
-  pointer-events: none;
-}
-
-.tab-background-middle,
-.tabs-newtab-button,
-.tab-icon-overlay[soundplaying],
-.tab-icon-overlay[muted]:not([crashed]),
-.tab-icon-overlay[blocked]:not([crashed]),
-.tab-icon-sound,
-.tab-close-button {
-  pointer-events: auto;
-}
-
-/* Pinned tabs */
-
-/* Pinned tab separators need position: absolute when positioned (during overflow). */
-#tabbrowser-tabs[positionpinnedtabs] > .tabbrowser-tab[pinned]::before {
-  height: 100%;
-  position: absolute;
-}
-
-.tabbrowser-tab:-moz-any([image], [pinned]) > .tab-stack > .tab-content[attention]:not([selected="true"]),
-.tabbrowser-tab > .tab-stack > .tab-content[pinned][titlechanged]:not([selected="true"]) {
-  background-image: radial-gradient(farthest-corner at center bottom, rgb(255,255,255) 3%, rgba(186,221,251,0.75) 20%, rgba(127,179,255,0.25) 40%, transparent 70%);
-  background-position: center bottom var(--tab-toolbar-navbar-overlap);
-  background-repeat: no-repeat;
-  background-size: 85% 100%;
-}
-
-.tabbrowser-tab[image] > .tab-stack > .tab-content[attention]:not([pinned]):not([selected="true"]) {
-  background-position: left bottom var(--tab-toolbar-navbar-overlap);
-  background-size: 34px 100%;
-}
-
-.tab-label[attention]:not([selected="true"]) {
-  font-weight: bold;
-}
-
-/* Tab separators */
-
-.tabbrowser-tab::after,
-.tabbrowser-tab::before {
-  margin-inline-start: -1px;
-  /* Vertical margin doesn't work here for positioned pinned tabs, see
-     bug 1198236 and bug 1300410. We're using linear-gradient instead
-     to cut off the border at the top and at the bottom. */
-  border-left: 1px solid;
-  border-image: linear-gradient(transparent 6px,
-                                currentColor 6px,
-                                currentColor calc(100% - 5px),
-                                transparent calc(100% - 5px));
-  border-image-slice: 1;
-  /* The 1px border and negative margin may amount to a different number of
-     device pixels (bug 477157), so we also set a width to match the margin. */
-  width: 1px;
-  box-sizing: border-box;
-  opacity: 0.2;
-}
-
-#TabsToolbar[brighttext] > #tabbrowser-tabs > .tabbrowser-tab::before,
-#TabsToolbar[brighttext] > #tabbrowser-tabs > .tabbrowser-tab::after {
-  opacity: 0.4;
-}
-
-/* Also show separators beside the selected tab when dragging it. */
-#tabbrowser-tabs[movingtab] > .tabbrowser-tab[beforeselected]:not([last-visible-tab])::after,
-.tabbrowser-tab:not([selected]):not([afterselected-visible]):not([afterhovered]):not([first-visible-tab]):not(:hover)::before,
-#tabbrowser-tabs:not([overflow]) > .tabbrowser-tab[last-visible-tab]:not([selected]):not([beforehovered]):not(:hover)::after {
-  content: "";
-  display: -moz-box;
-}
-
-/* New tab button */
-
-.tabs-newtab-button {
-  width: calc(36px + @tabCurveWidth@);
-}
-
-@media (min-resolution: 1.1dppx) {
-  /* image preloading hack from like lowdpi styles */
-  #tabbrowser-tabs::before {
-    background-image:
-      url(chrome://browser/skin/tabbrowser/tab-background-end@2x.png),
-      url(chrome://browser/skin/tabbrowser/tab-background-middle@2x.png),
-      url(chrome://browser/skin/tabbrowser/tab-background-start@2x.png);
-  }
-
-  .tabbrowser-tab:hover > .tab-stack > .tab-background:not([selected=true]),
-  .tabs-newtab-button:hover {
-    background-image: url(chrome://browser/skin/tabbrowser/tab-background-start@2x.png),
-                      url(chrome://browser/skin/tabbrowser/tab-background-middle@2x.png),
-                      url(chrome://browser/skin/tabbrowser/tab-background-end@2x.png);
-  }
-
-  .tab-background-middle[selected=true] {
-    background-image: url(chrome://browser/skin/tabbrowser/tab-active-middle@2x.png),
-                      @fgTabTexture@,
-                      none;
-  }
-
-  .tab-background-start[selected=true]:-moz-locale-dir(ltr)::after,
-  .tab-background-end[selected=true]:-moz-locale-dir(rtl)::after {
-    background-image: url(chrome://browser/skin/tabbrowser/tab-stroke-start@2x.png);
-  }
-
-  .tab-background-end[selected=true]:-moz-locale-dir(ltr)::after,
-  .tab-background-start[selected=true]:-moz-locale-dir(rtl)::after {
-    background-image: url(chrome://browser/skin/tabbrowser/tab-stroke-end@2x.png);
-  }
-
-  .tab-throbber[busy] {
-    list-style-image: url("chrome://browser/skin/tabbrowser/connecting@2x.png");
-  }
-
-  .tab-icon-image {
-    list-style-image: url("chrome://mozapps/skin/places/defaultFavicon@2x.png");
-  }
-
-  .tab-throbber[progress] {
-    list-style-image: url("chrome://global/skin/icons/loading@2x.png");
-  }
-}
-
-/* All tabs menupopup */
-
-.alltabs-item[tabIsVisible] {
-  /* box-shadow instead of background-color to work around native styling */
-  box-shadow: inset -5px 0 ThreeDShadow;
-}
-
-.alltabs-endimage[soundplaying],
-.alltabs-endimage[muted],
-.alltabs-endimage[blocked] {
-  list-style-image: url(chrome://browser/skin/tabbrowser/tab-audio.svg#tab-audio);
-  filter: url(chrome://browser/skin/filters.svg#fill);
-  fill: currentColor;
-}
-
-.alltabs-endimage[muted] {
-  list-style-image: url(chrome://browser/skin/tabbrowser/tab-audio.svg#tab-audio-muted);
-}
-
-.alltabs-endimage[blocked] {
-  list-style-image: url(chrome://browser/skin/tabbrowser/tab-audio.svg#tab-audio-blocked);
-}
diff --git a/browser/themes/shared/theme-switcher-icon.png b/browser/themes/shared/theme-switcher-icon.png
deleted file mode 100644
index 891e7afb1..000000000
--- a/browser/themes/shared/theme-switcher-icon.png
+++ /dev/null
diff --git a/browser/themes/shared/theme-switcher-icon@2x.png b/browser/themes/shared/theme-switcher-icon@2x.png
deleted file mode 100644
index 286adfeaa..000000000
--- a/browser/themes/shared/theme-switcher-icon@2x.png
+++ /dev/null
diff --git a/browser/themes/shared/toolbarbutton-dropdown-arrow.png b/browser/themes/shared/toolbarbutton-dropdown-arrow.png
deleted file mode 100644
index 08d9da1d1..000000000
--- a/browser/themes/shared/toolbarbutton-dropdown-arrow.png
+++ /dev/null
diff --git a/browser/themes/shared/toolbarbuttons.inc.css b/browser/themes/shared/toolbarbuttons.inc.css
deleted file mode 100644
index c043b8192..000000000
--- a/browser/themes/shared/toolbarbuttons.inc.css
+++ /dev/null
@@ -1,339 +0,0 @@
-:-moz-any(@primaryToolbarButtons@),
-#bookmarks-menu-button > .toolbarbutton-menubutton-dropmarker > .dropmarker-icon {
-  list-style-image: url("chrome://browser/skin/Toolbar.png");
-}
-
-toolbar[brighttext] :-moz-any(@primaryToolbarButtons@),
-toolbar[brighttext] #bookmarks-menu-button > .toolbarbutton-menubutton-dropmarker > .dropmarker-icon {
-  list-style-image: url(chrome://browser/skin/Toolbar-inverted.png);
-}
-
-#back-button {
-  -moz-image-region: rect(0, 36px, 18px, 18px);
-}
-
-#forward-button {
-  -moz-image-region: rect(0, 72px, 18px, 54px);
-}
-
-#home-button[cui-areatype="toolbar"] {
-  -moz-image-region: rect(0, 126px, 18px, 108px);
-}
-
-#bookmarks-menu-button[cui-areatype="toolbar"] {
-  -moz-image-region: rect(0, 144px, 18px, 126px);
-}
-
-#bookmarks-menu-button[cui-areatype="toolbar"][starred] {
-  -moz-image-region: rect(0, 162px, 18px, 144px);
-}
-
-#bookmarks-menu-button[cui-areatype="toolbar"] > .toolbarbutton-menubutton-dropmarker > .dropmarker-icon {
-  -moz-image-region: rect(0, 630px, 18px, 612px);
-}
-
-#history-panelmenu[cui-areatype="toolbar"] {
-  -moz-image-region: rect(0, 180px, 18px, 162px);
-}
-
-#downloads-button[cui-areatype="toolbar"] {
-  -moz-image-region: rect(0, 198px, 18px, 180px);
-}
-
-#add-ons-button[cui-areatype="toolbar"] {
-  -moz-image-region: rect(0, 216px, 18px, 198px);
-}
-
-#open-file-button[cui-areatype="toolbar"] {
-  -moz-image-region: rect(0, 234px, 18px, 216px);
-}
-
-#save-page-button[cui-areatype="toolbar"] {
-  -moz-image-region: rect(0, 252px, 18px, 234px);
-}
-
-#sync-button[cui-areatype="toolbar"] {
-  -moz-image-region: rect(0, 792px, 18px, 774px);
-}
-
-#containers-panelmenu[cui-areatype="toolbar"] {
-  -moz-image-region: rect(0, 810px, 18px, 792px);
-}
-
-#feed-button[cui-areatype="toolbar"] {
-  -moz-image-region: rect(0, 288px, 18px, 270px);
-}
-
-#characterencoding-button[cui-areatype="toolbar"]{
-  -moz-image-region: rect(0, 324px, 18px, 306px);
-}
-
-#new-window-button[cui-areatype="toolbar"] {
-  -moz-image-region: rect(0, 342px, 18px, 324px);
-}
-
-#e10s-button[cui-areatype="toolbar"] {
-  -moz-image-region: rect(0, 342px, 18px, 324px);
-}
-
-#e10s-button > .toolbarbutton-icon {
-  transform: scaleY(-1);
-}
-
-#new-tab-button[cui-areatype="toolbar"] {
-  -moz-image-region: rect(0, 360px, 18px, 342px);
-}
-
-#privatebrowsing-button[cui-areatype="toolbar"] {
-  -moz-image-region: rect(0, 378px, 18px, 360px);
-}
-
-#find-button[cui-areatype="toolbar"] {
-  -moz-image-region: rect(0, 396px, 18px, 378px);
-}
-
-#print-button[cui-areatype="toolbar"] {
-  -moz-image-region: rect(0, 414px, 18px, 396px);
-}
-
-%ifdef XP_MACOSX
-#restore-button,
-%endif
-#fullscreen-button[cui-areatype="toolbar"] {
-  -moz-image-region: rect(0, 432px, 18px, 414px);
-}
-
-#developer-button[cui-areatype="toolbar"] {
-  -moz-image-region: rect(0, 450px, 18px, 432px);
-}
-
-#preferences-button[cui-areatype="toolbar"] {
-  -moz-image-region: rect(0, 468px, 18px, 450px);
-}
-
-#PanelUI-menu-button {
-  -moz-image-region: rect(0, 486px, 18px, 468px);
-}
-
-#edit-controls:not(@inAnyPanel@) > #cut-button {
-  -moz-image-region: rect(0, 504px, 18px, 486px);
-}
-
-#edit-controls:not(@inAnyPanel@) > #copy-button {
-  -moz-image-region: rect(0, 522px, 18px, 504px);
-}
-
-#edit-controls:not(@inAnyPanel@) > #paste-button {
-  -moz-image-region: rect(0, 540px, 18px, 522px);
-}
-
-#zoom-controls:not(@inAnyPanel@) > #zoom-out-button {
-  -moz-image-region: rect(0, 558px, 18px, 540px);
-}
-
-#zoom-controls:not(@inAnyPanel@) > #zoom-in-button {
-  -moz-image-region: rect(0, 576px, 18px, 558px);
-}
-
-#nav-bar-overflow-button {
-  -moz-image-region: rect(0, 612px, 18px, 594px);
-}
-
-#nav-bar-overflow-button:-moz-locale-dir(rtl) > .toolbarbutton-icon {
-  transform: scaleX(-1);
-}
-
-#email-link-button[cui-areatype="toolbar"] {
-  -moz-image-region: rect(0, 666px, 18px, 648px);
-}
-
-#sidebar-button[cui-areatype="toolbar"] {
-  -moz-image-region: rect(0, 684px, 18px, 666px);
-}
-
-#panic-button[cui-areatype="toolbar"] {
-  -moz-image-region: rect(0, 702px, 18px, 684px);
-}
-
-#panic-button[cui-areatype="toolbar"][open] {
-%ifdef XP_MACOSX
-  -moz-image-region: rect(36px, 702px, 54px, 684px);
-%else
-  -moz-image-region: rect(18px, 702px, 36px, 684px);
-%endif
-}
-
-#panic-button:-moz-locale-dir(rtl) > .toolbarbutton-icon {
-  transform: scaleX(-1);
-}
-
-#webide-button[cui-areatype="toolbar"] {
-  -moz-image-region: rect(0, 738px, 18px, 720px);
-}
-
-@media (min-resolution: 1.1dppx) {
-  :-moz-any(@primaryToolbarButtons@),
-  #bookmarks-menu-button > .toolbarbutton-menubutton-dropmarker > .dropmarker-icon {
-    list-style-image: url("chrome://browser/skin/Toolbar@2x.png");
-  }
-
-  toolbar[brighttext] :-moz-any(@primaryToolbarButtons@),
-  toolbar[brighttext] #bookmarks-menu-button > .toolbarbutton-menubutton-dropmarker > .dropmarker-icon {
-    list-style-image: url("chrome://browser/skin/Toolbar-inverted@2x.png");
-  }
-
-  #back-button {
-    -moz-image-region: rect(0, 72px, 36px, 36px);
-  }
-
-  #forward-button {
-    -moz-image-region: rect(0, 144px, 36px, 108px);
-  }
-
-  #home-button[cui-areatype="toolbar"] {
-    -moz-image-region: rect(0, 252px, 36px, 216px);
-  }
-
-  #bookmarks-menu-button[cui-areatype="toolbar"] {
-    -moz-image-region: rect(0, 288px, 36px, 252px);
-  }
-
-  #bookmarks-menu-button[cui-areatype="toolbar"][starred] {
-    -moz-image-region: rect(0, 324px, 36px, 288px);
-  }
-
-  #bookmarks-menu-button[cui-areatype="toolbar"] > .toolbarbutton-menubutton-dropmarker > .dropmarker-icon {
-    -moz-image-region: rect(0px, 1260px, 36px, 1224px);
-  }
-
-  #history-panelmenu[cui-areatype="toolbar"] {
-    -moz-image-region: rect(0, 360px, 36px, 324px);
-  }
-
-  #downloads-button[cui-areatype="toolbar"] {
-    -moz-image-region: rect(0, 396px, 36px, 360px);
-  }
-
-  #add-ons-button[cui-areatype="toolbar"] {
-    -moz-image-region: rect(0, 432px, 36px, 396px);
-  }
-
-  #open-file-button[cui-areatype="toolbar"] {
-    -moz-image-region: rect(0, 468px, 36px, 432px);
-  }
-
-  #save-page-button[cui-areatype="toolbar"] {
-    -moz-image-region: rect(0, 504px, 36px, 468px);
-  }
-
-  #sync-button[cui-areatype="toolbar"] {
-    -moz-image-region: rect(0, 1584px, 36px, 1548px);
-  }
-
-  #containers-panelmenu[cui-areatype="toolbar"] {
-    -moz-image-region: rect(0, 1620px, 36px, 1584px);
-  }
-
-  #feed-button[cui-areatype="toolbar"] {
-    -moz-image-region: rect(0, 576px, 36px, 540px);
-  }
-
-  #characterencoding-button[cui-areatype="toolbar"] {
-    -moz-image-region: rect(0, 648px, 36px, 612px);
-  }
-
-  #new-window-button[cui-areatype="toolbar"] {
-    -moz-image-region: rect(0, 684px, 36px, 648px);
-  }
-
-  #e10s-button[cui-areatype="toolbar"] {
-    -moz-image-region: rect(0, 684px, 36px, 648px);
-  }
-
-  #e10s-button > .toolbarbutton-icon {
-    transform: scaleY(-1);
-  }
-
-  #new-tab-button[cui-areatype="toolbar"] {
-    -moz-image-region: rect(0, 720px, 36px, 684px);
-  }
-
-  #privatebrowsing-button[cui-areatype="toolbar"] {
-    -moz-image-region: rect(0, 756px, 36px, 720px);
-  }
-
-  #find-button[cui-areatype="toolbar"] {
-    -moz-image-region: rect(0, 792px, 36px, 756px);
-  }
-
-  #print-button[cui-areatype="toolbar"] {
-    -moz-image-region: rect(0, 828px, 36px, 792px);
-  }
-
-%ifdef XP_MACOSX
-  #restore-button,
-%endif
-  #fullscreen-button[cui-areatype="toolbar"] {
-    -moz-image-region: rect(0, 864px, 36px, 828px);
-  }
-
-  #developer-button[cui-areatype="toolbar"] {
-    -moz-image-region: rect(0, 900px, 36px, 864px);
-  }
-
-  #preferences-button[cui-areatype="toolbar"] {
-    -moz-image-region: rect(0, 936px, 36px, 900px);
-  }
-
-  #PanelUI-menu-button {
-    -moz-image-region: rect(0, 972px, 36px, 936px);
-  }
-
-  #edit-controls[cui-areatype="toolbar"] > #cut-button {
-    -moz-image-region: rect(0, 1008px, 36px, 972px);
-  }
-
-  #edit-controls[cui-areatype="toolbar"] > #copy-button {
-    -moz-image-region: rect(0, 1044px, 36px, 1008px);
-  }
-
-  #edit-controls[cui-areatype="toolbar"] > #paste-button {
-    -moz-image-region: rect(0, 1080px, 36px, 1044px);
-  }
-
-  #zoom-controls[cui-areatype="toolbar"] > #zoom-out-button {
-    -moz-image-region: rect(0, 1116px, 36px, 1080px);
-  }
-
-  #zoom-controls[cui-areatype="toolbar"] > #zoom-in-button {
-    -moz-image-region: rect(0, 1152px, 36px, 1116px);
-  }
-
-  #nav-bar-overflow-button {
-    -moz-image-region: rect(0, 1224px, 36px, 1188px);
-  }
-
-  #email-link-button[cui-areatype="toolbar"] {
-    -moz-image-region: rect(0, 1332px, 36px, 1296px);
-  }
-
-  #sidebar-button[cui-areatype="toolbar"] {
-    -moz-image-region: rect(0, 1368px, 36px, 1332px);
-  }
-
-  #panic-button[cui-areatype="toolbar"] {
-    -moz-image-region: rect(0, 1404px, 36px, 1368px);
-  }
-
-  #panic-button[cui-areatype="toolbar"][open] {
-%ifdef XP_MACOSX
-    -moz-image-region: rect(72px, 1404px, 108px, 1368px);
-%else
-    -moz-image-region: rect(36px, 1404px, 72px, 1368px);
-%endif
-  }
-
-  #webide-button[cui-areatype="toolbar"] {
-    -moz-image-region: rect(0, 1476px, 36px, 1440px);
-  }
-}
diff --git a/browser/themes/shared/translation/infobar.inc.css b/browser/themes/shared/translation/infobar.inc.css
deleted file mode 100644
index 50d1acc01..000000000
--- a/browser/themes/shared/translation/infobar.inc.css
+++ /dev/null
@@ -1,95 +0,0 @@
-%if 0
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-%endif
-notification[value="translation"] .messageImage {
-  list-style-image: url(chrome://browser/skin/translation-16.png);
-  -moz-image-region: rect(0, 32px, 16px, 16px);
-}
-
-@media (min-resolution: 1.25dppx) {
-  notification[value="translation"] .messageImage {
-    list-style-image: url(chrome://browser/skin/translation-16@2x.png);
-    -moz-image-region: rect(0, 64px, 32px, 32px);
-  }
-}
-
-notification[value="translation"][state="translating"] .messageImage {
-  list-style-image: url(chrome://browser/skin/translating-16.png);
-  -moz-image-region: auto;
-}
-
-@media (min-resolution: 1.25dppx) {
-  notification[value="translation"][state="translating"] .messageImage {
-    list-style-image: url(chrome://browser/skin/translating-16@2x.png);
-  }
-}
-
-notification[value="translation"] hbox[anonid="details"] {
-  overflow: hidden;
-}
-
-notification[value="translation"] button,
-notification[value="translation"] menulist {
-  -moz-appearance: none;
-  border-width: 1px;
-  -moz-border-top-colors: none;
-  -moz-border-right-colors: none;
-  -moz-border-bottom-colors: none;
-  -moz-border-left-colors: none;
-  border-radius: 2px;
-  min-width: 0;
-  box-shadow: 0 1px rgba(255, 255, 255, 0.5), 0 1px rgba(255, 255, 255, 0.5) inset;
-}
-
-notification[value="translation"] menulist > .menulist-dropmarker {
-  -moz-appearance: toolbarbutton-dropdown;
-  border: none;
-  background-color: transparent;
-  margin: auto;
-  padding: 5px 0;
-}
-
-.translation-menupopup arrowscrollbox {
-  padding-bottom: 0;
-}
-
-.translation-attribution {
-  cursor: pointer;
-  -moz-box-align: end;
-  font-size: small;
-}
-
-.translation-attribution > label {
-  margin-bottom: 0;
-}
-
-.translation-attribution > image {
-  width: 70px;
-}
-
-.translation-welcome-panel {
-  width: 305px;
-}
-
-.translation-welcome-logo {
-  height: 32px;
-  width: 32px;
-  list-style-image: url(chrome://browser/skin/translation-16@2x.png);
-  -moz-image-region: rect(0, 64px, 32px, 32px);
-}
-
-.translation-welcome-content {
-  margin-inline-start: 16px;
-}
-
-.translation-welcome-headline {
-  font-size: larger;
-  font-weight: bold;
-}
-
-.translation-welcome-body {
-  padding: 1em 0;
-  margin: 0 0;
-}
diff --git a/browser/themes/shared/translation/translating-16.png b/browser/themes/shared/translation/translating-16.png
deleted file mode 100644
index 71ca37c22..000000000
--- a/browser/themes/shared/translation/translating-16.png
+++ /dev/null
diff --git a/browser/themes/shared/translation/translating-16@2x.png b/browser/themes/shared/translation/translating-16@2x.png
deleted file mode 100644
index ab6184047..000000000
--- a/browser/themes/shared/translation/translating-16@2x.png
+++ /dev/null
diff --git a/browser/themes/shared/translation/translation-16.png b/browser/themes/shared/translation/translation-16.png
deleted file mode 100644
index 4b42dedcf..000000000
--- a/browser/themes/shared/translation/translation-16.png
+++ /dev/null
diff --git a/browser/themes/shared/translation/translation-16@2x.png b/browser/themes/shared/translation/translation-16@2x.png
deleted file mode 100644
index 2105a3e4a..000000000
--- a/browser/themes/shared/translation/translation-16@2x.png
+++ /dev/null
diff --git a/browser/themes/shared/undoCloseTab.png b/browser/themes/shared/undoCloseTab.png
deleted file mode 100644
index 1d629c82c..000000000
--- a/browser/themes/shared/undoCloseTab.png
+++ /dev/null
diff --git a/browser/themes/shared/undoCloseTab@2x.png b/browser/themes/shared/undoCloseTab@2x.png
deleted file mode 100644
index 4854c5681..000000000
--- a/browser/themes/shared/undoCloseTab@2x.png
+++ /dev/null
diff --git a/browser/themes/shared/update-badge-failed.svg b/browser/themes/shared/update-badge-failed.svg
deleted file mode 100644
index e31e6ec6b..000000000
--- a/browser/themes/shared/update-badge-failed.svg
+++ /dev/null
@@ -1,6 +0,0 @@
-<!-- This Source Code Form is subject to the terms of the Mozilla Public
-   - License, v. 2.0. If a copy of the MPL was not distributed with this
-   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
-<svg xmlns="http://www.w3.org/2000/svg" width="10px" height="10px">
-  <path d="M5,6C4.2,6,3.5,6.7,3.5,7.5S4.2,9,5,9s1.5-0.7,1.5-1.5S5.8,6,5,6z M5,5L5,5c0.6,0,1-0.4,1-1l0.2-2.8 C6.2,0.5,5.7,0,5,0S3.8,0.5,3.8,1.2L4,4C4,4.6,4.4,5,5,5z" fill="#fff"/>
-</svg>
diff --git a/browser/themes/shared/update-badge.svg b/browser/themes/shared/update-badge.svg
deleted file mode 100644
index 3b692e526..000000000
--- a/browser/themes/shared/update-badge.svg
+++ /dev/null
@@ -1,6 +0,0 @@
-<!-- This Source Code Form is subject to the terms of the Mozilla Public

-   - License, v. 2.0. If a copy of the MPL was not distributed with this

-   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->

-<svg xmlns="http://www.w3.org/2000/svg" width="10px" height="10px">

-  <polygon points="4,9 4,5 2,5 5,1 8,5 6,5 6,9" fill="#fff"/>

-</svg>

diff --git a/browser/themes/shared/urlbar-star.svg b/browser/themes/shared/urlbar-star.svg
deleted file mode 100644
index 3080aca1a..000000000
--- a/browser/themes/shared/urlbar-star.svg
+++ /dev/null
@@ -1,20 +0,0 @@
-<?xml version="1.0"?>

-<!-- This Source Code Form is subject to the terms of the Mozilla Public

-   - License, v. 2.0. If a copy of the MPL was not distributed with this

-   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->

-<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width="16" height="16" viewBox="0 0 16 16">

-  <style>

-    path:not(:target) {

-      display: none;

-    }

-    path {

-      fill: #b2b2b2;

-    }

-    path[id$="-inverted"] {

-      fill: #fff;

-    }

-  </style>

-

-	<path id="star" d="M8.7,0.5l2,4.3l4.6,0.7c0.6,0.1,0.9,0.9,0.4,1.4l-3.3,3.4l0.8,4.8c0.1,0.7-0.6,1.2-1.1,0.9L8,13.7l-4.1,2.3 c-0.6,0.3-1.2-0.2-1.1-0.9l0.8-4.8L0.2,6.9C-0.2,6.4,0,5.6,0.7,5.5l4.6-0.7l2-4.3C7.6-0.1,8.4-0.1,8.7,0.5z"/>

-	<path id="star-inverted" d="M8.7,0.5l2,4.3l4.6,0.7c0.6,0.1,0.9,0.9,0.4,1.4l-3.3,3.4l0.8,4.8c0.1,0.7-0.6,1.2-1.1,0.9L8,13.7l-4.1,2.3 c-0.6,0.3-1.2-0.2-1.1-0.9l0.8-4.8L0.2,6.9C-0.2,6.4,0,5.6,0.7,5.5l4.6-0.7l2-4.3C7.6-0.1,8.4-0.1,8.7,0.5z"/>

-</svg>

diff --git a/browser/themes/shared/urlbar-tab.svg b/browser/themes/shared/urlbar-tab.svg
deleted file mode 100644
index 87a2c7f12..000000000
--- a/browser/themes/shared/urlbar-tab.svg
+++ /dev/null
@@ -1,21 +0,0 @@
-<?xml version="1.0"?>
-<!-- This Source Code Form is subject to the terms of the Mozilla Public
-   - License, v. 2.0. If a copy of the MPL was not distributed with this
-   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
-<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width="16" height="16" viewBox="0 0 16 16">
-  <style>
-    path:not(:target) {
-      display: none;
-    }
-    path {
-      fill: #b2b2b2;
-    }
-    path[id$="-inverted"] {
-      fill: #fff;
-    }
-  </style>
-
-  <path id="tab" d="M14,9.5V6c0-1.7-1.3-3-3-3H5C3.3,3,2,4.3,2,6v3.5C2,10.3,1.3,11,0.5,11h0C0.2,11,0,11.2,0,11.5v1 C0,12.8,0.2,13,0.5,13h15c0.3,0,0.5-0.2,0.5-0.5v-1c0-0.3-0.2-0.5-0.5-0.5h0C14.7,11,14,10.3,14,9.5z"/>
-  <path id="tab-inverted" d="M14,9.5V6c0-1.7-1.3-3-3-3H5C3.3,3,2,4.3,2,6v3.5C2,10.3,1.3,11,0.5,11h0C0.2,11,0,11.2,0,11.5v1 C0,12.8,0.2,13,0.5,13h15c0.3,0,0.5-0.2,0.5-0.5v-1c0-0.3-0.2-0.5-0.5-0.5h0C14.7,11,14,10.3,14,9.5z"/>
-
-</svg>
diff --git a/browser/themes/shared/urlbarSearchSuggestionsNotification.inc.css b/browser/themes/shared/urlbarSearchSuggestionsNotification.inc.css
deleted file mode 100644
index a34c2bf11..000000000
--- a/browser/themes/shared/urlbarSearchSuggestionsNotification.inc.css
+++ /dev/null
@@ -1,54 +0,0 @@
-#PopupAutoCompleteRichResult > hbox[anonid="search-suggestions-notification"] {
-  border-bottom: 1px solid var(--panel-separator-color);
-  background-color: hsla(210, 4%, 10%, 0.07);
-  padding: 6px 0;
-  padding-inline-start: 44px;
-  padding-inline-end: 6px;
-  background-image: url("chrome://browser/skin/info.svg");
-  background-clip: padding-box;
-  background-position: 20px center;
-  background-repeat: no-repeat;
-  background-size: 16px 16px;
-}
-
-#PopupAutoCompleteRichResult > hbox[anonid="search-suggestions-notification"]:-moz-locale-dir(rtl) {
-  background-position: right 20px center;
-}
-
-#PopupAutoCompleteRichResult > hbox[anonid="search-suggestions-notification"] > description {
-  margin: 0;
-  padding: 0;
-}
-
-#PopupAutoCompleteRichResult > hbox[anonid="search-suggestions-notification"] > description > label.text-link {
-  margin-inline-start: 0;
-}
-
-#PopupAutoCompleteRichResult > hbox[anonid="search-suggestions-notification"] > button {
-  -moz-appearance: none;
-  min-width: 80px;
-  border-radius: 3px;
-  padding: 4px 16px;
-  margin: 0;
-  margin-inline-start: 10px;
-}
-
-#PopupAutoCompleteRichResult > hbox[anonid="search-suggestions-notification"] > button[anonid="search-suggestions-notification-disable"] {
-  color: hsl(210, 0%, 38%);
-  background-color: hsl(210, 0%, 88%);
-  border: 1px solid hsl(210, 0%, 82%);
-}
-
-#PopupAutoCompleteRichResult > hbox[anonid="search-suggestions-notification"] > button[anonid="search-suggestions-notification-disable"]:hover {
-  background-color: hsl(210, 0%, 84%);
-}
-
-#PopupAutoCompleteRichResult > hbox[anonid="search-suggestions-notification"] > button[anonid="search-suggestions-notification-enable"] {
-  color: white;
-  background-color: hsl(93, 82%, 44%);
-  border: 1px solid hsl(93, 82%, 44%);
-}
-
-#PopupAutoCompleteRichResult > hbox[anonid="search-suggestions-notification"] > button[anonid="search-suggestions-notification-enable"]:hover {
-  background-color: hsl(93, 82%, 40%);
-}
diff --git a/browser/themes/shared/warning-white.svg b/browser/themes/shared/warning-white.svg
deleted file mode 100644
index 942c23cf6..000000000
--- a/browser/themes/shared/warning-white.svg
+++ /dev/null
@@ -1,6 +0,0 @@
-<!-- This Source Code Form is subject to the terms of the Mozilla Public
-   - License, v. 2.0. If a copy of the MPL was not distributed with this
-   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
-<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16">
-  <path fill="#fff" stroke="#000" stroke-opacity="0.3" d="M15.4,12.9 9.46,1.41 C9.12,0.756 8.59,0.381 8,0.381 7.41,0.381 6.88,0.756 6.54,1.41 L0.642,12.9 c-0.331,0.6 -0.348,1.3 -0.05,1.9 0.299,0.5 0.854,0.8 1.534,0.8 H13.9 c0.6,0 1.2,-0.3 1.5,-0.8 0.3,-0.6 0.3,-1.3 0,-1.9z M8.83,5.07 8.65,10.5 H7.34 L7.15,5.07 H8.83z M8,13.7 c-0.55,0 -0.99,-0.5 -0.99,-1 0,-0.6 0.44,-1 0.99,-1 0.56,0 0.99,0.4 0.99,1 0,0.5 -0.43,1 -0.99,1z"/>
-</svg>
diff --git a/browser/themes/shared/warning.svg b/browser/themes/shared/warning.svg
deleted file mode 100644
index 7befd73d9..000000000
--- a/browser/themes/shared/warning.svg
+++ /dev/null
@@ -1,7 +0,0 @@
-<!-- This Source Code Form is subject to the terms of the Mozilla Public

-   - License, v. 2.0. If a copy of the MPL was not distributed with this

-   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->

-<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 16 16">

-  <path fill="#ffbf00" d="M14.8,12.5L9.3,1.9C9,1.3,8.5,1,8,1C7.5,1,7,1.3,6.7,1.9L1.2,12.5c-0.3,0.6-0.3,1.2,0,1.7C1.5,14.7,2,15,2.6,15h10.8 c0.6,0,1.1-0.3,1.4-0.8C15.1,13.7,15.1,13.1,14.8,12.5z"/>

-  <path fill="#fff" d="M8,11c-0.8,0-1.5,0.7-1.5,1.5C6.5,13.3,7.2,14,8,14 c0.8,0,1.5-0.7,1.5-1.5C9.5,11.7,8.8,11,8,11z M8,10L8,10C8.6,10,9,9.6,9,9l0.2-4.2c0-0.7-0.5-1.2-1.2-1.2S6.8,4.1,6.8,4.8L7,9 C7,9.6,7.4,10,8,10z"/>

-</svg>

diff --git a/browser/themes/shared/webrtc/camera-white-16.png b/browser/themes/shared/webrtc/camera-white-16.png
deleted file mode 100644
index e1e360bd8..000000000
--- a/browser/themes/shared/webrtc/camera-white-16.png
+++ /dev/null
diff --git a/browser/themes/shared/webrtc/camera-white-16@2x.png b/browser/themes/shared/webrtc/camera-white-16@2x.png
deleted file mode 100644
index ddbbf5083..000000000
--- a/browser/themes/shared/webrtc/camera-white-16@2x.png
+++ /dev/null
diff --git a/browser/themes/shared/webrtc/microphone-white-16.png b/browser/themes/shared/webrtc/microphone-white-16.png
deleted file mode 100644
index 0091529ba..000000000
--- a/browser/themes/shared/webrtc/microphone-white-16.png
+++ /dev/null
diff --git a/browser/themes/shared/webrtc/microphone-white-16@2x.png b/browser/themes/shared/webrtc/microphone-white-16@2x.png
deleted file mode 100644
index 5bf1f5c62..000000000
--- a/browser/themes/shared/webrtc/microphone-white-16@2x.png
+++ /dev/null
diff --git a/browser/themes/shared/webrtc/screen-white-16.png b/browser/themes/shared/webrtc/screen-white-16.png
deleted file mode 100644
index 045bfd35a..000000000
--- a/browser/themes/shared/webrtc/screen-white-16.png
+++ /dev/null
diff --git a/browser/themes/shared/webrtc/screen-white-16@2x.png b/browser/themes/shared/webrtc/screen-white-16@2x.png
deleted file mode 100644
index 1e5fca5d6..000000000
--- a/browser/themes/shared/webrtc/screen-white-16@2x.png
+++ /dev/null
diff --git a/browser/themes/tab-svgs.mozbuild b/browser/themes/tab-svgs.mozbuild
deleted file mode 100644
index b1259b04e..000000000
--- a/browser/themes/tab-svgs.mozbuild
+++ /dev/null
@@ -1,22 +0,0 @@
-# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
-# vim: set filetype=python:
-# This Source Code Form is subject to the terms of the Mozilla Public
-# License, v. 2.0. If a copy of the MPL was not distributed with this
-# file, You can obtain one at http://mozilla.org/MPL/2.0/.
-
-script = '/browser/themes/preprocess-tab-svgs.py'
-input = ['/browser/themes/shared/tab-selected.svg']
-
-# Context variables can't be used inside functions, so hack around that.
-generated_files = GENERATED_FILES
-
-def generate_svg(svg_name, script_function):
-    global generated_files
-    generated_files += [svg_name]
-    svg = generated_files[svg_name]
-    svg.script = script + ':' + script_function
-    svg.inputs = input
-
-generate_svg('tab-selected-end.svg', 'tab_side_end')
-generate_svg('tab-selected-start.svg', 'tab_side_start')
-
diff --git a/browser/themes/windows/Info.png b/browser/themes/windows/Info.png
deleted file mode 100644
index f5dfb65a3..000000000
--- a/browser/themes/windows/Info.png
+++ /dev/null
diff --git a/browser/themes/windows/Privacy-16.png b/browser/themes/windows/Privacy-16.png
deleted file mode 100644
index ff0c565a8..000000000
--- a/browser/themes/windows/Privacy-16.png
+++ /dev/null
diff --git a/browser/themes/windows/Toolbar-inverted.png b/browser/themes/windows/Toolbar-inverted.png
deleted file mode 100644
index 2311803d8..000000000
--- a/browser/themes/windows/Toolbar-inverted.png
+++ /dev/null
diff --git a/browser/themes/windows/Toolbar-inverted@2x.png b/browser/themes/windows/Toolbar-inverted@2x.png
deleted file mode 100644
index 289c57380..000000000
--- a/browser/themes/windows/Toolbar-inverted@2x.png
+++ /dev/null
diff --git a/browser/themes/windows/Toolbar-win7.png b/browser/themes/windows/Toolbar-win7.png
deleted file mode 100644
index b191ce2aa..000000000
--- a/browser/themes/windows/Toolbar-win7.png
+++ /dev/null
diff --git a/browser/themes/windows/Toolbar-win7@2x.png b/browser/themes/windows/Toolbar-win7@2x.png
deleted file mode 100644
index 033d87dff..000000000
--- a/browser/themes/windows/Toolbar-win7@2x.png
+++ /dev/null
diff --git a/browser/themes/windows/Toolbar-win8.png b/browser/themes/windows/Toolbar-win8.png
deleted file mode 100644
index 7e06de7f1..000000000
--- a/browser/themes/windows/Toolbar-win8.png
+++ /dev/null
diff --git a/browser/themes/windows/Toolbar-win8@2x.png b/browser/themes/windows/Toolbar-win8@2x.png
deleted file mode 100644
index 6b205ea6f..000000000
--- a/browser/themes/windows/Toolbar-win8@2x.png
+++ /dev/null
diff --git a/browser/themes/windows/Toolbar.png b/browser/themes/windows/Toolbar.png
deleted file mode 100644
index 4ae11be4d..000000000
--- a/browser/themes/windows/Toolbar.png
+++ /dev/null
diff --git a/browser/themes/windows/Toolbar@2x.png b/browser/themes/windows/Toolbar@2x.png
deleted file mode 100644
index 33c63fdbb..000000000
--- a/browser/themes/windows/Toolbar@2x.png
+++ /dev/null
diff --git a/browser/themes/windows/aboutSessionRestore-window-icon.png b/browser/themes/windows/aboutSessionRestore-window-icon.png
deleted file mode 100644
index c2d15ad7b..000000000
--- a/browser/themes/windows/aboutSessionRestore-window-icon.png
+++ /dev/null
diff --git a/browser/themes/windows/aboutSyncTabs.css b/browser/themes/windows/aboutSyncTabs.css
deleted file mode 100644
index 4cedad649..000000000
--- a/browser/themes/windows/aboutSyncTabs.css
+++ /dev/null
@@ -1,101 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-#tabs-display,
-#tabsList {
-  background-color: transparent;
-  -moz-appearance: none;
-  margin: 0;
-}
-
-#tabsList {
-  width: 100%;
-}
-
-#tabs-display {
-  background: #fff url(chrome://browser/skin/sync-bg.png) repeat-x center -80px;
-}
-
-#headers {
-  background: url(chrome://browser/skin/sync-32.png) no-repeat;
-  margin-top: 4px;
-  width: 45em;
-  height: 32px;
-  margin-inline-start: 2em;
-  margin-inline-end: 2em;
-}
-
-#tabsListHeading {
-  font-size: 140%;
-  font-weight: bold;
-  margin-inline-start: 40px;
-}
-
-richlistitem {
-  margin-inline-end: 2em;
-}
-
-richlistitem[selected="true"],
-richlistitem:focus {
-  outline-style: none;
-}
-
-richlistitem[type="tab"] {
-  min-height: 3em;
-  border: #999999 1px solid !important;
-  padding: 2px 5px;
-  margin-bottom: 4px;
-  margin-inline-start: 4em;
-  border-radius: 6px;
-  background-color: menu;
-  width: 44em;
-  opacity: 0.9;
-  box-shadow:
-    inset rgba(255, 255, 255, 0.5) 0 1px 0px,
-    inset rgba(0, 0, 0, 0.1) 0 -2px 0px,
-    rgba(0, 0, 0, 0.1) 0px 1px 0px;
-}
-
-richlistitem[type="tab"][selected="true"] {
-  background-color: -moz-MenuHover;
-}
-
-richlistitem[type="client"] {
-  min-height: 2em;
-  color: #000000;
-  margin-inline-start: 2em;
-  margin-top: 2px;
-  margin-bottom: 3px;
-  width: 42em;
-  border-radius: 6px;
-  background-color: transparent;
-  -moz-user-focus: ignore !important;
-}
-richlistitem.mobile[type="client"] {
-  list-style-image: url("chrome://browser/skin/sync-mobileIcon.svg#icon");
-}
-richlistitem.desktop[type="client"] {
-  list-style-image: url("chrome://browser/skin/sync-desktopIcon.svg#icon");
-}
-
-.title,
-.clientName {
-  color: #000000;
-  font-size: 1.1em;
-}
-
-.title[selected="true"],
-.url[selected="true"] {
-  color: inherit;
-}
-
-.url {
-  color: -moz-nativehyperlinktext;
-  font-size: 0.95em;
-}
-
-.tabIcon {
-  padding-inline-start: 2px;
-  padding-top: 2px;
-}
diff --git a/browser/themes/windows/actionicon-tab-win7.png b/browser/themes/windows/actionicon-tab-win7.png
deleted file mode 100644
index 8437c7655..000000000
--- a/browser/themes/windows/actionicon-tab-win7.png
+++ /dev/null
diff --git a/browser/themes/windows/actionicon-tab.png b/browser/themes/windows/actionicon-tab.png
deleted file mode 100644
index 52169a480..000000000
--- a/browser/themes/windows/actionicon-tab.png
+++ /dev/null
diff --git a/browser/themes/windows/actionicon-tab@2x.png b/browser/themes/windows/actionicon-tab@2x.png
deleted file mode 100644
index 6a4be3741..000000000
--- a/browser/themes/windows/actionicon-tab@2x.png
+++ /dev/null
diff --git a/browser/themes/windows/browser-aero.css b/browser/themes/windows/browser-aero.css
deleted file mode 100644
index dbac6bb7a..000000000
--- a/browser/themes/windows/browser-aero.css
+++ /dev/null
@@ -1,627 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-%define glassActiveBorderColor rgb(37, 44, 51)
-%define glassInactiveBorderColor rgb(102, 102, 102)
-
-@media not all and (-moz-windows-classic) {
-  #main-window[sizemode="normal"] > #tab-view-deck > #browser-panel > #navigator-toolbox > #toolbar-menubar {
-    margin-top: 1px;
-  }
-}
-
-@media (-moz-windows-default-theme) {
-  .sidebar-header,
-  #sidebar-header {
-    -moz-appearance: none;
-    border-bottom: none;
-    text-shadow: none;
-  }
-
-  .sidebar-title,
-  #sidebar-title {
-    font-weight: bold;
-  }
-
-  .sidebar-splitter {
-    border: 0;
-    border-inline-end: 1px solid ThreeDLightShadow;
-    min-width: 0;
-    width: 3px;
-    background-color: transparent;
-    margin-inline-start: -3px;
-    position: relative;
-  }
-
-  #appcontent ~ .sidebar-splitter {
-    border-inline-start: 1px solid ThreeDLightShadow;
-    border-inline-end: none;
-    margin-inline-start: 0;
-    margin-inline-end: -3px;
-  }
-
-  .menu-accel,
-  .menu-iconic-accel {
-    color: graytext;
-  }
-
-  @media (-moz-os-version: windows-win7) {
-    .sidebar-header:not(:-moz-lwtheme),
-    #sidebar-header:not(:-moz-lwtheme) {
-      background-color: #EEF3FA;
-    }
-
-    .sidebar-splitter,
-    #appcontent ~ .sidebar-splitter {
-      border-color: #A9B7C9;
-    }
-
-    #navigator-toolbox > toolbar:not(#toolbar-menubar):not(#TabsToolbar):not(:-moz-lwtheme),
-    #browser-bottombox:not(:-moz-lwtheme),
-    .browserContainer > findbar {
-      background-color: @customToolbarColor@;
-    }
-
-    .tab-background-middle[selected=true]:not(:-moz-lwtheme) {
-      background-color: @customToolbarColor@;
-    }
-  }
-}
-
-@media (-moz-windows-compositor) {
-  #main-window {
-    -moz-appearance: -moz-win-glass;
-  }
-
-
-  /* On win10, if we don't set this on the entire browser container including
-   * the sidebar, if the sidebar is open the accent color bleeds through in
-   * the titlebar */
-  #browser {
-    -moz-appearance: -moz-win-exclude-glass;
-  }
-
-  @media (-moz-os-version: windows-win10) {
-    /* Draw XUL caption buttons and background on Windows 10 */
-    @media (-moz-windows-default-theme) {
-      #main-window {
-        background-color: hsl(0, 0%, 78%);
-      }
-
-      :root[tabsintitlebar] .tab-label:-moz-window-inactive {
-        /* Calculated to match the opacity change of Windows Explorer
-           titlebar text change for inactive windows. */
-        opacity: .6;
-      }
-    }
-
-    @media not all and (-moz-windows-accent-color-applies) {
-      /* Default styling for when no accent color is applied */
-      #main-window:not(:-moz-window-inactive):not(:-moz-lwtheme) {
-        background-color: hsl(235, 33%, 19%);
-      }
-      
-      :root:not(:-moz-window-inactive):not(:-moz-lwtheme) {
-        --titlebar-text-color: white;
-      }
-      
-      #titlebar-min:not(:-moz-window-inactive):not(:-moz-lwtheme) {
-        list-style-image: url(chrome://browser/skin/caption-buttons.svg#minimize-highlight);
-      }
-
-      #titlebar-max:not(:-moz-window-inactive):not(:-moz-lwtheme) {
-        list-style-image: url(chrome://browser/skin/caption-buttons.svg#maximize-highlight);
-      }
-
-      #main-window[sizemode="maximized"] #titlebar-max:not(:-moz-window-inactive):not(:-moz-lwtheme) {
-        list-style-image: url(chrome://browser/skin/caption-buttons.svg#restore-highlight);
-      }
-      
-      #titlebar-close:not(:-moz-window-inactive):not(:-moz-lwtheme) {
-        list-style-image: url(chrome://browser/skin/caption-buttons.svg#close-highlight);
-      }
-
-      .titlebar-button:not(#titlebar-close):not(:-moz-window-inactive):not(:-moz-lwtheme):hover {
-        background-color: hsla(0, 0%, 100%, .17);
-      }
-
-      .titlebar-button:not(#titlebar-close):not(:-moz-window-inactive):not(:-moz-lwtheme):hover:active	{
-        background-color: hsla(0, 0%, 100%, .27);
-        transition: none;
-      }
-      
-      #titlebar-close:not(:-moz-window-inactive):not(:-moz-lwtheme):hover {
-        background-color: hsla(0, 86%, 49%, 1);
-      }
-
-      #titlebar-close:not(:-moz-window-inactive):not(:-moz-lwtheme):hover:active	{
-        background-color: hsla(0, 60%, 39%, 1);
-        transition: none;
-      }
-    }
-
-    @media (-moz-windows-accent-color-applies) { 
-      /* Styling for when an accent color is applied to the titlebar */
-      #main-window:not(:-moz-window-inactive):not(:-moz-lwtheme) {
-        background-color: -moz-win-accentcolor;
-      }
-      
-      :root:not(:-moz-window-inactive):not(:-moz-lwtheme) {
-        --titlebar-text-color: -moz-win-accentcolortext;
-      }
-      
-      #titlebar-min {
-        list-style-image: url(chrome://browser/skin/caption-buttons.svg#minimize);
-      }
-
-      #titlebar-max {
-        list-style-image: url(chrome://browser/skin/caption-buttons.svg#maximize);
-      }
-
-      #main-window[sizemode="maximized"] #titlebar-max {
-        list-style-image: url(chrome://browser/skin/caption-buttons.svg#restore);
-      }
-
-      #titlebar-close {
-        list-style-image: url(chrome://browser/skin/caption-buttons.svg#close);
-      }
-      
-      .titlebar-button:hover {
-        background-color: hsla(0, 0%, 0%, .17);
-      }
-
-      .titlebar-button:hover:active {
-        background-color: hsla(0, 0%, 0%, .27);
-        transition: none;
-      }
-      
-      @media (-moz-windows-accent-color-is-dark) {
-        /* dark accent color */
-        #titlebar-min {
-          list-style-image: url(chrome://browser/skin/caption-buttons.svg#minimize-highlight);
-        }
-
-        #titlebar-max {
-          list-style-image: url(chrome://browser/skin/caption-buttons.svg#maximize-highlight);
-        }
-
-        #main-window[sizemode="maximized"] #titlebar-max {
-          list-style-image: url(chrome://browser/skin/caption-buttons.svg#restore-highlight);
-        }
-
-        #titlebar-close {
-          list-style-image: url(chrome://browser/skin/caption-buttons.svg#close-highlight);
-        }
-      
-        .titlebar-button:not(#titlebar-close):not(:-moz-window-inactive):not(:-moz-lwtheme):hover {
-          background-color: hsla(0, 0%, 100%, .17);
-        }
-        .titlebar-button:not(#titlebar-close):not(:-moz-window-inactive):not(:-moz-lwtheme):hover:active	{
-          background-color: hsla(0, 0%, 100%, .27);
-          transition: none;
-        }
-      
-        #titlebar-close:not(:-moz-window-inactive):not(:-moz-lwtheme):hover {
-          background-color: hsla(0, 86%, 49%, 1);
-        }
-
-        #titlebar-close:not(:-moz-window-inactive):not(:-moz-lwtheme):hover:active	{
-          background-color: hsla(0, 60%, 39%, 1);
-          transition: none;
-        }
-      }
-    } /* Windows 10 accent color applies */
-
-    @media not all and (-moz-windows-default-theme) {
-      #main-window {
-        background-color: transparent;
-      }
-    }
-
-    #titlebar-buttonbox,
-    .titlebar-button {
-      -moz-appearance: none !important;
-    }
-
-    .titlebar-button {
-      border: none;
-      margin: 0 !important;
-      padding: 9px 17px;
-      transition: background-color linear 120ms;
-    }
-        
-    #main-window[sizemode="maximized"][tabsontop=true] #tabbrowser-tabs {
-      min-height: 28px;
-    }
-
-    #main-window[sizemode=maximized] .titlebar-button {
-      padding-top: 8px;
-      padding-bottom: 8px;
-    }
-
-    .titlebar-button > .toolbarbutton-icon {
-      width: 12px;
-      height: 12px;
-    }
-
-    .titlebar-button:not(:hover) > .toolbarbutton-icon:-moz-window-inactive {
-      opacity: 0.5;
-    }
-
-    #main-window[chromemargin^="0,"][sizemode=normal] #navigator-toolbox {
-      margin-top: -4px;
-    }
-
-    #main-window[sizemode="maximized"] #titlebar-close {
-      padding-right: 19px;
-    }
-    
-    #titlebar-close:hover {
-      list-style-image: url(chrome://browser/skin/caption-buttons.svg#close-highlight);
-      background-color: hsla(0, 86%, 49%, 1);
-    }
-
-    #titlebar-close:hover:active {
-      background-color: hsla(0, 86%, 49%, 0.6);
-      transition: none;
-    }
-    
-    /* inactive window */
-
-    #titlebar-min:-moz-window-inactive:not(:-moz-lwtheme) {
-      list-style-image: url(chrome://browser/skin/caption-buttons.svg#minimize);
-    }
-
-    #titlebar-max:-moz-window-inactive:not(:-moz-lwtheme) {
-      list-style-image: url(chrome://browser/skin/caption-buttons.svg#maximize);
-    }
-
-    #main-window[sizemode="maximized"] #titlebar-max:-moz-window-inactive:not(:-moz-lwtheme) {
-      list-style-image: url(chrome://browser/skin/caption-buttons.svg#restore);
-    }
-
-    #titlebar-close:-moz-window-inactive:not(:-moz-lwtheme):not(:hover) {
-      list-style-image: url(chrome://browser/skin/caption-buttons.svg#close);
-    }
-    
-    .titlebar-button:-moz-window-inactive:not(:-moz-lwtheme):hover {
-      background-color: hsla(0, 0%, 0%, .17);
-    }
-
-    .titlebar-button:-moz-window-inactive:not(:-moz-lwtheme):hover:active {
-      background-color: hsla(0, 0%, 0%, .27);
-      transition: none;
-    }
-    
-    /* light persona */
-    
-    .titlebar-button:-moz-lwtheme-darktext:hover {
-      background-color: hsla(0, 0%, 0%, .17);
-    }
-
-   .titlebar-button:-moz-lwtheme-darktext:hover:active {
-      background-color: hsla(0, 0%, 0%, .27);
-      transition: none;
-    }
-    
-    #titlebar-min:-moz-lwtheme-darktext {
-      list-style-image: url(chrome://browser/skin/caption-buttons.svg#minimize-outline);
-    }
-
-    #titlebar-max:-moz-lwtheme-darktext {
-      list-style-image: url(chrome://browser/skin/caption-buttons.svg#maximize-outline);
-    }
-
-    #main-window[sizemode="maximized"]:-moz-lwtheme-darktext #titlebar-max:-moz-lwtheme-darktext {
-      list-style-image: url(chrome://browser/skin/caption-buttons.svg#restore-outline);
-    }
-
-    #titlebar-close:-moz-lwtheme-darktext {
-      list-style-image: url(chrome://browser/skin/caption-buttons.svg#close-outline);
-    }
-    #titlebar-close:hover:-moz-lwtheme-darktext {
-      list-style-image: url(chrome://browser/skin/caption-buttons.svg#close-outline);
-    }
-        
-    /* dark persona */
-    
-    .titlebar-button:-moz-lwtheme-brighttext:hover {
-      background-color: hsla(0, 0%, 100%, .27);
-    }
-
-    .titlebar-button:-moz-lwtheme-brighttext:hover:active {
-      background-color: hsla(0, 0%, 100%, .37);
-      transition: none;
-    }
-    
-    #titlebar-min:-moz-lwtheme-brighttext {
-      list-style-image: url(chrome://browser/skin/caption-buttons.svg#minimize-outline-inverted);
-    }
-
-    #titlebar-max:-moz-lwtheme-brighttext {
-      list-style-image: url(chrome://browser/skin/caption-buttons.svg#maximize-outline-inverted);
-    }
-
-    #main-window[sizemode="maximized"]:-moz-lwtheme-brighttext #titlebar-max:-moz-lwtheme-brighttext {
-      list-style-image: url(chrome://browser/skin/caption-buttons.svg#restore-outline-inverted);
-    }
-
-    #titlebar-close:-moz-lwtheme-brighttext {
-      list-style-image: url(chrome://browser/skin/caption-buttons.svg#close-outline-inverted);
-    }
-    #titlebar-close:hover:-moz-lwtheme-brighttext {
-      list-style-image: url(chrome://browser/skin/caption-buttons.svg#close-outline-inverted);
-    }
-
-    /* the 12px image renders a 10px icon, and the 10px upscaled gets rounded to 12.5, which
-     * rounds up to 13px, which makes the icon one pixel too big on 1.25dppx. Fix: */
-    @media (min-resolution: 1.20dppx) and (max-resolution: 1.45dppx) {
-      .titlebar-button > .toolbarbutton-icon {
-        width: 11.5px;
-        height: 11.5px;
-      }
-    }
-     
-    /* 175% dpi should result in the same device pixel sizes as 150% dpi. */
-    @media (min-resolution: 1.70dppx) and (max-resolution: 1.95dppx) {
-      .titlebar-button {
-        padding-left: 14.1px;
-        padding-right: 14.1px;
-      }
-      .titlebar-button > .toolbarbutton-icon {
-        width: 10.8px;
-        height: 10.8px;
-      }
-    }
-
-    /* 225% dpi should result in the same device pixel sizes as 200% dpi. */
-    @media (min-resolution: 2.20dppx) and (max-resolution: 2.45dppx) {
-      .titlebar-button {
-        padding-left: 15.3333px;
-        padding-right: 15.3333px;
-      }
-      .titlebar-button > .toolbarbutton-icon {
-        width: 10.8px;
-        height: 10.8px;
-      }
-    }
-
-    /* 275% dpi should result in the same device pixel sizes as 250% dpi. */
-    @media (min-resolution: 2.70dppx) and (max-resolution: 2.95dppx) {
-      /* NB: todo: this should also change padding on the buttons
-       * themselves, but without a device to test this on, it's
-       * impossible to know by how much. */
-      .titlebar-button > .toolbarbutton-icon {
-        width: 10.8px;
-        height: 10.8px;
-      }
-    }
-    
-     
-    @media not all and (-moz-windows-default-theme) {
-      .titlebar-button {
-        background-color: -moz-field;
-      }
-      .titlebar-button:hover {
-        background-color: Highlight;
-      }
-
-      #titlebar-min {
-        list-style-image: url(chrome://browser/skin/caption-buttons.svg#minimize-outine-inverted);
-      }
-
-      #titlebar-max {
-        list-style-image: url(chrome://browser/skin/caption-buttons.svg#maximize-outine-inverted);
-      }
-
-      #main-window[sizemode="maximized"] #titlebar-max {
-        list-style-image: url(chrome://browser/skin/caption-buttons.svg#restore-outine-inverted);
-      }
-
-      #titlebar-close {
-        list-style-image: url(chrome://browser/skin/caption-buttons.svg#close-outine-inverted);
-      }
-      #titlebar-close:hover {
-        list-style-image: url(chrome://browser/skin/caption-buttons.svg#close-outine-inverted);
-      }
-    }
-  } /* Win 10 styling */
-
-  @media (-moz-os-version: windows-win7),
-         (-moz-os-version: windows-win8) {
-    #main-window[sizemode="maximized"] #titlebar-buttonbox {
-      margin-inline-end: 3px;
-    }
-
-    #main-window {
-      background-color: transparent;
-      -moz-appearance: -moz-win-borderless-glass;
-    }
-
-    /* These should be hidden w/ glass enabled. Windows draws its own buttons. */
-    .titlebar-button {
-      display: none;
-    }
-
-    /* The borders on the glass frame are ours, and inside #browser, and on
-     * win7 we want to make sure they are "glassy", so we can't use
-     * #browser as the exclude-glass container. We use #appcontent instead. */
-    #browser {
-      -moz-appearance: none;
-    }
-
-    #appcontent {
-      -moz-appearance: -moz-win-exclude-glass;
-    }
-  }
-
-  @media (-moz-os-version: windows-win8) {
-    /* Artificially draw window borders that are covered by lwtheme, see bug 591930.
-     * Borders for win7 are below, win10 doesn't need them. */
-    #main-window[sizemode="normal"] > #tab-view-deck > #browser-panel:-moz-lwtheme {
-      border-top: 1px solid @toolbarShadowColor@;
-    }
-  }
-
-  @media (-moz-windows-default-theme) {
-    #main-menubar > menu:not(:-moz-lwtheme) {
-      color: inherit;
-    }
-
-    /* Use a different color only on Windows 8 and higher for inactive windows.
-     * On aero, the menubar fog disappears for inactive windows, and renders gray
-     * illegible.
-     */
-    @media not all and (-moz-os-version: windows-win7) {
-      #toolbar-menubar:not(:-moz-lwtheme):-moz-window-inactive {
-        color: ThreeDShadow;
-      }
-    }
-  }
-
-  #main-window[darkwindowframe="true"] #toolbar-menubar:not(:-moz-lwtheme):not(:-moz-window-inactive),
-  #main-window[darkwindowframe="true"] #TabsToolbar:not(:-moz-lwtheme):not(:-moz-window-inactive) {
-    color: white;
-  }
-
-  /* Show borders on win7 and win8, but not on win10 and later: */
-  @media (-moz-os-version: windows-win7),
-         (-moz-os-version: windows-win8) {
-    /* Vertical toolbar border */
-    #main-window:not([customizing])[sizemode=normal] #navigator-toolbox > toolbar:not(#toolbar-menubar):not(#TabsToolbar):not(:-moz-lwtheme),
-    #main-window:not([customizing])[sizemode=normal] #navigator-toolbox:-moz-lwtheme,
-    #main-window[customizing] #navigator-toolbox > toolbar:not(#toolbar-menubar):not(#TabsToolbar) {
-      border-left: 1px solid @toolbarShadowColor@;
-      border-right: 1px solid @toolbarShadowColor@;
-      background-clip: padding-box;
-    }
-
-    #main-window:not([customizing])[sizemode=normal] #navigator-toolbox:not(:-moz-lwtheme)::after,
-    #main-window[customizing] #navigator-toolbox::after {
-      box-shadow: 1px 0 0 @toolbarShadowColor@, -1px 0 0 @toolbarShadowColor@;
-      margin-left: 1px;
-      margin-right: 1px;
-    }
-
-    #main-window[sizemode=normal] #browser-border-start,
-    #main-window[sizemode=normal] #browser-border-end {
-      display: -moz-box;
-      background-color: @toolbarShadowColor@;
-      width: 1px;
-    }
-
-    #main-window[sizemode=normal] #browser-bottombox {
-      border: 1px solid @toolbarShadowColor@;
-      border-top-style: none;
-      background-clip: padding-box;
-    }
-  }
-
-  #main-window[sizemode=normal] #TabsToolbar {
-    padding-left: 1px;
-    padding-right: 1px;
-  }
-
-  #appcontent:not(:-moz-lwtheme) {
-    background-color: -moz-dialog;
-  }
-}
-
-@media (-moz-windows-glass) {
-  #main-window[sizemode=normal] #nav-bar {
-    border-top-left-radius: 2.5px;
-    border-top-right-radius: 2.5px;
-  }
-
-  #main-window[sizemode=fullscreen]:not(:-moz-lwtheme) {
-    -moz-appearance: none;
-    background-color: #556;
-  }
-
-  #toolbar-menubar:not(:-moz-lwtheme) {
-    text-shadow: 0 0 .5em white, 0 0 .5em white, 0 1px 0 rgba(255,255,255,.4);
-  }
-
-  #main-menubar:not(:-moz-lwtheme):not(:-moz-window-inactive) {
-    background-color: rgba(255,255,255,.5);
-    color: black;
-    border-radius: 4px;
-  }
-
-  /* Artificially draw window borders that are covered by lwtheme, see bug 591930.
-   * We use a different border for win8, and this is not necessary on win10+ */
-  #main-window[sizemode="normal"] > #tab-view-deck > #browser-panel:-moz-lwtheme {
-    border-top: 2px solid;
-    -moz-border-top-colors: @glassActiveBorderColor@ rgba(255,255,255,.6);
-  }
-
-  #main-window[sizemode="normal"] > #tab-view-deck > #browser-panel:-moz-lwtheme:-moz-window-inactive {
-    -moz-border-top-colors: @glassInactiveBorderColor@ rgba(255,255,255,.6);
-  }
-
-  /* Glass Fog */
-
-  #TabsToolbar:not(:-moz-lwtheme) {
-    position: relative;
-  }
-
-  #TabsToolbar:not(:-moz-lwtheme)::after {
-    /* Because we use placeholders for window controls etc. in the tabstrip,
-     * and position those with ordinal attributes, and because our layout code
-     * expects :before/:after nodes to come first/last in the frame list,
-     * we have to reorder this element to come last, hence the
-     * ordinal group value (see bug 853415). */
-    -moz-box-ordinal-group: 1001;
-    box-shadow: 0 0 30px 30px rgba(174,189,204,0.85);
-    content: "";
-    display: -moz-box;
-    height: 0;
-    margin: 0 60px; /* (30px + 30px) from box-shadow */
-    position: absolute;
-    pointer-events: none;
-    top: 50%;
-    width: -moz-available;
-    z-index: -1;
-  }
-
-  /* Need to constrain the glass fog to avoid overlapping layers, see bug 886281. */
-  #navigator-toolbox:not(:-moz-lwtheme) {
-    overflow: -moz-hidden-unscrollable;
-  }
-
-  #main-window[sizemode=normal] .tabbrowser-arrowscrollbox > .arrowscrollbox-scrollbox > .scrollbox-innerbox:not(:-moz-lwtheme) {
-    position: relative;
-  }
-
-  /* End Glass Fog */
-}
-
-/* Aero Basic */
-@media not all and (-moz-windows-compositor) {
-  @media (-moz-windows-default-theme) {
-    #main-window {
-      background-color: rgb(185,209,234);
-    }
-    #main-window:-moz-window-inactive {
-      background-color: rgb(215,228,242);
-    }
-
-    /* Render a window top border for lwthemes: */
-    #main-window[tabsintitlebar][sizemode="normal"] > #tab-view-deck > #browser-panel:-moz-lwtheme {
-      background-image: linear-gradient(to bottom,
-            @glassActiveBorderColor@ 0, @glassActiveBorderColor@ 1px,
-            rgba(255,255,255,.6) 1px, rgba(255,255,255,.6) 2px, transparent 2px);
-    }
-
-    #main-window[tabsintitlebar][sizemode="normal"] > #tab-view-deck > #browser-panel:-moz-lwtheme:-moz-window-inactive {
-      background-image: linear-gradient(to bottom,
-            @glassInactiveBorderColor@ 0, @glassInactiveBorderColor@ 1px,
-            rgba(255,255,255,.6) 1px, rgba(255,255,255,.6) 2px, transparent 2px);
-    }
-  }
-
-  #print-preview-toolbar:not(:-moz-lwtheme) {
-    -moz-appearance: -moz-win-browsertabbar-toolbox;
-  }
-}
diff --git a/browser/themes/windows/browser-lightweightTheme.css b/browser/themes/windows/browser-lightweightTheme.css
deleted file mode 100644
index d2a1b840c..000000000
--- a/browser/themes/windows/browser-lightweightTheme.css
+++ /dev/null
@@ -1,39 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-%include windowsShared.inc
-%filter substitution
-
-/*
- * LightweightThemeListener will append the current lightweight theme's header
- * image to the background-image for each of the following rulesets.
- */
-
-/* Lightweight theme on tabs */
-#tabbrowser-tabs:not([movingtab]) > .tabbrowser-tab > .tab-stack > .tab-background > .tab-background-start[selected=true]:-moz-lwtheme::before,
-#tabbrowser-tabs:not([movingtab]) > .tabbrowser-tab > .tab-stack > .tab-background > .tab-background-end[selected=true]:-moz-lwtheme::before {
-  background-attachment: scroll, fixed;
-  background-color: transparent;
-  background-image: @fgTabTextureLWT@;/*, lwtHeader;*/
-  background-position: 0 0, right top;
-  background-repeat: repeat-x, no-repeat;
-}
-
-#tabbrowser-tabs:not([movingtab]) > .tabbrowser-tab > .tab-stack > .tab-background > .tab-background-middle[selected=true]:-moz-lwtheme {
-  background-attachment: scroll, scroll, fixed;
-  background-color: transparent;
-  background-image: url(chrome://browser/skin/tabbrowser/tab-active-middle.png),
-                    @fgTabTextureLWT@;/*,
-                    lwtHeader;*/
-  background-position: 0 0, 0 0, right top;
-  background-repeat: repeat-x, repeat-x, no-repeat;
-}
-
-@media (min-resolution: 1.25dppx) {
-  #tabbrowser-tabs:not([movingtab]) > .tabbrowser-tab > .tab-stack > .tab-background > .tab-background-middle[selected=true]:-moz-lwtheme {
-    background-image: url(chrome://browser/skin/tabbrowser/tab-active-middle@2x.png),
-                      @fgTabTextureLWT@;/*,
-                      lwtHeader;*/
-  }
-}
diff --git a/browser/themes/windows/browser.css b/browser/themes/windows/browser.css
deleted file mode 100644
index 47584a654..000000000
--- a/browser/themes/windows/browser.css
+++ /dev/null
@@ -1,2496 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-@import url("chrome://global/skin/");
-
-@namespace url("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul");
-@namespace html url("http://www.w3.org/1999/xhtml");
-@namespace svg url("http://www.w3.org/2000/svg");
-
-%include ../shared/browser.inc
-%include windowsShared.inc
-%filter substitution
-%define toolbarShadowColor hsla(209,67%,12%,0.35)
-%define forwardTransitionLength 150ms
-%define conditionalForwardWithUrlbar window:not([chromehidden~="toolbar"]) #urlbar-wrapper
-
-:root {
-  --titlebar-text-color: currentColor;
-
-  --space-above-tabbar: 15px;
-
-  --backbutton-urlbar-overlap: 6px;
-
-  /* icon width + border + horizontal padding (without the overlap from backbutton-urlbar-overlap) */
-  --forwardbutton-width: 25px;
-
-  --toolbarbutton-vertical-inner-padding: 2px;
-  --toolbarbutton-vertical-outer-padding: 8px;
-
-  --toolbarbutton-hover-background: rgba(0,0,0,.1);
-  --toolbarbutton-hover-bordercolor: rgba(0,0,0,.2);
-  --toolbarbutton-hover-boxshadow: none;
-
-  --toolbarbutton-active-background: rgba(0,0,0,.15);
-  --toolbarbutton-active-bordercolor: rgba(0,0,0,.3);
-  --toolbarbutton-active-boxshadow: 0 0 0 1px rgba(0,0,0,.15) inset;
-
-  --toolbarbutton-checkedhover-backgroundcolor: rgba(0,0,0,.1);
-
-  --urlbar-dropmarker-url: url("chrome://browser/skin/urlbar-history-dropmarker.png");
-  --urlbar-dropmarker-region: rect(0px, 11px, 14px, 0px);
-  --urlbar-dropmarker-hover-region: rect(0px, 22px, 14px, 11px);
-  --urlbar-dropmarker-active-region: rect(0px, 33px, 14px, 22px);
-  --urlbar-dropmarker-2x-url: url("chrome://browser/skin/urlbar-history-dropmarker@2x.png");
-  --urlbar-dropmarker-2x-region: rect(0, 22px, 28px, 0);
-  --urlbar-dropmarker-hover-2x-region: rect(0, 44px, 28px, 22px);
-  --urlbar-dropmarker-active-2x-region: rect(0, 66px, 28px, 44px);
-
-  --panel-separator-color: ThreeDLightShadow;
-  --arrowpanel-dimmed: hsla(0,0%,80%,.3);
-  --arrowpanel-dimmed-further: hsla(0,0%,80%,.45);
-  --arrowpanel-dimmed-even-further: hsla(0,0%,80%,.8);
-
-  --urlbar-separator-color: ThreeDLightShadow;
-}
-
-@media (-moz-windows-default-theme) {
-  :root {
-    --panel-separator-color: hsla(210,4%,10%,.14);
-  }
-}
-
-toolbar[brighttext] {
-  --toolbarbutton-hover-background: rgba(255,255,255,.25);
-  --toolbarbutton-hover-bordercolor: rgba(255,255,255,.5);
-
-  --toolbarbutton-active-background: rgba(255,255,255,.4);
-  --toolbarbutton-active-bordercolor: rgba(255,255,255,.7);
-  --toolbarbutton-active-boxshadow: 0 0 0 1px rgba(255,255,255,.4) inset;
-
-  --toolbarbutton-checkedhover-backgroundcolor: rgba(255,255,255,.3);
-}
-
-toolbar:-moz-lwtheme {
-  --toolbarbutton-hover-background: rgba(255,255,255,.25);
-  --toolbarbutton-hover-bordercolor: rgba(0,0,0,.2);
-
-  --toolbarbutton-active-background: rgba(70%,70%,70%,.25);
-  --toolbarbutton-active-bordercolor: rgba(0,0,0,.3);
-  --toolbarbutton-active-boxshadow: 0 0 2px rgba(0,0,0,.6) inset;
-
-  --toolbarbutton-checkedhover-backgroundcolor: rgba(85%,85%,85%,.25);
-}
-
-#menubar-items {
-  -moz-box-orient: vertical; /* for flex hack */
-}
-
-#main-menubar {
-  -moz-box-flex: 1; /* make menu items expand to fill toolbar height */
-}
-
-/* Hides the titlebar-placeholder underneath the window caption buttons when we
-   are not autohiding the menubar. */
-#toolbar-menubar:not([autohide="true"]) + #TabsToolbar > .titlebar-placeholder[type="caption-buttons"] {
-  display: none;
-}
-
-/* We want a 4px gap between the TabsToolbar and the toolbar-menubar when the
-   toolbar-menu is displayed, and a 16px gap when it is not. 1px is taken care
-   of by the (light) outer shadow of the tab, the remaining 3/15 are these margins. */
-#toolbar-menubar:not([autohide=true]) ~ #TabsToolbar:not([inFullscreen]),
-#toolbar-menubar[autohide=true]:not([inactive]) ~ #TabsToolbar:not([inFullscreen]) {
-  margin-top: 3px;
-}
-
-#main-window[tabsintitlebar][sizemode="normal"]:not([inFullscreen])[chromehidden~="menubar"] #toolbar-menubar ~ #TabsToolbar,
-#main-window[tabsintitlebar][sizemode="normal"]:not([inFullscreen]) #toolbar-menubar[autohide="true"][inactive] ~ #TabsToolbar {
-  margin-top: var(--space-above-tabbar);
-}
-
-#main-window[customize-entered][tabsintitlebar]:not([inFullscreen]) #toolbar-menubar[customizing-dragovertarget].customization-target::before,
-#main-window[customize-entered][tabsintitlebar]:not([inFullscreen]) #TabsToolbar[customizing-dragovertarget].customization-target::before,
-#main-window[customize-entered][tabsintitlebar]:not([inFullscreen]) #toolbar-menubar.customization-target:hover::before,
-#main-window[customize-entered][tabsintitlebar]:not([inFullscreen]) #TabsToolbar.customization-target:hover::before {
-  outline-color: CaptionText;
-}
-
-#navigator-toolbox {
-  -moz-appearance: none;
-  background-color: transparent;
-  border-top: none;
-}
-
-#navigator-toolbox::after {
-  content: "";
-  display: -moz-box;
-  -moz-box-ordinal-group: 101; /* tabs toolbar is 100 */
-  border-bottom: 1px solid ThreeDShadow;
-}
-
-@media (-moz-windows-default-theme) {
-  @media (-moz-os-version: windows-win7) {
-    #navigator-toolbox::after {
-      border-bottom-color: #aabccf;
-    }
-  }
-
-  @media (-moz-os-version: windows-win8),
-         (-moz-os-version: windows-win10) {
-    #navigator-toolbox::after {
-      border-bottom-color: #c2c2c2;
-    }
-  }
-}
-
-#navigator-toolbox:-moz-lwtheme::after {
-  border-bottom-color: rgba(0,0,0,.3);
-}
-
-#navigator-toolbox > toolbar {
-  -moz-appearance: none;
-  border-style: none;
-}
-
-#navigator-toolbox > toolbar:not(#toolbar-menubar):not(#TabsToolbar) {
-  background-clip: padding-box;
-  background-image: linear-gradient(@toolbarHighlight@, @toolbarHighlight@);
-}
-
-@media (-moz-os-version: windows-win7) {
-  #nav-bar {
-    background-image: linear-gradient(@toolbarHighlight@, transparent) !important;
-  }
-
-  #navigator-toolbox > toolbar:not(#toolbar-menubar):not(#TabsToolbar):not(#nav-bar) {
-    background-image: none;
-  }
-}
-
-#navigator-toolbox > toolbar:not(#toolbar-menubar):not(#TabsToolbar):not(:-moz-lwtheme) {
-  background-color: -moz-Dialog;
-}
-
-#navigator-toolbox > toolbar:not(#toolbar-menubar):not(#TabsToolbar):not(#nav-bar):not(#addon-bar) {
-  overflow: -moz-hidden-unscrollable;
-  max-height: 4em;
-  transition: min-height 170ms ease-out, max-height 170ms ease-out;
-  padding: 0 5px;
-}
-
-#navigator-toolbox > toolbar:not(#toolbar-menubar):not(#TabsToolbar):not(#nav-bar):not(#addon-bar)[collapsed=true] {
-  min-height: 0.1px;
-  max-height: 0;
-  transition: min-height 170ms ease-out, max-height 170ms ease-out, visibility 170ms linear;
-}
-
-#toolbar-menubar,
-#TabsToolbar {
-  color: var(--titlebar-text-color);
-}
-
-@media not all and (-moz-windows-compositor),
-       not all and (-moz-windows-default-theme) {
-  /* Please keep the menu text colors in this media block in sync with
-   * devedition.css, minus the :not(:-moz-lwtheme) condition - see Bug 1165718.
-   */
-  :root[tabsintitlebar]:not([inFullscreen]):not(:-moz-lwtheme) {
-    --titlebar-text-color: CaptionText;
-  }
-
-  :root[tabsintitlebar]:not([inFullscreen]):not(:-moz-lwtheme):-moz-window-inactive {
-    --titlebar-text-color: InactiveCaptionText;
-  }
-}
-
-@media not all and (-moz-windows-compositor) {
-  #main-window[tabsintitlebar] #titlebar:-moz-lwtheme {
-    visibility: hidden;
-  }
-
-  #main-window[tabsintitlebar] #titlebar-content:-moz-lwtheme {
-    -moz-binding: url("chrome://global/content/bindings/general.xml#windowdragbox");
-    visibility: visible;
-  }
-
-  /* Top-level menu appearance has transparent background, so the text color
-     needs to be inherited from our custom menubar too. */
-  #main-window[tabsintitlebar] #main-menubar > menu:not(:-moz-lwtheme) {
-    color: inherit;
-  }
-}
-
-/**
- * In the classic themes, the titlebar has a horizontal gradient, which is
- * problematic for reading the text of background tabs when they're in the
- * titlebar. We side-step this issue by layering our own background underneath
- * the tabs. Unfortunately, this requires a bunch of positioning in order to get
- * text and icons to not appear fuzzy.
- */
-@media (-moz-windows-classic) {
-  /**
-   * We need to bump up the z-index of the tabbrowser-tabs so that they appear
-   * over top of the fog we're applying for classic themes, as well as the nav-bar.
-   */
-  #main-window[tabsintitlebar]:not([sizemode=fullscreen]) #tabbrowser-tabs {
-    position: relative;
-    z-index: 2;
-  }
-
-  #main-window[tabsintitlebar] #TabsToolbar:not(:-moz-lwtheme) {
-    position: relative;
-  }
-
-  #main-window[tabsintitlebar]:not([sizemode=fullscreen]) #TabsToolbar:not(:-moz-lwtheme)::after {
-    /* Because we use placeholders for window controls etc. in the tabstrip,
-     * and position those with ordinal attributes, and because our layout code
-     * expects :before/:after nodes to come first/last in the frame list,
-     * we have to reorder this element to come last, hence the
-     * ordinal group value (see bug 853415). */
-    -moz-box-ordinal-group: 1001;
-    box-shadow: 0 0 50px 8px ActiveCaption;
-    content: "";
-    display: -moz-box;
-    height: 0;
-    margin: 0 50px;
-    position: absolute;
-    pointer-events: none;
-    top: 100%;
-    width: -moz-available;
-  }
-
-  #main-window[tabsintitlebar]:not([sizemode=fullscreen]) #TabsToolbar:not(:-moz-lwtheme):-moz-window-inactive::after {
-    box-shadow: 0 0 50px 8px InactiveCaption;
-  }
-
-  #main-window[tabsintitlebar]:not([sizemode=fullscreen]) toolbar[customindex]:not(:-moz-lwtheme),
-  #main-window[tabsintitlebar]:not([sizemode=fullscreen]) #PersonalToolbar:not(:-moz-lwtheme) {
-    position: relative;
-  }
-
-  /* Need to constrain the box shadow fade to avoid overlapping layers, see bug 886281. */
-  #main-window[tabsintitlebar]:not([sizemode=fullscreen]) #navigator-toolbox:not(:-moz-lwtheme) {
-    overflow: -moz-hidden-unscrollable;
-  }
-
-  /**
-   * When the tabstrip is overflowed, pinned tab separators get position: absolute,
-   * which makes the pinned tab separators leak over the nav-bar highlight. Forcing
-   * the element to snap to the bottom of the client rect works around the issue.
-   */
-  #main-window[tabsintitlebar] #tabbrowser-tabs[positionpinnedtabs] > .tabbrowser-tab[pinned]::before {
-    bottom: 0px;
-  }
-
-  #main-window[tabsintitlebar]:not([sizemode=fullscreen]) #TabsToolbar .toolbarbutton-1 {
-    position: relative;
-    z-index: 1;
-  }
-
-  /**
-   * With the tabbrowser-tabs element z-index'd above the nav-bar, we now get the
-   * scrollbox button borders leaking over the nav-bar highlight. This transparent bottom
-   * border forces the scrollbox button borders to terminate a pixel early, working
-   * around the issue.
-   */
-  #main-window[tabsintitlebar]:not([sizemode=fullscreen]) .tabbrowser-arrowscrollbox > .scrollbutton-up,
-  #main-window[tabsintitlebar]:not([sizemode=fullscreen]) .tabbrowser-arrowscrollbox > .scrollbutton-down {
-    border-bottom: 1px solid transparent;
-  }
-
-  #main-window[tabsintitlebar][sizemode="normal"] > #tab-view-deck > #browser-panel:-moz-lwtheme {
-    /* Render a window top border: */
-    background-image: linear-gradient(to bottom,
-          ThreeDLightShadow 0, ThreeDLightShadow 1px,
-          ThreeDHighlight 1px, ThreeDHighlight 2px,
-          ActiveBorder 2px, ActiveBorder 4px, transparent 4px);
-  }
-
-  /* End classic titlebar gradient */
-
-  #main-window[tabsintitlebar]:not([inFullscreen]) :-moz-any(#TabsToolbar, #toolbar-menubar) toolbarbutton:not(:-moz-lwtheme) {
-    color: inherit;
-  }
-}
-
-#TabsToolbar:not([collapsed="true"]) + #nav-bar {
-  /* Move up into the TabsToolbar for the inner highlight at the top of the nav-bar */
-  margin-top: calc(-1 * var(--navbar-tab-toolbar-highlight-overlap));
-  /* Position the toolbar above the bottom of background tabs */
-  position: relative;
-  z-index: 1;
-}
-
-#nav-bar {
-  border-top: 1px solid @toolbarShadowColor@ !important;
-  box-shadow: 0 1px 0 @toolbarHighlight@ inset;
-}
-@media not all and (-moz-windows-compositor) {
-  #TabsToolbar[collapsed="true"] + #nav-bar {
-    border-top-style: none !important;
-  }
-}
-
-#personal-bookmarks {
-  min-height: 24px;
-}
-
-#print-preview-toolbar:not(:-moz-lwtheme) {
-  -moz-appearance: toolbox;
-}
-
-#browser-bottombox:not(:-moz-lwtheme) {
-  background-color: -moz-dialog;
-}
-
-/* ::::: titlebar ::::: */
-
-#main-window[sizemode="normal"] > #titlebar {
-  -moz-appearance: -moz-window-titlebar;
-}
-
-#main-window[sizemode="maximized"] > #titlebar {
-  -moz-appearance: -moz-window-titlebar-maximized;
-}
-
-@media (-moz-windows-classic) {
-  #main-window[tabsintitlebar][sizemode="normal"] > #tab-view-deck > #browser-panel > #navigator-toolbox > #toolbar-menubar {
-    margin-top: 4px;
-  }
-}
-
-/* The button box must appear on top of the navigator-toolbox in order for
- * click and hover mouse events to work properly for the button in the restored
- * window state. Otherwise, elements in the navigator-toolbox, like the menubar,
- * can swallow those events. It will also place the buttons above the fog on
- * Windows 7 with Aero Glass.
- */
-#titlebar-buttonbox {
-  z-index: 1;
-}
-
-.titlebar-placeholder[type="caption-buttons"] {
-  margin-left: 22px; /* space needed for Aero Snap */
-}
-
-/* titlebar command buttons */
-
-#titlebar-min {
-  -moz-appearance: -moz-window-button-minimize;
-}
-
-#titlebar-max {
-  -moz-appearance: -moz-window-button-maximize;
-}
-
-#main-window[sizemode="maximized"] #titlebar-max {
-  -moz-appearance: -moz-window-button-restore;
-}
-
-#titlebar-close {
-  -moz-appearance: -moz-window-button-close;
-}
-
-@media not all and (-moz-windows-classic) {
-  #titlebar-min {
-    margin-inline-end: 2px;
-  }
-}
-
-/* ::::: bookmark buttons ::::: */
-
-toolbarbutton.bookmark-item:not(.subviewbutton),
-#personal-bookmarks[cui-areatype="toolbar"]:not([overflowedItem=true]) > #bookmarks-toolbar-placeholder {
-  margin: 0;
-  padding: 2px 3px;
-  -moz-appearance: none;
-  border: 1px solid transparent;
-  border-radius: 1px;
-  background-origin: padding-box !important;
-  background-clip: padding-box !important;
-  transition-property: background-color, border-color, box-shadow;
-  transition-duration: 150ms;
-}
-
-toolbarbutton.bookmark-item:not(.subviewbutton):hover:not([disabled="true"]):not([open]) {
-  border-color: var(--toolbarbutton-hover-bordercolor);
-  background: var(--toolbarbutton-hover-background);
-}
-
-toolbarbutton.bookmark-item:not(.subviewbutton):hover:active:not([disabled="true"]),
-toolbarbutton.bookmark-item[open="true"] {
-  border-color: var(--toolbarbutton-active-bordercolor);
-  box-shadow: var(--toolbarbutton-active-boxshadow);
-  background: var(--toolbarbutton-active-background);
-}
-
-.bookmark-item > .toolbarbutton-icon,
-#personal-bookmarks[cui-areatype="toolbar"] > #bookmarks-toolbar-placeholder > .toolbarbutton-icon {
-  width: 16px;
-  height: 16px;
-}
-
-/* Force the display of the label for bookmarks */
-.bookmark-item > .toolbarbutton-text,
-#personal-bookmarks[cui-areatype="toolbar"] > #bookmarks-toolbar-placeholder > .toolbarbutton-text {
-  display: -moz-box !important;
-}
-
-.bookmark-item > .toolbarbutton-menu-dropmarker {
-  display: none;
-}
-
-#bookmarks-toolbar-placeholder {
-  list-style-image: url("chrome://browser/skin/places/bookmarksToolbar.png") !important;
-}
-
-toolbarpaletteitem[place="palette"] > #personal-bookmarks > #bookmarks-toolbar-placeholder,
-#personal-bookmarks[cui-areatype="menu-panel"] > #bookmarks-toolbar-placeholder {
-  list-style-image: url("chrome://browser/skin/places/bookmarksToolbar-menuPanel.png") !important;
-}
-
-/* ----- BOOKMARK STAR ANIMATION ----- */
-
-@keyframes animation-bookmarkAdded {
-  from { transform: rotate(0deg) translateX(-16px) rotate(0deg) scale(1); opacity: 0; }
-  60%  { transform: rotate(180deg) translateX(-16px) rotate(-180deg) scale(2.2); opacity: 1; }
-  80%  { opacity: 1; }
-  to   { transform: rotate(180deg) translateX(-16px) rotate(-180deg) scale(1); opacity: 0; }
-}
-
-@keyframes animation-bookmarkPulse {
-  from { transform: scale(1); }
-  50%  { transform: scale(1.3); }
-  to   { transform: scale(1); }
-}
-
-#bookmarked-notification-container {
-  min-height: 1px;
-  min-width: 1px;
-  height: 1px;
-  margin-bottom: -1px;
-  z-index: 5;
-  position: relative;
-}
-
-#bookmarked-notification {
-  background-size: 16px;
-  background-position: center;
-  background-repeat: no-repeat;
-  width: 16px;
-  height: 16px;
-  opacity: 0;
-}
-
-#bookmarked-notification-dropmarker-anchor {
-  z-index: -1;
-  position: relative;
-}
-
-#bookmarked-notification-dropmarker-icon {
-  width: 18px;
-  height: 18px;
-  visibility: hidden;
-}
-
-#bookmarked-notification-anchor[notification="finish"] > #bookmarked-notification {
-  background-image: url("chrome://browser/skin/places/bookmarks-notification-finish.png");
-  animation: animation-bookmarkAdded 800ms;
-  animation-timing-function: ease, ease, ease;
-}
-
-#bookmarks-menu-button[notification="finish"] > .toolbarbutton-menubutton-dropmarker > .dropmarker-icon {
-  list-style-image: none !important;
-}
-
-#bookmarked-notification-dropmarker-anchor[notification="finish"] > #bookmarked-notification-dropmarker-icon {
-  visibility: visible;
-  animation: animation-bookmarkPulse 300ms;
-  animation-delay: 600ms;
-  animation-timing-function: ease-out;
-}
-
-/* ::::: bookmark menus ::::: */
-
-menu.bookmark-item,
-menuitem.bookmark-item {
-  min-width: 0;
-  max-width: 32em;
-}
-
-.bookmark-item:not(.subviewbutton) > .menu-iconic-left {
-  margin-top: 0;
-  margin-bottom: 0;
-}
-
-.bookmark-item > .menu-iconic-left > .menu-iconic-icon {
-  padding-inline-start: 0px;
-}
-
-/* ::::: bookmark items ::::: */
-
-.bookmark-item  {
-  list-style-image: url("chrome://mozapps/skin/places/defaultFavicon.png");
-}
-
-.bookmark-item[container] {
-  list-style-image: url("chrome://global/skin/icons/folder-item.png");
-  -moz-image-region: rect(0px, 32px, 16px, 16px);
-}
-
-.bookmark-item[container][open] {
-  -moz-image-region: rect(16px, 32px, 32px, 16px);
-}
-
-.bookmark-item[container][livemark] {
-  list-style-image: url("chrome://browser/skin/livemark-folder.png");
-  -moz-image-region: auto;
-}
-
-.bookmark-item[container][livemark] .bookmark-item {
-  list-style-image: url("chrome://browser/skin/places/livemark-item.png");
-  -moz-image-region: rect(0px, 16px, 16px, 0px);
-}
-
-.bookmark-item[container][livemark] .bookmark-item[visited] {
-  -moz-image-region: rect(0px, 32px, 16px, 16px);
-}
-
-.bookmark-item[container][query] {
-  list-style-image: url("chrome://browser/skin/places/query.png");
-  -moz-image-region: auto;
-}
-
-.bookmark-item[query][tagContainer] {
-  list-style-image: url("chrome://browser/skin/places/tag.png");
-  -moz-image-region: auto;
-}
-
-.bookmark-item[query][dayContainer] {
-  list-style-image: url("chrome://browser/skin/places/calendar.png");
-  -moz-image-region: auto;
-}
-
-.bookmark-item[query][hostContainer] {
-  list-style-image: url("chrome://global/skin/icons/folder-item.png");
-  -moz-image-region: rect(0px, 32px, 16px, 16px);
-}
-
-.bookmark-item[query][hostContainer][open] {
-  list-style-image: url("chrome://global/skin/icons/folder-item.png");
-  -moz-image-region: rect(16px, 32px, 32px, 16px);
-}
-
-.bookmark-item[cutting] > .toolbarbutton-icon,
-.bookmark-item[cutting] > .menu-iconic-left > .menu-iconic-icon {
-  opacity: 0.5;
-}
-
-.bookmark-item[cutting] > .toolbarbutton-text,
-.bookmark-item[cutting] > .menu-iconic-left > .menu-iconic-text {
-  opacity: 0.7;
-}
-
-/* ::::: primary toolbar buttons ::::: */
-
-%include ../shared/toolbarbuttons.inc.css
-
-#main-window:not([customizing]) .toolbarbutton-1[disabled=true] > .toolbarbutton-icon,
-#main-window:not([customizing]) .toolbarbutton-1[disabled=true] > .toolbarbutton-menu-dropmarker,
-#main-window:not([customizing]) .toolbarbutton-1[disabled=true] > .toolbarbutton-menubutton-dropmarker,
-#main-window:not([customizing]) .toolbarbutton-1[disabled=true] > .toolbarbutton-menubutton-button > .toolbarbutton-icon,
-#main-window:not([customizing]) .toolbarbutton-1 > .toolbarbutton-menubutton-button[disabled=true] > .toolbarbutton-icon {
-  opacity: .4;
-}
-
-.toolbarbutton-1 > .toolbarbutton-menu-dropmarker,
-.toolbarbutton-1 > .toolbarbutton-menubutton-dropmarker {
-  list-style-image: url("chrome://browser/skin/toolbarbutton-dropdown-arrow.png");
-}
-
-toolbar[brighttext] .toolbarbutton-1 > .toolbarbutton-menu-dropmarker,
-toolbar[brighttext] .toolbarbutton-1 > .toolbarbutton-menubutton-dropmarker {
-  list-style-image: url("chrome://browser/skin/toolbarbutton-dropdown-arrow-inverted.png");
-}
-
-.toolbarbutton-1 > .toolbarbutton-icon,
-.toolbarbutton-1 > .toolbarbutton-menubutton-button > .toolbarbutton-icon {
-  margin-inline-end: 0;
-}
-
-:-moz-any(toolbar, .widget-overflow-list) .toolbarbutton-1 > .toolbarbutton-icon,
-:-moz-any(toolbar, .widget-overflow-list) .toolbarbutton-1 > :-moz-any(.toolbarbutton-menubutton-button, .toolbarbutton-badge-stack) > .toolbarbutton-icon {
-  max-width: 16px;
-}
-
-:-moz-any(toolbar, .widget-overflow-list) .toolbarbutton-1:-moz-any(@primaryToolbarButtons@, .toolbarbutton-legacy-addon) > .toolbarbutton-icon,
-:-moz-any(toolbar, .widget-overflow-list) .toolbarbutton-1:-moz-any(@primaryToolbarButtons@, .toolbarbutton-legacy-addon) > :-moz-any(.toolbarbutton-menubutton-button, .toolbarbutton-badge-stack) > .toolbarbutton-icon,
-#bookmarks-menu-button[cui-areatype="toolbar"] > .toolbarbutton-menubutton-dropmarker > .dropmarker-icon {
-  max-width: 18px;
-}
-
-%include ../shared/menupanel.inc.css
-
-.findbar-button,
-#nav-bar .toolbarbutton-1,
-#nav-bar .toolbarbutton-1 > .toolbarbutton-menubutton-button {
-  -moz-appearance: none;
-  border: none;
-  padding: 0;
-  background: none;
-}
-
-#nav-bar .toolbarbutton-1:not([type=menu-button]),
-#nav-bar .toolbarbutton-1 > .toolbarbutton-menubutton-button,
-#nav-bar .toolbarbutton-1 > .toolbarbutton-menubutton-dropmarker {
-  padding: var(--toolbarbutton-vertical-outer-padding) 2px;
-  -moz-box-pack: center;
-}
-
-#nav-bar #PanelUI-menu-button {
-  padding-inline-start: 5px;
-  padding-inline-end: 5px;
-}
-
-#nav-bar .toolbarbutton-1[type=panel],
-#nav-bar .toolbarbutton-1[type=menu]:not(#back-button):not(#forward-button):not(#feed-button):not(#PanelUI-menu-button) {
-  padding-left: 5px;
-  padding-right: 5px;
-}
-
-#nav-bar .toolbarbutton-1 > menupopup {
-  margin-top: -3px;
-}
-
-#nav-bar .toolbarbutton-1 > menupopup.cui-widget-panel {
-  margin-top: -8px;
-}
-
-#nav-bar .toolbarbutton-1 > .toolbarbutton-menubutton-button {
-  padding-inline-end: 0;
-}
-
-#nav-bar .toolbarbutton-1 > .toolbarbutton-menubutton-dropmarker {
-  padding-inline-start: 0;
-  -moz-box-align: center;
-}
-
-.findbar-button > .toolbarbutton-text,
-#nav-bar .toolbarbutton-1 > .toolbarbutton-icon,
-#nav-bar .toolbarbutton-1 > .toolbarbutton-text,
-#nav-bar .toolbarbutton-1 > .toolbarbutton-badge-stack,
-#nav-bar .toolbarbutton-1 > .toolbarbutton-menubutton-button > .toolbarbutton-icon,
-#nav-bar .toolbarbutton-1 > .toolbarbutton-menubutton-dropmarker > .dropmarker-icon,
-@conditionalForwardWithUrlbar@ > .toolbarbutton-1:-moz-any([disabled],:not([open]):not([disabled]):not(:active)) > .toolbarbutton-icon {
-  padding: var(--toolbarbutton-vertical-inner-padding) 6px;
-  background-origin: padding-box !important;
-  background-clip: padding-box !important;
-  border: 1px solid transparent;
-  border-radius: 1px;
-  transition-property: background-color, border-color, box-shadow;
-  transition-duration: 150ms;
-}
-
-#nav-bar .toolbarbutton-1 > .toolbarbutton-icon,
-#nav-bar .toolbarbutton-1 > .toolbarbutton-menubutton-button > .toolbarbutton-icon,
-#nav-bar #bookmarks-menu-button[cui-areatype="toolbar"] > .toolbarbutton-menubutton-dropmarker > .dropmarker-icon {
-  /* horizontal padding + border + actual icon width */
-  max-width: 32px;
-}
-
-@media (-moz-os-version: windows-win7) {
-  :root {
-    --toolbarbutton-hover-background: linear-gradient(hsla(0,0%,100%,.6), hsla(0,0%,100%,.1));
-    --toolbarbutton-hover-bordercolor: hsla(210,54%,20%,.15) hsla(210,54%,20%,.2) hsla(210,54%,20%,.25);
-    --toolbarbutton-hover-boxshadow: 0 1px hsla(0,0%,100%,.3) inset,
-                                     0 1px hsla(210,54%,20%,.03),
-                                     0 0 2px hsla(210,54%,20%,.1);
-
-    --toolbarbutton-active-background: hsla(210,54%,20%,.15) linear-gradient(hsla(0,0%,100%,.6), hsla(0,0%,100%,.1));
-    --toolbarbutton-active-bordercolor: hsla(210,54%,20%,.3) hsla(210,54%,20%,.35) hsla(210,54%,20%,.4);
-    --toolbarbutton-active-boxshadow: 0 1px 1px hsla(210,54%,20%,.1) inset,
-                                      0 0 1px hsla(210,54%,20%,.2) inset,
-/* allows keyhole-forward-clip-path to be used for non-hover as well as hover: */
-                                      0 1px 0 hsla(210,54%,20%,0),
-                                      0 0 2px hsla(210,54%,20%,0);
-
-    --toolbarbutton-checkedhover-backgroundcolor: rgba(90%,90%,90%,.4);
-  }
-}
-
-#nav-bar .toolbarbutton-1 > .toolbarbutton-menubutton-button > .toolbarbutton-icon:-moz-locale-dir(ltr),
-#nav-bar .toolbarbutton-1 > .toolbarbutton-menubutton-dropmarker > .dropmarker-icon:-moz-locale-dir(rtl) {
-  border-top-right-radius: 0;
-  border-bottom-right-radius: 0;
-}
-
-#nav-bar .toolbarbutton-1 > .toolbarbutton-menubutton-button > .toolbarbutton-icon:-moz-locale-dir(rtl),
-#nav-bar .toolbarbutton-1 > .toolbarbutton-menubutton-dropmarker > .dropmarker-icon:-moz-locale-dir(ltr) {
-  border-top-left-radius: 0;
-  border-bottom-left-radius: 0;
-}
-
-#nav-bar .toolbarbutton-1 > .toolbarbutton-menubutton-button > .toolbarbutton-icon {
-  border-inline-end-style: none;
-}
-
-#nav-bar .toolbarbutton-1:not(:-moz-any(@primaryToolbarButtons@, .toolbarbutton-legacy-addon)) > .toolbarbutton-icon,
-#nav-bar .toolbarbutton-1:not(:-moz-any(@primaryToolbarButtons@, .toolbarbutton-legacy-addon)) > .toolbarbutton-badge-stack,
-#nav-bar .toolbarbutton-1:not(:-moz-any(@primaryToolbarButtons@, .toolbarbutton-legacy-addon)) > .toolbarbutton-menubutton-button > .toolbarbutton-icon {
-  padding: calc(var(--toolbarbutton-vertical-inner-padding) + 1px) 7px;
-}
-
-#nav-bar .toolbarbutton-1[type=panel] > .toolbarbutton-icon,
-#nav-bar .toolbarbutton-1[type=panel] > .toolbarbutton-badge-stack,
-#nav-bar .toolbarbutton-1[type=menu]:not(#PanelUI-menu-button):not(#back-button):not(#forward-button):not(#new-tab-button) > .toolbarbutton-icon,
-#nav-bar .toolbarbutton-1[type=menu]:not(#PanelUI-menu-button) > .toolbarbutton-badge-stack,
-#nav-bar .toolbarbutton-1[type=menu] > .toolbarbutton-text /* hack for add-ons that forcefully display the label */ {
-  padding-inline-end: 17px;
-}
-
-#nav-bar .toolbarbutton-1[type=panel] > .toolbarbutton-icon,
-#nav-bar .toolbarbutton-1[type=menu]:not(#PanelUI-menu-button):not(#back-button):not(#forward-button):not(#new-tab-button) > .toolbarbutton-icon {
-  /* horizontal padding + border + icon width */
-  max-width: 43px;
-}
-
-#nav-bar .toolbarbutton-1 > .toolbarbutton-menu-dropmarker {
-  margin-inline-start: -15px;
-}
-
-#nav-bar #bookmarks-menu-button[cui-areatype="toolbar"] > .toolbarbutton-menubutton-button > .toolbarbutton-icon {
-  /* horizontal padding + border + actual icon width */
-  max-width: 31px;
-}
-
-#nav-bar .toolbarbutton-1 > .toolbarbutton-menubutton-dropmarker > .dropmarker-icon {
-  padding-top: calc(var(--toolbarbutton-vertical-inner-padding) + 6px);
-  padding-bottom: calc(var(--toolbarbutton-vertical-inner-padding) + 6px);
-}
-
-#nav-bar .toolbaritem-combined-buttons {
-  margin-left: 2px;
-  margin-right: 2px;
-}
-
-#nav-bar .toolbaritem-combined-buttons > .toolbarbutton-1 {
-  padding-left: 0;
-  padding-right: 0;
-}
-
-#nav-bar .toolbaritem-combined-buttons:not(:hover) > separator,
-#nav-bar .toolbarbutton-1:not(:hover):not(:active):not([open]) > .toolbarbutton-menubutton-dropmarker::before {
-  content: "";
-  display: -moz-box;
-  width: 1px;
-  height: 16px;
-  margin-inline-end: -1px;
-  background-image: linear-gradient(currentColor 0, currentColor 100%);
-  background-position: center;
-  background-repeat: no-repeat;
-  background-size: 1px 16px;
-  opacity: .2;
-}
-
-#nav-bar[brighttext] .toolbaritem-combined-buttons > separator,
-#nav-bar[brighttext] .toolbarbutton-1:not(:hover):not(:active):not([open]) > .toolbarbutton-menubutton-dropmarker::before {
-  opacity: .3;
-}
-
-.findbar-button:not(:-moz-any([checked="true"],[disabled="true"])):hover > .toolbarbutton-text,
-#nav-bar .toolbarbutton-1:not([disabled=true]) > .toolbarbutton-menubutton-button[open] + .toolbarbutton-menubutton-dropmarker > .dropmarker-icon,
-#nav-bar .toolbarbutton-1:not([disabled=true]):-moz-any(:hover,[open]) > .toolbarbutton-menubutton-button > .toolbarbutton-icon,
-#nav-bar .toolbarbutton-1:not([disabled=true]):-moz-any(:hover,[open]) > .toolbarbutton-menubutton-dropmarker > .dropmarker-icon,
-#nav-bar .toolbarbutton-1:not([disabled=true]):not([checked]):not([open]):not(:active):hover > .toolbarbutton-icon,
-#nav-bar .toolbarbutton-1:not([disabled=true]):not([checked]):not([open]):not(:active):hover > .toolbarbutton-text,
-#nav-bar .toolbarbutton-1:not([disabled=true]):not([checked]):not([open]):not(:active):hover > .toolbarbutton-badge-stack,
-@conditionalForwardWithUrlbar@ > #forward-button:not([open]):not(:active):not([disabled]):hover > .toolbarbutton-icon,
-#nav-bar .toolbarbutton-1:not([buttonover]):not([open]):not(:active):hover > .toolbarbutton-menubutton-dropmarker:not([disabled]) > .dropmarker-icon {
-  background: var(--toolbarbutton-hover-background);
-  border-color: var(--toolbarbutton-hover-bordercolor);
-  box-shadow: var(--toolbarbutton-hover-boxshadow);
-}
-
-.findbar-button:not([disabled=true]):-moz-any([checked="true"],:hover:active) > .toolbarbutton-text,
-#nav-bar .toolbarbutton-1 > .toolbarbutton-menubutton-button:not([disabled=true]):-moz-any(:hover:active, [open]) > .toolbarbutton-icon,
-#nav-bar .toolbarbutton-1[open] > .toolbarbutton-menubutton-dropmarker:not([disabled=true]) > .dropmarker-icon,
-#nav-bar .toolbarbutton-1:not([disabled=true]):-moz-any([open],[checked],:hover:active) > .toolbarbutton-icon,
-#nav-bar .toolbarbutton-1:not([disabled=true]):-moz-any([open],[checked],:hover:active) > .toolbarbutton-text,
-#nav-bar .toolbarbutton-1:not([disabled=true]):-moz-any([open],[checked],:hover:active) > .toolbarbutton-badge-stack {
-  background: var(--toolbarbutton-active-background);
-  border-color: var(--toolbarbutton-active-bordercolor);
-  box-shadow: var(--toolbarbutton-active-boxshadow);
-  transition-duration: 10ms;
-}
-
-#nav-bar .toolbarbutton-1[checked]:not(:active):hover > .toolbarbutton-icon {
-  background-color: var(--toolbarbutton-checkedhover-backgroundcolor);
-  transition: background-color .4s;
-}
-
-#TabsToolbar .toolbarbutton-1,
-#TabsToolbar .toolbarbutton-1 > .toolbarbutton-menubutton-button,
-.tabbrowser-arrowscrollbox > .scrollbutton-up,
-.tabbrowser-arrowscrollbox > .scrollbutton-down {
-  -moz-appearance: none;
-  border-style: none;
-  padding: 0 3px;
-}
-
-#TabsToolbar .toolbarbutton-1 {
-  margin-bottom: var(--tab-toolbar-navbar-overlap);
-}
-
-#TabsToolbar .toolbarbutton-1:not([disabled=true]):hover,
-#TabsToolbar .toolbarbutton-1[open],
-#TabsToolbar .toolbarbutton-1 > .toolbarbutton-menubutton-button:not([disabled=true]):hover,
-.tabbrowser-arrowscrollbox > .scrollbutton-up:not([disabled=true]):hover,
-.tabbrowser-arrowscrollbox > .scrollbutton-down:not([disabled=true]):hover {
-  background-image: linear-gradient(transparent, rgba(255,255,255,.5)),
-                    linear-gradient(transparent, rgba(0,0,0,.25) 30%),
-                    linear-gradient(transparent, rgba(0,0,0,.25) 30%);
-  background-position: 1px -1px, 0 -1px, 100% -1px;
-  background-size: calc(100% - 2px) 100%, 1px 100%, 1px 100%;
-  background-repeat: no-repeat;
-}
-
-/* unified back/forward button */
-
-:-moz-any(#back-button, #forward-button) > .toolbarbutton-icon {
-  border-color: var(--urlbar-border-color-hover) !important;
-}
-
-:-moz-any(#back-button, #forward-button):not(:hover):not(:active):not([open=true]) > .toolbarbutton-icon,
-:-moz-any(#back-button, #forward-button)[disabled=true] > .toolbarbutton-icon {
-  background-color: rgba(255,255,255,.15) !important;
-}
-
-#forward-button {
-  -moz-box-align: stretch; /* let the button shape grow vertically with the location bar */
-  padding: 0 !important;
-}
-
-#forward-button > menupopup {
-  margin-top: 1px !important;
-}
-
-#forward-button > .toolbarbutton-icon {
-  border-left-style: none !important;
-  border-radius: 0 !important;
-  padding-left: calc(var(--backbutton-urlbar-overlap) + 3px) !important;
-  padding-right: 3px !important;
-  max-width: calc(var(--forwardbutton-width) + var(--backbutton-urlbar-overlap)) !important;
-}
-
-@conditionalForwardWithUrlbar@:not([switchingtabs]) > #forward-button {
-  transition: margin-left @forwardTransitionLength@ ease-out;
-}
-
-@conditionalForwardWithUrlbar@ > #forward-button[disabled] {
-  margin-left: calc(0px - var(--forwardbutton-width) - var(--backbutton-urlbar-overlap));
-}
-
-@conditionalForwardWithUrlbar@:hover:not([switchingtabs]) > #forward-button[disabled] {
-  /* delay the hiding of the forward button when hovered to avoid accidental clicks on the url bar */
-  transition-delay: 100s;
-}
-
-@conditionalForwardWithUrlbar@:not(:hover) > #forward-button[disabled] {
-  /* when not hovered anymore, trigger a new transition to hide the forward button immediately */
-  margin-left: calc(-0.01px - var(--forwardbutton-width) - var(--backbutton-urlbar-overlap));
-}
-
-#back-button {
-  padding-top: 3px !important;
-  padding-bottom: 3px !important;
-  padding-inline-start: 5px !important;
-  padding-inline-end: 0 !important;
-  position: relative !important;
-  z-index: 1 !important;
-  border-radius: 0 10000px 10000px 0 !important;
-}
-
-#back-button:-moz-locale-dir(rtl) {
-  border-radius: 10000px 0 0 10000px !important;
-}
-
-#back-button > menupopup {
-  margin-top: -1px !important;
-}
-
-#back-button > .toolbarbutton-icon {
-  border-radius: 10000px !important;
-  padding: 6px !important;
-  max-width: 32px !important; /* icon width + horizontal padding + border */
-}
-
-#back-button:-moz-locale-dir(rtl) > .toolbarbutton-icon {
-  transform: scaleX(-1);
-}
-
-.unified-nav-back[_moz-menuactive]:-moz-locale-dir(ltr),
-.unified-nav-forward[_moz-menuactive]:-moz-locale-dir(rtl) {
-  list-style-image: url("chrome://browser/skin/menu-back.png") !important;
-}
-
-.unified-nav-forward[_moz-menuactive]:-moz-locale-dir(ltr),
-.unified-nav-back[_moz-menuactive]:-moz-locale-dir(rtl) {
-  list-style-image: url("chrome://browser/skin/menu-forward.png") !important;
-}
-
-/* undo close tab menu item */
-#alltabs_undoCloseTab {
-  list-style-image: url(chrome://browser/skin/undoCloseTab.png);
-}
-
-@media (min-resolution: 1.1dppx) {
-  #alltabs_undoCloseTab {
-    list-style-image: url(chrome://browser/skin/undoCloseTab@2x.png);
-  }
-  #alltabs_undoCloseTab > .toolbarbutton-icon {
-    width: 16px;
-  }
-}
-
-/* zoom control text (reset) button special case: */
-
-#nav-bar #zoom-reset-button > .toolbarbutton-text {
-  /* To make this line up with the icons, it needs the same height (18px) +
-   * padding (2 * 2px) + border (2 * 1px), but as a minimum because otherwise
-   * increase in text sizes would break things...
-   */
-  min-height: 24px;
-}
-
-/* ::::: fullscreen window controls ::::: */
-
-#minimize-button,
-#restore-button,
-#close-button {
-  -moz-appearance: none;
-  border: none;
-  margin: 0 !important;
-  padding: 6px 12px;
-}
-
-#minimize-button {
-  list-style-image: url(chrome://browser/skin/caption-buttons.svg#minimize);
-}
-
-#restore-button {
-  list-style-image: url(chrome://browser/skin/caption-buttons.svg#restore);
-}
-
-#minimize-button:hover,
-#restore-button:hover {
-  background-color: hsla(0, 0%, 0%, .12);
-}
-
-#minimize-button:hover:active,
-#restore-button:hover:active {
-  background-color: hsla(0, 0%, 0%, .22);
-}
-
-#close-button {
-  list-style-image: url(chrome://browser/skin/caption-buttons.svg#close);
-}
-
-#close-button:hover {
-  background-color: hsl(355, 86%, 49%);
-  list-style-image: url(chrome://browser/skin/caption-buttons.svg#close-white);
-}
-
-#close-button:hover:active {
-  background-color: hsl(355, 82%, 69%);
-}
-
-toolbar[brighttext] #minimize-button {
-  list-style-image: url(chrome://browser/skin/caption-buttons.svg#minimize-white);
-}
-
-toolbar[brighttext] #restore-button {
-  list-style-image: url(chrome://browser/skin/caption-buttons.svg#restore-white);
-}
-
-toolbar[brighttext] #close-button {
-  list-style-image: url(chrome://browser/skin/caption-buttons.svg#close-white);
-}
-
-@media (-moz-os-version: windows-win7) {
-  #window-controls {
-    margin-inline-start: 4px;
-  }
-
-  #minimize-button,
-  #restore-button,
-  #close-button {
-    /* Important to ensure this applies even on toolbar[brighttext] */
-    list-style-image: url("chrome://global/skin/icons/windowControls.png") !important;
-    /* Also override background color to a avoid hover background styling
-     * leaking through around the image. */
-    background-color: transparent !important;
-    padding: 0;
-  }
-
-  #minimize-button {
-    -moz-image-region: rect(0, 16px, 16px, 0);
-  }
-
-  #minimize-button:hover {
-    -moz-image-region: rect(16px, 16px, 32px, 0);
-  }
-
-  #minimize-button:hover:active {
-    -moz-image-region: rect(32px, 16px, 48px, 0);
-  }
-
-  #restore-button {
-    -moz-image-region: rect(0, 32px, 16px, 16px);
-  }
-
-  #restore-button:hover {
-    -moz-image-region: rect(16px, 32px, 32px, 16px);
-  }
-
-  #restore-button:hover:active {
-    -moz-image-region: rect(32px, 32px, 48px, 16px);
-  }
-
-  #close-button {
-    -moz-image-region: rect(0, 48px, 16px, 32px);
-    -moz-appearance: none;
-    border-style: none;
-    margin: 2px;
-  }
-
-  #close-button:hover {
-    -moz-image-region: rect(16px, 48px, 32px, 32px);
-  }
-
-  #close-button:hover:active {
-    -moz-image-region: rect(32px, 48px, 48px, 32px);
-  }
-}
-
-@media (-moz-os-version: windows-win7) {
-  #window-controls {
-    -moz-box-align: start;
-  }
-
-  #minimize-button,
-  #restore-button,
-  #close-button {
-    -moz-appearance: none;
-    border-style: none;
-    margin: 0;
-  }
-
-  #close-button {
-    -moz-image-region: rect(0, 49px, 16px, 32px);
-  }
-
-  #close-button:hover {
-    -moz-image-region: rect(16px, 49px, 32px, 32px);
-  }
-
-  #close-button:hover:active {
-    -moz-image-region: rect(32px, 49px, 48px, 32px);
-  }
-
-  #minimize-button:-moz-locale-dir(rtl),
-  #restore-button:-moz-locale-dir(rtl),
-  #close-button:-moz-locale-dir(rtl) {
-    transform: scaleX(-1);
-  }
-}
-
-/* ::::: Location Bar ::::: */
-
-#main-window {
-  --urlbar-border-color: ThreeDShadow;
-  --urlbar-border-color-hover: var(--urlbar-border-color);
-}
-
-#navigator-toolbox:-moz-lwtheme {
-  --urlbar-border-color: var(--toolbarbutton-hover-bordercolor);
-}
-
-@media (-moz-windows-default-theme) {
-  @media (-moz-os-version: windows-win7),
-         (-moz-os-version: windows-win8) {
-    #main-window:not(:-moz-lwtheme) {
-      --urlbar-border-color: hsla(210,54%,20%,.25) hsla(210,54%,20%,.27) hsla(210,54%,20%,.3);
-      --urlbar-border-color-hover: hsla(210,54%,20%,.35) hsla(210,54%,20%,.37) hsla(210,54%,20%,.4);
-    }
-  }
-
-  @media (-moz-os-version: windows-win10) {
-    #main-window:not(:-moz-lwtheme) {
-      --urlbar-border-color: hsl(0,0%,90%);
-      --urlbar-border-color-hover: hsl(0,0%,80%);
-    }
-  }
-}
-
-#urlbar,
-.searchbar-textbox {
-  -moz-appearance: none;
-  margin: 0 3px;
-  padding: 0;
-  background-clip: padding-box;
-  border: 1px solid;
-  border-color: var(--urlbar-border-color);
-}
-
-#urlbar:hover,
-.searchbar-textbox:hover {
-  border-color: var(--urlbar-border-color-hover);
-}
-
-@media (-moz-windows-default-theme) {
-  #urlbar,
-  .searchbar-textbox {
-    border-radius: 1px;
-  }
-
-  @media (-moz-os-version: windows-win7),
-         (-moz-os-version: windows-win8) {
-    #urlbar:not(:-moz-lwtheme),
-    .searchbar-textbox:not(:-moz-lwtheme) {
-      box-shadow: 0 1px 0 hsla(0,0%,0%,.01) inset,
-                  0 1px 0 hsla(0,0%,100%,.1);
-    }
-  }
-
-  @media (-moz-os-version: windows-win10) {
-    #urlbar:not(:-moz-lwtheme),
-    .searchbar-textbox:not(:-moz-lwtheme) {
-      padding: 1px;
-      transition-property: border-color, box-shadow;
-      transition-duration: .1s;
-    }
-
-    #urlbar:not(:-moz-lwtheme)[focused],
-    .searchbar-textbox:not(:-moz-lwtheme)[focused] {
-      box-shadow: 0 0 0 1px Highlight inset;
-    }
-  }
-
-  #urlbar:not(:-moz-lwtheme)[focused],
-  .searchbar-textbox:not(:-moz-lwtheme)[focused] {
-    border-color: Highlight;
-  }
-}
-
-@media (-moz-os-version: windows-win10) {
-  #urlbar,
-  .searchbar-textbox {
-    font-size: 1.15em;
-    min-height: 28px;
-  }
-
-  :root {
-    /* let toolbar buttons match the location and search bar's minimum height */
-    --toolbarbutton-vertical-inner-padding: 4px;
-    --toolbarbutton-vertical-outer-padding: 5px;
-  }
-}
-
-#urlbar:-moz-lwtheme,
-.searchbar-textbox:-moz-lwtheme {
-  background-color: rgba(255,255,255,.8);
-  color: black;
-}
-
-#urlbar:-moz-lwtheme:hover:not([readonly]),
-.searchbar-textbox:-moz-lwtheme:hover {
-  background-color: rgba(255,255,255,.9);
-}
-
-#urlbar:-moz-lwtheme[focused]:not([readonly]),
-.searchbar-textbox:-moz-lwtheme[focused] {
-  background-color: white;
-}
-
-@conditionalForwardWithUrlbar@ > #urlbar {
-  border-inline-start: none;
-  padding-inline-start: 0;
-  margin-left: 0;
-}
-
-@conditionalForwardWithUrlbar@ > #urlbar:-moz-locale-dir(ltr) {
-  border-top-left-radius: 0;
-  border-bottom-left-radius: 0;
-}
-
-@conditionalForwardWithUrlbar@ > #urlbar:-moz-locale-dir(rtl) {
-  border-top-right-radius: 0;
-  border-bottom-right-radius: 0;
-}
-
-@conditionalForwardWithUrlbar@ {
-  clip-path: url("chrome://browser/content/browser.xul#urlbar-back-button-clip-path");
-  margin-inline-start: calc(-1 * var(--backbutton-urlbar-overlap));
-}
-
-@media (-moz-os-version: windows-win10) {
-  @conditionalForwardWithUrlbar@ {
-    clip-path: url("chrome://browser/content/browser.xul#urlbar-back-button-clip-path-win10");
-  }
-
-  :root {
-    --backbutton-urlbar-overlap: 9px;
-  }
-}
-
-@conditionalForwardWithUrlbar@:-moz-locale-dir(rtl),
-@conditionalForwardWithUrlbar@ > #urlbar:-moz-locale-dir(rtl) {
-  /* let urlbar-back-button-clip-path clip the urlbar's right side for RTL */
-  transform: scaleX(-1);
-}
-
-@conditionalForwardWithUrlbar@:-moz-locale-dir(rtl) {
-  -moz-box-direction: reverse;
-}
-
-html|*.urlbar-input:-moz-lwtheme::placeholder,
-.searchbar-textbox:-moz-lwtheme > .autocomplete-textbox-container > .textbox-input-box > html|*.textbox-input::placeholder {
-  opacity: 1.0;
-  color: #777;
-}
-
-#urlbar-container {
-  -moz-box-align: center;
-}
-
-.urlbar-textbox-container {
-  -moz-box-align: stretch;
-}
-
-.urlbar-input-box {
-  margin-inline-start: 0;
-}
-
-.urlbar-input-box,
-#urlbar-display-box {
-  padding-inline-start: 4px;
-  border-inline-start: 1px solid var(--urlbar-separator-color);
-  border-image: linear-gradient(transparent 15%, var(--urlbar-separator-color) 15%, var(--urlbar-separator-color) 85%, transparent 85%);
-  border-image-slice: 1;
-}
-
-#urlbar-icons {
-  -moz-box-align: center;
-}
-
-.urlbar-icon {
-  padding: 0 3px;
-  /* 16x16 icon with border-box sizing */
-  width: 22px;
-  height: 16px;
-}
-
-/* ::::: URL Bar Zoom Reset Button ::::: */
-@keyframes urlbar-zoom-reset-pulse {
-  0% {
-    transform: scale(0);
-  }
-  75% {
-    transform: scale(1.5);
-  }
-  100% {
-    transform: scale(1.0);
-  }
-}
-
-#urlbar-zoom-button {
-  -moz-appearance: none;
-  margin: 0 3px;
-  font-size: .8em;
-  padding: 0 8px;
-  border-radius: 1em;
-  background-color: hsla(0,0%,0%,.05);
-  color: inherit;
-  border: 1px solid ThreeDLightShadow;
-}
-
-#urlbar-zoom-button[animate="true"] {
-  animation-name: urlbar-zoom-reset-pulse;
-  animation-duration: 250ms;
-}
-
-#urlbar-zoom-button:hover {
-  background-color: hsla(0,0%,0%,.1);
-}
-
-#urlbar-zoom-button:hover:active {
-  background-color: hsla(0,0%,0%,.15);
-}
-
-#urlbar-zoom-button > .toolbarbutton-text {
-  display: -moz-box;
-}
-
-#urlbar-zoom-button > .toolbarbutton-icon {
-  display: none;
-}
-
-.search-go-container {
-  padding: 2px 2px;
-}
-
-#urlbar-search-footer {
-  border-top: 1px solid var(--panel-separator-color);
-  background-color: var(--arrowpanel-dimmed);
-}
-
-#urlbar-search-settings {
-  -moz-appearance: none;
-  -moz-user-focus: ignore;
-  color: GrayText;
-  margin: 0;
-  border: 0;
-  padding: 8px 20px;
-  background: transparent;
-}
-
-#urlbar-search-settings:hover {
-  background-color: var(--arrowpanel-dimmed);
-}
-
-#urlbar-search-settings:hover:active {
-  background-color: var(--arrowpanel-dimmed-further);
-}
-
-#urlbar-search-splitter {
-  min-width: 6px;
-  margin-inline-start: -3px;
-  border: none;
-  background: transparent;
-}
-
-#urlbar-search-splitter + #search-container > #searchbar > .searchbar-textbox {
-  margin-inline-start: 0;
-}
-
-.urlbar-display {
-  margin-top: 0;
-  margin-bottom: 0;
-  margin-inline-start: 0;
-  color: GrayText;
-}
-
-%include ../shared/urlbarSearchSuggestionsNotification.inc.css
-
-#search-container {
-  min-width: calc(54px + 11ch);
-}
-
-/* identity box */
-
-#identity-box:-moz-focusring {
-  outline: 1px dotted;
-  outline-offset: -3px;
-}
-
-/* Location bar dropmarker */
-
-.urlbar-history-dropmarker {
-  -moz-appearance: none;
-  padding: 0 3px;
-  background-color: transparent;
-  border: none;
-  width: auto;
-  list-style-image: var(--urlbar-dropmarker-url);
-  -moz-image-region: var(--urlbar-dropmarker-region);
-  transition: opacity 0.15s ease;
-}
-
-#urlbar-wrapper[switchingtabs] > #urlbar > .urlbar-textbox-container > .urlbar-history-dropmarker {
-  transition: none;
-}
-
-#navigator-toolbox:not(:hover) #nav-bar:not([customizing="true"]) #urlbar:not([focused]) > .urlbar-textbox-container > .urlbar-history-dropmarker {
-  opacity: 0;
-}
-
-.urlbar-history-dropmarker:hover {
-  -moz-image-region: var(--urlbar-dropmarker-hover-region);
-}
-
-.urlbar-history-dropmarker:hover:active,
-.urlbar-history-dropmarker[open="true"] {
-  -moz-image-region: var(--urlbar-dropmarker-active-region);
-}
-
-@media (min-resolution: 1.1dppx) {
-  .urlbar-history-dropmarker {
-    list-style-image: var(--urlbar-dropmarker-2x-url);
-    -moz-image-region: var(--urlbar-dropmarker-2x-region);
-  }
-
-  .urlbar-history-dropmarker:hover {
-    -moz-image-region: var(--urlbar-dropmarker-hover-2x-region);
-  }
-
-  .urlbar-history-dropmarker[open="true"],
-  .urlbar-history-dropmarker:hover:active {
-    -moz-image-region: var(--urlbar-dropmarker-active-2x-region);
-  }
-
-  .urlbar-history-dropmarker > .dropmarker-icon {
-    width: 11px;
-  }
-}
-
-/* page proxy icon */
-
-%include ../shared/identity-block/identity-block.inc.css
-
-/* autocomplete */
-
-%include ../shared/autocomplete.inc.css
-
-#PopupAutoComplete > richlistbox > richlistitem[originaltype~="datalist-first"] {
-  border-top: 1px solid ThreeDShadow;
-}
-
-#treecolAutoCompleteImage {
-  max-width: 36px;
-}
-
-.autocomplete-richlistbox {
-  padding: 4px;
-}
-
-.autocomplete-richlistitem {
-  height: 30px;
-  min-height: 30px;
-  font: message-box;
-  border-radius: 2px;
-  border: 1px solid transparent;
-}
-
-.autocomplete-richlistitem[selected=true] {
-  background-color: hsl(210, 80%, 52%);
-}
-
-.ac-title {
-  font-size: 14px;
-  color: hsl(0, 0%, 0%);
-}
-
-.ac-tags {
-  font-size: 12px;
-}
-
-html|span.ac-tag {
-  background-color: hsl(216, 0%, 88%);
-  color: hsl(0, 0%, 0%);
-  border-radius: 2px;
-  border: 1px solid transparent;
-  padding: 0 1px;
-}
-
-.ac-separator,
-.ac-url,
-.ac-action {
-  font-size: 12px;
-}
-
-.ac-separator {
-  color: hsl(0, 0%, 50%);
-}
-
-.ac-url {
-  color: hsl(210, 77%, 47%);
-}
-
-.ac-action {
-  color: hsl(178, 100%, 28%);
-}
-
-.ac-title[selected=true],
-.ac-separator[selected],
-.ac-url[selected=true],
-.ac-action[selected=true] {
-  color: hsl(0, 0%, 100%);
-}
-
-.ac-tags-text[selected] > html|span.ac-tag {
-  background-color: hsl(0, 0%, 100%);
-  color: hsl(210, 80%, 40%);
-}
-
-html|span.ac-emphasize-text-title,
-html|span.ac-emphasize-text-tag,
-html|span.ac-emphasize-text-url {
-  font-weight: 600;
-}
-
-@media not all and (-moz-windows-default-theme) {
-  .autocomplete-richlistitem[selected=true] {
-    background-color: Highlight;
-  }
-
-  .ac-title {
-    color: inherit;
-  }
-
-  html|span.ac-tag {
-    background-color: -moz-FieldText;
-    color: -moz-Field;
-  }
-
-  .ac-separator,
-  .ac-url,
-  .ac-action {
-    color: -moz-nativehyperlinktext;
-  }
-
-  .ac-tags-text[selected] > html|span.ac-tag {
-    background-color: HighlightText;
-    color: Highlight;
-  }
-}
-
-.ac-type-icon[type=bookmark] {
-  list-style-image: url("chrome://browser/skin/urlbar-star.svg#star");
-}
-
-.ac-type-icon[type=bookmark][selected][current] {
-  list-style-image: url("chrome://browser/skin/urlbar-star.svg#star-inverted");
-}
-
-.autocomplete-treebody::-moz-tree-image(bookmark, treecolAutoCompleteImage) {
-  list-style-image: url("chrome://browser/skin/places/autocomplete-star.png");
-  -moz-image-region: rect(0 16px 16px 0);
-  width: 16px;
-  height: 16px;
-}
-
-@media (min-resolution: 1.1dppx) {
-  .autocomplete-treebody::-moz-tree-image(bookmark, treecolAutoCompleteImage) {
-    list-style-image: url("chrome://browser/skin/places/autocomplete-star@2x.png");
-    -moz-image-region: rect(0 32px 32px 0);
-  }
-}
-
-@media not all and (-moz-os-version: windows-vista) and (-moz-windows-default-theme) {
-  @media not all and (-moz-os-version: windows-win7) and (-moz-windows-default-theme) {
-    .autocomplete-treebody::-moz-tree-image(selected, current, bookmark, treecolAutoCompleteImage) {
-      -moz-image-region: rect(0 32px 16px 16px);
-    }
-
-    @media (min-resolution: 1.1dppx) {
-      .autocomplete-treebody::-moz-tree-image(selected, current, bookmark, treecolAutoCompleteImage) {
-        -moz-image-region: rect(0 64px 32px 32px);
-      }
-    }
-
-    .autocomplete-treebody::-moz-tree-image(keyword, treecolAutoCompleteImage, selected) {
-      list-style-image: url(chrome://global/skin/icons/autocomplete-search.svg#search-icon-inverted);
-    }
-  }
-}
-
-.ac-type-icon[type=keyword],
-.ac-site-icon[type=searchengine],
-.autocomplete-treebody::-moz-tree-image(keyword, treecolAutoCompleteImage) {
-  list-style-image: url(chrome://global/skin/icons/autocomplete-search.svg#search-icon);
-}
-
-.ac-type-icon[type=keyword][selected],
-.ac-site-icon[type=searchengine][selected],
-.autocomplete-treebody::-moz-tree-image(keyword, treecolAutoCompleteImage, selected) {
-  list-style-image: url(chrome://global/skin/icons/autocomplete-search.svg#search-icon-inverted);
-}
-
-.autocomplete-treebody::-moz-tree-image(tag, treecolAutoCompleteImage) {
-  list-style-image: url("chrome://browser/skin/places/tag.png");
-  width: 16px;
-  height: 16px;
-}
-
-.ac-type-icon[type=switchtab],
-.ac-type-icon[type=remotetab] {
-  list-style-image: url("chrome://browser/skin/urlbar-tab.svg#tab");
-}
-
-.ac-type-icon[type=switchtab][selected],
-.ac-type-icon[type=remotetab][selected] {
-  list-style-image: url("chrome://browser/skin/urlbar-tab.svg#tab-inverted");
-}
-
-.autocomplete-treebody::-moz-tree-cell-text(treecolAutoCompleteComment) {
-  color: GrayText;
-}
-
-.autocomplete-treebody::-moz-tree-cell-text(suggesthint, treecolAutoCompleteComment),
-.autocomplete-treebody::-moz-tree-cell-text(suggestfirst, treecolAutoCompleteComment)
-{
-  color: GrayText;
-  font-size: smaller;
-}
-
-.autocomplete-treebody::-moz-tree-cell(suggesthint) {
-  border-top: 1px solid GrayText;
-}
-
-/* combined go/reload/stop button in location bar */
-
-#urlbar-go-button,
-#urlbar-reload-button,
-#urlbar-stop-button {
-  -moz-appearance: none;
-  border-style: none;
-  list-style-image: url("chrome://browser/skin/reload-stop-go.png");
-  padding: 0 9px;
-  margin-inline-start: 5px;
-  border-inline-start: 1px solid var(--urlbar-separator-color);
-  border-image: linear-gradient(transparent 15%,
-                                var(--urlbar-separator-color) 15%,
-                                var(--urlbar-separator-color) 85%,
-                                transparent 85%);
-  border-image-slice: 1;
-}
-
-#urlbar-reload-button {
-  -moz-image-region: rect(0, 14px, 14px, 0);
-}
-
-#urlbar-reload-button:not([disabled]):hover {
-  -moz-image-region: rect(14px, 14px, 28px, 0);
-}
-
-#urlbar-reload-button:not([disabled]):hover:active {
-  -moz-image-region: rect(28px, 14px, 42px, 0);
-}
-
-#urlbar-reload-button:-moz-locale-dir(rtl) > .toolbarbutton-icon {
-  transform: scaleX(-1);
-}
-
-#urlbar-go-button {
-  -moz-image-region: rect(0, 42px, 14px, 28px);
-}
-
-#urlbar-go-button:hover {
-  -moz-image-region: rect(14px, 42px, 28px, 28px);
-}
-
-#urlbar-go-button:hover:active {
-  -moz-image-region: rect(28px, 42px, 42px, 28px);
-}
-
-#urlbar-go-button:-moz-locale-dir(rtl) > .toolbarbutton-icon {
-  transform: scaleX(-1);
-}
-
-#urlbar-stop-button {
-  -moz-image-region: rect(0, 28px, 14px, 14px);
-}
-
-#urlbar-stop-button:not([disabled]):hover {
-  -moz-image-region: rect(14px, 28px, 28px, 14px);
-}
-
-#urlbar-stop-button:hover:active {
-  -moz-image-region: rect(28px, 28px, 42px, 14px);
-}
-
-@media (min-resolution: 1.1dppx) {
-  #urlbar-go-button,
-  #urlbar-reload-button,
-  #urlbar-stop-button {
-    list-style-image: url("chrome://browser/skin/reload-stop-go@2x.png");
-  }
-
-  #urlbar-go-button > .toolbarbutton-icon,
-  #urlbar-reload-button > .toolbarbutton-icon,
-  #urlbar-stop-button > .toolbarbutton-icon {
-    width: 14px;
-  }
-
-  #urlbar-go-button {
-    -moz-image-region: rect(0, 84px, 28px, 56px);
-  }
-
-  #urlbar-go-button:hover {
-    -moz-image-region: rect(28px, 84px, 56px, 56px);
-  }
-
-  #urlbar-go-button:hover:active {
-    -moz-image-region: rect(56px, 84px, 84px, 56px);
-  }
-
-  #urlbar-reload-button {
-    -moz-image-region: rect(0, 28px, 28px, 0);
-  }
-
-  #urlbar-reload-button:not([disabled]):hover {
-    -moz-image-region: rect(28px, 28px, 56px, 0);
-  }
-
-  #urlbar-reload-button:not([disabled]):hover:active {
-    -moz-image-region: rect(56px, 28px, 84px, 0);
-  }
-
-  #urlbar-stop-button {
-    -moz-image-region: rect(0, 56px, 28px, 28px);
-  }
-
-  #urlbar-stop-button:not([disabled]):hover {
-    -moz-image-region: rect(28px, 56px, 56px, 28px);
-  }
-
-  #urlbar-stop-button:hover:active {
-    -moz-image-region: rect(56px, 56px, 84px, 28px);
-  }
-}
-
-/* popup blocker button */
-
-#page-report-button {
-  list-style-image: url("chrome://browser/skin/urlbar-popup-blocked.png");
-  -moz-image-region: rect(0, 16px, 16px, 0);
-}
-
-#page-report-button:hover {
-  -moz-image-region: rect(0, 32px, 16px, 16px);
-}
-
-#page-report-button:hover:active,
-#page-report-button[open="true"] {
-  -moz-image-region: rect(0, 48px, 16px, 32px);
-}
-
-/* Reader mode button */
-
-#reader-mode-button {
-  list-style-image: url("chrome://browser/skin/readerMode.svg");
-  -moz-image-region: rect(0, 16px, 16px, 0);
-}
-
-#reader-mode-button:hover,
-#reader-mode-button[readeractive]:hover {
-  -moz-image-region: rect(0, 32px, 16px, 16px);
-}
-
-#reader-mode-button:hover:active,
-#reader-mode-button[readeractive] {
-  -moz-image-region: rect(0, 48px, 16px, 32px);
-}
-
-/* bookmarks menu-button */
-
-#nav-bar #bookmarks-menu-button[cui-areatype="toolbar"]:not([overflowedItem=true]) > .toolbarbutton-menubutton-dropmarker > .dropmarker-icon {
-  padding-top: var(--toolbarbutton-vertical-inner-padding);
-  padding-bottom: var(--toolbarbutton-vertical-inner-padding);
-}
-
-#BMB_bookmarksPopup[side="top"],
-#BMB_bookmarksPopup[side="bottom"] {
-  margin-left: -20px;
-  margin-right: -20px;
-}
-
-#BMB_bookmarksPopup[side="left"],
-#BMB_bookmarksPopup[side="right"] {
-  margin-top: -20px;
-  margin-bottom: -20px;
-}
-
-/* bookmarking panel */
-
-#editBookmarkPanelStarIcon {
-  list-style-image: url("chrome://browser/skin/places/starred48.png");
-  width: 48px;
-  height: 48px;
-}
-
-#editBookmarkPanelStarIcon[unstarred] {
-  list-style-image: url("chrome://browser/skin/places/unstarred48.png");
-}
-
-#editBookmarkPanelTitle {
-  font-size: 130%;
-}
-
-#editBookmarkPanelHeader,
-#editBookmarkPanelContent {
-  margin-bottom: .5em;
-}
-
-/* Implements editBookmarkPanel resizing on folderTree un-collapse. */
-#editBMPanel_folderTree {
-  min-width: 27em;
-}
-
-/* ::::: content area ::::: */
-
-#sidebar {
-  background-color: Window;
-}
-
-#sidebar-title {
-  padding-inline-start: 0px;
-}
-
-#sidebar-header > .close-icon {
-  -moz-appearance: none;
-  padding: 2px;
-  margin: 0;
-  border: none;
-}
-
-@media not all and (min-resolution: 1.1dppx) {
-  #sidebar-header > .close-icon:-moz-lwtheme-brighttext {
-    list-style-image: url("chrome://global/skin/icons/close-inverted.png");
-  }
-}
-
-@media (min-resolution: 1.1dppx) {
-  #sidebar-header > .close-icon:-moz-lwtheme-brighttext {
-    list-style-image: url("chrome://global/skin/icons/close-inverted@2x.png");
-  }
-}
-
-@media (-moz-os-version: windows-win7) {
-  #sidebar-header > .close-icon {
-    padding-top: 4px;
-    padding-bottom: 4px;
-  }
-}
-
-.browserContainer > findbar {
-  background-color: -moz-dialog;
-  color: -moz-DialogText;
-  text-shadow: none;
-}
-
-/* Tabstrip */
-
-#TabsToolbar {
-  min-height: 0;
-  padding: 0;
-  margin-bottom: calc(-1 * var(--tab-toolbar-navbar-overlap)); /* overlap the nav-bar's top border */
-}
-
-%include ../shared/tabs.inc.css
-
-/* Remove border between tab strip and navigation toolbar on Windows 10+ */
-@media not all and (-moz-os-version: windows-win7) {
-  @media not all and (-moz-os-version: windows-win8) {
-    @media (-moz-windows-default-theme) {
-      .tab-background-end[selected=true]::after,
-      .tab-background-start[selected=true]::after {
-        content: none;
-      }
-
-      #TabsToolbar {
-        --tab-stroke-background-size: 0 0;
-      }
-
-      :root {
-        --tab-toolbar-navbar-overlap: 0px;
-      }
-
-      #nav-bar {
-        border-top-style: none !important;
-        box-shadow: none;
-      }
-    }
-  }
-}
-
-/* Invert the unhovered close tab icons on bright-text tabs */
-@media not all and (min-resolution: 1.1dppx) {
-  .tab-close-button:-moz-lwtheme-brighttext,
-  #TabsToolbar[brighttext] .tab-close-button:not([selected="true"]) {
-    list-style-image: url("chrome://global/skin/icons/close-inverted.png");
-  }
-}
-
-@media (min-resolution: 1.1dppx) {
-  .tab-close-button:-moz-lwtheme-brighttext,
-  #TabsToolbar[brighttext] .tab-close-button:not([selected="true"]) {
-    list-style-image: url("chrome://global/skin/icons/close-inverted@2x.png");
-  }
-}
-
-/* tabbrowser-tab focus ring */
-.tabbrowser-tab:focus > .tab-stack > .tab-content {
-  outline: 1px dotted;
-  outline-offset: -6px;
-}
-
-/* Tab DnD indicator */
-.tab-drop-indicator {
-  list-style-image: url(chrome://browser/skin/tabbrowser/tabDragIndicator.png);
-  margin-bottom: -9px;
-  z-index: 3;
-}
-
-/* Tab close button */
-.tab-close-button {
-  -moz-appearance: none;
-  border: none;
-}
-
-/* Tab scrollbox arrow, tabstrip new tab and all-tabs buttons */
-
-.tabbrowser-arrowscrollbox > .scrollbutton-up,
-.tabbrowser-arrowscrollbox > .scrollbutton-down {
-  list-style-image: url("chrome://browser/skin/tabbrowser/tab-arrow-left.svg");
-  margin: 0 0 var(--tab-toolbar-navbar-overlap);
-}
-
-#TabsToolbar[brighttext] > #tabbrowser-tabs > .tabbrowser-arrowscrollbox > .scrollbutton-up,
-#TabsToolbar[brighttext] > #tabbrowser-tabs > .tabbrowser-arrowscrollbox > .scrollbutton-down {
-  list-style-image: url(chrome://browser/skin/tabbrowser/tab-arrow-left-inverted.svg);
-}
-
-.tabbrowser-arrowscrollbox > .scrollbutton-up[disabled],
-.tabbrowser-arrowscrollbox > .scrollbutton-down[disabled] {
-  opacity: .4;
-}
-
-.tabbrowser-arrowscrollbox > .scrollbutton-up:-moz-locale-dir(rtl),
-.tabbrowser-arrowscrollbox > .scrollbutton-down:-moz-locale-dir(ltr) {
-  transform: scaleX(-1);
-}
-
-.tabbrowser-arrowscrollbox > .scrollbutton-down {
-  transition: 1s background-color ease-out;
-}
-
-.tabbrowser-arrowscrollbox > .scrollbutton-down[notifybgtab] {
-  background-color: Highlight;
-  transition: none;
-}
-
-.tabs-newtab-button > .toolbarbutton-icon {
-  margin-top: -1px;
-  margin-bottom: -1px;
-}
-
-.tabs-newtab-button,
-#TabsToolbar > #new-tab-button,
-#TabsToolbar > toolbarpaletteitem > #new-tab-button {
-  list-style-image: url(chrome://browser/skin/tabbrowser/newtab.svg);
-  -moz-image-region: auto;
-}
-
-#TabsToolbar[brighttext] .tabs-newtab-button,
-#TabsToolbar[brighttext] > #new-tab-button,
-#TabsToolbar[brighttext] > toolbarpaletteitem > #new-tab-button {
-  list-style-image: url(chrome://browser/skin/tabbrowser/newtab-inverted.svg);
-}
-
-.tabs-newtab-button > .toolbarbutton-icon,
-#TabsToolbar > #new-tab-button > .toolbarbutton-icon,
-#TabsToolbar > toolbarpaletteitem > #new-tab-button > .toolbarbutton-icon {
-  width: 16px;
-}
-
-#TabsToolbar > #new-tab-button {
-  width: 26px;
-}
-
-#alltabs-button {
-  list-style-image: url("chrome://browser/skin/toolbarbutton-dropdown-arrow.png");
-}
-
-#TabsToolbar[brighttext] > #alltabs-button,
-#TabsToolbar[brighttext] > toolbarpaletteitem > #alltabs-button {
-  list-style-image: url("chrome://browser/skin/toolbarbutton-dropdown-arrow-inverted.png");
-}
-
-#alltabs-button > .toolbarbutton-icon {
-  margin: 0 2px;
-}
-
-#alltabs-button > .toolbarbutton-menu-dropmarker {
-  display: none;
-}
-
-/* All tabs menupopup */
-.alltabs-item > .menu-iconic-left > .menu-iconic-icon {
-  list-style-image: url("chrome://mozapps/skin/places/defaultFavicon.png");
-}
-
-.alltabs-item[selected="true"] {
-  font-weight: bold;
-}
-
-.alltabs-item[busy] > .menu-iconic-left > .menu-iconic-icon {
-  list-style-image: url("chrome://global/skin/icons/loading.png");
-}
-
-@media (min-resolution: 1.1dppx) {
-  .alltabs-item[busy] > .menu-iconic-left > .menu-iconic-icon {
-    list-style-image: url("chrome://global/skin/icons/loading@2x.png");
-  }
-}
-
-toolbarbutton.chevron {
-  list-style-image: url("chrome://global/skin/toolbar/chevron.gif") !important;
-}
-
-toolbar[brighttext] toolbarbutton.chevron {
-  list-style-image: url("chrome://global/skin/toolbar/chevron-inverted.png") !important;
-}
-
-toolbarbutton.chevron:-moz-locale-dir(rtl) > .toolbarbutton-icon {
-  transform: scaleX(-1);
-}
-
-toolbarbutton.chevron > .toolbarbutton-text,
-toolbarbutton.chevron > .toolbarbutton-menu-dropmarker {
-  display: none;
-}
-
-toolbarbutton.chevron > .toolbarbutton-icon {
-  margin: 0;
-}
-
-#sidebar-throbber[loading="true"] {
-  list-style-image: url("chrome://global/skin/icons/loading.png");
-  margin-inline-end: 4px;
-}
-
-@media (min-resolution: 1.1dppx) {
-  #sidebar-throbber[loading="true"] {
-    list-style-image: url("chrome://global/skin/icons/loading@2x.png");
-    width: 16px;
-  }
-}
-
-/* Bookmarks toolbar */
-#PlacesToolbarDropIndicator {
-  list-style-image: url(chrome://browser/skin/places/toolbarDropMarker.png);
-}
-
-toolbarbutton.bookmark-item[dragover="true"][open="true"] {
-  -moz-appearance: none;
-  background: Highlight !important;
-  color: HighlightText !important;
-}
-
-/* rules for menupopup drop indicators */
-.menupopup-drop-indicator-bar {
-  position: relative;
-  /* these two margins must together compensate the indicator's height */
-  margin-top: -1px;
-  margin-bottom: -1px;
-}
-
-.menupopup-drop-indicator {
-  list-style-image: none;
-  height: 2px;
-  margin-inline-end: -4em;
-  background-color: Highlight;
-}
-
-%include ../shared/notification-icons.inc.css
-
-.popup-notification-body[popupid="addon-progress"],
-.popup-notification-body[popupid="addon-install-confirmation"] {
-  width: 28em;
-  max-width: 28em;
-}
-
-.addon-install-confirmation-name {
-  font-weight: bold;
-}
-
-/* Notification icon box */
-
-.notification-anchor-icon:-moz-focusring {
-  outline: 1px dotted -moz-DialogText;
-}
-
-/* Translation infobar */
-
-%include ../shared/translation/infobar.inc.css
-
-notification[value="translation"] {
-  min-height: 40px;
-}
-
-@media (-moz-windows-default-theme) {
-  notification[value="translation"],
-  notification[value="translation"] button,
-  notification[value="translation"] menulist {
-    min-height: 30px;
-    color: #545454;
-  }
-
-  notification[value="translation"] {
-    background-color: #EEE;
-  }
-
-  notification[value="translation"] button,
-  notification[value="translation"] menulist {
-    padding-inline-end: 1ch;
-  }
-
-  notification[value="translation"] menulist {
-    border: 1px solid #C1C1C1;
-    background-color: #FFF;
-  }
-
-  notification[value="translation"] button {
-    border: 1px solid #C1C1C1;
-    background-color: #FBFBFB;
-  }
-
-  notification[value="translation"] button,
-  notification[value="translation"] menulist,
-  notification[value="translation"] menulist > .menulist-label-box {
-    margin-inline-start: 1ch;
-    margin-inline-end: 1ch;
-  }
-
-  notification[value="translation"] button:hover,
-  notification[value="translation"] button:active,
-  notification[value="translation"] menulist:hover,
-  notification[value="translation"] menulist:active {
-    background-color: #EBEBEB;
-  }
-
-  notification[value="translation"] button[anonid="translate"] {
-    color: #FFF;
-    background-color: #0095DD;
-    box-shadow: none;
-    border: 1px solid #006B9D;
-  }
-
-  notification[value="translation"] button[anonid="translate"]:hover,
-  notification[value="translation"] button[anonid="translate"]:active {
-    background-color: #008ACB;
-  }
-
-  notification[value="translation"] button[type="menu"] > .button-box > .button-menu-dropmarker,
-  notification[value="translation"] menulist > .menulist-dropmarker {
-    list-style-image: url("chrome://browser/skin/toolbarbutton-dropdown-arrow.png");
-  }
-
-  notification[value="translation"] button > .button-box,
-  notification[value="translation"] button[type="menu"] > .button-box > .button-menu-dropmarker {
-    padding: 0;
-    margin-inline-start: 3ch;
-  }
-
-  notification[value="translation"] button:not([type="menu"]) > .button-box {
-    margin-inline-end: 3ch;
-  }
-}
-
-.translation-menupopup {
-  -moz-appearance: none;
-}
-
-/* Bookmarks roots menu-items */
-#subscribeToPageMenuitem:not([disabled]),
-#subscribeToPageMenupopup {
-  list-style-image: url("chrome://browser/skin/feeds/feedIcon16.png");
-}
-
-#bookmarksToolbarFolderMenu,
-#BMB_bookmarksToolbar,
-#panelMenu_bookmarksToolbar {
-  list-style-image: url("chrome://browser/skin/places/bookmarksToolbar.png");
-  -moz-image-region: auto;
-}
-
-#menu_unsortedBookmarks,
-#BMB_unsortedBookmarks,
-#panelMenu_unsortedBookmarks {
-  list-style-image: url("chrome://browser/skin/places/unsortedBookmarks.png");
-  -moz-image-region: auto;
-}
-
-/* Status panel */
-
-.statuspanel-label {
-  margin: 0;
-  padding: 2px 4px;
-  background: -moz-dialog;
-  border: 1px none ThreeDShadow;
-  border-top-style: solid;
-  color: -moz-dialogText;
-  text-shadow: none;
-}
-
-@media (-moz-windows-default-theme) {
-  .statuspanel-label {
-    background: linear-gradient(#fff, #ddd);
-    border-color: #ccc;
-    color: #333;
-  }
-}
-
-.statuspanel-label:-moz-locale-dir(ltr):not([mirror]),
-.statuspanel-label:-moz-locale-dir(rtl)[mirror] {
-  border-right-style: solid;
-  /* disabled for triggering grayscale AA (bug 659213)
-  border-top-right-radius: .3em;
-  */
-  margin-right: 1em;
-}
-
-.statuspanel-label:-moz-locale-dir(rtl):not([mirror]),
-.statuspanel-label:-moz-locale-dir(ltr)[mirror] {
-  border-left-style: solid;
-  /* disabled for triggering grayscale AA (bug 659213)
-  border-top-left-radius: .3em;
-  */
-  margin-left: 1em;
-}
-
-%include ../shared/fullscreen/warning.inc.css
-%include ../shared/ctrlTab.inc.css
-%include ../../../devtools/client/themes/responsivedesign.inc.css
-%include ../../../devtools/client/themes/commandline.inc.css
-%include ../shared/plugin-doorhanger.inc.css
-
-notification.pluginVulnerable > .notification-inner > .messageCloseButton {
-  list-style-image: url("chrome://global/skin/icons/close-inverted.png");
-}
-
-@media (min-resolution: 1.1dppx) {
-  notification.pluginVulnerable > .notification-inner > .messageCloseButton {
-    list-style-image: url("chrome://global/skin/icons/close-inverted@2x.png");
-  }
-}
-
-
-%include downloads/indicator.css
-
-/* Error counter */
-
-#developer-toolbar-toolbox-button[error-count]:before {
-  color: #FDF3DE;
-  min-width: 16px;
-  text-shadow: none;
-  background-image: linear-gradient(#B4211B, #8A1915);
-  border-radius: 1px;
-  margin-inline-end: 5px;
-}
-
-/* Customization mode */
-
-%include ../shared/customizableui/customizeMode.inc.css
-
-/**
- * This next rule is a hack to disable subpixel anti-aliasing on all
- * labels during the customize mode transition. Subpixel anti-aliasing
- * on Windows with Direct2D layers acceleration is particularly slow to
- * paint, so this hack is how we sidestep that performance bottleneck.
- */
-#main-window:-moz-any([customize-entering],[customize-exiting]) label {
-  transform: perspective(0.01px);
-}
-
-#main-window[customize-entered] > #tab-view-deck {
-  background-image: url("chrome://browser/skin/customizableui/customizeMode-gridTexture.png");
-  background-attachment: fixed;
-}
-
-#main-window[customization-lwtheme] > #tab-view-deck:-moz-lwtheme {
-  background-repeat: no-repeat;
-  background-position: right top;
-  background-attachment: fixed;
-  /* The image will get set from CustomizeMode.jsm */
-  background-image: none;
-  background-color: transparent;
-}
-
-#main-window[customization-lwtheme]:-moz-lwtheme {
-  background-image: url("chrome://browser/skin/customizableui/customizeMode-gridTexture.png");
-  background-repeat: repeat;
-  background-attachment: fixed;
-  background-position: left top;
-}
-
-#main-window[customize-entered] #browser-bottombox,
-#main-window[customize-entered] #customization-container {
-  border-left: 1px solid @toolbarShadowColor@;
-  border-right: 1px solid @toolbarShadowColor@;
-  background-clip: padding-box;
-}
-
-#main-window[customize-entered] #browser-bottombox {
-  border-bottom: 1px solid @toolbarShadowColor@;
-}
-
-/* End customization mode */
-
-/* Private browsing indicators */
-
-/**
- * Currently, we have two places where we put private browsing indicators on
- * Windows. When tabsintitlebar is enabled, we draw the indicator in the titlebar.
- * When tabsintitlebar is disabled, we draw the indicator at the end of the
- * tabstrip. The titlebar indicator is the fiddliest of the bunch, since we
- * want the bottom border of the image to line up with the bottom of the window
- * caption buttons. That's why there's so much special-casing going on in here.
- */
-.private-browsing-indicator {
-  display: none;
-  pointer-events: none;
-}
-
-#private-browsing-indicator-titlebar {
-  display: block;
-  position: absolute;
-}
-
-#main-window[privatebrowsingmode=temporary][tabsintitlebar] #private-browsing-indicator-titlebar > .private-browsing-indicator {
-  display: block;
-}
-
-#main-window[privatebrowsingmode=temporary]:-moz-any([inFullscreen],:not([tabsintitlebar])) #TabsToolbar > .private-browsing-indicator {
-  display: -moz-box;
-}
-
-#TabsToolbar > .private-browsing-indicator {
-  background: url("chrome://browser/skin/privatebrowsing-mask-tabstrip.png") no-repeat center -3px;
-  margin-inline-start: 4px;
-  width: 48px;
-}
-
-/* Bug 1008183: We're intentionally using the titlebar asset here for fullscreen
- * mode, since the tabstrip "mimics" the titlebar in that case with its own
- * min/max/close window buttons.
- */
-#private-browsing-indicator-titlebar > .private-browsing-indicator,
-#main-window[inFullscreen] #TabsToolbar > .private-browsing-indicator {
-  background: url("chrome://browser/skin/privatebrowsing-mask-titlebar.png") no-repeat center 0px;
-  margin-inline-end: 4px;
-  width: 40px;
-  height: 20px;
-  position: relative;
-}
-
-@media (-moz-windows-classic) {
-  /**
-   * We have to use top instead of background-position in this case, otherwise
-   * the bottom of the indicator would get cut off by the bounds of the
-   * private-browsing-indicator element.
-   */
-  #main-window[sizemode="normal"] > #titlebar > #titlebar-content > #titlebar-buttonbox-container > #private-browsing-indicator-titlebar > .private-browsing-indicator {
-    top: 4px;
-  }
-}
-
-@media (-moz-os-version: windows-win7) {
-  @media (-moz-windows-glass) {
-    #main-window[sizemode="normal"] > #titlebar > #titlebar-content > #titlebar-buttonbox-container > #private-browsing-indicator-titlebar > .private-browsing-indicator {
-      top: 1px;
-    }
-    #main-window[sizemode="maximized"] > #titlebar > #titlebar-content > #titlebar-buttonbox-container > #private-browsing-indicator-titlebar > .private-browsing-indicator {
-      top: -1px;
-    }
-  }
-
-  /**
-   * This next block targets Aero Basic, which has different positioning for the
-   * window caption buttons, and therefore needs to be special-cased.
-   */
-  @media (-moz-windows-default-theme) {
-    @media not all and (-moz-windows-compositor) {
-      #main-window[sizemode="normal"] > #titlebar > #titlebar-content > #titlebar-buttonbox-container > #private-browsing-indicator-titlebar > .private-browsing-indicator {
-        background-image: url("chrome://browser/skin/privatebrowsing-mask-titlebar-win7-tall.png");
-        height: 28px;
-      }
-    }
-  }
-}
-
-/* End private browsing indicators */
-
-%include ../shared/contextmenu.inc.css
-
-#context-navigation {
-  background-color: menu;
-  padding-bottom: 4px;
-}
-
-#context-sep-navigation {
-  margin-inline-start: -28px;
-  margin-top: -4px;
-}
-
-%include browser-aero.css
-
-.browser-extension-panel > .panel-arrowcontainer > .panel-arrowcontent {
-  padding: 0;
-  overflow: hidden;
-}
-
-@media (-moz-os-version: windows-win7) {
-  .cui-widget-panelview[id^=PanelUI-webext-] {
-    border-radius: 4px;
-  }
-}
-
-.webextension-popup-browser {
-  border-radius: inherit;
-}
-
-.contentSelectDropdown-ingroup > .menu-iconic-text {
-  padding-inline-start: 20px;
-}
-
-#ContentSelectDropdown > menupopup {
-  background-color: -moz-field;
-  -moz-border-top-colors: GrayText;
-  -moz-border-right-colors: GrayText;
-  -moz-border-bottom-colors: GrayText;
-  -moz-border-left-colors: GrayText;
-}
-
-#ContentSelectDropdown > menupopup > menucaption,
-#ContentSelectDropdown > menupopup > menuitem {
-  padding: 0 6px;
-  border-width: 0;
-  font: -moz-list;
-}
-
-#ContentSelectDropdown > menupopup > menucaption > .menu-iconic-text,
-#ContentSelectDropdown > menupopup > menuitem > .menu-iconic-text {
-  /* Padding should follow the 4/12 ratio, where 12px is the default font-size
-     with 4px being the preferred padding size. */
-  padding-top: .3333em;
-  padding-bottom: .3333em;
-}
-
-#ContentSelectDropdown > menupopup > menucaption > .menu-iconic-text {
-  font-weight: bold;
-}
-
-#ContentSelectDropdown > menupopup > menuitem[_moz-menuactive="true"][disabled="true"] {
-  color: GrayText;
-  background-color: unset;
-}
-
-#ContentSelectDropdown > menupopup > menucaption {
-  background-color: buttonface;
-}
-
-#ContentSelectDropdown > menupopup > menucaption[disabled="true"] {
-  color: GrayText;
-}
-
-#ContentSelectDropdown > .isOpenedViaTouch > menucaption > .menu-iconic-text,
-#ContentSelectDropdown > .isOpenedViaTouch > menuitem > .menu-iconic-text {
-  /* Touch padding should follow the 11/12 ratio, where 12px is the default
-     font-size with 11px being the preferred padding size. */
-  padding-top: .9167em;
-  padding-bottom: .9167em;
-}
diff --git a/browser/themes/windows/caption-buttons.svg b/browser/themes/windows/caption-buttons.svg
deleted file mode 100644
index 9cb42d539..000000000
--- a/browser/themes/windows/caption-buttons.svg
+++ /dev/null
@@ -1,121 +0,0 @@
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-<!-- This Source Code Form is subject to the terms of the Mozilla Public
-   - License, v. 2.0. If a copy of the MPL was not distributed with this
-   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
-  <style>
-    g {
-      stroke: ButtonText;
-      stroke-width: 0.9px;
-      fill: none;
-    }
-
-    g:not(:target) {
-      display: none;
-    }
-
-    use:target > g {
-      display: initial;
-    }
-
-    .highlight > g {
-      stroke: HighlightText;
-    }
-
-    .inactive > g {
-      stroke: black;
-    }
-    
-    .bolder {
-      stroke-width: 1.6px;
-      stroke: black;
-    }
-    
-    .outline  {
-      stroke-width: 4px;
-      stroke: white;
-      opacity: 0.75;
-    }
-    
-    .inverted  {
-      stroke-width: 1.6px;
-      stroke: white;
-    }
-
-    .outline-inverted  {
-      stroke-width: 4px;
-      stroke: black;
-      opacity: 0.75;
-    }
-    
-    .outline-thinner {
-      stroke-width: 3.6px;
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-  <g id="minimize">
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-    <line x1="11" y1="1" x2="1" y2="11" stroke-linecap="round" class="outline"/>
-    <line x1="1" y1="1" x2="11" y2="11" class="bolder"/>
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-  <g id="restore-outline-inverted">
-    <rect x="1.5" y="3.5" width="7" height="7" stroke-linecap="round" class="outline-inverted"/>
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-    <polyline points="3.5,3.5 3.5,1.5 10.5,1.5 10.5,8.5 8.5,8.5" class="inverted"/>
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-  
-  <use id="close-highlight" class="highlight" xlink:href="#close"/>
-  <use id="maximize-highlight" class="highlight" xlink:href="#maximize"/>
-  <use id="minimize-highlight" class="highlight" xlink:href="#minimize"/>
-  <use id="restore-highlight" class="highlight" xlink:href="#restore"/>
-  <use id="close-inactive" class="inactive" xlink:href="#close"/>
-  <use id="maximize-inactive" class="inactive" xlink:href="#maximize"/>
-  <use id="minimize-inactive" class="inactive" xlink:href="#minimize"/>
-  <use id="restore-inactive" class="inactive" xlink:href="#restore"/>
-</svg>
diff --git a/browser/themes/windows/click-to-play-warning-stripes.png b/browser/themes/windows/click-to-play-warning-stripes.png
deleted file mode 100644
index cb4b71e50..000000000
--- a/browser/themes/windows/click-to-play-warning-stripes.png
+++ /dev/null
diff --git a/browser/themes/windows/communicator/communicator.css b/browser/themes/windows/communicator/communicator.css
deleted file mode 100644
index 0b57574fd..000000000
--- a/browser/themes/windows/communicator/communicator.css
+++ /dev/null
@@ -1,6 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-@import url("chrome://global/skin/");
-
diff --git a/browser/themes/windows/communicator/jar.mn b/browser/themes/windows/communicator/jar.mn
deleted file mode 100644
index dfd20c523..000000000
--- a/browser/themes/windows/communicator/jar.mn
+++ /dev/null
@@ -1,7 +0,0 @@
-# This Source Code Form is subject to the terms of the Mozilla Public
-# License, v. 2.0. If a copy of the MPL was not distributed with this
-# file, You can obtain one at http://mozilla.org/MPL/2.0/.
-
-browser.jar:
-% skin communicator classic/1.0 %skin/classic/communicator/
-        skin/classic/communicator/communicator.css
diff --git a/browser/themes/windows/communicator/moz.build b/browser/themes/windows/communicator/moz.build
deleted file mode 100644
index eb4454d28..000000000
--- a/browser/themes/windows/communicator/moz.build
+++ /dev/null
@@ -1,7 +0,0 @@
-# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
-# vim: set filetype=python:
-# This Source Code Form is subject to the terms of the Mozilla Public
-# License, v. 2.0. If a copy of the MPL was not distributed with this
-# file, You can obtain one at http://mozilla.org/MPL/2.0/.
-
-JAR_MANIFESTS += ['jar.mn']
\ No newline at end of file
diff --git a/browser/themes/windows/content-contextmenu.svg b/browser/themes/windows/content-contextmenu.svg
deleted file mode 100644
index b72b24708..000000000
--- a/browser/themes/windows/content-contextmenu.svg
+++ /dev/null
@@ -1,46 +0,0 @@
-<?xml version="1.0"?>
-<!-- This Source Code Form is subject to the terms of the Mozilla Public
-   - License, v. 2.0. If a copy of the MPL was not distributed with this
-   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
-<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" viewBox="0 0 16 16">
-  <style>
-    use:not(:target) {
-      display: none;
-    }
-    use {
-      fill: menutext;
-    }
-    use[id$="-active"] {
-      fill: -moz-menuhovertext;
-    }
-    use[id$="-disabled"] {
-      fill: graytext;
-    }
-  </style>
-  <defs>
-    <path id="back-shape" fill-rule="evenodd" d="M1.192,8.893L2.21,9.964c0.064,0.065,0.136,0.117,0.214,0.159 l5.199,5.301c0.607,0.63,1.465,0.764,1.915,0.297l1.02-1.082c0.449-0.467,0.32-1.357-0.288-1.99l-2.116-2.158h5.705 c0.671,0,1.215-0.544,1.215-1.215v-2.43c0-0.671-0.544-1.215-1.215-1.215H8.094l2.271-2.309c0.609-0.626,0.737-1.512,0.288-1.974 L9.635,0.278C9.184-0.188,8.327-0.055,7.718,0.575L2.479,5.901C2.38,5.946,2.289,6.008,2.21,6.089L1.192,7.171 c-0.21,0.219-0.293,0.53-0.26,0.864C0.899,8.367,0.981,8.676,1.192,8.893z"/>
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-  <use id="forward-active" xlink:href="#forward-shape"/>
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-  <use id="reload-active" xlink:href="#reload-shape"/>
-  <use id="reload-disabled" xlink:href="#reload-shape"/>
-  <use id="stop" xlink:href="#stop-shape"/>
-  <use id="stop-active" xlink:href="#stop-shape"/>
-  <use id="stop-disabled" xlink:href="#stop-shape"/>
-  <use id="bookmark" xlink:href="#bookmark-shape"/>
-  <use id="bookmark-active" xlink:href="#bookmark-shape"/>
-  <use id="bookmark-disabled" xlink:href="#bookmark-shape"/>
-  <use id="bookmarked" xlink:href="#bookmarked-shape"/>
-  <use id="bookmarked-active" xlink:href="#bookmarked-shape"/>
-  <use id="bookmarked-disabled" xlink:href="#bookmarked-shape"/>
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diff --git a/browser/themes/windows/controlcenter/panel.css b/browser/themes/windows/controlcenter/panel.css
deleted file mode 100644
index fab9aa3a4..000000000
--- a/browser/themes/windows/controlcenter/panel.css
+++ /dev/null
@@ -1,13 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-%include ../../shared/controlcenter/panel.inc.css
-
-.identity-popup-expander:-moz-focusring {
-  padding: 1px;
-}
-
-.identity-popup-expander:-moz-focusring > .button-box {
-  outline: 1px -moz-dialogtext dotted;
-}
diff --git a/browser/themes/windows/customizableui/background-noise-toolbar.png b/browser/themes/windows/customizableui/background-noise-toolbar.png
deleted file mode 100644
index d09ba9daf..000000000
--- a/browser/themes/windows/customizableui/background-noise-toolbar.png
+++ /dev/null
diff --git a/browser/themes/windows/customizableui/customize-titleBar-toggle.png b/browser/themes/windows/customizableui/customize-titleBar-toggle.png
deleted file mode 100644
index 3cf9f163d..000000000
--- a/browser/themes/windows/customizableui/customize-titleBar-toggle.png
+++ /dev/null
diff --git a/browser/themes/windows/customizableui/customize-titleBar-toggle@2x.png b/browser/themes/windows/customizableui/customize-titleBar-toggle@2x.png
deleted file mode 100644
index 8e1beaec5..000000000
--- a/browser/themes/windows/customizableui/customize-titleBar-toggle@2x.png
+++ /dev/null
diff --git a/browser/themes/windows/customizableui/customizeMode-gridTexture.png b/browser/themes/windows/customizableui/customizeMode-gridTexture.png
deleted file mode 100644
index ca6c1196c..000000000
--- a/browser/themes/windows/customizableui/customizeMode-gridTexture.png
+++ /dev/null
diff --git a/browser/themes/windows/customizableui/customizeMode-separatorHorizontal.png b/browser/themes/windows/customizableui/customizeMode-separatorHorizontal.png
deleted file mode 100644
index 5e17cb4db..000000000
--- a/browser/themes/windows/customizableui/customizeMode-separatorHorizontal.png
+++ /dev/null
diff --git a/browser/themes/windows/customizableui/customizeMode-separatorVertical.png b/browser/themes/windows/customizableui/customizeMode-separatorVertical.png
deleted file mode 100644
index dc4caee81..000000000
--- a/browser/themes/windows/customizableui/customizeMode-separatorVertical.png
+++ /dev/null
diff --git a/browser/themes/windows/customizableui/menu-arrow.svg b/browser/themes/windows/customizableui/menu-arrow.svg
deleted file mode 100644
index 8437779fd..000000000
--- a/browser/themes/windows/customizableui/menu-arrow.svg
+++ /dev/null
@@ -1,26 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!-- This Source Code Form is subject to the terms of the Mozilla Public
-   - License, v. 2.0. If a copy of the MPL was not distributed with this
-   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
-<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" height="16" width="16" viewBox="0 0 16 16">
-  <style>
-    use:not(:target) {
-      display: none;
-    }
-    use {
-      fill: MenuText;
-    }
-    use[id$="-disabled"] {
-      fill: GrayText;
-    }
-    use[id$="-hover"] {
-      fill: HighlightText;
-    }
-  </style>
-  <defs>
-    <path id="arrow-shape" d="m 6,4 0,8 5,-4 z"/>
-  </defs>
-  <use id="arrow" xlink:href="#arrow-shape"/>
-  <use id="arrow-disabled" xlink:href="#arrow-shape"/>
-  <use id="arrow-hover" xlink:href="#arrow-shape"/>
-</svg>
diff --git a/browser/themes/windows/customizableui/panelUI.css b/browser/themes/windows/customizableui/panelUI.css
deleted file mode 100644
index a01a2f3e3..000000000
--- a/browser/themes/windows/customizableui/panelUI.css
+++ /dev/null
@@ -1,139 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-%include ../../shared/customizableui/panelUI.inc.css
-
-.panel-subviews {
-  background-color: var(--arrowpanel-background);
-}
-
-#PanelUI-contents #zoom-out-btn {
-  padding-left: 12px;
-  padding-right: 12px;
-}
-
-#PanelUI-contents #zoom-in-btn {
-  padding-left: 12px;
-  padding-right: 12px;
-}
-
-/* bookmark panel submenus */
-
-#BMB_bookmarksPopup menupopup[placespopup=true] {
-  -moz-appearance: none;
-  background: transparent;
-  border: none;
-  padding: 6px;
-}
-
-#BMB_bookmarksPopup menupopup[placespopup=true] > hbox {
-  /* emulating chrome://browser/content/places/menu.xml#places-popup-arrow but without the arrow */
-  box-shadow: 0 0 4px rgba(0,0,0,0.2);
-  background: var(--arrowpanel-background);
-  color: var(--arrowpanel-color);
-  border: 1px solid var(--arrowpanel-border-color);
-  border-radius: 3.5px;
-  margin-top: -4px;
-}
-
-#BMB_bookmarksPopup menupopup {
-  padding-top: 2px;
-}
-
-/* Add some space at the top because there are no headers: */
-#BMB_bookmarksPopup menupopup[placespopup=true] > hbox > .popup-internal-box > .arrowscrollbox-scrollbox > .scrollbox-innerbox  {
-  padding-top: 4px;
-}
-
-/* bookmark panel separator */
-#BMB_bookmarksPopup menuseparator {
-  padding-top: 0;
-  padding-bottom: 0;
-}
-
-.subviewbutton > .menu-right,
-.subviewbutton > .menu-iconic-left {
-  padding-top: 1px;
-  margin-top: 1px;
-  margin-bottom: 2px;
-}
-
-/* Disabled empty item looks too small otherwise, because it has no icon. */
-menuitem.subviewbutton[disabled]:not(.menuitem-iconic),
-/* Same for checkbox menu items, whose icons lose size due to -moz-appearance: none: */
-menuitem[type="checkbox"].subviewbutton {
-  /* This is 16px for an icon + 3px for its margins + 1px for its padding +
-   * 2px for its border, see above */
-  min-height: 22px;
-}
-
-.subviewbutton > .toolbarbutton-text {
-  padding-top: 3px;
-  padding-bottom: 3px;
-}
-
-.widget-overflow-list .toolbarbutton-1 > .toolbarbutton-menubutton-button {
-  -moz-appearance: none;
-  border: 0;
-  margin-inline-start: 3px;
-}
-
-.widget-overflow-list .toolbarbutton-1 > .toolbarbutton-menubutton-dropmarker {
-  padding: 0 2px;
-  padding-inline-start: 0;
-  height: 18px;
-}
-
-.widget-overflow-list .toolbarbutton-1 > .toolbarbutton-menubutton-dropmarker > .dropmarker-icon {
-  padding: 0 6px;
-}
-
-.subviewbutton > .toolbarbutton-text {
-  padding-inline-start: 16px;
-}
-
-.subviewbutton:-moz-any([image],[targetURI],.cui-withicon, .restoreallitem, .bookmark-item) > .toolbarbutton-text {
-  padding-inline-start: 0;
-}
-
-.subviewbutton:-moz-any([image],[targetURI],.cui-withicon, .restoreallitem, .bookmark-item)[checked="true"] > .toolbarbutton-icon {
-  visibility: hidden;
-}
-
-menu.subviewbutton > .menu-right {
-  -moz-appearance: none;
-  list-style-image: url(chrome://browser/skin/customizableui/menu-arrow.svg#arrow);
-  /* Reset the rect we inherit from the button: */
-  -moz-image-region: auto;
-}
-
-menu[disabled="true"].subviewbutton > .menu-right {
-  list-style-image: url(chrome://browser/skin/customizableui/menu-arrow.svg#arrow-disabled);
-}
-
-@media not all and (-moz-windows-default-theme) {
-  menu[_moz-menuactive].subviewbutton > .menu-right {
-    list-style-image: url(chrome://browser/skin/customizableui/menu-arrow.svg#arrow-hover);
-  }
-}
-
-menu.subviewbutton > .menu-right:-moz-locale-dir(rtl) {
-  transform: scaleX(-1);
-}
-
-/* Win8 and beyond. */
-@media not all and (-moz-os-version: windows-win7) {
-  panelview .toolbarbutton-1,
-  .subviewbutton,
-  .widget-overflow-list .toolbarbutton-1,
-  .panelUI-grid .toolbarbutton-1 > .toolbarbutton-menubutton-button,
-  #BMB_bookmarksPopup menupopup[placespopup=true] > hbox,
-  #edit-controls@inAnyPanel@,
-  #zoom-controls@inAnyPanel@,
-  #edit-controls@inAnyPanel@ > toolbarbutton,
-  #zoom-controls@inAnyPanel@ > toolbarbutton {
-    border-radius: 0;
-  }
-}
-
diff --git a/browser/themes/windows/devedition.css b/browser/themes/windows/devedition.css
deleted file mode 100644
index bdf4bb80e..000000000
--- a/browser/themes/windows/devedition.css
+++ /dev/null
@@ -1,316 +0,0 @@
-% This Source Code Form is subject to the terms of the Mozilla Public
-% License, v. 2.0. If a copy of the MPL was not distributed with this
-% file, You can obtain one at http://mozilla.org/MPL/2.0/.
-
-%include ../shared/devedition.inc.css
-
-:root {
-  --forwardbutton-width: 29px;
-}
-
-:root[devtoolstheme="dark"],
-:root[devtoolstheme="light"] {
-   /* Matches the #browser-border-start, #browser-border-end color */
-  --chrome-nav-bar-separator-color: rgba(10, 31, 51, 0.35);
-}
-
-/* The window background is white due to no accentcolor in the lightweight
-   theme. It can't be changed to transparent when there is no compositor
-   (Win 7 in classic / basic theme), or else dragging and focus become
-   broken. So instead just show the normal titlebar in that case, and override
-   the window color as transparent when the compositor is available. */
-@media not all and (-moz-windows-compositor) {
-  #main-window[tabsintitlebar] #titlebar:-moz-lwtheme {
-    visibility: visible;
-  }
-
-  #main-window {
-    background: var(--chrome-background-color) !important;
-  }
-}
-
-@media (-moz-windows-compositor) {
-  #main-window {
-    background: transparent !important;
-  }
-}
-
-#TabsToolbar::after {
-  display: none;
-}
-
-#back-button > .toolbarbutton-icon,
-#forward-button > .toolbarbutton-icon {
-  background: var(--chrome-nav-buttons-background) !important;
-  border-radius: 0 !important;
-  height: auto !important;
-  padding: var(--toolbarbutton-vertical-inner-padding) 5px !important;
-  margin: 0 !important;
-  border: 1px solid var(--chrome-nav-bar-controls-border-color) !important;
-  box-shadow: none !important;
-}
-
-#back-button > .toolbarbutton-icon {
-  /* 18px icon + 2 * 5px padding + 2 * 1px border */
-  width: 30px !important;
-}
-
-#forward-button > .toolbarbutton-icon {
-  /* 18px icon + 2 * 5px padding + 1 * 1px border */
-  width: 29px !important;
-}
-
-/* the normal theme adds box-shadow: <stuff> !important when the back-button is [open]. Fix: */
-#back-button[open="true"] > .toolbarbutton-icon {
-  box-shadow: none !important;
-}
-
-#forward-button > .toolbarbutton-icon {
-  border-inline-start: none !important;
-}
-
-/* Override a box shadow for disabled back button */
-#main-window:not([customizing]) #back-button[disabled] > .toolbarbutton-icon {
-  box-shadow: none !important;
-}
-
-/* Override !important properties for hovered back button */
-#main-window #back-button:hover:not([disabled="true"]) > .toolbarbutton-icon,
-#main-window #forward-button:hover:not([disabled="true"]) > .toolbarbutton-icon {
-  background: var(--chrome-nav-buttons-hover-background) !important;
-  box-shadow: none !important;
-}
-
-#back-button > .toolbarbutton-icon {
-  border-radius: 2px 0 0 2px !important;
-}
-
-#nav-bar .toolbarbutton-1:not([type=menu-button]),
-#nav-bar .toolbarbutton-1 > .toolbarbutton-menubutton-button,
-#nav-bar .toolbarbutton-1 > .toolbarbutton-menubutton-dropmarker {
-  padding-top: 2px;
-  padding-bottom: 2px;
-}
-
-.tabbrowser-tab {
-  background-color: var(--tab-background-color);
-}
-
-#toolbar-menubar {
-  text-shadow: none !important;
-}
-
-:root[devtoolstheme="dark"] .findbar-closebutton,
-:root[devtoolstheme="dark"] #sidebar-header > .close-icon,
-/* Tab styling - make sure to use an inverted icon for the selected tab
-   (brighttext only covers the unselected tabs) */
-.tab-close-button[selected=true] {
-  list-style-image: url("chrome://global/skin/icons/close-inverted.png");
-}
-
-@media (min-resolution: 1.1dppx) {
-  :root[devtoolstheme="dark"] .findbar-closebutton,
-  :root[devtoolstheme="dark"] #sidebar-header > .close-icon,
-  .tab-close-button[selected=true] {
-    list-style-image: url("chrome://global/skin/icons/close-inverted@2x.png");
-  }
-}
-
-@media (-moz-os-version: windows-win7),
-       (-moz-os-version: windows-win8) {
-  :root {
-    --space-above-tabbar: 15px;
-  }
-
-  /* It'd be nice if there was an element in the scrollbox's inner content
-     that collapsed to the current width of the tabs. Since there isn't we
-     need to handle overflowing and non-overflowing tabs separately.
-
-     In the case of overflowing tabs, set a border-top on the entire container,
-     otherwise we need to set it on each element individually */
-  #main-window[sizemode=normal] .tabbrowser-tabs[overflow="true"] {
-    background-clip: padding-box;
-    border-top: 1px solid var(--chrome-nav-bar-separator-color);
-    border-inline-end: 1px solid var(--chrome-nav-bar-separator-color);
-    background-color: var(--tab-background-color); /* Make sure there is no transparent gap during tab close animation */
-  }
-
-  /* Add a border to the left of the first tab (or scroll arrow).  Using .tabbrowser-tabs
-     instead of #TabsToolbar because it will work even in customize mode. */
-  #main-window[sizemode=normal] .tabbrowser-tabs {
-    background-clip: padding-box;
-    border-inline-start: 1px solid var(--chrome-nav-bar-separator-color);
-    border-inline-end: 1px solid transparent;
-  }
-
-  #main-window[sizemode=normal] .tabbrowser-tabs:not([overflow="true"]) .tabbrowser-tab,
-  #main-window[sizemode=normal] .tabbrowser-tabs:not([overflow="true"]) .tabbrowser-arrowscrollbox > .scrollbutton-down,
-  #main-window[sizemode=normal] .tabbrowser-tabs:not([overflow="true"]) .tabbrowser-arrowscrollbox > .scrollbutton-up,
-  #main-window[sizemode=normal] .tabbrowser-tabs:not([overflow="true"]) .tabs-newtab-button {
-    background-clip: padding-box;
-    border-top: 1px solid var(--chrome-nav-bar-separator-color);
-  }
-
-  /* Allow the border-top rule to take effect */
-  #main-window[sizemode=normal] .tabbrowser-tabs:not([overflow="true"]) .tabbrowser-tab {
-    -moz-border-top-colors: none;
-  }
-
-  #main-window[sizemode=normal] .tabbrowser-tabs:not([overflow="true"]) .closing-tabs-spacer {
-    background-clip: padding-box;
-    border-inline-start: 1px solid var(--chrome-nav-bar-separator-color);
-  }
-
-  .tabs-newtab-button {
-    background: var(--tab-background-color);
-  }
-
-  /* Use default window colors when in non-maximized mode */
-  #tabbrowser-tabs,
-  #TabsToolbar,
-  #browser-panel,
-  #titlebar-content {
-    background: transparent;
-  }
-
-  /* Ensure that the entire background is styled when maximized/fullscreen */
-  #main-window:not([sizemode="normal"]):not([customizing]) #browser-panel {
-    background: var(--chrome-background-color) !important;
-  }
-
-  /* The menu items need to be visible when the entire background is styled */
-  #main-window:not([sizemode="normal"]) #main-menubar {
-    color: var(--chrome-color);
-    background-color: transparent;
-  }
-
-  #main-window[sizemode="maximized"] #main-menubar > menu:not(:-moz-window-inactive) {
-    color: inherit;
-  }
-
-  /* Use proper menu text styling in Win7 classic mode (copied from browser.css) */
-  @media not all and (-moz-windows-compositor),
-         not all and (-moz-windows-default-theme) {
-    :root[tabsintitlebar]:not([inFullscreen]) {
-      --titlebar-text-color: CaptionText;
-    }
-
-    :root[tabsintitlebar]:not([inFullscreen]):-moz-window-inactive {
-      --titlebar-text-color: InactiveCaptionText;
-    }
-
-    #main-window[tabsintitlebar] #main-menubar > menu {
-      color: inherit;
-    }
-  }
-
-  /* Use less opacity than normal since this is very dark, and on top of the default toolbar color */
-  .tabbrowser-arrowscrollbox > .scrollbutton-up[disabled],
-  .tabbrowser-arrowscrollbox > .scrollbutton-down[disabled] {
-    opacity: .6;
-  }
-
-  /* Override scrollbutton gradients in normal and hover state */
-  .tabbrowser-arrowscrollbox > .scrollbutton-down,
-  .tabbrowser-arrowscrollbox > .scrollbutton-up {
-    background-image: none !important;
-    transition: none; /* scrollbutton-down has an unwanted transition on background color */
-  }
-
-  /* Restore draggable space on the sides of tabs when maximized */
-  #main-window[sizemode="maximized"] .tabbrowser-arrowscrollbox > .arrowscrollbox-scrollbox {
-    padding-left: 15px;
-    padding-right: 15px;
-  }
-
-  /* Override the padding that's intended to compensate for tabs that can overlap border-radius on nav-bar in default theme. */
-  #main-window[sizemode=normal]:not([customizing]) #TabsToolbar {
-    padding-left: 0;
-    padding-right: 0;
-  }
-}
-
-/* Restored windows get an artificial border on windows, because the lwtheme background
- * overlaps the regular window border. That isn't the case for us, so we avoid painting
- * over the native border with our custom borders: */
-#browser-panel {
-  /* These are !important to avoid specificity-wars with the selectors that add borders here. */
-  background-image: none !important;
-  border-top: none !important;
-}
-
-#navigator-toolbox {
-  /* The side borders on the toolbox also look out-of-place because we don't paint over
-   * the native background color at all, and these are !important for the same reason as above. */
-  border-left: none !important;
-  border-right: none !important;
-}
-
-/* Disable dragging like in the default theme: */
-#main-window[tabsintitlebar] #navigator-toolbox > toolbar:not(#toolbar-menubar):not(#TabsToolbar):-moz-lwtheme {
-  -moz-window-dragging: no-drag;
-}
-
-/* The sidebar header has no background now that the background of the #browser-panel
- * has no image and is transparent. Fix: */
-.sidebar-header:-moz-lwtheme,
-#sidebar-header {
-  background-color: var(--chrome-background-color);
-  color: var(--chrome-color);
-}
-
-@media (-moz-os-version: windows-win7),
-       (-moz-os-version: windows-win8) {
-  /* And then we add them back on toolbars so that they don't look borderless: */
-  #main-window:not([customizing])[sizemode=normal] #navigator-toolbox::after,
-  #main-window:not([customizing])[sizemode=normal] #navigator-toolbox > toolbar:not(#toolbar-menubar):not(#TabsToolbar) {
-    border-left: 1px solid hsla(209,67%,12%,0.35);
-    border-right: 1px solid hsla(209,67%,12%,0.35);
-  }
-}
-
-@media (-moz-os-version: windows-win10) {
-  /* Always keep draggable space on the sides of tabs since there is no top margin on Win10 */
-  #main-window .tabbrowser-arrowscrollbox > .arrowscrollbox-scrollbox {
-    padding-left: 15px;
-    padding-right: 15px;
-  }
-
-  /* Force white caption buttons for the dark theme on Windows 10 */
-  :root[devtoolstheme="dark"] #titlebar-min {
-    list-style-image: url(chrome://browser/skin/caption-buttons.svg#minimize-white);
-  }
-  :root[devtoolstheme="dark"] #titlebar-max {
-    list-style-image: url(chrome://browser/skin/caption-buttons.svg#maximize-white);
-  }
-  #main-window[devtoolstheme="dark"][sizemode="maximized"] #titlebar-max {
-    list-style-image: url(chrome://browser/skin/caption-buttons.svg#restore-white);
-  }
-  :root[devtoolstheme="dark"] #titlebar-close {
-    list-style-image: url(chrome://browser/skin/caption-buttons.svg#close-white);
-  }
-
-  /* ... and normal ones for the light theme on Windows 10 */
-  :root[devtoolstheme="light"] #titlebar-min {
-    list-style-image: url(chrome://browser/skin/caption-buttons.svg#minimize);
-  }
-  :root[devtoolstheme="light"] #titlebar-max {
-    list-style-image: url(chrome://browser/skin/caption-buttons.svg#maximize);
-  }
-  #main-window[devtoolstheme="light"][sizemode="maximized"] #titlebar-max {
-    list-style-image: url(chrome://browser/skin/caption-buttons.svg#restore);
-  }
-  :root[devtoolstheme="light"] #titlebar-close {
-    list-style-image: url(chrome://browser/skin/caption-buttons.svg#close);
-  }
-
-  :root[devtoolstheme="light"] #titlebar-close:hover {
-    list-style-image: url(chrome://browser/skin/caption-buttons.svg#close-white);
-  }
-}
-
-.ac-type-icon {
-  /* Left-align the type icon in awesomebar popup results with the icon in the
-     urlbar. */
-  margin-inline-start: 13px;
-}
diff --git a/browser/themes/windows/downloads/allDownloadsViewOverlay.css b/browser/themes/windows/downloads/allDownloadsViewOverlay.css
deleted file mode 100644
index 0ee83f669..000000000
--- a/browser/themes/windows/downloads/allDownloadsViewOverlay.css
+++ /dev/null
@@ -1,47 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-%include ../../shared/downloads/allDownloadsViewOverlay.inc.css
-
-/*** List items ***/
-
-:root {
-  --downloads-item-height: 6em;
-}
-
-@media (-moz-windows-default-theme) {
-  .downloadProgress > .progress-bar {
-    background-color: #3c9af8;
-  }
-}
-
-/*** Highlighted list items ***/
-
-@media (-moz-windows-default-theme) {
-  /*
-  -moz-appearance: menuitem is almost right, but the hover effect is not
-  transparent and is lighter than desired.
-
-  Copied from the autocomplete richlistbox styling in
-  toolkit/themes/windows/global/autocomplete.css
-
-  This styling should be kept in sync with the style from the above file.
-  */
-  @itemFocused@ {
-    color: inherit;
-    background-color: transparent;
-    /* four gradients for the bevel highlights on each edge, one for blue background */
-    background-image:
-      linear-gradient(to bottom, rgba(255,255,255,0.9) 3px, transparent 3px),
-      linear-gradient(to right, rgba(255,255,255,0.5) 3px, transparent 3px),
-      linear-gradient(to left, rgba(255,255,255,0.5) 3px, transparent 3px),
-      linear-gradient(to top, rgba(255,255,255,0.4) 3px, transparent 3px),
-      linear-gradient(to bottom, rgba(163,196,247,0.3), rgba(122,180,246,0.3));
-    background-clip: content-box;
-    border-radius: 6px;
-    outline: 1px solid rgb(124,163,206);
-    -moz-outline-radius: 3px;
-    outline-offset: -2px;
-  }
-}
diff --git a/browser/themes/windows/downloads/download-glow-menuPanel-win7.png b/browser/themes/windows/downloads/download-glow-menuPanel-win7.png
deleted file mode 100644
index 7ff7e6a03..000000000
--- a/browser/themes/windows/downloads/download-glow-menuPanel-win7.png
+++ /dev/null
diff --git a/browser/themes/windows/downloads/download-glow-menuPanel.png b/browser/themes/windows/downloads/download-glow-menuPanel.png
deleted file mode 100644
index d05b07b57..000000000
--- a/browser/themes/windows/downloads/download-glow-menuPanel.png
+++ /dev/null
diff --git a/browser/themes/windows/downloads/download-glow-win7.png b/browser/themes/windows/downloads/download-glow-win7.png
deleted file mode 100644
index e7415e83d..000000000
--- a/browser/themes/windows/downloads/download-glow-win7.png
+++ /dev/null
diff --git a/browser/themes/windows/downloads/download-glow.png b/browser/themes/windows/downloads/download-glow.png
deleted file mode 100644
index 1239ada52..000000000
--- a/browser/themes/windows/downloads/download-glow.png
+++ /dev/null
diff --git a/browser/themes/windows/downloads/download-notification-finish.png b/browser/themes/windows/downloads/download-notification-finish.png
deleted file mode 100644
index 2ef1420ad..000000000
--- a/browser/themes/windows/downloads/download-notification-finish.png
+++ /dev/null
diff --git a/browser/themes/windows/downloads/download-notification-start.png b/browser/themes/windows/downloads/download-notification-start.png
deleted file mode 100644
index a2fca743b..000000000
--- a/browser/themes/windows/downloads/download-notification-start.png
+++ /dev/null
diff --git a/browser/themes/windows/downloads/downloads.css b/browser/themes/windows/downloads/downloads.css
deleted file mode 100644
index 4b60da149..000000000
--- a/browser/themes/windows/downloads/downloads.css
+++ /dev/null
@@ -1,56 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-%include ../../shared/downloads/downloads.inc.css
-
-/*** Panel and outer controls ***/
-
-@keyfocus@ #downloadsSummary:focus,
-@keyfocus@ .downloadsPanelFooterButton:focus {
-  outline: 1px -moz-dialogtext dotted;
-  outline-offset: -1px;
-}
-
-@keyfocus@ #downloadsSummary:focus {
-  outline-offset: -5px;
-}
-
-/*** List items and similar elements in the summary ***/
-
-:root {
-  --downloads-item-height: 5.5em;
-  --downloads-item-font-size-factor: 0.9;
-  --downloads-item-details-opacity: 0.6;
-}
-
-.downloadButton > .button-box {
-  border: 1px solid transparent;
-}
-
-@keyfocus@ .downloadButton:focus > .button-box {
-  border: 1px dotted ThreeDDarkShadow;
-}
-
-@media (-moz-windows-default-theme) {
-  @item@[verdict="Malware"] {
-    color: #aa1b08;
-  }
-
-  /* Use unified color for the progressbar on default theme */
-  .downloadProgress > .progress-bar {
-    background-color: #3c9af8;
-  }
-
-  .downloadProgress[paused="true"] > .progress-bar {
-    background-color: #a6a6a6;
-  }
-
-}
-
-/*** Highlighted list items ***/
-
-@keyfocus@ @itemFocused@ {
-  outline: 1px -moz-dialogtext dotted;
-  outline-offset: -1px;
-}
diff --git a/browser/themes/windows/downloads/indicator.css b/browser/themes/windows/downloads/indicator.css
deleted file mode 100644
index 7f921f8de..000000000
--- a/browser/themes/windows/downloads/indicator.css
+++ /dev/null
@@ -1,221 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-/*** Status and progress indicator ***/
-
-#downloads-animation-container {
-  min-height: 1px;
-  min-width: 1px;
-  height: 1px;
-  margin-bottom: -1px;
-  /* Makes the outermost animation container element positioned, so that its
-     contents are rendered over the main browser window in the Z order.
-     This is required by the animated event notification. */
-  position: relative;
-  /* The selected tab may overlap #downloads-indicator-notification */
-  z-index: 5;
-}
-
-/*** Main indicator icon ***/
-
-@media not all and (min-resolution: 1.1dppx) {
-  #downloads-button {
-    --downloads-indicator-icon: -moz-image-rect(url("chrome://browser/skin/Toolbar.png"), 0, 198, 18, 180);
-    --downloads-indicator-icon-attention: -moz-image-rect(url("chrome://browser/skin/Toolbar.png"), 18, 198, 36, 180);
-    --downloads-indicator-icon-inverted: -moz-image-rect(url("chrome://browser/skin/Toolbar-inverted.png"), 0, 198, 18, 180);
-    --downloads-indicator-icon-attention-inverted: -moz-image-rect(url("chrome://browser/skin/Toolbar-inverted.png"), 18, 198, 36, 180);
-  }
-}
-
-@media (min-resolution: 1.1dppx) {
-  #downloads-button {
-    --downloads-indicator-icon: -moz-image-rect(url("chrome://browser/skin/Toolbar@2x.png"), 0, 396, 36, 360);
-    --downloads-indicator-icon-attention: -moz-image-rect(url("chrome://browser/skin/Toolbar@2x.png"), 36, 396, 72, 360);
-    --downloads-indicator-icon-inverted: -moz-image-rect(url("chrome://browser/skin/Toolbar-inverted@2x.png"), 0, 396, 36, 360);
-    --downloads-indicator-icon-attention-inverted: -moz-image-rect(url("chrome://browser/skin/Toolbar-inverted@2x.png"), 36, 396, 72, 360);
-  }
-}
-
-#downloads-indicator-icon {
-  background: var(--downloads-indicator-icon) center no-repeat;
-  width: 18px;
-  height: 18px;
-  background-size: 18px;
-}
-
-toolbar[brighttext] #downloads-button:not([attention="success"]) > #downloads-indicator-anchor > #downloads-indicator-icon {
-  background-image: var(--downloads-indicator-icon-inverted);
-}
-
-#downloads-button[attention="warning"] > .toolbarbutton-badge-stack > .toolbarbutton-badge,
-#downloads-button[attention="severe"] > .toolbarbutton-badge-stack > .toolbarbutton-badge {
-  display: -moz-box;
-  height: 8px;
-  width: 8px;
-  min-width: 0;
-  border-radius: 50%;
-  /* "!important" is necessary to override the rule in toolbarbutton.css */
-  margin-top: -1px !important;
-  margin-right: -2px !important;
-}
-
-#downloads-button[cui-areatype="toolbar"] > .toolbarbutton-badge-stack > .toolbarbutton-badge {
-  height: 7px;
-  width: 7px;
-}
-
-#downloads-button[attention="severe"] > .toolbarbutton-badge-stack > .toolbarbutton-badge {
-  background: #D90000;
-}
-
-#downloads-button[attention="warning"] > .toolbarbutton-badge-stack > .toolbarbutton-badge {
-  background: #FFBF00;
-}
-
-#downloads-button[attention="severe"] > .toolbarbutton-badge-stack > .toolbarbutton-badge:-moz-window-inactive,
-#downloads-button[attention="warning"] > .toolbarbutton-badge-stack > .toolbarbutton-badge:-moz-window-inactive {
-  filter: none;
-}
-
-#downloads-button[attention="success"] > #downloads-indicator-anchor > #downloads-indicator-icon {
-  background-image: var(--downloads-indicator-icon-attention);
-}
-
-toolbar[brighttext] #downloads-button[attention="success"] > #downloads-indicator-anchor > #downloads-indicator-icon {
-  background-image: var(--downloads-indicator-icon-attention-inverted);
-}
-
-#downloads-button[cui-areatype="menu-panel"][attention="success"] {
-  list-style-image: url("chrome://browser/skin/downloads/download-glow-menuPanel.png");
-  -moz-image-region: auto;
-}
-
-/* In the next few rules, we use :not([counter]) as a shortcut that is
-   equivalent to -moz-any([progress], [paused]). */
-
-#downloads-button:not([counter]) > #downloads-indicator-anchor > #downloads-indicator-progress-area > #downloads-indicator-counter {
-  background: var(--downloads-indicator-icon) center no-repeat;
-  background-size: 12px;
-}
-
-toolbar[brighttext] #downloads-button:not([counter]):not([attention="success"]) > #downloads-indicator-anchor > #downloads-button-progress-area > #downloads-indicator-counter {
-  background-image: var(--downloads-indicator-icon-inverted);
-}
-
-#downloads-button:not([counter])[attention="success"] > #downloads-indicator-anchor > #downloads-indicator-progress-area > #downloads-indicator-counter {
-  background-image: var(--downloads-indicator-icon-attention);
-}
-
-toolbar[brighttext] #downloads-button:not([counter])[attention="success"] > #downloads-indicator-anchor > #downloads-indicator-progress-area > #downloads-indicator-counter {
-  background-image: var(--downloads-indicator-icon-attention-inverted);
-}
-
-/*** Download notifications ***/
-
-#downloads-indicator-notification {
-  opacity: 0;
-  background-size: 16px;
-  background-position: center;
-  background-repeat: no-repeat;
-  width: 16px;
-  height: 16px;
-}
-
-@keyframes downloadsIndicatorNotificationStartRight {
-  from { opacity: 0; transform: translate(-128px, 128px) scale(8); }
-  20%  { opacity: .85; animation-timing-function: ease-out; }
-  to   { opacity: 0; transform: translate(0) scale(1); }
-}
-
-@keyframes downloadsIndicatorNotificationStartLeft {
-  from { opacity: 0; transform: translate(128px, 128px) scale(8); }
-  20%  { opacity: .85; animation-timing-function: ease-out; }
-  to   { opacity: 0; transform: translate(0) scale(1); }
-}
-
-#downloads-notification-anchor[notification="start"] > #downloads-indicator-notification {
-  background-image: url("chrome://browser/skin/downloads/download-notification-start.png");
-  animation-name: downloadsIndicatorNotificationStartRight;
-  animation-duration: 1s;
-}
-
-#downloads-notification-anchor[notification="start"]:-moz-locale-dir(rtl) > #downloads-indicator-notification {
-  animation-name: downloadsIndicatorNotificationStartLeft;
-}
-
-@keyframes downloadsIndicatorNotificationFinish {
-  from { opacity: 0; transform: scale(1); }
-  20%  { opacity: .65; animation-timing-function: ease-in; }
-  to   { opacity: 0; transform: scale(8); }
-}
-
-#downloads-notification-anchor[notification="finish"] > #downloads-indicator-notification {
-  background-image: url("chrome://browser/skin/downloads/download-notification-finish.png");
-  animation-name: downloadsIndicatorNotificationFinish;
-  animation-duration: 1s;
-}
-
-/*** Progress bar and text ***/
-
-#downloads-indicator-counter {
-  height: 9px;
-  margin: -3px 0px 0px 0px;
-  color: hsl(0,0%,30%);
-  text-shadow: hsla(0,0%,100%,.5) 0 1px;
-  font-size: 9px;
-  line-height: 9px;
-  text-align: center;
-
-  /* Bug 812345 added this... */
-  margin-bottom: -1px;
-}
-
-toolbar[brighttext] #downloads-indicator-counter {
-  color: white;
-  text-shadow: 0 0 1px rgba(0,0,0,.7),
-               0 1px 1.5px rgba(0,0,0,.5);
-}
-
-#downloads-indicator-progress {
-  width: 16px;
-  height: 5px;
-  min-width: 0;
-  min-height: 0;
-  margin-top: 1px;
-  margin-bottom: 2px;
-  border-radius: 2px;
-  box-shadow: 0 1px 0 hsla(0,0%,100%,.4);
-}
-
-#downloads-indicator-progress > .progress-bar {
-  -moz-appearance: none;
-  min-width: 0;
-  min-height: 0;
-  /* The background-clip: border-box; and background-image: none; are there to expand the background-color behind the border */
-  background-clip: padding-box, border-box;
-  background-color: rgb(90, 201, 66);
-  background-image: linear-gradient(transparent 1px, rgba(255, 255, 255, 0.4) 1px, rgba(255, 255, 255, 0.4) 2px, transparent 2px), none;
-  border: 1px solid;
-  border-color: rgba(0,43,86,.6) rgba(0,43,86,.4) rgba(0,43,86,.4);
-  border-radius: 2px 0 0 2px;
-}
-
-#downloads-indicator-progress > .progress-remainder {
-  -moz-appearance: none;
-  min-width: 0;
-  min-height: 0;
-  background-image: linear-gradient(#505050, #575757);
-  border: 1px solid;
-  border-color: hsla(0,0%,0%,.6) hsla(0,0%,0%,.4) hsla(0,0%,0%,.4);
-  border-inline-start: none;
-  border-radius: 0 2px 2px 0;
-}
-
-#downloads-button[paused] > #downloads-indicator-anchor > #downloads-indicator-progress-area > #downloads-indicator-progress > .progress-bar {
-  background-color: rgb(220, 230, 81);
-}
-
-#downloads-button[paused] > #downloads-indicator-anchor > #downloads-indicator-progress-area > #downloads-indicator-progress > .progress-remainder {
-  background-image: linear-gradient(#4b5000, #515700);
-}
diff --git a/browser/themes/windows/feeds/feedIcon.png b/browser/themes/windows/feeds/feedIcon.png
deleted file mode 100644
index 59b22d8a2..000000000
--- a/browser/themes/windows/feeds/feedIcon.png
+++ /dev/null
diff --git a/browser/themes/windows/feeds/feedIcon16.png b/browser/themes/windows/feeds/feedIcon16.png
deleted file mode 100644
index 071979903..000000000
--- a/browser/themes/windows/feeds/feedIcon16.png
+++ /dev/null
diff --git a/browser/themes/windows/feeds/subscribe-ui.css b/browser/themes/windows/feeds/subscribe-ui.css
deleted file mode 100644
index f1650036e..000000000
--- a/browser/themes/windows/feeds/subscribe-ui.css
+++ /dev/null
@@ -1,7 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-.alwaysUse {
-  padding: 5px;
-}
diff --git a/browser/themes/windows/feeds/subscribe.css b/browser/themes/windows/feeds/subscribe.css
deleted file mode 100644
index 81168a144..000000000
--- a/browser/themes/windows/feeds/subscribe.css
+++ /dev/null
@@ -1,184 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-html {
-  background: -moz-Dialog;
-  font: 3mm tahoma,arial,helvetica,sans-serif;
-}
-
-#subscribeUsingDescription,
-#subscribeButton {
-  display: block;
-}
-
-#subscribeUsingDescription {
-  margin-bottom: 0.5em;
-}
-
-#subscribeButton {
-  margin-top: 0.5em;
-  margin-inline-start: auto;
-}
-
-#feedBody {
-  border: 1px solid THreeDShadow;
-  padding: 3em;
-  padding-inline-start: 30px;
-  margin: 2em auto;
-  background: -moz-Field;
-}
-
-#feedHeaderContainer {
-  border: 1px solid ThreeDShadow;
-  border-radius: 10px;
-  margin: -4em auto 0 auto;
-  background-color: InfoBackground;
-  display: flex;
-}
-
-#feedHeaderContainerSpacer {
-  flex-grow: 1;
-}
-
-#feedHeader {
-  margin-top: 4.9em;
-  margin-bottom: 1em;
-  margin-inline-start: 1.4em;
-  margin-inline-end: 1em;
-  padding-inline-start: 2.9em;
-  font-size: 110%;
-  color: InfoText;
-}
-
-#feedIntroText {
-  display: none;
-}
-
-.feedBackground {
-  background: url("chrome://browser/skin/feeds/feedIcon.png") 0% 10% no-repeat InfoBackground;
-}
-
-.videoPodcastBackground {
-  background: url("chrome://browser/skin/feeds/videoFeedIcon.png") 0% 10% no-repeat InfoBackground;
-}
-
-.audioPodcastBackground {
-  background: url("chrome://browser/skin/feeds/audioFeedIcon.png") 0% 10% no-repeat InfoBackground;
-}
-
-#feedHeader[dir="rtl"] {
-  background-position: 100% 10%;
-}
-
-#feedHeader[firstrun="true"] #feedIntroText {
-  padding-top: 0.1em;
-  padding-inline-start: 0.6em;
-  display: block;
-}
-
-#feedHeader[firstrun="true"] > #feedSubscribeLine {
-  padding-inline-start: 1.8em;
-}
-
-#feedSubscribeLine {
-  padding-top: 0.2em;
-  padding-inline-start: 0.5em;
-}
-
-/* Don't print subscription UI */
-@media print {
-  #feedHeaderContainer {
-    display: none;
-  }
-}
-
-body {
-  margin: 0;
-  padding: 0 3em;
-  color: -moz-fieldText;
-  font: message-box;
-}
-
-h1 {
-  font-size: 160%;
-  border-bottom: 2px solid ThreeDLightShadow;
-  margin: 0 0 .2em 0;
-}
-
-h2 {
-  color: GrayText;
-  font-size: 110%;
-  font-weight: normal;
-  margin: 0 0 .6em 0;
-}
-
-#feedTitleLink {
-  float: right;
-  margin-inline-start: .6em;
-  margin-inline-end: 0;
-  margin-top: 0;
-  margin-bottom: 0;
-}
-
-a[href] img {
-  border: none;
-}
-
-#feedTitleContainer {
-  margin-inline-start: 0;
-  margin-inline-end: .6em;
-  margin-top: 0;
-  margin-bottom: 0;
-}
-
-#feedTitleImage {
-  margin-inline-start: .6em;
-  margin-inline-end: 0;
-  margin-top: 0;
-  margin-bottom: 0;
-  max-width: 300px;
-  max-height: 150px;
-}
-
-.feedEntryContent {
-  font-size: 110%;
-}
- 
-.link {
-  color: #0000FF;
-  text-decoration: underline;
-  cursor: pointer;
-}
-
-.link:hover:active {
-  color: #FF0000;
-}
-
-.lastUpdated {
-  font-size: 85%;
-  font-weight: normal;
-}
-
-.type-icon {
-  vertical-align: bottom;
-  height: 16px;
-  width: 16px;
-}
-
-.enclosures {
-  border: 1px solid THreeDShadow;
-  padding: 1em;
-  margin: 1em auto;
-  background: -moz-Dialog;
-}
-
-.enclosure {
-  vertical-align: middle;
-  margin-left: 2px;
-}
-
-.handlersMenuList > .menulist-label-box > .menulist-icon {
-  max-width: 16px;
-  max-height: 16px;
-}
diff --git a/browser/themes/windows/jar.mn b/browser/themes/windows/jar.mn
deleted file mode 100644
index e8db7eed2..000000000
--- a/browser/themes/windows/jar.mn
+++ /dev/null
@@ -1,212 +0,0 @@
-# This Source Code Form is subject to the terms of the Mozilla Public
-# License, v. 2.0. If a copy of the MPL was not distributed with this
-# file, You can obtain one at http://mozilla.org/MPL/2.0/.
-
-browser.jar:
-% skin browser classic/1.0 %skin/classic/browser/
-#include ../shared/jar.inc.mn
-  skin/classic/browser/sanitizeDialog.css
-  skin/classic/browser/aboutSessionRestore-window-icon.png
-  skin/classic/browser/aboutSyncTabs.css
-* skin/classic/browser/syncedtabs/sidebar.css     (syncedtabs/sidebar.css)
-  skin/classic/browser/actionicon-tab.png
-  skin/classic/browser/actionicon-tab@2x.png
-  skin/classic/browser/actionicon-tab-win7.png
-* skin/classic/browser/browser.css
-* skin/classic/browser/devedition.css
-* skin/classic/browser/browser-lightweightTheme.css
-  skin/classic/browser/caption-buttons.svg
-  skin/classic/browser/click-to-play-warning-stripes.png
-  skin/classic/browser/Info.png
-  skin/classic/browser/keyhole-forward-mask.svg
-  skin/classic/browser/livemark-folder.png
-  skin/classic/browser/menu-back.png
-  skin/classic/browser/menu-forward.png
-  skin/classic/browser/menuPanel-customize.png
-  skin/classic/browser/menuPanel-customize@2x.png
-  skin/classic/browser/menuPanel-exit.png
-  skin/classic/browser/menuPanel-exit@2x.png
-  skin/classic/browser/menuPanel-help.png
-  skin/classic/browser/menuPanel-help@2x.png
-  skin/classic/browser/monitor.png
-  skin/classic/browser/monitor_16-10.png
-  skin/classic/browser/pageInfo.css
-  skin/classic/browser/pageInfo.png
-  skin/classic/browser/privatebrowsing-mask-tabstrip.png
-  skin/classic/browser/privatebrowsing-mask-tabstrip-win7.png
-  skin/classic/browser/privatebrowsing-mask-titlebar.png
-  skin/classic/browser/privatebrowsing-mask-titlebar-win7.png
-  skin/classic/browser/privatebrowsing-mask-titlebar-win7-tall.png
-  skin/classic/browser/reload-stop-go.png
-  skin/classic/browser/reload-stop-go@2x.png
-  skin/classic/browser/reload-stop-go-win7.png
-  skin/classic/browser/reload-stop-go-win7@2x.png
-  skin/classic/browser/searchbar.css
-  skin/classic/browser/setDesktopBackground.css
-  skin/classic/browser/slowStartup-16.png
-  skin/classic/browser/Toolbar.png
-  skin/classic/browser/Toolbar@2x.png
-  skin/classic/browser/Toolbar-win7.png
-  skin/classic/browser/Toolbar-win7@2x.png
-  skin/classic/browser/Toolbar-inverted.png
-  skin/classic/browser/Toolbar-inverted@2x.png
-  skin/classic/browser/Toolbar-win8.png
-  skin/classic/browser/Toolbar-win8@2x.png
-  skin/classic/browser/toolbarbutton-dropdown-arrow-win7.png
-  skin/classic/browser/toolbarbutton-dropdown-arrow-inverted.png
-  skin/classic/browser/urlbar-popup-blocked.png
-  skin/classic/browser/urlbar-history-dropmarker.png
-  skin/classic/browser/urlbar-history-dropmarker@2x.png
-  skin/classic/browser/urlbar-history-dropmarker-win7.png
-  skin/classic/browser/urlbar-history-dropmarker-win7@2x.png
-  skin/classic/browser/webRTC-indicator.css
-* skin/classic/browser/controlcenter/panel.css                 (controlcenter/panel.css)
-  skin/classic/browser/customizableui/background-noise-toolbar.png  (customizableui/background-noise-toolbar.png)
-  skin/classic/browser/customizableui/customize-titleBar-toggle.png  (customizableui/customize-titleBar-toggle.png)
-  skin/classic/browser/customizableui/customize-titleBar-toggle@2x.png  (customizableui/customize-titleBar-toggle@2x.png)
-  skin/classic/browser/customizableui/customizeMode-gridTexture.png  (customizableui/customizeMode-gridTexture.png)
-  skin/classic/browser/customizableui/customizeMode-separatorHorizontal.png  (customizableui/customizeMode-separatorHorizontal.png)
-  skin/classic/browser/customizableui/customizeMode-separatorVertical.png  (customizableui/customizeMode-separatorVertical.png)
-  skin/classic/browser/customizableui/menu-arrow.svg           (customizableui/menu-arrow.svg)
-* skin/classic/browser/customizableui/panelUI.css       (customizableui/panelUI.css)
-* skin/classic/browser/downloads/allDownloadsViewOverlay.css   (downloads/allDownloadsViewOverlay.css)
-  skin/classic/browser/downloads/download-glow-menuPanel.png   (downloads/download-glow-menuPanel.png)
-  skin/classic/browser/downloads/download-glow-menuPanel-win7.png   (downloads/download-glow-menuPanel-win7.png)
-  skin/classic/browser/downloads/download-notification-finish.png (downloads/download-notification-finish.png)
-  skin/classic/browser/downloads/download-notification-start.png (downloads/download-notification-start.png)
-* skin/classic/browser/downloads/downloads.css                 (downloads/downloads.css)
-  skin/classic/browser/feeds/feedIcon.png                      (feeds/feedIcon.png)
-  skin/classic/browser/feeds/feedIcon16.png                    (feeds/feedIcon16.png)
-  skin/classic/browser/feeds/subscribe.css                     (feeds/subscribe.css)
-  skin/classic/browser/feeds/subscribe-ui.css                  (feeds/subscribe-ui.css)
-* skin/classic/browser/newtab/newTab.css                       (newtab/newTab.css)
-  skin/classic/browser/places/autocomplete-star.png            (places/autocomplete-star.png)
-  skin/classic/browser/places/autocomplete-star@2x.png         (places/autocomplete-star@2x.png)
-  skin/classic/browser/places/autocomplete-star-win7.png       (places/autocomplete-star-win7.png)
-  skin/classic/browser/places/places.css                       (places/places.css)
-* skin/classic/browser/places/organizer.css                    (places/organizer.css)
-  skin/classic/browser/places/query.png                        (places/query.png)
-  skin/classic/browser/places/bookmarksMenu.png                (places/bookmarksMenu.png)
-  skin/classic/browser/places/bookmarksToolbar.png             (places/bookmarksToolbar.png)
-  skin/classic/browser/places/bookmarksToolbar-menuPanel.png   (places/bookmarksToolbar-menuPanel.png)
-  skin/classic/browser/places/bookmarks-notification-finish.png (places/bookmarks-notification-finish.png)
-  skin/classic/browser/places/calendar.png                     (places/calendar.png)
-  skin/classic/browser/places/toolbarDropMarker.png            (places/toolbarDropMarker.png)
-  skin/classic/browser/places/editBookmarkOverlay.css          (places/editBookmarkOverlay.css)
-  skin/classic/browser/places/libraryToolbar.png               (places/libraryToolbar.png)
-  skin/classic/browser/places/starred48.png                    (places/starred48.png)
-  skin/classic/browser/places/unstarred48.png                  (places/unstarred48.png)
-  skin/classic/browser/places/tag.png                          (places/tag.png)
-  skin/classic/browser/places/history.png                      (places/history.png)
-  skin/classic/browser/places/allBookmarks.png                 (places/allBookmarks.png)
-  skin/classic/browser/places/unsortedBookmarks.png            (places/unsortedBookmarks.png)
-  skin/classic/browser/places/downloads.png                    (places/downloads.png)
-  skin/classic/browser/places/livemark-item.png                (places/livemark-item.png)
-  skin/classic/browser/preferences/alwaysAsk.png               (preferences/alwaysAsk.png)
-  skin/classic/browser/preferences/application.png             (preferences/application.png)
-  skin/classic/browser/preferences/saveFile.png                (preferences/saveFile.png)
-  skin/classic/browser/preferences/preferences.css             (preferences/preferences.css)
-* skin/classic/browser/preferences/in-content/preferences.css  (preferences/in-content/preferences.css)
-* skin/classic/browser/preferences/in-content/dialog.css       (preferences/in-content/dialog.css)
-  skin/classic/browser/preferences/applications.css            (preferences/applications.css)
-  skin/classic/browser/tabbrowser/newtab.svg                   (tabbrowser/newtab.svg)
-  skin/classic/browser/tabbrowser/newtab-win7.svg              (tabbrowser/newtab-win7.svg)
-  skin/classic/browser/tabbrowser/newtab-inverted.svg          (tabbrowser/newtab-inverted.svg)
-  skin/classic/browser/tabbrowser/newtab-inverted-win7.svg     (tabbrowser/newtab-inverted-win7.svg)
-  skin/classic/browser/tabbrowser/tab-active-middle.png        (tabbrowser/tab-active-middle.png)
-  skin/classic/browser/tabbrowser/tab-active-middle@2x.png     (tabbrowser/tab-active-middle@2x.png)
-  skin/classic/browser/tabbrowser/tab-arrow-left.svg           (tabbrowser/tab-arrow-left.svg)
-  skin/classic/browser/tabbrowser/tab-arrow-left-win7.svg      (tabbrowser/tab-arrow-left-win7.svg)
-  skin/classic/browser/tabbrowser/tab-arrow-left-inverted.svg  (tabbrowser/tab-arrow-left-inverted.svg)
-  skin/classic/browser/tabbrowser/tab-background-start.png     (tabbrowser/tab-background-start.png)
-  skin/classic/browser/tabbrowser/tab-background-start@2x.png  (tabbrowser/tab-background-start@2x.png)
-  skin/classic/browser/tabbrowser/tab-background-middle.png    (tabbrowser/tab-background-middle.png)
-  skin/classic/browser/tabbrowser/tab-background-middle@2x.png (tabbrowser/tab-background-middle@2x.png)
-  skin/classic/browser/tabbrowser/tab-background-end.png       (tabbrowser/tab-background-end.png)
-  skin/classic/browser/tabbrowser/tab-background-end@2x.png    (tabbrowser/tab-background-end@2x.png)
-  skin/classic/browser/tabbrowser/tab-background-start-preWin10.png     (tabbrowser/tab-background-start-preWin10.png)
-  skin/classic/browser/tabbrowser/tab-background-start-preWin10@2x.png  (tabbrowser/tab-background-start-preWin10@2x.png)
-  skin/classic/browser/tabbrowser/tab-background-middle-preWin10.png    (tabbrowser/tab-background-middle-preWin10.png)
-  skin/classic/browser/tabbrowser/tab-background-middle-preWin10@2x.png (tabbrowser/tab-background-middle-preWin10@2x.png)
-  skin/classic/browser/tabbrowser/tab-background-end-preWin10.png       (tabbrowser/tab-background-end-preWin10.png)
-  skin/classic/browser/tabbrowser/tab-background-end-preWin10@2x.png    (tabbrowser/tab-background-end-preWin10@2x.png)
-
-# NOTE: The following two files (tab-selected-end.svg, tab-selected-start.svg) get pre-processed in
-#       Makefile.in with a non-default marker of "%" and the result of that gets packaged.
-  skin/classic/browser/tabbrowser/tab-selected-end.svg         (tab-selected-end.svg)
-  skin/classic/browser/tabbrowser/tab-selected-start.svg       (tab-selected-start.svg)
-
-  skin/classic/browser/tabbrowser/tab-stroke-end.png           (tabbrowser/tab-stroke-end.png)
-  skin/classic/browser/tabbrowser/tab-stroke-end@2x.png        (tabbrowser/tab-stroke-end@2x.png)
-  skin/classic/browser/tabbrowser/tab-stroke-start.png         (tabbrowser/tab-stroke-start.png)
-  skin/classic/browser/tabbrowser/tab-stroke-start@2x.png      (tabbrowser/tab-stroke-start@2x.png)
-  skin/classic/browser/tabbrowser/tabDragIndicator.png         (tabbrowser/tabDragIndicator.png)
-  skin/classic/browser/sync-16.png
-  skin/classic/browser/sync-32.png
-  skin/classic/browser/sync-128.png
-  skin/classic/browser/sync-bg.png
-  skin/classic/browser/sync-desktopIcon.svg  (../shared/sync-desktopIcon.svg)
-  skin/classic/browser/sync-horizontalbar.png
-  skin/classic/browser/sync-horizontalbar@2x.png
-  skin/classic/browser/sync-horizontalbar-win7.png
-  skin/classic/browser/sync-horizontalbar-win7@2x.png
-  skin/classic/browser/sync-mobileIcon.svg  (../shared/sync-mobileIcon.svg)
-  skin/classic/browser/sync-notification-24.png
-  skin/classic/browser/syncSetup.css
-  skin/classic/browser/syncCommon.css
-  skin/classic/browser/syncQuota.css
-  skin/classic/browser/syncProgress-horizontalbar.png
-  skin/classic/browser/syncProgress-horizontalbar@2x.png
-  skin/classic/browser/syncProgress-horizontalbar-win7.png
-  skin/classic/browser/syncProgress-horizontalbar-win7@2x.png
-  skin/classic/browser/syncProgress-menuPanel.png
-  skin/classic/browser/syncProgress-menuPanel@2x.png
-  skin/classic/browser/syncProgress-toolbar.png
-  skin/classic/browser/syncProgress-toolbar@2x.png
-  skin/classic/browser/syncProgress-toolbar-inverted.png
-  skin/classic/browser/syncProgress-toolbar-inverted@2x.png
-  skin/classic/browser/syncProgress-toolbar-win7.png
-  skin/classic/browser/syncProgress-toolbar-win7@2x.png
-
-[extensions/{972ce4c6-7e08-4474-a285-3208198ce6fd}] chrome.jar:
-% override chrome://browser/skin/page-livemarks.png                   chrome://browser/skin/feeds/feedIcon16.png
-% override chrome://browser/skin/feeds/audioFeedIcon.png              chrome://browser/skin/feeds/feedIcon.png
-% override chrome://browser/skin/feeds/audioFeedIcon16.png            chrome://browser/skin/feeds/feedIcon16.png
-% override chrome://browser/skin/feeds/videoFeedIcon.png              chrome://browser/skin/feeds/feedIcon.png
-% override chrome://browser/skin/feeds/videoFeedIcon16.png            chrome://browser/skin/feeds/feedIcon16.png
-
-% override chrome://browser/skin/aboutSessionRestore-window-icon.png  chrome://browser/skin/preferences/application.png                 os!=WINNT
-
-% override chrome://browser/skin/actionicon-tab.png                   chrome://browser/skin/actionicon-tab-win7.png                 os=WINNT osversion<=6.1
-% override chrome://browser/skin/privatebrowsing-mask-tabstrip.png    chrome://browser/skin/privatebrowsing-mask-tabstrip-win7.png  os=WINNT osversion<=6.1
-% override chrome://browser/skin/privatebrowsing-mask-titlebar.png    chrome://browser/skin/privatebrowsing-mask-titlebar-win7.png  os=WINNT osversion<=6.1
-% override chrome://browser/skin/reload-stop-go.png                   chrome://browser/skin/reload-stop-go-win7.png                 os=WINNT osversion<=6.1
-% override chrome://browser/skin/reload-stop-go@2x.png                chrome://browser/skin/reload-stop-go-win7@2x.png              os=WINNT osversion<=6.1
-% override chrome://browser/skin/sync-horizontalbar.png               chrome://browser/skin/sync-horizontalbar-win7.png             os=WINNT osversion<=6.1
-% override chrome://browser/skin/sync-horizontalbar@2x.png            chrome://browser/skin/sync-horizontalbar-win7@2x.png          os=WINNT osversion<=6.1
-% override chrome://browser/skin/syncProgress-horizontalbar.png       chrome://browser/skin/syncProgress-horizontalbar-win7.png     os=WINNT osversion<=6.1
-% override chrome://browser/skin/syncProgress-horizontalbar@2x.png    chrome://browser/skin/syncProgress-horizontalbar-win7@2x.png  os=WINNT osversion<=6.1
-% override chrome://browser/skin/syncProgress-toolbar.png             chrome://browser/skin/syncProgress-toolbar-win7.png           os=WINNT osversion<=6.1
-% override chrome://browser/skin/syncProgress-toolbar@2x.png          chrome://browser/skin/syncProgress-toolbar-win7@2x.png        os=WINNT osversion<=6.1
-% override chrome://browser/skin/toolbarbutton-dropdown-arrow.png     chrome://browser/skin/toolbarbutton-dropdown-arrow-win7.png   os=WINNT osversion<=6.1
-% override chrome://browser/skin/urlbar-history-dropmarker.png        chrome://browser/skin/urlbar-history-dropmarker-win7.png      os=WINNT osversion<=6.1
-% override chrome://browser/skin/urlbar-history-dropmarker@2x.png     chrome://browser/skin/urlbar-history-dropmarker-win7@2x.png   os=WINNT osversion<=6.1
-% override chrome://browser/skin/downloads/download-glow-menuPanel.png  chrome://browser/skin/downloads/download-glow-menuPanel-win7.png os=WINNT osversion<=6.1
-% override chrome://browser/skin/places/autocomplete-star.png         chrome://browser/skin/places/autocomplete-star-win7.png       os=WINNT osversion<=6.1
-% override chrome://browser/skin/tabbrowser/newtab.svg                chrome://browser/skin/tabbrowser/newtab-win7.svg              os=WINNT osversion<=6.1
-% override chrome://browser/skin/tabbrowser/newtab-inverted.svg       chrome://browser/skin/tabbrowser/newtab-inverted-win7.svg     os=WINNT osversion<=6.1
-% override chrome://browser/skin/tabbrowser/tab-arrow-left.svg        chrome://browser/skin/tabbrowser/tab-arrow-left-win7.svg      os=WINNT osversion<=6.1
-
-% override chrome://browser/skin/Toolbar@2x.png                       chrome://browser/skin/Toolbar-win7@2x.png                         os=WINNT osversion=6.1
-% override chrome://browser/skin/Toolbar@2x.png                       chrome://browser/skin/Toolbar-win8@2x.png                         os=WINNT osversion=6.2
-% override chrome://browser/skin/Toolbar@2x.png                       chrome://browser/skin/Toolbar-win8@2x.png                         os=WINNT osversion=6.3
-% override chrome://browser/skin/Toolbar.png                          chrome://browser/skin/Toolbar-win7.png                            os=WINNT osversion=6.1
-% override chrome://browser/skin/Toolbar.png                          chrome://browser/skin/Toolbar-win8.png                            os=WINNT osversion=6.2
-% override chrome://browser/skin/Toolbar.png                          chrome://browser/skin/Toolbar-win8.png                            os=WINNT osversion=6.3
-
-% override chrome://browser/skin/tabbrowser/tab-background-start.png     chrome://browser/skin/tabbrowser/tab-background-start-preWin10.png     os=WINNT osversion<=6.3
-% override chrome://browser/skin/tabbrowser/tab-background-start@2x.png  chrome://browser/skin/tabbrowser/tab-background-start-preWin10@2x.png  os=WINNT osversion<=6.3
-% override chrome://browser/skin/tabbrowser/tab-background-middle.png    chrome://browser/skin/tabbrowser/tab-background-middle-preWin10.png    os=WINNT osversion<=6.3
-% override chrome://browser/skin/tabbrowser/tab-background-middle@2x.png chrome://browser/skin/tabbrowser/tab-background-middle-preWin10@2x.png os=WINNT osversion<=6.3
-% override chrome://browser/skin/tabbrowser/tab-background-end.png       chrome://browser/skin/tabbrowser/tab-background-end-preWin10.png       os=WINNT osversion<=6.3
-% override chrome://browser/skin/tabbrowser/tab-background-end@2x.png    chrome://browser/skin/tabbrowser/tab-background-end-preWin10@2x.png    os=WINNT osversion<=6.3
diff --git a/browser/themes/windows/keyhole-forward-mask.svg b/browser/themes/windows/keyhole-forward-mask.svg
deleted file mode 100644
index 051f6d87c..000000000
--- a/browser/themes/windows/keyhole-forward-mask.svg
+++ /dev/null
@@ -1,14 +0,0 @@
-<?xml version="1.0"?>
-<!-- This Source Code Form is subject to the terms of the Mozilla Public
-   - License, v. 2.0. If a copy of the MPL was not distributed with this
-   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
-<svg xmlns="http://www.w3.org/2000/svg">
-  <mask id="mask" maskContentUnits="objectBoundingBox">
-    <rect x="0" y="0" width="1" height="1" fill="#fff"/>
-    <circle cx="-0.46" cy="0.5" r="0.63"/>
-  </mask>
-  <mask id="mask-hover" maskContentUnits="objectBoundingBox">
-    <rect x="0" y="0" width="1" height="1" fill="#fff"/>
-    <circle cx="-0.35" cy="0.5" r="0.58"/>
-  </mask>
-</svg>
diff --git a/browser/themes/windows/livemark-folder.png b/browser/themes/windows/livemark-folder.png
deleted file mode 100644
index 0be774e63..000000000
--- a/browser/themes/windows/livemark-folder.png
+++ /dev/null
diff --git a/browser/themes/windows/loop/toolbar-win10.png b/browser/themes/windows/loop/toolbar-win10.png
deleted file mode 100644
index 59337608d..000000000
--- a/browser/themes/windows/loop/toolbar-win10.png
+++ /dev/null
diff --git a/browser/themes/windows/loop/toolbar-win10@2x.png b/browser/themes/windows/loop/toolbar-win10@2x.png
deleted file mode 100644
index b87e1ffa3..000000000
--- a/browser/themes/windows/loop/toolbar-win10@2x.png
+++ /dev/null
diff --git a/browser/themes/windows/menu-back.png b/browser/themes/windows/menu-back.png
deleted file mode 100644
index 7c1d4620a..000000000
--- a/browser/themes/windows/menu-back.png
+++ /dev/null
diff --git a/browser/themes/windows/menu-forward.png b/browser/themes/windows/menu-forward.png
deleted file mode 100644
index 82cd87483..000000000
--- a/browser/themes/windows/menu-forward.png
+++ /dev/null
diff --git a/browser/themes/windows/menuPanel-customize.png b/browser/themes/windows/menuPanel-customize.png
deleted file mode 100644
index 161426f89..000000000
--- a/browser/themes/windows/menuPanel-customize.png
+++ /dev/null
diff --git a/browser/themes/windows/menuPanel-customize@2x.png b/browser/themes/windows/menuPanel-customize@2x.png
deleted file mode 100644
index 5ce3b766a..000000000
--- a/browser/themes/windows/menuPanel-customize@2x.png
+++ /dev/null
diff --git a/browser/themes/windows/menuPanel-exit.png b/browser/themes/windows/menuPanel-exit.png
deleted file mode 100644
index 8daaffe95..000000000
--- a/browser/themes/windows/menuPanel-exit.png
+++ /dev/null
diff --git a/browser/themes/windows/menuPanel-exit@2x.png b/browser/themes/windows/menuPanel-exit@2x.png
deleted file mode 100644
index d48426546..000000000
--- a/browser/themes/windows/menuPanel-exit@2x.png
+++ /dev/null
diff --git a/browser/themes/windows/menuPanel-help.png b/browser/themes/windows/menuPanel-help.png
deleted file mode 100644
index 2f2b010bc..000000000
--- a/browser/themes/windows/menuPanel-help.png
+++ /dev/null
diff --git a/browser/themes/windows/menuPanel-help@2x.png b/browser/themes/windows/menuPanel-help@2x.png
deleted file mode 100644
index b8f0a80fa..000000000
--- a/browser/themes/windows/menuPanel-help@2x.png
+++ /dev/null
diff --git a/browser/themes/windows/monitor.png b/browser/themes/windows/monitor.png
deleted file mode 100644
index 3c26d2674..000000000
--- a/browser/themes/windows/monitor.png
+++ /dev/null
diff --git a/browser/themes/windows/monitor_16-10.png b/browser/themes/windows/monitor_16-10.png
deleted file mode 100644
index 06d91ea37..000000000
--- a/browser/themes/windows/monitor_16-10.png
+++ /dev/null
diff --git a/browser/themes/windows/moz.build b/browser/themes/windows/moz.build
deleted file mode 100644
index b787ab08e..000000000
--- a/browser/themes/windows/moz.build
+++ /dev/null
@@ -1,13 +0,0 @@
-# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
-# vim: set filetype=python:
-# This Source Code Form is subject to the terms of the Mozilla Public
-# License, v. 2.0. If a copy of the MPL was not distributed with this
-# file, You can obtain one at http://mozilla.org/MPL/2.0/.
-
-DIRS += ['communicator']
-
-JAR_MANIFESTS += ['jar.mn']
-
-DEFINES['CAN_DRAW_IN_TITLEBAR'] = 1
-
-include('../tab-svgs.mozbuild')
diff --git a/browser/themes/windows/newtab/newTab.css b/browser/themes/windows/newtab/newTab.css
deleted file mode 100644
index 0f7aae6de..000000000
--- a/browser/themes/windows/newtab/newTab.css
+++ /dev/null
@@ -1,20 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-%include ../../shared/newtab/newTab.inc.css
-
-
-.newtab-undo-button {
-  color: rgb(0,102,204);
-}
-
-.newtab-undo-button > .button-box {
-  padding: 0;
-}
-
-.newtab-title {
-  font: message-box;
-  font-size: 13px;
-  line-height: 30px;
-}
diff --git a/browser/themes/windows/pageInfo.css b/browser/themes/windows/pageInfo.css
deleted file mode 100644
index 97d7615c1..000000000
--- a/browser/themes/windows/pageInfo.css
+++ /dev/null
@@ -1,262 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-@import "chrome://global/skin/";
-
-/* View buttons */
-#viewGroup {
-  padding-inline-start: 10px;
-}
-
-#viewGroup > radio {
-  list-style-image: url("chrome://browser/skin/pageInfo.png");
-  -moz-box-orient: vertical;
-  -moz-box-align: center;
-  -moz-appearance: none;
-  padding: 5px 3px 1px 3px;
-  margin: 0 1px;
-  min-width: 4.5em;
-}
-
-#viewGroup > radio:hover {
-  background-color: #E0E8F6;
-  color: black;
-}
-
-#viewGroup > radio[selected="true"] {
-  background-color: #C1D2EE;
-  color: black;
-}
-
-#topBar {
-  border-bottom: 2px groove ThreeDFace;
-  padding-inline-start: 10px;
-  background-color: -moz-Field;
-  color: -moz-FieldText;
-}
-
-#generalTab {
-  -moz-image-region: rect(0px, 32px, 32px, 0px)
-}
-
-#generalTab:hover, #generalTab[selected="true"] {
-  -moz-image-region: rect(32px, 32px, 64px, 0px)
-}
-
-#mediaTab {
-  -moz-image-region: rect(0px, 64px, 32px, 32px)
-}
-
-#mediaTab:hover, #mediaTab[selected="true"] {
-  -moz-image-region: rect(32px, 64px, 64px, 32px)
-}
-
-#feedTab {
-  -moz-image-region: rect(0px, 96px, 32px, 64px)
-}
-
-#feedTab:hover, #feedTab[selected="true"] {
-  -moz-image-region: rect(32px, 96px, 64px, 64px)
-}
-
-#permTab {
-  -moz-image-region: rect(0px, 128px, 32px, 96px)
-}
-
-#permTab:hover, #permTab[selected="true"] {
-  -moz-image-region: rect(32px, 128px, 64px, 96px)
-}
-
-#securityTab {
-  -moz-image-region: rect(0px, 160px, 32px, 128px)
-}
-
-#securityTab:hover, #securityTab[selected="true"] {
-  -moz-image-region: rect(32px, 160px, 64px, 128px)
-}
-
-deck {
-  padding: 10px 10px 10px 10px;
-}
-
-/* Misc */
-tree {
-  margin: .5em;
-}
-
-.gridSeparator {
-  width: .5em;
-}
-
-textbox {
-  background: transparent !important;
-  border: none;
-  padding: 0px;
-  margin-top: 1px;
-  -moz-appearance: none;
-}
-
-textbox.header {
-  margin-inline-start: 0;
-}
-
-.iframe {
-  margin: .5em;
-  background: white;
-  overflow: auto;
-}
-
-.fixedsize {
-  height: 8.5em;
-}
-
-textbox[disabled] {
-  font-style: italic;
-}
-
-/* General Tab */
-groupbox.collapsable caption .caption-icon {
-  width: 9px;
-  height: 9px;
-  background-repeat: no-repeat;
-  background-position: center;
-  margin-inline-start: 2px;
-  margin-inline-end: 2px;
-  background-image: url("chrome://global/skin/tree/twisty.svg#open");
-}
-
-groupbox.collapsable[closed="true"] {
-  border: none;
-  margin-bottom: 9px;
-  -moz-appearance: none;
-}
-
-groupbox.collapsable[closed="true"] caption .caption-icon {
-  background-image: url("chrome://global/skin/tree/twisty.svg#clsd");
-}
-
-groupbox tree {
-  margin: 0 3px;
-  border: none;
-}
-
-#securityBox description {
-  margin-inline-start: 10px;
-}
-
-#general-security-identity {
-  white-space: pre-wrap;
-  line-height: 2em;
-}
-
-/* Media Tab */
-#imagetree {
-  min-height: 10em;
-  margin-bottom: 0;
-}
-
-#mediaSplitter {
-  border-style: none;
-  background: none;
-  height: .8em;
-}
-
-#mediaGrid {
-  min-height: 9em;
-}
-
-#mediaLabelColumn {
-  min-width: 10em;
-}
-
-#thepreviewimage {
-  margin: 1em;
-}
-
-treechildren::-moz-tree-cell-text(broken) {
-  font-style: italic;
-  color: graytext;
-}
-
-/* Feeds Tab */
-#feedtree {
-  margin-bottom: 0px;
-}
-
-#feedListbox richlistitem {
-  padding-top: 6px;
-  padding-bottom: 6px;
-  padding-inline-start: 7px;
-  padding-inline-end: 7px;
-  min-height: 25px;
-  border-bottom: 1px dotted #C0C0C0;
-}
-
-#feedListbox richlistitem[selected="true"] {
-  background-color: -moz-Dialog;
-  color: -moz-DialogText;
-}
-
-#feedListbox {
-  border: 2px solid;
-  -moz-border-top-colors: ThreeDShadow ThreeDDarkShadow;
-  -moz-border-right-colors: ThreeDHighlight ThreeDLightShadow;
-  -moz-border-bottom-colors: ThreeDHighlight ThreeDLightShadow;
-  -moz-border-left-colors: ThreeDShadow ThreeDDarkShadow;
-}
-
-.feedTitle {
-  font-weight: bold;
-}
-
-/* Permissions Tab */
-#permList {
-  margin-top: .5em;
-  overflow: auto;
-  border: 2px solid;
-  -moz-border-top-colors: ThreeDShadow ThreeDDarkShadow;
-  -moz-border-right-colors: ThreeDHighlight ThreeDLightShadow;
-  -moz-border-bottom-colors: ThreeDHighlight ThreeDLightShadow;
-  -moz-border-left-colors: ThreeDShadow ThreeDDarkShadow;
-  background-color: -moz-field;
-}
-
-.permission {
-  padding-top: 6px;
-  padding-bottom: 6px;
-  padding-inline-start: 7px;
-  padding-inline-end: 7px;
-  min-height: 25px;
-  border-bottom: 1px dotted #C0C0C0;
-}
-
-.permissionLabel {
-  font-weight: bold;
-}
-
-.permission:hover {
-  background-color: -moz-dialog;
-}
-
-/* Security Tab */
-#securityPanel .caption-icon {
-  display: none;
-}
-
-#securityPanel .header {
-  font-size: 120%;
-}
-
-#securityPanel .fieldLabel {
-  margin: 2px 10px 3px;
-}
-
-#securityPanel .fieldValue {
-  font-weight: bold;
-  margin: 2px 10px 3px;
-}
-
-#securityPanel row {
-  -moz-box-align: center;
-}
diff --git a/browser/themes/windows/pageInfo.png b/browser/themes/windows/pageInfo.png
deleted file mode 100644
index bc1b97c55..000000000
--- a/browser/themes/windows/pageInfo.png
+++ /dev/null
diff --git a/browser/themes/windows/places/allBookmarks.png b/browser/themes/windows/places/allBookmarks.png
deleted file mode 100644
index 5331798e3..000000000
--- a/browser/themes/windows/places/allBookmarks.png
+++ /dev/null
diff --git a/browser/themes/windows/places/autocomplete-star-win7.png b/browser/themes/windows/places/autocomplete-star-win7.png
deleted file mode 100644
index af694e91c..000000000
--- a/browser/themes/windows/places/autocomplete-star-win7.png
+++ /dev/null
diff --git a/browser/themes/windows/places/autocomplete-star.png b/browser/themes/windows/places/autocomplete-star.png
deleted file mode 100644
index 9ba69f727..000000000
--- a/browser/themes/windows/places/autocomplete-star.png
+++ /dev/null
diff --git a/browser/themes/windows/places/autocomplete-star@2x.png b/browser/themes/windows/places/autocomplete-star@2x.png
deleted file mode 100644
index f30523e3d..000000000
--- a/browser/themes/windows/places/autocomplete-star@2x.png
+++ /dev/null
diff --git a/browser/themes/windows/places/bookmarks-notification-finish.png b/browser/themes/windows/places/bookmarks-notification-finish.png
deleted file mode 100644
index 1e3f565f9..000000000
--- a/browser/themes/windows/places/bookmarks-notification-finish.png
+++ /dev/null
diff --git a/browser/themes/windows/places/bookmarksMenu.png b/browser/themes/windows/places/bookmarksMenu.png
deleted file mode 100644
index 84032e1f0..000000000
--- a/browser/themes/windows/places/bookmarksMenu.png
+++ /dev/null
diff --git a/browser/themes/windows/places/bookmarksToolbar-menuPanel.png b/browser/themes/windows/places/bookmarksToolbar-menuPanel.png
deleted file mode 100644
index 7cbe93d7a..000000000
--- a/browser/themes/windows/places/bookmarksToolbar-menuPanel.png
+++ /dev/null
diff --git a/browser/themes/windows/places/bookmarksToolbar.png b/browser/themes/windows/places/bookmarksToolbar.png
deleted file mode 100644
index 70bba1457..000000000
--- a/browser/themes/windows/places/bookmarksToolbar.png
+++ /dev/null
diff --git a/browser/themes/windows/places/calendar.png b/browser/themes/windows/places/calendar.png
deleted file mode 100644
index 4127e5988..000000000
--- a/browser/themes/windows/places/calendar.png
+++ /dev/null
diff --git a/browser/themes/windows/places/downloads.png b/browser/themes/windows/places/downloads.png
deleted file mode 100644
index f21a170cf..000000000
--- a/browser/themes/windows/places/downloads.png
+++ /dev/null
diff --git a/browser/themes/windows/places/editBookmarkOverlay.css b/browser/themes/windows/places/editBookmarkOverlay.css
deleted file mode 100644
index 3d67cd3f4..000000000
--- a/browser/themes/windows/places/editBookmarkOverlay.css
+++ /dev/null
@@ -1,80 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-/**** folder menulist ****/
-.folder-icon > .menulist-label-box > .menulist-icon {
-  width: 16px;
-  height: 16px;
-}
-
-.folder-icon > .menu-iconic-left {
-  display: -moz-box;
-}
-
-.folder-icon {
-  list-style-image: url("chrome://global/skin/icons/folder-item.png") !important;
-  -moz-image-region: rect(0px, 32px, 16px, 16px) !important;
-}
-
-
-/**** expanders ****/
-
-.expander-up,
-.expander-down {
-  min-width: 0;
-  margin: 0;
-  margin-inline-end: 4px;
-}
-
-.expander-up > .button-box,
-.expander-down > .button-box {
-  padding: 0;
-}
-
-.expander-up {
-  list-style-image: url("chrome://global/skin/icons/collapse.png");
-}
-
-.expander-down {
-  list-style-image: url("chrome://global/skin/icons/expand.png");
-}
-
-#editBookmarkPanelContent {
-  min-width: 23em;
-}
-
-#editBMPanel_folderTree {
-  margin-top: 2px;
-  margin-bottom: 2px;
-}
-
-/* Hide the value column of the tag autocomplete popup
- * leaving only the comment column visible. This is
- * so that only the tag being edited is shown in the
- * popup.
- */
-#editBMPanel_tagsField #treecolAutoCompleteValue {
-  visibility: collapse;
-}
-
-
-/* ::::: bookmark panel dropdown icons ::::: */
-
-#editBMPanel_folderMenuList[selectedIndex="0"],
-#editBMPanel_toolbarFolderItem {
-  list-style-image: url("chrome://browser/skin/places/bookmarksToolbar.png") !important;
-  -moz-image-region: auto !important;
-}
-
-#editBMPanel_folderMenuList[selectedIndex="1"],
-#editBMPanel_bmRootItem {
-  list-style-image: url("chrome://browser/skin/places/bookmarksMenu.png") !important;
-  -moz-image-region: auto !important;
-}
-
-#editBMPanel_folderMenuList[selectedIndex="2"],
-#editBMPanel_unfiledRootItem {
-  list-style-image: url("chrome://browser/skin/places/unsortedBookmarks.png") !important;
-  -moz-image-region: auto !important;
-}
diff --git a/browser/themes/windows/places/history.png b/browser/themes/windows/places/history.png
deleted file mode 100644
index 656626930..000000000
--- a/browser/themes/windows/places/history.png
+++ /dev/null
diff --git a/browser/themes/windows/places/libraryToolbar.png b/browser/themes/windows/places/libraryToolbar.png
deleted file mode 100644
index 31cee7a49..000000000
--- a/browser/themes/windows/places/libraryToolbar.png
+++ /dev/null
diff --git a/browser/themes/windows/places/livemark-item.png b/browser/themes/windows/places/livemark-item.png
deleted file mode 100644
index 4522a20ae..000000000
--- a/browser/themes/windows/places/livemark-item.png
+++ /dev/null
diff --git a/browser/themes/windows/places/organizer.css b/browser/themes/windows/places/organizer.css
deleted file mode 100644
index 9ae4c8370..000000000
--- a/browser/themes/windows/places/organizer.css
+++ /dev/null
@@ -1,202 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-%include ../windowsShared.inc
-%filter substitution
-
-/* Toolbar */
-#placesToolbar {
-  padding: 3px;
-  padding-inline-end: 6px;
-}
-
-#placesToolbar > toolbarbutton[disabled] > .toolbarbutton-icon {
-  opacity: .4;
-}
-
-#back-button,
-#forward-button {
-  list-style-image: url("chrome://browser/skin/Toolbar.png");
-}
-
-#back-button {
-  -moz-image-region: rect(0, 54px, 18px, 36px);
-}
-
-#forward-button {
-  -moz-image-region: rect(0, 72px, 18px, 54px);
-}
-
-#back-button:-moz-locale-dir(rtl) > .toolbarbutton-icon,
-#forward-button:-moz-locale-dir(rtl) > .toolbarbutton-icon {
-  transform: scaleX(-1);
-}
-
-/* Menu */
-#placesMenu {
-  margin-inline-start: 6px;
-  -moz-appearance: none;
-  border: none;
-}
-
-#placesMenu > menu {
-  padding-inline-start: 4px;
-  padding-inline-end: 1px;
-  padding-top: 2px;
-  padding-bottom: 2px;
-  -moz-appearance: toolbarbutton;
-%ifdef XP_WIN
-% use standard menu colors on OS/2
-  color: -moz-DialogText;
-%endif
-  border: 1px solid transparent;
-}
-
-#placesMenu > menu[_moz-menuactive="true"] {
-  background-color: transparent;
-}
-
-#placesMenu > menu:hover {
-  border-color: ThreeDHighlight ThreeDShadow ThreeDShadow ThreeDHighlight;
-}
-
-#placesMenu > menu[open="true"] {
-  border-color: ThreeDShadow ThreeDHighlight ThreeDHighlight ThreeDShadow;
-  padding-inline-start: 5px;
-  padding-inline-end: 0px;
-  padding-top: 3px;
-  padding-bottom: 1px;
-}
-
-#placesMenu > menu > .menubar-text {
-  padding-inline-end: 8px;
-  background: url(chrome://global/skin/arrow/arrow-dn.gif) right center no-repeat;
-}
-
-#placesMenu > menu > .menubar-text:-moz-locale-dir(rtl) {
-  background-position: left center;
-}
-
-/* organize, view and maintenance buttons icons */
-#organizeButton, 
-#viewMenu, 
-#maintenanceButton {
-  list-style-image: url("chrome://browser/skin/places/libraryToolbar.png");
-}
-
-/* organize button */
-#organizeButton {
-  -moz-image-region: rect(0px, 16px, 16px, 0px);
-}
-#organizeButton:hover,
-#organizeButton[open="true"] {
-  -moz-image-region: rect(16px, 16px, 32px, 0px);
-}
-
-/* view button */
-#viewMenu {
-  -moz-image-region: rect(0px, 32px, 16px, 16px);
-}
-#viewMenu:hover,
-#viewMenu[open="true"] {
-  -moz-image-region: rect(16px, 32px, 32px, 16px);
-}
-
-/* maintenance button */
-#maintenanceButton {
-  -moz-image-region: rect(0px, 48px, 16px, 32px);
-}
-#maintenanceButton:hover,
-#maintenanceButton[open="true"] {
-  -moz-image-region: rect(16px, 48px, 32px, 32px);
-}
-
-/* Info box */
-#detailsDeck {
-  border-top: 1px solid ThreeDShadow;
-  padding: 5px;
-}
-
-#infoBoxExpanderLabel {
-  padding-inline-start: 2px;
-}
-
-#searchFilter {
-  margin: 0;
-}
-
-/**
- * Downloads pane
- */
-
-#clearDownloadsButton > .toolbarbutton-icon {
-  display: none;
-}
-
-#clearDownloadsButton {
-  padding-inline-start: 9px;
-  padding-inline-end: 9px;
-}
-
-@media not all and (-moz-windows-classic) {
-  #placesToolbox {
-    -moz-appearance: none;
-    background-color: transparent;
-  }
-
-  #placesToolbar {
-    -moz-appearance: none;
-    background-color: -moz-Dialog;
-    color: -moz-dialogText;
-  }
-}
-
-@media (-moz-windows-default-theme) {
-  #placesView > splitter {
-    border: 0;
-    border-inline-end: 1px solid #A9B7C9;
-    min-width: 0;
-    width: 3px;
-    background-color: transparent;
-    margin-inline-start: -3px;
-    position: relative;
-  }
-}
-
-@media (-moz-windows-glass) {
-  #placesToolbox {
-    border-top: none;
-  }
-
-  #placesToolbar {
-    background-image: linear-gradient(@toolbarHighlight@, transparent);
-  }
-}
-
-@media (-moz-windows-default-theme) and (-moz-os-version: windows-win7) {
-  #placesView,
-  #infoPane,
-  #placesList,
-  #placeContent {
-    background-color: #EEF3FA;
-  }
-
-  #placesToolbar {
-    background-color: @customToolbarColor@;
-    color: black;
-  }
-
-  #detailsDeck {
-    border-top-color: #A9B7C9;
-  }
-
-  #searchFilter {
-    -moz-appearance: none;
-    padding: 2px;
-    padding-inline-start: 4px;
-    background-clip: padding-box;
-    border: 1px solid rgba(0,0,0,.32);
-    border-radius: 2px;
-  }
-}
diff --git a/browser/themes/windows/places/places.css b/browser/themes/windows/places/places.css
deleted file mode 100644
index 769cfcc25..000000000
--- a/browser/themes/windows/places/places.css
+++ /dev/null
@@ -1,172 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-/* Sidebars */
-.sidebar-placesTree {
-  -moz-appearance: none;
-  border: 0;
-  margin: 0;
-  border-top: 1px solid ThreeDShadow;
-}
-
-.sidebar-placesTreechildren::-moz-tree-cell(leaf) ,
-.sidebar-placesTreechildren::-moz-tree-image(leaf) {
-  cursor: pointer;
-}
-
-.sidebar-placesTreechildren::-moz-tree-cell-text(leaf, hover) {
-  cursor: pointer;
-  text-decoration: underline;
-}
-
-.sidebar-placesTreechildren::-moz-tree-cell(separator) {
-  cursor: default;
-}
-
-@media (-moz-windows-default-theme) {
-  .sidebar-placesTree {
-    background-color: transparent;
-    border-top: none;
-  }
-
-  .sidebar-placesTreechildren::-moz-tree-cell-text(leaf, hover) {
-    text-decoration: none;
-  }
-
-  @media (-moz-os-version: windows-win7) {
-    #bookmarksPanel,
-    #history-panel,
-    #tabs-panel {
-      background-color: #EEF3FA;
-    }
-  }
-}
-
-/* Trees */
-treechildren::-moz-tree-image(title) {
-  list-style-image: url("chrome://mozapps/skin/places/defaultFavicon.png");
-  padding-right: 2px;
-  margin: 0px 2px;
-  width: 16px;
-  height: 16px;
-}
-
-treechildren::-moz-tree-image(title, livemarkItem) {
-  list-style-image: url("chrome://browser/skin/places/livemark-item.png");
-  -moz-image-region: rect(0px, 16px, 16px, 0px);
-}
-
-treechildren::-moz-tree-image(title, livemarkItem, visited) {
-  -moz-image-region: rect(0px, 32px, 16px, 16px);
-}
-
-treechildren::-moz-tree-image(title, separator) {
-  list-style-image: none;
-  width: 0;
-  height: 0;
-}
-
-treechildren::-moz-tree-image(title, container) {
-  list-style-image: url("chrome://global/skin/icons/folder-item.png");
-  -moz-image-region: rect(0px, 32px, 16px, 16px);
-}
-
-treechildren::-moz-tree-image(title, open) {
-  -moz-image-region: rect(16px, 32px, 32px, 16px);
-}
-
-treechildren::-moz-tree-image(title, container, livemark) {
-  list-style-image: url("chrome://browser/skin/livemark-folder.png");
-  -moz-image-region: auto;
-}
-
-treechildren::-moz-tree-image(container, OrganizerQuery_AllBookmarks) {
-  list-style-image: url("chrome://browser/skin/places/allBookmarks.png");
-  -moz-image-region: auto;
-}
-
-treechildren::-moz-tree-image(container, OrganizerQuery_BookmarksToolbar) {
-  list-style-image: url("chrome://browser/skin/places/bookmarksToolbar.png");
-  -moz-image-region: auto;
-}
-
-treechildren::-moz-tree-image(container, OrganizerQuery_BookmarksMenu) {
-  list-style-image: url("chrome://browser/skin/places/bookmarksMenu.png");
-  -moz-image-region: auto;
-}
-
-treechildren::-moz-tree-image(container, OrganizerQuery_UnfiledBookmarks) {
-  list-style-image: url("chrome://browser/skin/places/unsortedBookmarks.png");
-  -moz-image-region: auto;
-}
-
-/* query-nodes should be styled even if they're not expandable */
-treechildren::-moz-tree-image(title, query) {
-  list-style-image: url("chrome://browser/skin/places/query.png");
-  -moz-image-region: auto;
-}
-
-treechildren::-moz-tree-image(title, query, tagContainer),
-treechildren::-moz-tree-image(query, OrganizerQuery_Tags) {
-  list-style-image: url("chrome://browser/skin/places/tag.png");
-  -moz-image-region: auto;
-}
-
-treechildren::-moz-tree-image(query, OrganizerQuery_Downloads) {
-  list-style-image: url("chrome://browser/skin/places/downloads.png");
-  -moz-image-region: auto;
-}
-
-/* calendar icon for folders grouping items by date */
-treechildren::-moz-tree-image(title, query, dayContainer) {
-  list-style-image: url("chrome://browser/skin/places/calendar.png");
-  -moz-image-region: auto;
-}
-
-treechildren::-moz-tree-image(title, query, hostContainer) {
-  list-style-image: url("chrome://global/skin/icons/folder-item.png");
-  -moz-image-region: rect(0px, 32px, 16px, 16px);
-}
-
-treechildren::-moz-tree-image(title, query, hostContainer, open) {
-  list-style-image: url("chrome://global/skin/icons/folder-item.png");
-  -moz-image-region: rect(16px, 32px, 32px, 16px);
-}
-
-treechildren::-moz-tree-image(title, query, OrganizerQuery_History) {
-  list-style-image: url("chrome://browser/skin/places/history.png");
-}
-
-/* We want some queries to look like ordinary folders. This must come
-   after the (title, query) selector, or it would get overridden. */
-treechildren::-moz-tree-image(title, query, folder) {
-  list-style-image: url("chrome://global/skin/icons/folder-item.png");
-  -moz-image-region: rect(0px, 32px, 16px, 16px);
-}
-
-treechildren::-moz-tree-image(title, query, folder, open) {
-  -moz-image-region: rect(16px, 32px, 32px, 16px);
-}
-
-treechildren::-moz-tree-image(cutting) {
-  opacity: 0.5;
-}
-
-treechildren::-moz-tree-cell-text(cutting) {
-  opacity: 0.7;
-}
-
-/* Browser Sidebars */
-
-/* Default button vert. margins are 1px/2px, and this can cause misalignment */
-#viewButton {
-  margin-top: 2px;
-  margin-bottom: 2px;
-}
-
-#viewButton > .button-box > .button-menu-dropmarker {
-  height: auto;
-  width: auto;
-  margin-inline-end: -3px;
-}
diff --git a/browser/themes/windows/places/query.png b/browser/themes/windows/places/query.png
deleted file mode 100644
index 18b65bd71..000000000
--- a/browser/themes/windows/places/query.png
+++ /dev/null
diff --git a/browser/themes/windows/places/starred48.png b/browser/themes/windows/places/starred48.png
deleted file mode 100644
index be9afdf3f..000000000
--- a/browser/themes/windows/places/starred48.png
+++ /dev/null
diff --git a/browser/themes/windows/places/tag.png b/browser/themes/windows/places/tag.png
deleted file mode 100644
index ebe70a6b9..000000000
--- a/browser/themes/windows/places/tag.png
+++ /dev/null
diff --git a/browser/themes/windows/places/toolbarDropMarker.png b/browser/themes/windows/places/toolbarDropMarker.png
deleted file mode 100644
index 6c1b61d30..000000000
--- a/browser/themes/windows/places/toolbarDropMarker.png
+++ /dev/null
diff --git a/browser/themes/windows/places/unsortedBookmarks.png b/browser/themes/windows/places/unsortedBookmarks.png
deleted file mode 100644
index b8d3e69ab..000000000
--- a/browser/themes/windows/places/unsortedBookmarks.png
+++ /dev/null
diff --git a/browser/themes/windows/places/unstarred48.png b/browser/themes/windows/places/unstarred48.png
deleted file mode 100644
index c287f0c4a..000000000
--- a/browser/themes/windows/places/unstarred48.png
+++ /dev/null
diff --git a/browser/themes/windows/preferences/alwaysAsk.png b/browser/themes/windows/preferences/alwaysAsk.png
deleted file mode 100644
index b2ee5c0ce..000000000
--- a/browser/themes/windows/preferences/alwaysAsk.png
+++ /dev/null
diff --git a/browser/themes/windows/preferences/application.png b/browser/themes/windows/preferences/application.png
deleted file mode 100644
index e4b09204e..000000000
--- a/browser/themes/windows/preferences/application.png
+++ /dev/null
diff --git a/browser/themes/windows/preferences/applications.css b/browser/themes/windows/preferences/applications.css
deleted file mode 100644
index 96ddb7ed0..000000000
--- a/browser/themes/windows/preferences/applications.css
+++ /dev/null
@@ -1,64 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-/**
- * Line up the actions menu with action labels above and below it.
- * Equalize the distance from the left side of the action box to the left side
- * of the icon for both the menu and the non-menu versions of the action box.
- * Also make sure the labels are the same distance away from the icons.
- */
-.actionsMenu {
-  margin-top: 0;
-  margin-bottom: 0;
-  margin-inline-start: -2px;
-  margin-inline-end: 0;
-}
-
-.typeIcon,
-.actionIcon {
-  margin-inline-start: 3px;
-  margin-inline-end: 3px;
-}
-
-#handlersView > richlistitem label {
-  margin-inline-start: 1px;
-  margin-top: 2px;
-}
-
-#handlersView > richlistitem {
-  min-height: 22px;
-}
-
-richlistitem[appHandlerIcon="ask"],
-menuitem[appHandlerIcon="ask"] {
-  list-style-image: url("chrome://browser/skin/preferences/alwaysAsk.png");
-}
-
-richlistitem[appHandlerIcon="save"],
-menuitem[appHandlerIcon="save"] {
-  list-style-image: url("chrome://browser/skin/preferences/application.png");
-}
-
-richlistitem[appHandlerIcon="feed"],
-menuitem[appHandlerIcon="feed"] {
-  list-style-image: url("chrome://browser/skin/page-livemarks.png");
-}
-
-richlistitem[appHandlerIcon="plugin"],
-menuitem[appHandlerIcon="plugin"] {
-  list-style-image: url("chrome://mozapps/skin/plugins/pluginGeneric-16.png");
-}
-
-.actionsMenu .menulist-icon {
-  margin-inline-end: 3px;
-}
-
-.actionsMenu > menupopup > menuitem > .menu-iconic-left {
-  padding-inline-start: 0px;
-  padding-inline-end: 2px;
-}
-
-.actionsMenu > menupopup > menuitem {
-  padding-inline-start: 4px;
-}
diff --git a/browser/themes/windows/preferences/in-content/dialog.css b/browser/themes/windows/preferences/in-content/dialog.css
deleted file mode 100644
index 3b1ae45e0..000000000
--- a/browser/themes/windows/preferences/in-content/dialog.css
+++ /dev/null
@@ -1,19 +0,0 @@
-/* - This Source Code Form is subject to the terms of the Mozilla Public
-   - License, v. 2.0. If a copy of the MPL was not distributed with this file,
-   - You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-%include ../../../shared/incontentprefs/dialog.inc.css
-
-label:not(.menu-text),
-textbox,
-description,
-.tab-text,
-caption > label {
-  font-size: 1.2em;
-}
-
-/* Create a separate rule to unset these styles on .tree-input instead of
-   using :not(.tree-input) so the selector specifity doesn't change. */
-textbox.tree-input {
-  font-size: unset;
-}
diff --git a/browser/themes/windows/preferences/in-content/preferences.css b/browser/themes/windows/preferences/in-content/preferences.css
deleted file mode 100644
index 5ba7c49a4..000000000
--- a/browser/themes/windows/preferences/in-content/preferences.css
+++ /dev/null
@@ -1,64 +0,0 @@
-/* - This Source Code Form is subject to the terms of the Mozilla Public
-   - License, v. 2.0. If a copy of the MPL was not distributed with this file,
-   - You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-%include ../../../shared/incontentprefs/preferences.inc.css
-
-@media not all and (-moz-windows-default-theme) {
-  #category-general > .category-icon {
-    list-style-image: url("chrome://browser/skin/preferences/in-content/icons.svg#general-native");
-  }
-
-  #category-search > .category-icon {
-    list-style-image: url("chrome://browser/skin/preferences/in-content/icons.svg#search-native");
-  }
-
-  #category-content > .category-icon {
-    list-style-image: url("chrome://browser/skin/preferences/in-content/icons.svg#content-native");
-  }
-
-  #category-application > .category-icon {
-    list-style-image: url("chrome://browser/skin/preferences/in-content/icons.svg#applications-native");
-  }
-
-  #category-privacy > .category-icon {
-    list-style-image: url("chrome://browser/skin/preferences/in-content/icons.svg#privacy-native");
-  }
-
-  #category-security > .category-icon {
-    list-style-image: url("chrome://browser/skin/preferences/in-content/icons.svg#security-native");
-  }
-
-  #category-sync > .category-icon {
-    list-style-image: url("chrome://browser/skin/preferences/in-content/icons.svg#sync-native");
-  }
-
-  #category-advanced > .category-icon {
-    list-style-image: url("chrome://browser/skin/preferences/in-content/icons.svg#advanced-native");
-  }
-}
-
-.actionsMenu > .menulist-label-box > .menulist-icon {
-  margin-inline-end: 9px;
-}
-
-textbox + button,
-filefield + button {
-  margin-inline-start: -4px;
-}
-
-#advancedPrefs {
-  padding-bottom: 0; /* override padding from normal preferences.css */
-}
-
-#fxaProfileImage {
-  -moz-user-focus: normal;
-}
-
-/**
- * Dialog
- */
-
-#dialogTitle {
-  font-size: 1em;
-}
diff --git a/browser/themes/windows/preferences/preferences.css b/browser/themes/windows/preferences/preferences.css
deleted file mode 100644
index bd1ec3083..000000000
--- a/browser/themes/windows/preferences/preferences.css
+++ /dev/null
@@ -1,103 +0,0 @@
-/*
-# -*- Mode: Java; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
-# This Source Code Form is subject to the terms of the Mozilla Public
-# License, v. 2.0. If a copy of the MPL was not distributed with this
-# file, You can obtain one at http://mozilla.org/MPL/2.0/.
-*/
-
-/* General Pane */
-
-#useFirefoxSync,
-#getStarted {
-  font-size: 90%;
-}
-
-#isNotDefaultLabel {
-  font-weight: bold;
-}
-
-/* Content Pane */
-#translationAttributionImage {
-  width: 70px;
-  cursor: pointer;
-}
-
-/* Modeless Window Dialogs */
-.windowDialog,
-.windowDialog prefpane {
-  padding: 0;
-}
-
-.contentPane {
-  margin: 9px 8px 5px;
-}
-
-.actionButtons {
-  margin: 0 3px 6px !important;
-}
-
-/* Cookies Manager */
-#cookiesChildren::-moz-tree-image(domainCol) {
-  width: 16px;
-  height: 16px;
-  margin: 0 2px;
-  list-style-image: url("chrome://mozapps/skin/places/defaultFavicon.png") !important;
-}
-
-#cookiesChildren::-moz-tree-image(domainCol, container) {
-  list-style-image: url("chrome://global/skin/icons/folder-item.png") !important;
-  -moz-image-region: rect(0, 32px, 16px, 16px);
-}
-
-#cookiesChildren::-moz-tree-image(domainCol, container, open) {
-  -moz-image-region: rect(16px, 32px, 32px, 16px);
-}
-
-#cookieInfoBox {
-  border: 1px solid ThreeDShadow;
-  border-radius: 0;
-  margin: 4px;
-  padding: 0;
-}
-
-/* Advanced Pane */
-
-/* Adding padding-bottom prevents the bottom of the tabpanel from being cutoff
-   when browser.preferences.animateFadeIn = true */
-#advancedPrefs {
-  padding-bottom: 8px;
-}
-
-/* bottom-most box containing a groupbox in a prefpane. Prevents the bottom
-   of the groupbox from being cutoff */
-.bottomBox {
-  padding-bottom: 4px;
-}
-
-/* Sync Pane */
-
-#syncDesc {
-  padding: 0 8em;
-}
-
-.syncGroupBox {
-  padding: 10px;
-}
-
-#accountCaptionImage {
-  list-style-image: url("chrome://mozapps/skin/profile/profileicon.png");
-}
-
-#syncAddDeviceLabel {
-  margin-top: 1em;
-  margin-bottom: 1em;
-}
-
-#noFxaAccount {
-  margin: 6px;
-  line-height: 1.2em;
-}
-
-#noFxaAccount > label:first-child {
-  margin-bottom: 0.6em;
-}
diff --git a/browser/themes/windows/preferences/saveFile.png b/browser/themes/windows/preferences/saveFile.png
deleted file mode 100644
index ca4b12589..000000000
--- a/browser/themes/windows/preferences/saveFile.png
+++ /dev/null
diff --git a/browser/themes/windows/privatebrowsing-mask-tabstrip-win7.png b/browser/themes/windows/privatebrowsing-mask-tabstrip-win7.png
deleted file mode 100644
index bd5d46a76..000000000
--- a/browser/themes/windows/privatebrowsing-mask-tabstrip-win7.png
+++ /dev/null
diff --git a/browser/themes/windows/privatebrowsing-mask-tabstrip.png b/browser/themes/windows/privatebrowsing-mask-tabstrip.png
deleted file mode 100644
index e2eba8b89..000000000
--- a/browser/themes/windows/privatebrowsing-mask-tabstrip.png
+++ /dev/null
diff --git a/browser/themes/windows/privatebrowsing-mask-titlebar-win7-tall.png b/browser/themes/windows/privatebrowsing-mask-titlebar-win7-tall.png
deleted file mode 100644
index 4a723c54e..000000000
--- a/browser/themes/windows/privatebrowsing-mask-titlebar-win7-tall.png
+++ /dev/null
diff --git a/browser/themes/windows/privatebrowsing-mask-titlebar-win7.png b/browser/themes/windows/privatebrowsing-mask-titlebar-win7.png
deleted file mode 100644
index 835912b53..000000000
--- a/browser/themes/windows/privatebrowsing-mask-titlebar-win7.png
+++ /dev/null
diff --git a/browser/themes/windows/privatebrowsing-mask-titlebar.png b/browser/themes/windows/privatebrowsing-mask-titlebar.png
deleted file mode 100644
index 111dc7d04..000000000
--- a/browser/themes/windows/privatebrowsing-mask-titlebar.png
+++ /dev/null
diff --git a/browser/themes/windows/reload-stop-go-win7.png b/browser/themes/windows/reload-stop-go-win7.png
deleted file mode 100644
index 3ef32c3ce..000000000
--- a/browser/themes/windows/reload-stop-go-win7.png
+++ /dev/null
diff --git a/browser/themes/windows/reload-stop-go-win7@2x.png b/browser/themes/windows/reload-stop-go-win7@2x.png
deleted file mode 100644
index 38b27bf0c..000000000
--- a/browser/themes/windows/reload-stop-go-win7@2x.png
+++ /dev/null
diff --git a/browser/themes/windows/reload-stop-go.png b/browser/themes/windows/reload-stop-go.png
deleted file mode 100644
index 8b3f398c0..000000000
--- a/browser/themes/windows/reload-stop-go.png
+++ /dev/null
diff --git a/browser/themes/windows/reload-stop-go@2x.png b/browser/themes/windows/reload-stop-go@2x.png
deleted file mode 100644
index f116eb98f..000000000
--- a/browser/themes/windows/reload-stop-go@2x.png
+++ /dev/null
diff --git a/browser/themes/windows/sanitizeDialog.css b/browser/themes/windows/sanitizeDialog.css
deleted file mode 100644
index 58e1f2983..000000000
--- a/browser/themes/windows/sanitizeDialog.css
+++ /dev/null
@@ -1,93 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-#sanitizeDurationChoice {
-  margin-inline-end: 0;
-}
-
-/* Align the duration label with the warning box and item list */
-#sanitizeDurationLabel {
-  margin-inline-start: 3px;
-}
-
-
-/* Hide the duration dropdown suffix label if it's empty.  Otherwise it
-   takes up a little space, causing the end of the dropdown to not be aligned
-   with the warning box. */
-#sanitizeDurationSuffixLabel[value=""] {
-  display: none;
-}
-
-
-/* Places tree */
-#placesTreechildren::-moz-tree-row(selected),
-#placesTreechildren::-moz-tree-row(grippyRow) {
-  background: #999;
-}
-
-#placesTreechildren::-moz-tree-cell-text(selected) {
-  color: #111;
-}
-
-
-/* Sanitize everything warning box */
-#sanitizeEverythingWarningBox {
-  background-color: Window;
-  border: 1px solid ThreeDDarkShadow;
-  border-radius: 5px;
-  padding: 16px;
-}
-
-#sanitizeEverythingWarningIcon {
-  list-style-image: url("chrome://global/skin/icons/warning-large.png");
-  padding: 0;
-  margin: 0;
-}
-
-#sanitizeEverythingWarningDescBox {
-  padding: 0 16px;
-  margin: 0;
-}
-
-
-/* Progressive disclosure button */
-#detailsExpanderWrapper {
-  padding: 0;
-  margin: 6px 0;
-}
-
-.expander-up,
-.expander-down {
-  min-width: 0;
-  margin: 0;
-}
-
-.expander-up > .button-box,
-.expander-down > .button-box {
-  padding: 0;
-}
-
-.expander-up {
-  list-style-image: url("chrome://global/skin/icons/collapse.png");
-}
-
-.expander-down {
-  list-style-image: url("chrome://global/skin/icons/expand.png");
-}
-
-
-/* Make the item list the same width as the warning box */
-#itemList {
-  margin-inline-start: 0;
-  margin-inline-end: 0;
-}
-
-
-/* Align the last dialog button with the end of the warning box */
-.prefWindow-dlgbuttons {
-  margin-inline-end: 0;
-}
-.dialog-button[dlgtype="cancel"] {
-  margin-inline-end: 0;
-}
diff --git a/browser/themes/windows/searchbar.css b/browser/themes/windows/searchbar.css
deleted file mode 100644
index ef24f7c5e..000000000
--- a/browser/themes/windows/searchbar.css
+++ /dev/null
@@ -1,328 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-#PopupSearchAutoComplete {
-  /* JS code forces the panel to have the width of the searchbar rather than
-   * the width of the textfield. Alignment of the panel with the searchbar is
-   * obtained with negative margins here: margin-inline-start when the text
-   * field is in the same direction as the rest of the UI, margin-inline-end
-   * when the textfield's direction has been reversed.
-   * (eg. using ctrl+shift+X) */
-  margin-inline-start: -25px;
-  margin-inline-end: -18px;
-}
-
-.autocomplete-textbox-container {
-  -moz-box-align: stretch;
-}
-
-.textbox-input-box {
-  margin: 0;
-}
-
-/* ::::: searchbar-engine-button ::::: */
-
-.searchbar-engine-image {
-  height: 16px;
-  width: 16px;
-  list-style-image: url("chrome://mozapps/skin/places/defaultFavicon.png");
-  margin-inline-start: -1px;
-}
-
-/* ::::: search-go-button ::::: */
-
-.search-go-container {
-  -moz-box-align: center;
-}
-
-.search-go-button {
-  padding: 1px;
-  list-style-image: url("chrome://browser/skin/reload-stop-go.png");
-  -moz-image-region: rect(0, 42px, 14px, 28px);
-  width: 14px;
-}
-
-.search-go-button:-moz-locale-dir(rtl) {
-  transform: scaleX(-1);
-}
-
-.search-go-button:hover {
-  -moz-image-region: rect(14px, 42px, 28px, 28px);
-}
-
-.search-go-button:hover:active {
-  -moz-image-region: rect(28px, 42px, 42px, 28px);
-}
-
-
-.searchbar-search-button-container {
-  -moz-box-align: center;
-}
-
-.searchbar-search-button {
-  list-style-image: url("chrome://browser/skin/search-indicator.png");
-  -moz-image-region: rect(0, 20px, 20px, 0);
-  margin-top: 1px;
-  margin-bottom: 1px;
-  margin-inline-start: 4px;
-  width: 20px;
-}
-
-.searchbar-search-button[addengines="true"] {
-  list-style-image: url("chrome://browser/skin/search-indicator-badge-add.png");
-}
-
-.searchbar-search-button:hover {
-  -moz-image-region: rect(0, 40px, 20px, 20px);
-}
-
-.searchbar-search-button:hover:active {
-  -moz-image-region: rect(0, 60px, 20px, 40px);
-}
-
-@media (min-resolution: 1.1dppx) {
-  .searchbar-engine-image {
-    list-style-image: url("chrome://mozapps/skin/places/defaultFavicon@2x.png");
-  }
-
-  .searchbar-search-button {
-    list-style-image: url("chrome://browser/skin/search-indicator@2x.png");
-    -moz-image-region: rect(0, 40px, 40px, 0);
-  }
-
-  .searchbar-search-button[addengines="true"] {
-    list-style-image: url("chrome://browser/skin/search-indicator-badge-add@2x.png");
-  }
-
-  .searchbar-search-button:hover {
-    -moz-image-region: rect(0, 80px, 40px, 40px);
-  }
-
-  .searchbar-search-button:hover:active {
-    -moz-image-region: rect(0, 120px, 40px, 80px);
-  }
-
-  .search-go-button {
-    list-style-image: url("chrome://browser/skin/reload-stop-go@2x.png");
-    -moz-image-region: rect(0, 84px, 28px, 56px);
-  }
-
-  .search-go-button:hover {
-    -moz-image-region: rect(28px, 84px, 56px, 56px);
-  }
-
-  .search-go-button:hover:active {
-    -moz-image-region: rect(56px, 84px, 84px, 56px);
-  }
-}
-
-.search-panel-current-engine {
-  -moz-box-align: center;
-}
-
-/**
- * The borders of the various elements are specified as follows.
- *
- * The current engine always has a bottom border.
- * The search results never have a border.
- *
- * When the search results are not collapsed:
- * - The elements underneath the search results all have a top border.
- *
- * When the search results are collapsed:
- * - The elements underneath the search results all have a bottom border, except
- *   the lowest one: search-setting-button.
- */
-
-.search-panel-current-engine {
-  border-top: none !important;
-  border-bottom: 1px solid var(--panel-separator-color) !important;
-}
-
-.search-panel-tree[collapsed=true] + .search-one-offs > .search-panel-header,
-.search-panel-tree[collapsed=true] + .search-one-offs > .search-panel-one-offs,
-.search-panel-tree[collapsed=true] + .search-one-offs > vbox > .addengine-item:first-of-type {
-  border-top: none !important;
-}
-
-.search-panel-tree[collapsed=true] + .search-one-offs > .searchbar-engine-one-off-item,
-.search-panel-tree[collapsed=true] + .search-one-offs > .search-panel-current-input,
-.search-panel-tree[collapsed=true] + .search-one-offs > .search-panel-one-offs,
-.search-panel-tree[collapsed=true] + .search-one-offs > vbox > .addengine-item:last-of-type {
-  border-bottom: 1px solid var(--panel-separator-color) !important;
-}
-
-.search-panel-header {
-  font-weight: normal;
-  background-color: var(--arrowpanel-dimmed);
-  border: none;
-  border-top: 1px solid var(--panel-separator-color);
-  margin: 0;
-  padding: 3px 6px;
-  color: GrayText;
-}
-
-.search-panel-header > label {
-  margin-top: 2px !important;
-  margin-bottom: 1px !important;
-}
-
-.search-panel-current-input > label {
-  margin: 2px 0 1px !important;
-}
-
-.search-panel-input-value {
-  color: -moz-fieldtext;
-}
-
-.search-panel-one-offs {
-  margin: 0 !important;
-  border-top: 1px solid var(--panel-separator-color);
-  line-height: 0;
-}
-
-.searchbar-engine-one-off-item {
-  -moz-appearance: none;
-  display: inline-block;
-  border: none;
-  min-width: 48px;
-  height: 32px;
-  margin: 0;
-  padding: 0;
-  background: linear-gradient(transparent 15%, var(--panel-separator-color) 15%, var(--panel-separator-color) 85%, transparent 85%);
-  background-size: 1px auto;
-  background-repeat: no-repeat;
-  background-position: right center;
-  color: GrayText;
-}
-
-.searchbar-engine-one-off-item:-moz-locale-dir(rtl) {
-  background-position: left center;
-}
-
-.searchbar-engine-one-off-item:not(.last-row) {
-  box-sizing: content-box;
-  border-bottom: 1px solid var(--panel-separator-color);
-}
-
-.search-setting-button-compact {
-  border-bottom: none !important;
-}
-
-.search-panel-one-offs:not([compact=true]) > .searchbar-engine-one-off-item.last-of-row,
-.search-panel-one-offs[compact=true] > .searchbar-engine-one-off-item.last-of-row:not(.dummy),
-.search-panel-one-offs[compact=true] > .searchbar-engine-one-off-item.dummy:not(.last-of-row),
-.search-panel-one-offs[compact=true] > .searchbar-engine-one-off-item.last-engine,
-.search-setting-button-compact {
-  background-image: none;
-}
-
-.searchbar-engine-one-off-item[selected] {
-  background-color: Highlight;
-  background-image: none;
-  color: HighlightText;
-}
-
-.searchbar-engine-one-off-item > .button-box {
-  border: none;
-  padding: 0;
-}
-
-.searchbar-engine-one-off-item > .button-box > .button-text {
-  display: none;
-}
-
-.searchbar-engine-one-off-item > .button-box > .button-icon {
-  width: 16px;
-  height: 16px;
-}
-
-.addengine-item {
-  -moz-appearance: none;
-  border: none;
-  height: 32px;
-  margin: 0;
-  padding: 0 10px;
-}
-
-.addengine-item > .button-box {
-  -moz-box-pack: start;
-}
-
-.addengine-item:first-of-type {
-  border-top: 1px solid var(--panel-separator-color);
-}
-
-.addengine-item[selected] {
-  background-color: Highlight;
-  color: HighlightText;
-}
-
-.addengine-icon {
-  width: 16px;
-}
-
-.addengine-badge {
-  width: 16px;
-  height: 16px;
-  margin: -7px -9px 7px 9px;
-  list-style-image: url("chrome://browser/skin/badge-add-engine.png");
-}
-
-.addengine-item > .button-box > .button-text {
-  -moz-box-flex: 1;
-  text-align: start;
-  padding-inline-start: 10px;
-}
-
-.addengine-item:not([image]) {
-  list-style-image: url("chrome://browser/skin/search-engine-placeholder.png");
-}
-
-@media (min-resolution: 1.1dppx) {
-  .addengine-badge {
-    list-style-image: url("chrome://browser/skin/badge-add-engine@2x.png");
-  }
-
-  .addengine-item:not([image]) {
-    list-style-image: url("chrome://browser/skin/search-engine-placeholder@2x.png");
-  }
-}
-
-.search-panel-tree > .autocomplete-treebody::-moz-tree-cell {
-  border-top: none !important;
-}
-
-.search-panel-tree > .autocomplete-treebody::-moz-tree-cell-text {
-  padding-inline-start: 4px;
-}
-
-.search-panel-tree > .autocomplete-treebody::-moz-tree-image {
-  padding-inline-start: 5px;
-  width: 14px;
-  height: 14px;
-}
-
-.search-panel-tree > .autocomplete-treebody::-moz-tree-image(fromhistory) {
-  list-style-image: url("chrome://browser/skin/search-history-icon.svg#search-history-icon");
-}
-
-.search-panel-tree > .autocomplete-treebody::-moz-tree-image(fromhistory, selected) {
-  list-style-image: url("chrome://browser/skin/search-history-icon.svg#search-history-icon-active");
-}
-
-.search-setting-button {
-  -moz-appearance: none;
-  min-height: 32px;
-}
-
-.search-setting-button[selected] {
-  background-color: var(--arrowpanel-dimmed-further);
-}
-
-.search-setting-button-compact > .button-box > .button-icon {
-  list-style-image: url("chrome://browser/skin/gear.svg");
-  filter: url(chrome://browser/skin/filters.svg#fill);
-  fill: currentColor;
-}
diff --git a/browser/themes/windows/setDesktopBackground.css b/browser/themes/windows/setDesktopBackground.css
deleted file mode 100644
index 585284c7b..000000000
--- a/browser/themes/windows/setDesktopBackground.css
+++ /dev/null
@@ -1,18 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-@namespace url("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul");
-@namespace html url("http://www.w3.org/1999/xhtml");
-
-html|canvas#screen {
-  margin: 12px 11px 32px;
-}
-
-#monitor {
-  list-style-image: url("chrome://browser/skin/monitor.png");
-}
-
-#monitor[aspectratio="16:10"] {
-  list-style-image: url("chrome://browser/skin/monitor_16-10.png");
-}
diff --git a/browser/themes/windows/slowStartup-16.png b/browser/themes/windows/slowStartup-16.png
deleted file mode 100644
index 6d09fa99d..000000000
--- a/browser/themes/windows/slowStartup-16.png
+++ /dev/null
diff --git a/browser/themes/windows/sync-128.png b/browser/themes/windows/sync-128.png
deleted file mode 100644
index 0647fb080..000000000
--- a/browser/themes/windows/sync-128.png
+++ /dev/null
diff --git a/browser/themes/windows/sync-16.png b/browser/themes/windows/sync-16.png
deleted file mode 100644
index 63cd02a8b..000000000
--- a/browser/themes/windows/sync-16.png
+++ /dev/null
diff --git a/browser/themes/windows/sync-32.png b/browser/themes/windows/sync-32.png
deleted file mode 100644
index 0e9c0dfd3..000000000
--- a/browser/themes/windows/sync-32.png
+++ /dev/null
diff --git a/browser/themes/windows/sync-bg.png b/browser/themes/windows/sync-bg.png
deleted file mode 100644
index 893a27d76..000000000
--- a/browser/themes/windows/sync-bg.png
+++ /dev/null
diff --git a/browser/themes/windows/sync-horizontalbar-win7.png b/browser/themes/windows/sync-horizontalbar-win7.png
deleted file mode 100644
index 2c97ce6db..000000000
--- a/browser/themes/windows/sync-horizontalbar-win7.png
+++ /dev/null
diff --git a/browser/themes/windows/sync-horizontalbar-win7@2x.png b/browser/themes/windows/sync-horizontalbar-win7@2x.png
deleted file mode 100644
index ee117ab73..000000000
--- a/browser/themes/windows/sync-horizontalbar-win7@2x.png
+++ /dev/null
diff --git a/browser/themes/windows/sync-horizontalbar.png b/browser/themes/windows/sync-horizontalbar.png
deleted file mode 100644
index cabbb7bce..000000000
--- a/browser/themes/windows/sync-horizontalbar.png
+++ /dev/null
diff --git a/browser/themes/windows/sync-horizontalbar@2x.png b/browser/themes/windows/sync-horizontalbar@2x.png
deleted file mode 100644
index fadb57586..000000000
--- a/browser/themes/windows/sync-horizontalbar@2x.png
+++ /dev/null
diff --git a/browser/themes/windows/sync-notification-24.png b/browser/themes/windows/sync-notification-24.png
deleted file mode 100644
index fa2476c7b..000000000
--- a/browser/themes/windows/sync-notification-24.png
+++ /dev/null
diff --git a/browser/themes/windows/syncCommon.css b/browser/themes/windows/syncCommon.css
deleted file mode 100644
index 862cc404d..000000000
--- a/browser/themes/windows/syncCommon.css
+++ /dev/null
@@ -1,55 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-/* The following are used by both sync/setup.xul and sync/genericChange.xul */
-.status {
-  color: -moz-dialogtext;
-}
-
-.statusIcon {
-  margin-inline-start: 4px;
-  max-height: 16px;
-  max-width: 16px;
-}
-
-.statusIcon[status="active"] {
-  list-style-image: url("chrome://global/skin/icons/loading.png");
-}
-
-@media (min-resolution: 1.1dppx) {
-  .statusIcon[status="active"] {
-    list-style-image: url("chrome://global/skin/icons/loading@2x.png");
-  }
-}
-
-.statusIcon[status="error"] {
-  list-style-image: url("chrome://global/skin/icons/error-16.png");
-}
-
-.statusIcon[status="success"] {
-  list-style-image: url("chrome://global/skin/icons/information-16.png");
-}
-
-/* .data is only used by sync/genericChange.xul, but it seems unnecessary to have
-   a separate stylesheet for it. */
-.data {
-  font-size: 90%;
-  font-weight: bold;
-}
-
-dialog#change-dialog {
-  width: 40em;
-}
-
-image#syncIcon {
-  list-style-image: url("chrome://browser/skin/sync-32.png");
-}
-
-#introText {
-  margin-top: 2px;
-}
-
-#feedback {
-  height: 2em;
-}
diff --git a/browser/themes/windows/syncProgress-horizontalbar-win7.png b/browser/themes/windows/syncProgress-horizontalbar-win7.png
deleted file mode 100644
index 48cd11055..000000000
--- a/browser/themes/windows/syncProgress-horizontalbar-win7.png
+++ /dev/null
diff --git a/browser/themes/windows/syncProgress-horizontalbar-win7@2x.png b/browser/themes/windows/syncProgress-horizontalbar-win7@2x.png
deleted file mode 100644
index 741dd2ed4..000000000
--- a/browser/themes/windows/syncProgress-horizontalbar-win7@2x.png
+++ /dev/null
diff --git a/browser/themes/windows/syncProgress-horizontalbar.png b/browser/themes/windows/syncProgress-horizontalbar.png
deleted file mode 100644
index 79d972389..000000000
--- a/browser/themes/windows/syncProgress-horizontalbar.png
+++ /dev/null
diff --git a/browser/themes/windows/syncProgress-horizontalbar@2x.png b/browser/themes/windows/syncProgress-horizontalbar@2x.png
deleted file mode 100644
index e1de4763d..000000000
--- a/browser/themes/windows/syncProgress-horizontalbar@2x.png
+++ /dev/null
diff --git a/browser/themes/windows/syncProgress-menuPanel.png b/browser/themes/windows/syncProgress-menuPanel.png
deleted file mode 100644
index 6fd6f9c16..000000000
--- a/browser/themes/windows/syncProgress-menuPanel.png
+++ /dev/null
diff --git a/browser/themes/windows/syncProgress-menuPanel@2x.png b/browser/themes/windows/syncProgress-menuPanel@2x.png
deleted file mode 100644
index 04b2cae00..000000000
--- a/browser/themes/windows/syncProgress-menuPanel@2x.png
+++ /dev/null
diff --git a/browser/themes/windows/syncProgress-toolbar-inverted.png b/browser/themes/windows/syncProgress-toolbar-inverted.png
deleted file mode 100644
index 4ede4387d..000000000
--- a/browser/themes/windows/syncProgress-toolbar-inverted.png
+++ /dev/null
diff --git a/browser/themes/windows/syncProgress-toolbar-inverted@2x.png b/browser/themes/windows/syncProgress-toolbar-inverted@2x.png
deleted file mode 100644
index eee4a5dd0..000000000
--- a/browser/themes/windows/syncProgress-toolbar-inverted@2x.png
+++ /dev/null
diff --git a/browser/themes/windows/syncProgress-toolbar-win7.png b/browser/themes/windows/syncProgress-toolbar-win7.png
deleted file mode 100644
index 49e224f0d..000000000
--- a/browser/themes/windows/syncProgress-toolbar-win7.png
+++ /dev/null
diff --git a/browser/themes/windows/syncProgress-toolbar-win7@2x.png b/browser/themes/windows/syncProgress-toolbar-win7@2x.png
deleted file mode 100644
index fd2038725..000000000
--- a/browser/themes/windows/syncProgress-toolbar-win7@2x.png
+++ /dev/null
diff --git a/browser/themes/windows/syncProgress-toolbar.png b/browser/themes/windows/syncProgress-toolbar.png
deleted file mode 100644
index 05078a9c8..000000000
--- a/browser/themes/windows/syncProgress-toolbar.png
+++ /dev/null
diff --git a/browser/themes/windows/syncProgress-toolbar@2x.png b/browser/themes/windows/syncProgress-toolbar@2x.png
deleted file mode 100644
index 4493d7c74..000000000
--- a/browser/themes/windows/syncProgress-toolbar@2x.png
+++ /dev/null
diff --git a/browser/themes/windows/syncQuota.css b/browser/themes/windows/syncQuota.css
deleted file mode 100644
index 1577de8a3..000000000
--- a/browser/themes/windows/syncQuota.css
+++ /dev/null
@@ -1,26 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-#quotaDialog {
-  width: 33em;
-  height: 25em;
-}
-
-treechildren::-moz-tree-checkbox {
-  list-style-image: none;
-}
-treechildren::-moz-tree-checkbox(checked) {
-  list-style-image: url("chrome://global/skin/checkbox/cbox-check.gif");
-}
-treechildren::-moz-tree-checkbox(disabled) {
-  list-style-image: url("chrome://global/skin/checkbox/cbox-check-dis.gif");
-}
-
-#treeCaption {
-  height: 4em;
-}
-
-.captionWarning {
-  font-weight: bold;
-}
diff --git a/browser/themes/windows/syncSetup.css b/browser/themes/windows/syncSetup.css
deleted file mode 100644
index 67335d87d..000000000
--- a/browser/themes/windows/syncSetup.css
+++ /dev/null
@@ -1,145 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-wizard {
-  -moz-appearance: none;
-  width: 55em;
-  height: 45em;
-  padding: 0;
-  background-color: Window;
-}
-
-.wizard-page-box {
-  -moz-appearance: none;
-  padding-left: 0;
-  padding-right: 0;
-  margin: 0;
-}
-
-wizardpage {
-  -moz-box-pack: center;
-  -moz-box-align: center;
-  margin: 0;
-  padding: 0 6em;
-  background-color: Window;
-}
-
-.wizard-header {
-  -moz-appearance: none;
-  border: none;
-  padding: 2em 0 1em 0;
-  text-align: center;
-}
-.wizard-header-label {
-  font-size: 24pt;
-  font-weight: normal;
-}
-
-.wizard-buttons {
-  background-color: rgba(0,0,0,0.1);
-  padding: 1em;
-}
-
-.wizard-buttons-separator {
-  visibility: collapse;
-}
-
-.wizard-header-icon {
-  visibility: collapse;
-}
-
-.accountChoiceButton {
-  font: menu;
-}
-
-.confirm {
-  border: 1px solid black;
-  padding: 1em;
-  border-radius: 5px;
-}
-
-/* Override the text-link style from global.css */
-description > .text-link,
-description > .text-link:focus {
-  margin: 0px;
-  padding: 0px;
-  border: 0px;
-}
-
-
-.success,
-.error {
-  padding: 2px;
-  border-radius: 2px;
-}
-
-.error {
-  background-color: #FF0000 !important;
-  color: #FFFFFF !important;
-}
-
-.success {
-  background-color: #00FF00 !important;
-}
-
-.warning {
-  font-weight: bold;
-  font-size: 100%;
-  color: red;
-}
-
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-  font-weight: bold;
-  font-size: 100%;
-}
-
-.normal {
-  font-size: 100%;
-}
-
-.inputColumn {
-  margin-inline-end: 2px
-}
-
-.pin {
-  font-size: 18pt;
-  width: 4em;
-  text-align: center; 
-}
-
-#passphraseHelpSpacer {
-  width: 0.5em;
-}
-
-#pairDeviceThrobber,
-#login-throbber {
-  -moz-box-align: center;
-}
-
-#pairDeviceThrobber > image,
-#login-throbber > image {
-  width: 16px;
-  list-style-image: url("chrome://global/skin/icons/loading.png");
-}
-
-@media (min-resolution: 1.1dppx) {
-  #pairDeviceThrobber > image,
-  #login-throbber > image {
-    list-style-image: url("chrome://global/skin/icons/loading@2x.png");
-  }
-}
-
-#captchaFeedback {
-  visibility: hidden;
-}
-
-#successPageIcon {
-  /* TODO replace this with a 128px version (bug 591122) */
-  list-style-image: url("chrome://browser/skin/sync-32.png");
-}
-
-#tosDesc {
-  margin-left: -7px;
-  margin-bottom: 3px;
-}
\ No newline at end of file
diff --git a/browser/themes/windows/syncedtabs/sidebar.css b/browser/themes/windows/syncedtabs/sidebar.css
deleted file mode 100644
index 6473206bc..000000000
--- a/browser/themes/windows/syncedtabs/sidebar.css
+++ /dev/null
@@ -1,132 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-%include ../../shared/syncedtabs/sidebar.inc.css
-
-/* These styles are intended to mimic XUL trees and the XUL search box. */
-
-html {
-  background-color: #EEF3FA;
-}
-
-.item {
-  padding-inline-end: 0;
-}
-
-.item-title {
-  margin: 1px 0 0;
-}
-
-.item-title {
-  margin-inline-end: 6px;
-}
-
-.search-box {
-  -moz-appearance: textfield;
-  cursor: text;
-  margin: 2px 4px;
-  padding: 2px 2px 3px;
-  padding-inline-start: 4px;
-  color: -moz-FieldText;
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-
-.textbox-search-icon {
-  width: 16px;
-  height: 16px;
-  background-image: url(chrome://global/skin/icons/Search-glass.png);
-  background-repeat: no-repeat;
-  display: block;
-}
-
-.textbox-search-icon:-moz-locale-dir(rtl) {
-  transform: scaleX(-1);
-}
-
-.textbox-search-icon[searchbutton]:not([disabled]) {
-  cursor: pointer;
-}
-
-.textbox-search-clear {
-  width: 16px;
-  height: 16px;
-  background-image: url(chrome://global/skin/icons/Search-close.png);
-  background-repeat: no-repeat;
-}
-
-.textbox-search-clear:not([disabled]) {
-  cursor: default;
-}
-
-.textbox-search-icon:not([disabled]) {
-  cursor: text;
-}
-
-.textbox-search-clear:not([disabled]):hover ,
-.textbox-search-icon:not([disabled]):hover {
-  background-position: -16px 0;
-}
-
-.textbox-search-clear:not([disabled]):hover:active ,
-.textbox-search-icon:not([disabled]):hover:active {
-  background-position: -32px 0;
-}
-
-.client .item.tab > .item-title-container {
-  padding-inline-start: 26px;
-}
-.item.tab > .item-title-container {
-  padding-inline-start: 14px;
-}
-
-.item-icon-container {
-  min-width: 16px;
-  max-width: 16px;
-  min-height: 16px;
-  max-height: 16px;
-  margin-right: 5px;
-  background-size: 16px 16px;
-  background-repeat: no-repeat;
-  background-position: center;
-}
-
-.item-twisty-container {
-  background-size: contain;
-  background-repeat: no-repeat;
-  background-position: center;
-  padding-top: 5px;
-  min-width: 9px; /* The image's width is 9 pixels */
-  height: 9px;
-}
-
-.item.client .item-twisty-container {
-  background-image: url("chrome://global/skin/tree/twisty.svg#open");
-}
-
-.item.client.closed .item-twisty-container {
-  background-image: url("chrome://global/skin/tree/twisty.svg#clsd");
-}
-
-.item.client .item-twisty-container:hover {
-  background-image: url("chrome://global/skin/tree/twisty.svg#open-hover");
-}
-
-.item.client.closed .item-twisty-container:hover {
-  background-image: url("chrome://global/skin/tree/twisty.svg#clsd-hover");
-}
-
-.item.client .item-twisty-container:dir(rtl) {
-  background-image: url("chrome://global/skin/tree/twisty.svg#open-rtl");
-}
-
-.item.client.closed .item-twisty-container:dir(rtl) {
-  background-image: url("chrome://global/skin/tree/twisty.svg#clsd-rtl");
-}
-
-.item.client .item-twisty-container:hover:dir(rtl) {
-  background-image: url("chrome://global/skin/tree/twisty.svg#open-hover-rtl");
-}
-
-.item.client.closed .item-twisty-container:hover:dir(rtl) {
-  background-image: url("chrome://global/skin/tree/twisty.svg#clsd-hover-rtl");
-}
diff --git a/browser/themes/windows/tabbrowser/newtab-inverted-win7.svg b/browser/themes/windows/tabbrowser/newtab-inverted-win7.svg
deleted file mode 100644
index 10ffbc745..000000000
--- a/browser/themes/windows/tabbrowser/newtab-inverted-win7.svg
+++ /dev/null
@@ -1,13 +0,0 @@
-<!-- This Source Code Form is subject to the terms of the Mozilla Public
-   - License, v. 2.0. If a copy of the MPL was not distributed with this
-   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
-<svg width="16" height="18" xmlns="http://www.w3.org/2000/svg">
-  <g stroke="#666" stroke-width="2" fill="none">
-    <rect x="7" y="4" width="2" height="10" rx="0.25" ry="0.25"/>
-    <rect x="3" y="8" width="10" height="2" rx="0.25" ry="0.25"/>
-  </g>
-  <g fill="#fff">
-    <rect width="2" height="10" x="7" y="4"/>
-    <rect width="10" height="2" x="3" y="8"/>
-  </g>
-</svg>
diff --git a/browser/themes/windows/tabbrowser/newtab-inverted.svg b/browser/themes/windows/tabbrowser/newtab-inverted.svg
deleted file mode 100644
index 2728cda5c..000000000
--- a/browser/themes/windows/tabbrowser/newtab-inverted.svg
+++ /dev/null
@@ -1,13 +0,0 @@
-<!-- This Source Code Form is subject to the terms of the Mozilla Public
-   - License, v. 2.0. If a copy of the MPL was not distributed with this
-   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
-<svg width="16" height="18" xmlns="http://www.w3.org/2000/svg">
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-    <rect x="7" y="3" width="2" height="12" rx="0.25" ry="0.25"/>
-    <rect x="2" y="8" width="12" height="2" rx="0.25" ry="0.25"/>
-  </g>
-  <g fill="#fff">
-    <rect x="7" y="3" width="2" height="12"/>
-    <rect x="2" y="8" width="12" height="2"/>
-  </g>
-</svg>
diff --git a/browser/themes/windows/tabbrowser/newtab-win7.svg b/browser/themes/windows/tabbrowser/newtab-win7.svg
deleted file mode 100644
index 3f431c9db..000000000
--- a/browser/themes/windows/tabbrowser/newtab-win7.svg
+++ /dev/null
@@ -1,16 +0,0 @@
-<!-- This Source Code Form is subject to the terms of the Mozilla Public
-   - License, v. 2.0. If a copy of the MPL was not distributed with this
-   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
-<svg width="16" height="18" xmlns="http://www.w3.org/2000/svg">
-  <defs>
-    <linearGradient id="gradient" x1="0%" x2="0%" y1="0%" y2="100%">
-      <stop offset="0%" stop-color="#1c2835"/>
-      <stop offset="60%" stop-color="#606e7b"/>
-      <stop offset="100%" stop-color="#465765"/>
-    </linearGradient>
-  </defs>
-  <g fill="url(#gradient)">
-    <rect width="10" height="2" x="3" y="8"/>
-    <rect width="2" height="10" x="7" y="4"/>
-  </g>
-</svg>
diff --git a/browser/themes/windows/tabbrowser/newtab.svg b/browser/themes/windows/tabbrowser/newtab.svg
deleted file mode 100644
index 40548da4a..000000000
--- a/browser/themes/windows/tabbrowser/newtab.svg
+++ /dev/null
@@ -1,7 +0,0 @@
-<!-- This Source Code Form is subject to the terms of the Mozilla Public
-   - License, v. 2.0. If a copy of the MPL was not distributed with this
-   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
-<svg width="16" height="18" xmlns="http://www.w3.org/2000/svg" fill="#4c4c4c">
-  <rect x="7" y="3" width="2" height="12"/>
-  <rect x="2" y="8" width="12" height="2"/>
-</svg>
diff --git a/browser/themes/windows/tabbrowser/tab-active-middle.png b/browser/themes/windows/tabbrowser/tab-active-middle.png
deleted file mode 100644
index b7e6d6f77..000000000
--- a/browser/themes/windows/tabbrowser/tab-active-middle.png
+++ /dev/null
diff --git a/browser/themes/windows/tabbrowser/tab-active-middle@2x.png b/browser/themes/windows/tabbrowser/tab-active-middle@2x.png
deleted file mode 100644
index 1e92acbda..000000000
--- a/browser/themes/windows/tabbrowser/tab-active-middle@2x.png
+++ /dev/null
diff --git a/browser/themes/windows/tabbrowser/tab-arrow-left-inverted.svg b/browser/themes/windows/tabbrowser/tab-arrow-left-inverted.svg
deleted file mode 100644
index 13d3beb95..000000000
--- a/browser/themes/windows/tabbrowser/tab-arrow-left-inverted.svg
+++ /dev/null
@@ -1,7 +0,0 @@
-<!-- This Source Code Form is subject to the terms of the Mozilla Public
-   - License, v. 2.0. If a copy of the MPL was not distributed with this
-   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
-<svg width="15" height="17" xmlns="http://www.w3.org/2000/svg">
-  <path fill="#666" stroke-width="1.5" stroke="#666" d="M11 4L9.5 2.5l-5.875 6 5.875 6L11 13 6.625 8.5z"/>
-  <path fill="#fff" d="M11 4L9.5 2.5l-5.875 6 5.875 6L11 13 6.625 8.5z"/>
-</svg>
diff --git a/browser/themes/windows/tabbrowser/tab-arrow-left-win7.svg b/browser/themes/windows/tabbrowser/tab-arrow-left-win7.svg
deleted file mode 100644
index 41bb5ab13..000000000
--- a/browser/themes/windows/tabbrowser/tab-arrow-left-win7.svg
+++ /dev/null
@@ -1,13 +0,0 @@
-<!-- This Source Code Form is subject to the terms of the Mozilla Public
-   - License, v. 2.0. If a copy of the MPL was not distributed with this
-   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
-<svg width="15" height="17" xmlns="http://www.w3.org/2000/svg">
-  <defs>
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-      <stop offset="60%" stop-color="#606e7b"/>
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-  </defs>
-  <path d="M11 4L9.5 2.5l-5.875 6 5.875 6L11 13 6.625 8.5z" fill="url(#gradient)"/>
-</svg>
diff --git a/browser/themes/windows/tabbrowser/tab-arrow-left.svg b/browser/themes/windows/tabbrowser/tab-arrow-left.svg
deleted file mode 100644
index 9bd59ddd3..000000000
--- a/browser/themes/windows/tabbrowser/tab-arrow-left.svg
+++ /dev/null
@@ -1,6 +0,0 @@
-<!-- This Source Code Form is subject to the terms of the Mozilla Public
-   - License, v. 2.0. If a copy of the MPL was not distributed with this
-   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
-<svg width="15" height="17" xmlns="http://www.w3.org/2000/svg">
-  <path d="M11 4L9.5 2.5l-5.875 6 5.875 6L11 13 6.625 8.5z" fill="#4c4c4c"/>
-</svg>
diff --git a/browser/themes/windows/tabbrowser/tab-background-end-preWin10.png b/browser/themes/windows/tabbrowser/tab-background-end-preWin10.png
deleted file mode 100644
index fb353b17e..000000000
--- a/browser/themes/windows/tabbrowser/tab-background-end-preWin10.png
+++ /dev/null
diff --git a/browser/themes/windows/tabbrowser/tab-background-end-preWin10@2x.png b/browser/themes/windows/tabbrowser/tab-background-end-preWin10@2x.png
deleted file mode 100644
index eefb6ac47..000000000
--- a/browser/themes/windows/tabbrowser/tab-background-end-preWin10@2x.png
+++ /dev/null
diff --git a/browser/themes/windows/tabbrowser/tab-background-end.png b/browser/themes/windows/tabbrowser/tab-background-end.png
deleted file mode 100644
index d68ea6da6..000000000
--- a/browser/themes/windows/tabbrowser/tab-background-end.png
+++ /dev/null
diff --git a/browser/themes/windows/tabbrowser/tab-background-end@2x.png b/browser/themes/windows/tabbrowser/tab-background-end@2x.png
deleted file mode 100644
index 8ed84ab37..000000000
--- a/browser/themes/windows/tabbrowser/tab-background-end@2x.png
+++ /dev/null
diff --git a/browser/themes/windows/tabbrowser/tab-background-middle-preWin10.png b/browser/themes/windows/tabbrowser/tab-background-middle-preWin10.png
deleted file mode 100644
index 51e066c2e..000000000
--- a/browser/themes/windows/tabbrowser/tab-background-middle-preWin10.png
+++ /dev/null
diff --git a/browser/themes/windows/tabbrowser/tab-background-middle-preWin10@2x.png b/browser/themes/windows/tabbrowser/tab-background-middle-preWin10@2x.png
deleted file mode 100644
index b26cb95de..000000000
--- a/browser/themes/windows/tabbrowser/tab-background-middle-preWin10@2x.png
+++ /dev/null
diff --git a/browser/themes/windows/tabbrowser/tab-background-middle.png b/browser/themes/windows/tabbrowser/tab-background-middle.png
deleted file mode 100644
index faaf7e38e..000000000
--- a/browser/themes/windows/tabbrowser/tab-background-middle.png
+++ /dev/null
diff --git a/browser/themes/windows/tabbrowser/tab-background-middle@2x.png b/browser/themes/windows/tabbrowser/tab-background-middle@2x.png
deleted file mode 100644
index c9d245f4f..000000000
--- a/browser/themes/windows/tabbrowser/tab-background-middle@2x.png
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deleted file mode 100644
index cf0dc852a..000000000
--- a/browser/themes/windows/tabbrowser/tab-background-start-preWin10.png
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deleted file mode 100644
index bbfc77dd1..000000000
--- a/browser/themes/windows/tabbrowser/tab-background-start-preWin10@2x.png
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deleted file mode 100644
index d1f0b5561..000000000
--- a/browser/themes/windows/tabbrowser/tab-background-start.png
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deleted file mode 100644
index e860275a6..000000000
--- a/browser/themes/windows/tabbrowser/tab-background-start@2x.png
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deleted file mode 100644
index 2aa5711f8..000000000
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index a87002a83..000000000
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deleted file mode 100644
index 4e4e41f63..000000000
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deleted file mode 100644
index 13bd6add1..000000000
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diff --git a/browser/themes/windows/tabbrowser/tabDragIndicator.png b/browser/themes/windows/tabbrowser/tabDragIndicator.png
deleted file mode 100644
index 63c4eccad..000000000
--- a/browser/themes/windows/tabbrowser/tabDragIndicator.png
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deleted file mode 100644
index af4c7af0b..000000000
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diff --git a/browser/themes/windows/toolbarbutton-dropdown-arrow-win7.png b/browser/themes/windows/toolbarbutton-dropdown-arrow-win7.png
deleted file mode 100644
index 5f892f532..000000000
--- a/browser/themes/windows/toolbarbutton-dropdown-arrow-win7.png
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diff --git a/browser/themes/windows/urlbar-history-dropmarker-win7.png b/browser/themes/windows/urlbar-history-dropmarker-win7.png
deleted file mode 100644
index b03338822..000000000
--- a/browser/themes/windows/urlbar-history-dropmarker-win7.png
+++ /dev/null
diff --git a/browser/themes/windows/urlbar-history-dropmarker-win7@2x.png b/browser/themes/windows/urlbar-history-dropmarker-win7@2x.png
deleted file mode 100644
index bff2997f8..000000000
--- a/browser/themes/windows/urlbar-history-dropmarker-win7@2x.png
+++ /dev/null
diff --git a/browser/themes/windows/urlbar-history-dropmarker.png b/browser/themes/windows/urlbar-history-dropmarker.png
deleted file mode 100644
index 01432f7e9..000000000
--- a/browser/themes/windows/urlbar-history-dropmarker.png
+++ /dev/null
diff --git a/browser/themes/windows/urlbar-history-dropmarker@2x.png b/browser/themes/windows/urlbar-history-dropmarker@2x.png
deleted file mode 100644
index 6e710139a..000000000
--- a/browser/themes/windows/urlbar-history-dropmarker@2x.png
+++ /dev/null
diff --git a/browser/themes/windows/urlbar-popup-blocked.png b/browser/themes/windows/urlbar-popup-blocked.png
deleted file mode 100644
index 56dbd2d0d..000000000
--- a/browser/themes/windows/urlbar-popup-blocked.png
+++ /dev/null
diff --git a/browser/themes/windows/webRTC-indicator.css b/browser/themes/windows/webRTC-indicator.css
deleted file mode 100644
index c22f942ec..000000000
--- a/browser/themes/windows/webRTC-indicator.css
+++ /dev/null
@@ -1,116 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-window {
-  border: 1px solid #ff9500;
-}
-
-#audioVideoButton,
-#screenShareButton,
-#firefoxButton {
-  height: 29px;
-  margin: 0;
-  -moz-appearance: none;
-  border-style: none;
-}
-
-#firefoxButton {
-  background-image: url("chrome://branding/content/icon48.png");
-  background-repeat: no-repeat;
-  background-size: 22px;
-  background-position: center center;
-  min-width: 29px;
-  background-color: white;
-}
-
-#firefoxButton:hover {
-  background-color: #f2f2f2;
-}
-
-#screenShareButton {
-  background-image: url("webRTC-screen-white-16.png");
-  background-position: center center;
-  background-repeat: no-repeat;
-  background-size: 16px;
-  min-width: 27px;
-  display: none;
-}
-
-window[sharingscreen] > #screenShareButton {
-  display: -moz-box;
-}
-
-#audioVideoButton {
-  display: none;
-  background-repeat: no-repeat;
-}
-
-/* When screen sharing, need to pull in the separator: */
-window[sharingscreen] > #audioVideoButton {
-  margin-right: -1px;
-}
-
-/* Single icon button: */
-window[sharingvideo] > #audioVideoButton,
-window[sharingaudio] > #audioVideoButton {
-  display: -moz-box;
-  background-position: center center;
-  background-size: 16px;
-  min-width: 26px;
-}
-
-window[sharingvideo] > #audioVideoButton {
-  background-image: url("webRTC-camera-white-16.png");
-}
-
-window[sharingaudio] > #audioVideoButton {
-  background-image: url("webRTC-microphone-white-16.png");
-}
-
-/* Multi-icon button: */
-window[sharingaudio][sharingvideo] > #audioVideoButton {
-  background-image: url("webRTC-camera-white-16.png"),
-                    url("webRTC-microphone-white-16.png");
-  background-position: 6px center, 26px center;
-  background-size: 16px, 16px;
-  min-width: 46px;
-}
-
-/* Hover styles */
-#audioVideoButton,
-#screenShareButton {
-  background-color: #ffaa33;
-}
-
-#audioVideoButton:hover,
-#screenShareButton:hover {
-  background-color: #ff9500;
-}
-
-/* Don't show the dropmarker for the type="menu" case */
-#audioVideoButton > .box-inherit > .button-menu-dropmarker,
-#screenShareButton > .box-inherit > .button-menu-dropmarker {
-  display: none;
-}
-
-/* Separator in case of screen sharing + video/audio sharing */
-#shareSeparator {
-  width: 1px;
-  margin: 4px -1px 4px 0;
-  background-color: #FFCA80;
-  /* Separator needs to show above either button when they're hovered: */
-  position: relative;
-  z-index: 1;
-  display: none;
-}
-
-window[sharingscreen][sharingvideo] > #shareSeparator,
-window[sharingscreen][sharingaudio] > #shareSeparator {
-  display: -moz-box;
-}
-
-:-moz-any(#audioVideoButton, #screenShareButton,
-          #firefoxButton):-moz-focusring > .button-box {
-  border: none;
-}
diff --git a/browser/themes/windows/windowsShared.inc b/browser/themes/windows/windowsShared.inc
deleted file mode 100644
index 199a62292..000000000
--- a/browser/themes/windows/windowsShared.inc
+++ /dev/null
@@ -1,11 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-%filter substitution
-
-%define toolbarHighlight rgba(255,255,255,.4)
-%define fgTabTexture linear-gradient(transparent 2px, @toolbarHighlight@ 2px, @toolbarHighlight@)
-%define fgTabBackgroundColor -moz-dialog
-%define fgTabTextureLWT @fgTabTexture@
-%define customToolbarColor hsl(210,75%,92%)