6 files changed, 803 insertions, 0 deletions
diff --git a/browser/themes/shared/incontentprefs/containers.css b/browser/themes/shared/incontentprefs/containers.css
new file mode 100644
index 000000000..5446dccce
--- /dev/null
+++ b/browser/themes/shared/incontentprefs/containers.css
@@ -0,0 +1,32 @@
+/* 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
new file mode 100644
index 000000000..27de416ab
--- /dev/null
+++ b/browser/themes/shared/incontentprefs/dialog.inc.css
@@ -0,0 +1,68 @@
+%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
+
+dialog,
+window,
+prefpane,
+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;
+}
+
+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;
+}
diff --git a/browser/themes/shared/incontentprefs/favicon.ico b/browser/themes/shared/incontentprefs/favicon.ico
new file mode 100644
index 000000000..4d07d2b5d
--- /dev/null
+++ b/browser/themes/shared/incontentprefs/favicon.ico
diff --git a/browser/themes/shared/incontentprefs/icons.svg b/browser/themes/shared/incontentprefs/icons.svg
new file mode 100644
index 000000000..2d0b67155
--- /dev/null
+++ b/browser/themes/shared/incontentprefs/icons.svg
@@ -0,0 +1,63 @@
+<?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 24 24">
+  <style>
+    use:not(:target) {
+      display: none;
+    }
+    use {
+      fill: #fbfbfb;
+      stroke: rgba(0,0,0,0.4);
+      stroke-width: .5px;
+    }
+    use[id$="-native"] {
+      fill: ThreeDHighlight;
+    }
+  </style>
+  <defs>
+    <g id="general-shape">
+      <path d="M18.97,3H5.03C3.914,3,3,3.914,3,5.03v13.94C3,20.086,3.914,21,5.03,21H18.97c1.117,0,2.03-0.914,2.03-2.03 V5.03C21,3.914,20.086,3,18.97,3z M5.35,19.326c-0.404,0-0.731-0.327-0.731-0.731c0-0.404,0.327-0.731,0.731-0.731 c0.404,0,0.731,0.327,0.731,0.731C6.081,19,5.754,19.326,5.35,19.326z M5.35,6.168c-0.403,0-0.731-0.328-0.731-0.731 c0-0.404,0.328-0.731,0.731-0.731c0.403,0,0.731,0.327,0.731,0.731C6.081,5.84,5.753,6.168,5.35,6.168z M15.243,14.035 c0,0.229-0.186,0.416-0.414,0.416c-0.229,0-0.415,0.186-0.415,0.414v3.347c0,0.228-0.185,0.384-0.414,0.384l-4.141,0.03 c-0.227,0-0.414-0.186-0.414-0.414v-3.347c0-0.228-0.185-0.414-0.414-0.414c-0.227,0-0.414-0.187-0.414-0.416V6.582 c0-0.229,0.187-0.414,0.414-0.414h5.798c0.228,0,0.414,0.185,0.414,0.414V14.035z M18.509,19.326c-0.404,0-0.731-0.327-0.731-0.731 c0-0.404,0.327-0.731,0.731-0.731c0.404,0,0.731,0.327,0.731,0.731C19.24,19,18.913,19.326,18.509,19.326z M18.509,6.168 c-0.404,0-0.731-0.328-0.731-0.731c0-0.404,0.327-0.731,0.731-0.731c0.404,0,0.731,0.327,0.731,0.731 C19.24,5.84,18.913,6.168,18.509,6.168z"/>
+      <path d="M12.757,7.824h-1.657c-0.456,0-0.828,0.373-0.828,0.828v8.282c0,0.456,0.373,0.828,0.828,0.828h1.657 c0.456,0,0.828-0.373,0.828-0.828V8.652C13.586,8.196,13.213,7.824,12.757,7.824z"/>
+    </g>
+    <g id="search-shape">
+      <path d="M2,10.018c0,4.43,3.585,8.019,8.009,8.019 c1.603,0,3.095-0.473,4.348-1.285l4.806,4.81c0.58,0.583,1.523,0.583,2.105,0l0.296-0.297c0.582-0.583,0.582-1.527,0-2.11 l-4.808-4.814c0.8-1.247,1.265-2.73,1.265-4.323c0-4.43-3.587-8.018-8.012-8.018C5.585,2,2,5.589,2,10.018z M5.104,10.021 c0-2.716,2.196-4.915,4.906-4.915c2.71,0,4.908,2.199,4.908,4.915c0,2.712-2.198,4.911-4.908,4.911 C7.3,14.931,5.104,12.732,5.104,10.021z"/>
+    </g>
+    <g id="content-shape">
+      <path d="M16.286,2H5.571C4.388,2,3.429,2.96,3.429,4.143v15.714 C3.429,21.04,4.388,22,5.571,22h12.857c1.185,0,2.143-0.96,2.143-2.143V6.286L16.286,2z M18.945,19.223c0,0.22-0.18,0.4-0.4,0.4 h-13.2c-0.22,0-0.4-0.18-0.4-0.4v-0.846c0-0.22,0.18-0.4,0.4-0.4h13.2c0.22,0,0.4,0.18,0.4,0.4V19.223z M18.945,15.223 c0,0.22-0.18,0.4-0.4,0.4h-13.2c-0.22,0-0.4-0.18-0.4-0.4v-0.846c0-0.22,0.18-0.4,0.4-0.4h13.2c0.22,0,0.4,0.18,0.4,0.4V15.223z M18.945,11.229c0,0.22-0.18,0.4-0.4,0.4h-13.2c-0.22,0-0.4-0.18-0.4-0.4v-0.846c0-0.22,0.18-0.4,0.4-0.4h13.2 c0.22,0,0.4,0.18,0.4,0.4V11.229z M14.833,7.707v-4.65l4.65,4.65H14.833z"/>
+    </g>
+    <g id="applications-shape">
+      <path d="M16.673,8.914C16.089,4.122,13.248,1,12,1c-1.25,0-3.986,3.122-4.767,7.914l-3.122,3.131v7.889h2.268 l2.978-3.436c0.28,0.29,0.737,1.666,1.065,1.858h3.155c0.331-0.193,0.789-1.569,1.068-1.858l3.123,3.436h2.12v-7.84L16.673,8.914z M12.042,8.735c-0.604,0-1.279,0.06-1.818,0.165c0.478-1.453,1.345-3.117,1.781-3.117c0.435,0,1.301,1.655,1.775,3.1 C13.265,8.789,12.615,8.735,12.042,8.735z M12.524,19.145c0.076,0.196,0.119,0.602,0.119,0.86c0,0.66-0.524,1.074-0.687,1.074 c-0.163,0-0.615-0.414-0.615-1.074c0-0.257,0.045-0.664,0.119-0.86h-0.754c-0.089,0.345-0.39,1.005-0.39,1.408 c0,1.458,1.328,2.447,1.686,2.447c0.359,0,1.686-0.951,1.686-2.407c0-0.404-0.301-1.103-0.388-1.449H12.524z"/>
+    </g>
+    <g id="privacy-shape">
+      <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
new file mode 100644
index 000000000..577baa6ed
--- /dev/null
+++ b/browser/themes/shared/incontentprefs/preferences.inc.css
@@ -0,0 +1,591 @@
+%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;
+}
+
+/* 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
new file mode 100644
index 000000000..f3c206b41
--- /dev/null
+++ b/browser/themes/shared/incontentprefs/search.css
@@ -0,0 +1,49 @@
+/* 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;
+}