Add m-esr52 at 52.6.0

7 files changed, 1067 insertions, 0 deletions

diff --git a/toolkit/themes/shared/in-content/check-partial.svg b/toolkit/themes/shared/in-content/check-partial.svg
new file mode 100644
index 000000000..e436abf0d
--- /dev/null
+++ b/toolkit/themes/shared/in-content/check-partial.svg
@@ -0,0 +1,28 @@
+<?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="21" height="21" viewBox="0 0 21 21">
+  <style>
+    use:not(:target) {
+      display: none;
+    }
+    use {
+      fill: #2292d0;
+    }
+    use[id$="-inverted"] {
+      fill: #fff;
+      stroke: #0095dd;
+      stroke-width: 0.5;
+    }
+    use[id$="-native"] {
+      fill: -moz-dialogText;
+    }
+  </style>
+  <defs>
+    <rect id="check-shape" x="3" y="9" width="15" height="3"/>
+  </defs>
+  <use id="check-partial" xlink:href="#check-shape"/>
+  <use id="check-partial-inverted" xlink:href="#check-shape"/>
+  <use id="check-partial-native" xlink:href="#check-shape"/>
+</svg>
diff --git a/toolkit/themes/shared/in-content/check.svg b/toolkit/themes/shared/in-content/check.svg
new file mode 100644
index 000000000..1f9f99cca
--- /dev/null
+++ b/toolkit/themes/shared/in-content/check.svg
@@ -0,0 +1,28 @@
+<?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="21" height="21" viewBox="0 0 21 21">
+  <style>
+    use:not(:target) {
+      display: none;
+    }
+    use {
+      fill: #2292d0;
+    }
+    use[id$="-inverted"] {
+      fill: #fff;
+      stroke: #0095dd;
+      stroke-width: 0.5;
+    }
+    use[id$="-native"] {
+      fill: -moz-dialogText;
+    }
+  </style>
+  <defs>
+    <path id="check-shape" d="M 9.39,16.5 16.28,6 14.77,4.5 9.37,12.7 6.28,9.2 4.7,10.7 z"/>
+  </defs>
+  <use id="check" xlink:href="#check-shape"/>
+  <use id="check-inverted" xlink:href="#check-shape"/>
+  <use id="check-native" xlink:href="#check-shape"/>
+</svg>
diff --git a/toolkit/themes/shared/in-content/common.inc.css b/toolkit/themes/shared/in-content/common.inc.css
new file mode 100644
index 000000000..ecd961d8d
--- /dev/null
+++ b/toolkit/themes/shared/in-content/common.inc.css
@@ -0,0 +1,830 @@
+%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";
+@namespace xul "http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul";
+
+*|*:root {
+  --in-content-page-color: #424e5a;
+  --in-content-page-background: #fbfbfb;
+  --in-content-text-color: #333;
+  --in-content-selected-text: #fff;
+  --in-content-header-border-color: #c8c8c8;
+  --in-content-box-background: #fff;
+  --in-content-box-background-odd: #f3f6fa;
+  --in-content-box-background-hover: #ebebeb;
+  --in-content-box-background-active: #dadada;
+  --in-content-box-border-color: #c1c1c1;
+  --in-content-item-hover: rgba(0,149,221,0.25);
+  --in-content-item-selected: #0095dd;
+  --in-content-border-highlight: #ff9500;
+  --in-content-border-focus: #0095dd;
+  --in-content-border-color: #c1c1c1;
+  --in-content-category-text: #c1c1c1;
+  --in-content-category-border-focus: 1px dotted #fff;
+  --in-content-category-text-selected: #f2f2f2;
+  --in-content-category-background: #424f5a;
+  --in-content-category-background-hover: #5e6972;
+  --in-content-category-background-active: #343f48;
+  --in-content-tab-color: #424f5a;
+  --in-content-link-color: #0095dd;
+  --in-content-link-color-hover: #178ce5;
+  --in-content-link-color-active: #ff9500;
+  --in-content-link-color-visited: #551a8b;
+  --in-content-primary-button-background: #0095dd;
+  --in-content-primary-button-background-hover: #008acb;
+  --in-content-primary-button-background-active: #006b9d;
+  --in-content-table-border-dark-color: #d1d1d1;
+  --in-content-table-header-background: #0095dd;
+}
+
+html|html,
+xul|page,
+xul|window {
+  font: message-box;
+  -moz-appearance: none;
+  background-color: var(--in-content-page-background);
+  color: var(--in-content-page-color);
+}
+
+html|body {
+  font-size: 15px;
+  font-weight: normal;
+  margin: 0;
+}
+
+html|h1 {
+  font-size: 2.5em;
+  font-weight: lighter;
+  line-height: 1.2;
+  color: var(--in-content-text-color);
+  margin: 0;
+  margin-bottom: .5em;
+}
+
+html|hr {
+  border-style: solid none none none;
+  border-color: var(--in-content-border-color);
+}
+
+xul|caption {
+  -moz-appearance: none;
+  margin: 0;
+}
+
+html|h2,
+xul|caption > xul|checkbox,
+xul|caption > xul|label {
+  font-size: 1.3rem;
+  font-weight: bold;
+  line-height: 22px;
+}
+
+xul|caption > xul|checkbox,
+xul|caption > xul|label {
+  margin: 0 !important;
+}
+
+*|*.main-content {
+  padding-top: 40px;
+  padding-inline-end: 44px; /* compensate the 4px margin of child elements */
+  padding-bottom: 48px;
+  padding-inline-start: 48px;
+  overflow: auto;
+}
+
+xul|prefpane > xul|*.content-box {
+  overflow: visible;
+}
+
+/* groupboxes */
+
+xul|groupbox {
+  -moz-appearance: none;
+  border: none;
+  margin: 15px 0 0;
+  padding-inline-start: 0;
+  padding-inline-end: 0;
+  font-size: 1.25rem;
+}
+
+xul|groupbox xul|label:not(.menu-accel):not(.menu-text):not(.indent),
+xul|groupbox xul|description {
+  /* !important needed to override toolkit !important rule */
+  margin-inline-start: 0 !important;
+  margin-inline-end: 0 !important;
+}
+
+/* tabpanels and tabs */
+
+xul|tabpanels {
+  -moz-appearance: none;
+  font-size: 1.25rem;
+  line-height: 22px;
+  border: none;
+  padding: 0;
+  background-color: transparent;
+  color: inherit;
+}
+
+xul|tabs {
+  margin-bottom: 15px;
+  border-top: 1px solid var(--in-content-box-border-color);
+  border-bottom: 1px solid var(--in-content-box-border-color);
+  background-color: var(--in-content-page-background);
+}
+
+xul|*.tabs-left,
+xul|*.tabs-right {
+  border-bottom: none;
+}
+
+xul|tab {
+  -moz-appearance: none;
+  margin-top: 0;
+  padding: 4px 20px;
+  min-height: 44px;
+  color: var(--in-content-tab-color);
+  background-color: var(--in-content-page-background);
+  border-width: 0;
+  /* !important overrides tabbox.css RTL and visuallyselected rules */
+  border-radius: 0 !important;
+  transition: background-color 50ms ease 0s;
+}
+
+xul|tab:hover {
+  background-color: var(--in-content-box-background-hover);
+}
+
+xul|tab[selected] {
+  background-color: var(--in-content-box-background-hover);
+  padding-bottom: 0; /* compensate the 4px border */
+  border-bottom: 4px solid var(--in-content-border-highlight);
+}
+
+xul|*.tab-text {
+  font-size: 1.3rem;
+  line-height: 22px;
+}
+
+/* html buttons */
+
+html|button {
+  padding: 3px;
+  /* override forms.css */
+  font: inherit;
+}
+
+/* xul buttons and menulists */
+
+*|button,
+html|select,
+xul|colorpicker[type="button"],
+xul|menulist {
+  -moz-appearance: none;
+  min-height: 30px;
+  color: var(--in-content-text-color);
+  border: 1px solid var(--in-content-box-border-color);
+  -moz-border-top-colors: none !important;
+  -moz-border-right-colors: none !important;
+  -moz-border-bottom-colors: none !important;
+  -moz-border-left-colors: none !important;
+  border-radius: 2px;
+  background-color: var(--in-content-page-background);
+}
+
+html|button:enabled:hover,
+html|select:enabled:hover,
+xul|button:not([disabled="true"]):hover,
+xul|colorpicker[type="button"]:not([disabled="true"]):hover,
+xul|menulist:not([disabled="true"]):hover {
+  background-color: var(--in-content-box-background-hover);
+}
+
+html|button:enabled:hover:active,
+html|select:enabled:hover:active,
+xul|button:not([disabled="true"]):hover:active,
+xul|colorpicker[type="button"]:not([disabled="true"]):hover:active,
+xul|menulist[open="true"]:not([disabled="true"]) {
+  background-color: var(--in-content-box-background-active);
+}
+
+html|button:disabled,
+html|select:disabled,
+xul|button[disabled="true"],
+xul|colorpicker[type="button"][disabled="true"],
+xul|menulist[disabled="true"] {
+  opacity: 0.5;
+}
+
+*|button.primary {
+  background-color: var(--in-content-primary-button-background);
+  border-color: transparent;
+  color: var(--in-content-selected-text);
+}
+
+html|button.primary:enabled:hover,
+xul|button.primary:not([disabled="true"]):hover {
+  background-color: var(--in-content-primary-button-background-hover);
+}
+
+html|button.primary:enabled:hover:active,
+xul|button.primary:not([disabled="true"]):hover:active {
+  background-color: var(--in-content-primary-button-background-active);
+}
+
+xul|colorpicker[type="button"] {
+  padding: 6px;
+  width: 50px;
+}
+
+xul|button > xul|*.button-box,
+xul|menulist > xul|*.menulist-label-box {
+  padding-right: 10px !important;
+  padding-left: 10px !important;
+}
+
+xul|menulist > xul|*.menulist-label-box > xul|*.menulist-icon[src] {
+  margin-inline-end: 5px;
+}
+
+xul|button[type="menu"] > xul|*.button-box > xul|*.button-menu-dropmarker {
+  -moz-appearance: none;
+  margin: 1px 0;
+  margin-inline-start: 10px;
+  padding: 0;
+  width: 10px;
+  height: 16px;
+  border: none;
+  background-color: transparent;
+  list-style-image: url("chrome://global/skin/in-content/dropdown.svg#dropdown");
+}
+
+xul|*.help-button {
+  min-width: 16px;
+  margin-inline-end: 0;
+  border-width: 0;
+  background-image: none;
+  box-shadow: none;
+  list-style-image: url("chrome://global/skin/in-content/help-glyph.svg#help");
+}
+
+xul|*.help-button:not([disabled="true"]):hover {
+  background-image: none;
+  /* Override default button background */
+  background-color: transparent;
+  list-style-image: url("chrome://global/skin/in-content/help-glyph.svg#help-hover");
+}
+
+xul|*.help-button:not([disabled="true"]):hover:active {
+  background-image: none;
+  /* Override default button background */
+  background-color: transparent;
+  list-style-image: url("chrome://global/skin/in-content/help-glyph.svg#help-pressed");
+}
+
+xul|*.close-icon > xul|*.button-box,
+xul|*.help-button > xul|*.button-box {
+  padding-top: 0;
+  padding-bottom: 0;
+  padding-right: 0 !important;
+  padding-left: 0 !important;
+}
+
+xul|*.help-button > xul|*.button-box > xul|*.button-icon {
+  width: 16px;
+  height: 16px;
+}
+
+xul|*.help-button > xul|*.button-box > xul|*.button-text {
+  display: none;
+}
+
+html|*.help-button {
+  width: 16px;
+  height: 16px;
+  border: 0;
+  padding: 0;
+  display: inline-block;
+  background-image: url("chrome://global/skin/in-content/help-glyph.svg#help");
+  background-repeat: no-repeat;
+  background-position: center center;
+  background-size: contain;
+}
+
+html|*.help-button:hover {
+  background-image: url("chrome://global/skin/in-content/help-glyph.svg#help-hover");
+}
+
+html|*.help-button:hover:active {
+  background-image: url("chrome://global/skin/in-content/help-glyph.svg#help-pressed");
+}
+
+xul|*.spinbuttons-button {
+  min-height: initial;
+  margin-inline-start: 10px !important;
+  margin-inline-end: 2px !important;
+}
+
+xul|*.spinbuttons-up {
+  margin-top: 2px !important;
+  border-radius: 1px 1px 0 0;
+}
+
+xul|*.spinbuttons-down  {
+  margin-bottom: 2px !important;
+  border-radius: 0 0 1px 1px;
+}
+
+xul|*.spinbuttons-button > xul|*.button-box {
+  padding: 1px 5px 2px !important;
+}
+
+xul|*.spinbuttons-up > xul|*.button-box > xul|*.button-icon {
+  list-style-image: url("chrome://global/skin/arrow/arrow-up.gif");
+}
+
+xul|*.spinbuttons-up[disabled="true"] > xul|*.button-box > xul|*.button-icon {
+  list-style-image: url("chrome://global/skin/arrow/arrow-up-dis.gif");
+}
+
+xul|*.spinbuttons-down > xul|*.button-box > xul|*.button-icon {
+  list-style-image: url("chrome://global/skin/arrow/arrow-dn.gif");
+}
+
+xul|*.spinbuttons-down[disabled="true"] > xul|*.button-box > xul|*.button-icon {
+  list-style-image: url("chrome://global/skin/arrow/arrow-dn-dis.gif");
+}
+
+xul|menulist:not([editable="true"]) > xul|*.menulist-dropmarker {
+  -moz-appearance: none;
+  margin-inline-end: 4px;
+  padding: 0;
+  border: none;
+  background-color: transparent;
+  list-style-image: url("chrome://global/skin/in-content/dropdown.svg#dropdown");
+}
+
+xul|menulist:not([editable="true"]) > xul|*.menulist-dropmarker > xul|*.dropmarker-icon {
+  width: 18px;
+  height: 18px;
+}
+
+xul|menulist[disabled="true"]:not([editable="true"]) > xul|*.menulist-dropmarker {
+  list-style-image: url("chrome://global/skin/in-content/dropdown.svg#dropdown-disabled")
+}
+
+xul|menulist > xul|menupopup,
+xul|button[type="menu"] > xul|menupopup {
+  -moz-appearance: none;
+  border: 1px solid var(--in-content-box-border-color);
+  border-radius: 2px;
+  background-color: var(--in-content-box-background);
+}
+
+xul|menulist > xul|menupopup xul|menu,
+xul|menulist > xul|menupopup xul|menuitem,
+xul|button[type="menu"] > xul|menupopup xul|menu,
+xul|button[type="menu"] > xul|menupopup xul|menuitem {
+  -moz-appearance: none;
+  font-size: 1em;
+  color: var(--in-content-text-color);
+  padding-top: 0.2em;
+  padding-bottom: 0.2em;
+  padding-inline-start: 10px;
+  padding-inline-end: 30px;
+}
+
+xul|menulist > xul|menupopup > xul|menu:not([disabled="true"])[_moz-menuactive="true"],
+xul|menulist > xul|menupopup > xul|menuitem:not([disabled="true"])[_moz-menuactive="true"],
+xul|button[type="menu"] > xul|menupopup > xul|menu:not([disabled="true"])[_moz-menuactive="true"],
+xul|button[type="menu"] > xul|menupopup > xul|menuitem:not([disabled="true"])[_moz-menuactive="true"] {
+  color: var(--in-content-text-color);
+  background-color: var(--in-content-item-hover);
+}
+
+xul|menulist > xul|menupopup > xul|menu:not([disabled="true"])[selected="true"],
+xul|menulist > xul|menupopup > xul|menuitem:not([disabled="true"])[selected="true"],
+xul|button[type="menu"] > xul|menupopup > xul|menu:not([disabled="true"])[selected="true"],
+xul|button[type="menu"] > xul|menupopup > xul|menuitem:not([disabled="true"])[selected="true"] {
+  color: var(--in-content-selected-text);
+  background-color: var(--in-content-item-selected);
+}
+
+xul|menulist > xul|menupopup > xul|menu[disabled="true"],
+xul|menulist > xul|menupopup > xul|menuitem[disabled="true"],
+xul|button[type="menu"] > xul|menupopup > xul|menu[disabled="true"],
+xul|button[type="menu"] > xul|menupopup > xul|menuitem[disabled="true"] {
+  color: #999;
+  /* override the [_moz-menuactive="true"] background color from
+     global/menu.css */
+  background-color: transparent;
+}
+
+xul|menulist > xul|menupopup xul|menuseparator,
+xul|button[type="menu"] > xul|menupopup xul|menuseparator {
+  -moz-appearance: none;
+  margin: 0;
+  padding: 0;
+  border-top: 1px solid var(--in-content-box-border-color);
+  border-bottom: none;
+}
+
+/* textboxes */
+
+html|input[type="text"],
+html|textarea,
+xul|textbox {
+  -moz-appearance: none;
+  color: var(--in-content-text-color);
+  border: 1px solid var(--in-content-box-border-color);
+  -moz-border-top-colors: none !important;
+  -moz-border-right-colors: none !important;
+  -moz-border-bottom-colors: none !important;
+  -moz-border-left-colors: none !important;
+  border-radius: 2px;
+  background-color: var(--in-content-box-background);
+}
+
+xul|textbox {
+  min-height: 30px;
+  padding-right: 10px;
+  padding-left: 10px;
+}
+
+/* Create a separate rule to unset these styles on .tree-input instead of
+   using :not(.tree-input) so the selector specifity doesn't change. */
+xul|textbox.tree-input {
+  min-height: unset;
+  padding-right: unset;
+  padding-left: unset;
+}
+
+html|input[type="text"],
+html|textarea {
+  font-family: inherit;
+  font-size: inherit;
+  padding: 5px 10px;
+}
+
+html|input[type="text"]:focus,
+html|textarea:focus,
+xul|textbox[focused] {
+  border-color: var(--in-content-border-focus);
+}
+
+html|input[type="text"]:disabled,
+html|textarea:disabled,
+xul|textbox[disabled="true"] {
+  opacity: 0.5;
+}
+
+/* Links */
+
+html|a,
+.text-link {
+  color: var(--in-content-link-color);
+  text-decoration: none;
+}
+
+html|a:hover,
+.text-link:hover {
+  color: var(--in-content-link-color-hover);
+  text-decoration: underline;
+}
+
+html|a:visited {
+  color: var(--in-content-link-color-visited);
+}
+
+html|a:hover:active,
+.text-link:hover:active {
+  color: var(--in-content-link-color-active);
+  text-decoration: none;
+}
+
+/* Checkboxes and radio buttons */
+
+/* Hide the actual checkbox */
+html|input[type="checkbox"] {
+  opacity: 0;
+  width: 0;
+  pointer-events: none;
+  position: absolute;
+}
+
+/* Create a box to style as the checkbox */
+html|input[type="checkbox"] + html|label:before {
+  display: inline-block;
+  content: "";
+  vertical-align: middle;
+}
+
+html|input[type="checkbox"] + html|label {
+  line-height: 0px;
+}
+
+xul|checkbox {
+  margin-inline-start: 0;
+}
+
+xul|*.checkbox-check,
+html|input[type="checkbox"] + html|label:before {
+  -moz-appearance: none;
+  width: 23px;
+  height: 23px;
+  border-radius: 2px;
+  border: 1px solid var(--in-content-box-border-color);
+  margin-inline-end: 10px;
+  background-color: #f1f1f1;
+  /* !important needed to override toolkit checked !important rule */
+  background-image: linear-gradient(#fff, rgba(255,255,255,0.8)) !important;
+  background-position: center center;
+  background-repeat: no-repeat;
+  box-shadow: 0 1px 1px 0 #fff, inset 0 2px 0 0 rgba(0,0,0,0.03);
+}
+
+xul|checkbox:not([disabled="true"]):hover > xul|*.checkbox-check,
+html|input[type="checkbox"]:not(:disabled) + html|label:hover:before {
+  border-color: var(--in-content-border-focus);
+}
+
+xul|*.checkbox-check[checked] {
+  list-style-image: url("chrome://global/skin/in-content/check.svg#check");
+}
+
+html|input[type="checkbox"]:checked + html|label:before {
+  background-image: url("chrome://global/skin/in-content/check.svg#check"), linear-gradient(#fff, rgba(255,255,255,0.8)) !important;
+}
+
+xul|checkbox[disabled="true"] > xul|*.checkbox-check,
+html|input[type="checkbox"]:disabled + html|label {
+  opacity: 0.5;
+}
+
+xul|*.checkbox-label-box {
+  margin-inline-start: -1px; /* negative margin for the transparent border */
+  padding-inline-start: 0;
+}
+
+xul|richlistitem > xul|*.checkbox-check {
+  margin: 3px 6px;
+}
+
+html|*.toggle-container-with-text {
+  display: flex;
+  align-items: center;
+}
+
+xul|radio {
+  margin-inline-start: 0;
+}
+
+xul|*.radio-check {
+  -moz-appearance: none;
+  width: 23px;
+  height: 23px;
+  border: 1px solid var(--in-content-box-border-color);
+  border-radius: 50%;
+  margin-inline-end: 10px;
+  background-color: #f1f1f1;
+  background-image: linear-gradient(#fff, rgba(255,255,255,0.80));
+  box-shadow: 0 1px 1px 0 #fff, inset 0 2px 0 0 rgba(0,0,0,0.03);
+}
+
+xul|radio:not([disabled="true"]):hover > xul|*.radio-check {
+  border-color: var(--in-content-border-focus);
+}
+
+xul|*.radio-check[selected] {
+  list-style-image: url("chrome://global/skin/in-content/radio.svg#radio");
+}
+
+xul|radio[disabled="true"] > xul|*.radio-check {
+  opacity: 0.5;
+}
+
+xul|*.radio-label-box {
+  margin-inline-start: -1px; /* negative margin for the transparent border */
+  margin-inline-end: 10px;
+  padding-inline-start: 0;
+}
+
+/* Category List */
+
+*|*#categories {
+  -moz-appearance: none;
+  background-color: var(--in-content-category-background);
+  padding-top: 39px;
+  margin: 0;
+  border-width: 0;
+}
+
+*|*.category {
+  -moz-appearance: none;
+  color: var(--in-content-category-text);
+  border-inline-end-width: 0;
+  padding-inline-start: 15px;
+  padding-inline-end: 21px;
+  min-height: 40px;
+  transition: background-color 150ms;
+}
+
+*|*.category:hover {
+  background-color: var(--in-content-category-background-hover);
+}
+
+*|*.category[selected],
+*|*.category.selected {
+  background-color: var(--in-content-category-background-active);
+  color: var(--in-content-category-text-selected);
+  padding-inline-start: 11px; /* compensate the 4px border */
+  border-inline-start: solid 4px var(--in-content-border-highlight);
+}
+
+*|*#categories[keyboard-navigation="true"]:-moz-focusring > *|*.category[current] {
+  border-top: var(--in-content-category-border-focus);
+  border-bottom: var(--in-content-category-border-focus);
+}
+
+*|*.category-name {
+  line-height: 22px;
+  font-size: 1.25rem;
+  padding-bottom: 2px;
+  padding-inline-start: 9px;
+  margin: 0;
+  -moz-user-select: none;
+}
+
+*|*.category-icon {
+  width: 24px;
+  height: 24px;
+}
+
+/* header */
+
+*|*.header {
+  border-bottom: 1px solid var(--in-content-header-border-color);
+  margin-inline-end: 4px; /* add the 4px end-margin of other elements */
+  margin-bottom: 15px;
+  padding-bottom: 15px;
+  -moz-box-align: baseline;
+}
+
+*|*.header-name {
+  font-size: 2.5rem;
+  font-weight: normal;
+  line-height: 40px;
+  margin: 0;
+  -moz-user-select: none;
+}
+
+/* File fields */
+
+xul|filefield {
+  -moz-appearance: none;
+  background-color: transparent;
+  border: none;
+  padding: 0;
+}
+
+xul|*.fileFieldContentBox {
+  background-color: transparent;
+}
+
+xul|*.fileFieldIcon {
+  margin-inline-start: 10px;
+  margin-inline-end: 0;
+}
+
+xul|*.fileFieldLabel {
+  margin-inline-start: -26px;
+  padding-inline-start: 36px;
+}
+
+xul|textbox:-moz-locale-dir(rtl),
+xul|*.fileFieldLabel:-moz-locale-dir(rtl),
+xul|textbox + xul|button:-moz-locale-dir(ltr),
+xul|filefield + xul|button:-moz-locale-dir(ltr) {
+  border-top-left-radius: 0;
+  border-bottom-left-radius: 0;
+}
+
+xul|textbox:-moz-locale-dir(ltr),
+xul|*.fileFieldLabel:-moz-locale-dir(ltr),
+xul|textbox + xul|button:-moz-locale-dir(rtl),
+xul|filefield + xul|button:-moz-locale-dir(rtl) {
+  border-top-right-radius: 0;
+  border-bottom-right-radius: 0;
+}
+
+xul|textbox + xul|button,
+xul|filefield + xul|button {
+  border-inline-start: none;
+}
+
+/* List boxes */
+
+xul|richlistbox,
+xul|listbox {
+  -moz-appearance: none;
+  margin-inline-start: 0;
+  background-color: var(--in-content-box-background);
+  border: 1px solid var(--in-content-box-border-color);
+  color: var(--in-content-text-color);
+}
+
+xul|treechildren::-moz-tree-row,
+xul|listbox xul|listitem {
+  padding: 0.3em;
+  margin: 0;
+  border: none;
+  border-radius: 0;
+  background-image: none;
+}
+
+xul|treechildren::-moz-tree-row(hover),
+xul|listbox xul|listitem:hover {
+  background-color: var(--in-content-item-hover);
+}
+
+xul|treechildren::-moz-tree-row(selected),
+xul|listbox xul|listitem[selected="true"] {
+  background-color: var(--in-content-item-selected);
+  color: var(--in-content-selected-text);
+}
+
+/* Trees */
+
+xul|tree {
+  -moz-appearance: none;
+  font-size: 1em;
+  border: 1px solid var(--in-content-box-border-color);
+  background-color: var(--in-content-box-background);
+  margin: 0;
+}
+
+xul|tree:-moz-focusring,
+xul|richlistbox:-moz-focusring {
+  border: 1px dotted var(--in-content-border-focus);
+}
+
+xul|listheader,
+xul|treecols {
+  -moz-appearance: none;
+  border: none;
+  border-bottom: 1px solid var(--in-content-border-color);
+  padding: 0;
+}
+
+.autocomplete-tree > xul|treecols {
+  border-bottom: none !important;
+}
+
+xul|treecol:not([hideheader="true"]),
+xul|treecolpicker {
+  -moz-appearance: none;
+  border: none;
+  background-color: var(--in-content-box-background-hover);
+  color: #808080;
+  padding: 5px 10px;
+}
+
+xul|treecol:not([hideheader="true"]):not([sortable="false"]):hover,
+xul|treecolpicker:hover {
+  background-color: var(--in-content-box-background-active);
+  color: var(--in-content-text-color);
+}
+
+xul|treecol:not([hideheader="true"]):not(:first-child),
+xul|treecolpicker {
+  border-inline-start-width: 1px;
+  border-inline-start-style: solid;
+  border-image: linear-gradient(transparent 0%, transparent 20%, #c1c1c1 20%, #c1c1c1 80%, transparent 80%, transparent 100%) 1 1;
+}
+
+xul|treecol:not([hideheader="true"]) > xul|*.treecol-sortdirection[sortDirection] {
+  list-style-image: url("chrome://global/skin/in-content/dropdown.svg#dropdown");
+  width: 18px;
+  height: 18px;
+}
+
+xul|treecol:not([hideheader="true"]) > xul|*.treecol-sortdirection[sortDirection="ascending"] {
+  transform: scaleY(-1);
+}
+
+/* This is the only way to increase the height of a tree row unfortunately */
+xul|treechildren::-moz-tree-row {
+  min-height: 2em;
+}
+
+/* Color needs to be set on tree cell in order to be applied */
+xul|treechildren::-moz-tree-cell-text {
+  color: var(--in-content-text-color);
+}
+
+xul|treechildren::-moz-tree-cell-text(selected) {
+  color: var(--in-content-selected-text);
+}
diff --git a/toolkit/themes/shared/in-content/dropdown.svg b/toolkit/themes/shared/in-content/dropdown.svg
new file mode 100644
index 000000000..bc7bad2c5
--- /dev/null
+++ b/toolkit/themes/shared/in-content/dropdown.svg
@@ -0,0 +1,22 @@
+<?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>

+    use:not(:target) {

+      display: none;

+    }

+    use {

+      fill: -moz-DialogText;

+    }

+    use[id$="-disabled"] {

+      fill: GrayText;

+    }

+  </style>

+  <defs>

+    <path id="dropdown-shape" d="M12,6l-4.016,4L4,6H12z"/>

+  </defs>

+  <use id="dropdown" xlink:href="#dropdown-shape"/>

+  <use id="dropdown-disabled" xlink:href="#dropdown-shape"/>

+</svg>

diff --git a/toolkit/themes/shared/in-content/help-glyph.svg b/toolkit/themes/shared/in-content/help-glyph.svg
new file mode 100644
index 000000000..5dc3af4e1
--- /dev/null
+++ b/toolkit/themes/shared/in-content/help-glyph.svg
@@ -0,0 +1,28 @@
+<!-- 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>

+    use:not(:target) { display: none; }

+

+    path { fill: #999; }

+    circle { fill: none; stroke: #999; stroke-width: 2; }

+

+    #help-hover path { fill: #fff; }

+    #help-hover circle { fill: #808080; stroke: #808080; }

+

+    #help-pressed path { fill: #fff; }

+    #help-pressed circle { fill: #666; stroke: #666; }

+  </style>

+

+  <defs>

+    <g id="help-shape">

+      <circle cx="12" cy="12" r="11" />

+      <path d="M12.2,4.9c-1.6,0-2.9,0.4-3.8,0.8L9.2,8c0.6-0.4,1.5-0.6,2.2-0.6c1.1,0,1.6,0.5,1.6,1.2 c0,0.7-0.6,1.3-1.3,2.1c-1,1.1-1.4,2.1-1.3,3.2l0,0.5h3V14c0-0.9,0.3-1.7,1.2-2.5c0.9-0.9,1.9-1.9,1.9-3.4 C16.6,6.4,15.2,4.9,12.2,4.9z M12,16.1c-1.1,0-1.9,0.8-1.9,1.9c0,1.1,0.8,1.9,1.9,1.9c1.2,0,1.9-0.8,1.9-1.9 C13.9,16.9,13.1,16.1,12,16.1z"/>

+    </g>

+  </defs>

+

+  <use id="help"          xlink:href="#help-shape" />

+  <use id="help-hover"    xlink:href="#help-shape" />

+  <use id="help-pressed"  xlink:href="#help-shape" />

+</svg>

diff --git a/toolkit/themes/shared/in-content/info-pages.inc.css b/toolkit/themes/shared/in-content/info-pages.inc.css
new file mode 100644
index 000000000..4889602a0
--- /dev/null
+++ b/toolkit/themes/shared/in-content/info-pages.inc.css
@@ -0,0 +1,109 @@
+% 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");
+/* Body and container */
+body {
+  display: flex;
+  flex-direction: column;
+  box-sizing: border-box;
+  min-height: 100vh;
+  padding-top: 0;
+  padding-bottom: 0;
+  padding-inline-start: calc(48px + 4.6em);
+  padding-inline-end: 48px;
+  align-items: center;
+  justify-content: center;
+}
+
+.container {
+  min-width: 13em;
+  max-width: 52em;
+}
+
+.container.restore-chosen {
+  display: flex;
+  flex-direction: column;
+  flex-grow: 1;
+  margin: 10vh 0;
+}
+
+/* Typography */
+.title {
+  background-image: url("chrome://global/skin/icons/info.svg");
+  background-position: left 0;
+  background-repeat: no-repeat;
+  background-size: 1.6em;
+  margin-inline-start: -2.3em;
+  padding-inline-start: 2.3em;
+  font-size: 2.5em;
+}
+
+.title:dir(rtl) {
+  background-position: right 0;
+}
+
+.title-text {
+  border-bottom: 1px solid #C1C1C1;
+  font-size: inherit;
+  padding-bottom: 0.4em;
+}
+
+@media (max-width: 675px) {
+  body {
+    padding: 0 48px;
+  }
+
+  .title {
+    background-image: none !important;
+    padding-inline-start: 0;
+    margin-inline-start: 0;
+  }
+
+  .title-text {
+    padding-top: 0;
+  }
+}
+
+ul, ol {
+  margin: 0;
+  padding: 0;
+  margin-inline-start: 1em;
+}
+
+ul > li, ol > li {
+  margin-bottom: .5em;
+}
+
+ul {
+  list-style: disc;
+}
+
+/* Buttons */
+.button-container {
+  margin-top: 1.2em;
+}
+
+.button-container > button {
+  min-width: 150px;
+}
+
+.button-container > button:first-child {
+  margin-inline-start: 0;
+}
+
+/* Trees */
+.tree-container {
+  margin-top: 1.2em;
+  flex-grow: 1;
+  min-height: 12em;
+}
+
+.tree-container > tree {
+  height: 100%;
+}
+
+tree {
+  width: 100%;
+}
diff --git a/toolkit/themes/shared/in-content/radio.svg b/toolkit/themes/shared/in-content/radio.svg
new file mode 100644
index 000000000..97826bc20
--- /dev/null
+++ b/toolkit/themes/shared/in-content/radio.svg
@@ -0,0 +1,22 @@
+<?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 21 21">
+  <style>
+    use:not(:target) {
+      display: none;
+    }
+    use {
+      fill: #2292d0;
+    }
+    use[id$="-native"] {
+      fill: -moz-dialogText;
+    }
+  </style>
+  <defs>
+    <circle id="radio-shape" cx="10.5" cy="10.5" r="6"/>
+  </defs>
+  <use id="radio" xlink:href="#radio-shape"/>
+  <use id="radio-native" xlink:href="#radio-shape"/>
+</svg>