Adding upstream version 124.0.1.upstream/124.0.1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

46 files changed, 7728 insertions, 0 deletions

diff --git a/browser/components/preferences/dialogs/addEngine.css b/browser/components/preferences/dialogs/addEngine.css
new file mode 100644
index 0000000000..450e07f65f
--- /dev/null
+++ b/browser/components/preferences/dialogs/addEngine.css
@@ -0,0 +1,24 @@
+/* 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/. */
+
+input {
+  flex: 1;
+}
+
+hbox {
+  width: 100%;
+}
+
+#engineNameLabel,
+#engineUrlLabel,
+#engineAliasLabel {
+  /* Align the labels with the inputs */
+  margin-inline-start: 4px;
+}
+
+#engineUrl {
+  /* Full URLs should always be displayed as LTR */
+  direction: ltr;
+  text-align: match-parent;
+}
diff --git a/browser/components/preferences/dialogs/addEngine.js b/browser/components/preferences/dialogs/addEngine.js
new file mode 100644
index 0000000000..1faf8622b3
--- /dev/null
+++ b/browser/components/preferences/dialogs/addEngine.js
@@ -0,0 +1,69 @@
+/* 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-globals-from ../main.js */
+
+let gAddEngineDialog = {
+  _form: null,
+  _name: null,
+  _alias: null,
+
+  onLoad() {
+    document.mozSubdialogReady = this.init();
+  },
+
+  async init() {
+    this._dialog = document.querySelector("dialog");
+    this._form = document.getElementById("addEngineForm");
+    this._name = document.getElementById("engineName");
+    this._alias = document.getElementById("engineAlias");
+
+    this._name.addEventListener("input", this.onNameInput.bind(this));
+    this._alias.addEventListener("input", this.onAliasInput.bind(this));
+    this._form.addEventListener("input", this.onFormInput.bind(this));
+
+    document.addEventListener("dialogaccept", this.onAddEngine.bind(this));
+  },
+
+  async onAddEngine(event) {
+    let url = document
+      .getElementById("engineUrl")
+      .value.replace(/%s/, "{searchTerms}");
+    await Services.search.wrappedJSObject.addUserEngine(
+      this._name.value,
+      url,
+      this._alias.value
+    );
+  },
+
+  async onNameInput() {
+    if (this._name.value) {
+      let engine = Services.search.getEngineByName(this._name.value);
+      let validity = engine
+        ? document.getElementById("engineNameExists").textContent
+        : "";
+      this._name.setCustomValidity(validity);
+    }
+  },
+
+  async onAliasInput() {
+    let validity = "";
+    if (this._alias.value) {
+      let engine = await Services.search.getEngineByAlias(this._alias.value);
+      if (engine) {
+        engine = document.getElementById("engineAliasExists").textContent;
+      }
+    }
+    this._alias.setCustomValidity(validity);
+  },
+
+  async onFormInput() {
+    this._dialog.setAttribute(
+      "buttondisabledaccept",
+      !this._form.checkValidity()
+    );
+  },
+};
+
+window.addEventListener("load", () => gAddEngineDialog.onLoad());
diff --git a/browser/components/preferences/dialogs/addEngine.xhtml b/browser/components/preferences/dialogs/addEngine.xhtml
new file mode 100644
index 0000000000..d664fd8541
--- /dev/null
+++ b/browser/components/preferences/dialogs/addEngine.xhtml
@@ -0,0 +1,78 @@
+<?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/. -->
+
+<window
+  xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"
+  xmlns:html="http://www.w3.org/1999/xhtml"
+  data-l10n-id="add-engine-window2"
+  data-l10n-attrs="title, style"
+  persist="width height"
+>
+  <dialog
+    buttons="accept,cancel"
+    buttondisabledaccept="true"
+    data-l10n-id="add-engine-dialog"
+    data-l10n-attrs="buttonlabelaccept, buttonaccesskeyaccept"
+  >
+    <linkset>
+      <html:link rel="stylesheet" href="chrome://global/skin/global.css" />
+      <html:link
+        rel="stylesheet"
+        href="chrome://browser/content/preferences/dialogs/addEngine.css"
+      />
+      <html:link
+        rel="stylesheet"
+        href="chrome://browser/skin/preferences/preferences.css"
+      />
+
+      <html:link rel="localization" href="browser/preferences/addEngine.ftl" />
+    </linkset>
+
+    <script src="chrome://browser/content/preferences/dialogs/addEngine.js" />
+    <script src="chrome://global/content/globalOverlay.js" />
+    <script src="chrome://browser/content/utilityOverlay.js" />
+
+    <separator class="thin" />
+
+    <html:form id="addEngineForm">
+      <html:span
+        id="engineNameExists"
+        hidden="hidden"
+        data-l10n-id="engine-name-exists"
+      />
+      <html:label
+        id="engineNameLabel"
+        for="engineName"
+        data-l10n-id="add-engine-name"
+      />
+      <hbox>
+        <html:input id="engineName" type="text" required="required" />
+      </hbox>
+
+      <html:label
+        id="engineUrlLabel"
+        for="engineUrl"
+        data-l10n-id="add-engine-url"
+      />
+      <hbox>
+        <html:input id="engineUrl" type="url" required="required" />
+      </hbox>
+
+      <html:span
+        id="engineAliasExists"
+        hidden="hidden"
+        data-l10n-id="engine-alias-exists"
+      />
+      <html:label
+        id="engineAliasLabel"
+        for="engineAlias"
+        data-l10n-id="add-engine-alias"
+      />
+      <hbox>
+        <html:input id="engineAlias" type="text" />
+      </hbox>
+    </html:form>
+  </dialog>
+</window>
diff --git a/browser/components/preferences/dialogs/applicationManager.js b/browser/components/preferences/dialogs/applicationManager.js
new file mode 100644
index 0000000000..0c2105cbe4
--- /dev/null
+++ b/browser/components/preferences/dialogs/applicationManager.js
@@ -0,0 +1,129 @@
+// 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-globals-from ../main.js */
+
+var gAppManagerDialog = {
+  _removed: [],
+
+  onLoad() {
+    document.mozSubdialogReady = this.init();
+  },
+
+  async init() {
+    this.handlerInfo = window.arguments[0];
+
+    document.addEventListener("dialogaccept", function () {
+      gAppManagerDialog.onOK();
+    });
+
+    let gMainPane = window.parent.gMainPane;
+
+    const appDescElem = document.getElementById("appDescription");
+    if (this.handlerInfo.wrappedHandlerInfo instanceof Ci.nsIMIMEInfo) {
+      let { typeDescription } = this.handlerInfo;
+      let typeStr;
+      if (typeDescription.id) {
+        MozXULElement.insertFTLIfNeeded("browser/preferences/preferences.ftl");
+        typeStr = await document.l10n.formatValue(
+          typeDescription.id,
+          typeDescription.args
+        );
+      } else {
+        typeStr = typeDescription.raw;
+      }
+      document.l10n.setAttributes(appDescElem, "app-manager-handle-file", {
+        type: typeStr,
+      });
+    } else {
+      document.l10n.setAttributes(appDescElem, "app-manager-handle-protocol", {
+        type: this.handlerInfo.typeDescription.raw,
+      });
+    }
+
+    let list = document.getElementById("appList");
+    let listFragment = document.createDocumentFragment();
+    for (let app of this.handlerInfo.possibleApplicationHandlers.enumerate()) {
+      if (!gMainPane.isValidHandlerApp(app)) {
+        continue;
+      }
+
+      let item = document.createXULElement("richlistitem");
+      listFragment.append(item);
+      item.app = app;
+
+      let image = document.createXULElement("image");
+      image.setAttribute("src", gMainPane._getIconURLForHandlerApp(app));
+      item.appendChild(image);
+
+      let label = document.createXULElement("label");
+      label.setAttribute("value", app.name);
+      item.appendChild(label);
+    }
+    list.append(listFragment);
+
+    // Triggers onSelect which populates label
+    list.selectedIndex = 0;
+
+    // We want to block on those elements being localized because the
+    // result will impact the size of the subdialog.
+    await document.l10n.translateElements([
+      appDescElem,
+      document.getElementById("appType"),
+    ]);
+  },
+
+  onOK: function appManager_onOK() {
+    if (this._removed.length) {
+      for (var i = 0; i < this._removed.length; ++i) {
+        this.handlerInfo.removePossibleApplicationHandler(this._removed[i]);
+      }
+
+      this.handlerInfo.store();
+    }
+  },
+
+  remove: function appManager_remove() {
+    var list = document.getElementById("appList");
+    this._removed.push(list.selectedItem.app);
+    var index = list.selectedIndex;
+    var element = list.selectedItem;
+    list.removeItemFromSelection(element);
+    element.remove();
+    if (list.itemCount == 0) {
+      // The list is now empty, make the bottom part disappear
+      document.getElementById("appDetails").hidden = true;
+    } else {
+      // Select the item at the same index, if we removed the last
+      // item of the list, select the previous item
+      if (index == list.itemCount) {
+        --index;
+      }
+      list.selectedIndex = index;
+    }
+  },
+
+  onSelect: function appManager_onSelect() {
+    var list = document.getElementById("appList");
+    if (!list.selectedItem) {
+      document.getElementById("remove").disabled = true;
+      return;
+    }
+    document.getElementById("remove").disabled = false;
+    var app = list.selectedItem.app;
+    var address = "";
+    if (app instanceof Ci.nsILocalHandlerApp) {
+      address = app.executable.path;
+    } else if (app instanceof Ci.nsIWebHandlerApp) {
+      address = app.uriTemplate;
+    }
+    document.getElementById("appLocation").value = address;
+    const l10nId =
+      app instanceof Ci.nsILocalHandlerApp
+        ? "app-manager-local-app-info"
+        : "app-manager-web-app-info";
+    const appTypeElem = document.getElementById("appType");
+    document.l10n.setAttributes(appTypeElem, l10nId);
+  },
+};
diff --git a/browser/components/preferences/dialogs/applicationManager.xhtml b/browser/components/preferences/dialogs/applicationManager.xhtml
new file mode 100644
index 0000000000..f618543530
--- /dev/null
+++ b/browser/components/preferences/dialogs/applicationManager.xhtml
@@ -0,0 +1,71 @@
+<?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/. -->
+
+<window
+  xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"
+  xmlns:html="http://www.w3.org/1999/xhtml"
+  onload="gAppManagerDialog.onLoad();"
+  data-l10n-id="app-manager-window2"
+  data-l10n-attrs="title, style"
+>
+  <dialog id="appManager" buttons="accept,cancel">
+    <linkset>
+      <html:link rel="stylesheet" href="chrome://global/skin/global.css" />
+      <html:link
+        rel="stylesheet"
+        href="chrome://browser/skin/preferences/applications.css"
+      />
+
+      <html:link
+        rel="localization"
+        href="browser/preferences/applicationManager.ftl"
+      />
+    </linkset>
+
+    <script src="chrome://browser/content/utilityOverlay.js" />
+    <script src="chrome://global/content/preferencesBindings.js" />
+    <script src="chrome://browser/content/preferences/dialogs/applicationManager.js" />
+
+    <commandset id="appManagerCommandSet">
+      <command
+        id="cmd_remove"
+        oncommand="gAppManagerDialog.remove();"
+        disabled="true"
+      />
+    </commandset>
+
+    <keyset id="appManagerKeyset">
+      <key id="delete" keycode="VK_DELETE" command="cmd_remove" />
+    </keyset>
+
+    <description id="appDescription" />
+    <separator class="thin" />
+    <hbox flex="1">
+      <richlistbox
+        id="appList"
+        onselect="gAppManagerDialog.onSelect();"
+        flex="1"
+      />
+      <vbox>
+        <button
+          id="remove"
+          data-l10n-id="app-manager-remove"
+          command="cmd_remove"
+        />
+        <spacer flex="1" />
+      </vbox>
+    </hbox>
+    <vbox id="appDetails">
+      <separator class="thin" />
+      <label id="appType" />
+      <html:input
+        type="text"
+        id="appLocation"
+        readonly="readonly"
+        style="margin-inline: 0"
+      />
+    </vbox>
+  </dialog>
+</window>
diff --git a/browser/components/preferences/dialogs/blocklists.js b/browser/components/preferences/dialogs/blocklists.js
new file mode 100644
index 0000000000..c28ee09f96
--- /dev/null
+++ b/browser/components/preferences/dialogs/blocklists.js
@@ -0,0 +1,175 @@
+/* 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/. */
+
+const BASE_LIST_ID = "base";
+const CONTENT_LIST_ID = "content";
+const TRACK_SUFFIX = "-track-digest256";
+const TRACKING_TABLE_PREF = "urlclassifier.trackingTable";
+const LISTS_PREF_BRANCH = "browser.safebrowsing.provider.mozilla.lists.";
+
+var gBlocklistManager = {
+  _type: "",
+  _blockLists: [],
+  _tree: null,
+
+  _view: {
+    _rowCount: 0,
+    get rowCount() {
+      return this._rowCount;
+    },
+    getCellText(row, column) {
+      if (column.id == "listCol") {
+        let list = gBlocklistManager._blockLists[row];
+        return list.name;
+      }
+      return "";
+    },
+
+    isSeparator(index) {
+      return false;
+    },
+    isSorted() {
+      return false;
+    },
+    isContainer(index) {
+      return false;
+    },
+    setTree(tree) {},
+    getImageSrc(row, column) {},
+    getCellValue(row, column) {
+      if (column.id == "selectionCol") {
+        return gBlocklistManager._blockLists[row].selected;
+      }
+      return undefined;
+    },
+    cycleHeader(column) {},
+    getRowProperties(row) {
+      return "";
+    },
+    getColumnProperties(column) {
+      return "";
+    },
+    getCellProperties(row, column) {
+      if (column.id == "selectionCol") {
+        return "checkmark";
+      }
+
+      return "";
+    },
+  },
+
+  onLoad() {
+    this.init();
+    document.addEventListener("dialogaccept", () => this.onApplyChanges());
+  },
+
+  init() {
+    if (this._type) {
+      // reusing an open dialog, clear the old observer
+      this.uninit();
+    }
+
+    this._type = "tracking";
+
+    this._loadBlockLists();
+  },
+
+  uninit() {},
+
+  onListSelected() {
+    for (let list of this._blockLists) {
+      list.selected = false;
+    }
+    this._blockLists[this._tree.currentIndex].selected = true;
+
+    this._updateTree();
+  },
+
+  onApplyChanges() {
+    let activeList = this._getActiveList();
+    let selected = null;
+    for (let list of this._blockLists) {
+      if (list.selected) {
+        selected = list;
+        break;
+      }
+    }
+
+    if (activeList !== selected.id) {
+      let trackingTable = Services.prefs.getCharPref(TRACKING_TABLE_PREF);
+      if (selected.id != CONTENT_LIST_ID) {
+        trackingTable = trackingTable.replace(
+          "," + CONTENT_LIST_ID + TRACK_SUFFIX,
+          ""
+        );
+      } else {
+        trackingTable += "," + CONTENT_LIST_ID + TRACK_SUFFIX;
+      }
+      Services.prefs.setCharPref(TRACKING_TABLE_PREF, trackingTable);
+
+      // Force an update after changing the tracking protection table.
+      let listmanager = Cc[
+        "@mozilla.org/url-classifier/listmanager;1"
+      ].getService(Ci.nsIUrlListManager);
+      if (listmanager) {
+        listmanager.forceUpdates(trackingTable);
+      }
+    }
+  },
+
+  async _loadBlockLists() {
+    this._blockLists = [];
+
+    // Load blocklists into a table.
+    let branch = Services.prefs.getBranch(LISTS_PREF_BRANCH);
+    let itemArray = branch.getChildList("");
+    for (let itemName of itemArray) {
+      try {
+        let list = await this._createBlockList(itemName);
+        this._blockLists.push(list);
+      } catch (e) {
+        // Ignore bogus or missing list name.
+        continue;
+      }
+    }
+
+    this._updateTree();
+  },
+
+  async _createBlockList(id) {
+    let branch = Services.prefs.getBranch(LISTS_PREF_BRANCH);
+    let l10nKey = branch.getCharPref(id);
+
+    // eslint-disable-next-line mozilla/prefer-formatValues
+    let [listName, description] = await document.l10n.formatValues([
+      { id: `blocklist-item-${l10nKey}-listName` },
+      { id: `blocklist-item-${l10nKey}-description` },
+    ]);
+
+    // eslint-disable-next-line mozilla/prefer-formatValues
+    let name = await document.l10n.formatValue("blocklist-item-list-template", {
+      listName,
+      description,
+    });
+
+    return {
+      id,
+      name,
+      selected: this._getActiveList() === id,
+    };
+  },
+
+  _updateTree() {
+    this._tree = document.getElementById("blocklistsTree");
+    this._view._rowCount = this._blockLists.length;
+    this._tree.view = this._view;
+  },
+
+  _getActiveList() {
+    let trackingTable = Services.prefs.getCharPref(TRACKING_TABLE_PREF);
+    return trackingTable.includes(CONTENT_LIST_ID)
+      ? CONTENT_LIST_ID
+      : BASE_LIST_ID;
+  },
+};
diff --git a/browser/components/preferences/dialogs/blocklists.xhtml b/browser/components/preferences/dialogs/blocklists.xhtml
new file mode 100644
index 0000000000..8471847df2
--- /dev/null
+++ b/browser/components/preferences/dialogs/blocklists.xhtml
@@ -0,0 +1,83 @@
+<?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/. -->
+
+<window
+  id="BlocklistsDialog"
+  data-l10n-id="blocklist-window2"
+  data-l10n-attrs="title, style"
+  xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"
+  xmlns:html="http://www.w3.org/1999/xhtml"
+  onload="gBlocklistManager.onLoad();"
+  onunload="gBlocklistManager.uninit();"
+  persist="width height"
+>
+  <dialog
+    buttons="accept,cancel"
+    data-l10n-id="blocklist-dialog"
+    data-l10n-attrs="buttonlabelaccept, buttonaccesskeyaccept"
+  >
+    <linkset>
+      <html:link rel="stylesheet" href="chrome://global/skin/global.css" />
+      <html:link
+        rel="stylesheet"
+        href="chrome://browser/skin/preferences/preferences.css"
+      />
+
+      <html:link rel="localization" href="branding/brand.ftl" />
+      <html:link rel="localization" href="browser/preferences/blocklists.ftl" />
+    </linkset>
+
+    <script src="chrome://browser/content/preferences/dialogs/blocklists.js" />
+
+    <keyset>
+      <key
+        data-l10n-id="blocklist-close-key"
+        modifiers="accel"
+        oncommand="window.close();"
+      />
+    </keyset>
+
+    <vbox class="contentPane">
+      <description
+        id="blocklistsText"
+        data-l10n-id="blocklist-description"
+        control="url"
+      >
+        <html:a
+          target="_blank"
+          class="text-link"
+          data-l10n-name="disconnect-link"
+          href="https://disconnect.me/"
+        />
+      </description>
+      <separator class="thin" />
+      <tree
+        id="blocklistsTree"
+        flex="1"
+        style="height: 18em"
+        hidecolumnpicker="true"
+        onselect="gBlocklistManager.onListSelected();"
+      >
+        <treecols>
+          <treecol
+            id="selectionCol"
+            label=""
+            style="flex: 1 auto"
+            sortable="false"
+            type="checkbox"
+          />
+          <treecol
+            id="listCol"
+            data-l10n-id="blocklist-treehead-list"
+            style="flex: 80 80 auto"
+            sortable="false"
+          />
+        </treecols>
+        <treechildren />
+      </tree>
+    </vbox>
+  </dialog>
+</window>
diff --git a/browser/components/preferences/dialogs/browserLanguages.js b/browser/components/preferences/dialogs/browserLanguages.js
new file mode 100644
index 0000000000..a54d9f299b
--- /dev/null
+++ b/browser/components/preferences/dialogs/browserLanguages.js
@@ -0,0 +1,728 @@
+/* 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-globals-from /toolkit/content/preferencesBindings.js */
+
+// This is exported by preferences.js but we can't import that in a subdialog.
+let { LangPackMatcher } = window.top;
+
+ChromeUtils.defineESModuleGetters(this, {
+  AddonManager: "resource://gre/modules/AddonManager.sys.mjs",
+  AddonRepository: "resource://gre/modules/addons/AddonRepository.sys.mjs",
+  RemoteSettings: "resource://services-settings/remote-settings.sys.mjs",
+  SelectionChangedMenulist:
+    "resource:///modules/SelectionChangedMenulist.sys.mjs",
+});
+
+document
+  .getElementById("BrowserLanguagesDialog")
+  .addEventListener("dialoghelp", window.top.openPrefsHelp);
+
+/* This dialog provides an interface for managing what language the browser is
+ * displayed in.
+ *
+ * There is a list of "requested" locales and a list of "available" locales. The
+ * requested locales must be installed and enabled. Available locales could be
+ * installed and enabled, or fetched from the AMO language tools API.
+ *
+ * If a langpack is disabled, there is no way to determine what locale it is for and
+ * it will only be listed as available if that locale is also available on AMO and
+ * the user has opted to search for more languages.
+ */
+
+async function installFromUrl(url, hash, callback) {
+  let telemetryInfo = {
+    source: "about:preferences",
+  };
+  let install = await AddonManager.getInstallForURL(url, {
+    hash,
+    telemetryInfo,
+  });
+  if (callback) {
+    callback(install.installId.toString());
+  }
+  await install.install();
+  return install.addon;
+}
+
+async function dictionaryIdsForLocale(locale) {
+  let entries = await RemoteSettings("language-dictionaries").get({
+    filters: { id: locale },
+  });
+  if (entries.length) {
+    return entries[0].dictionaries;
+  }
+  return [];
+}
+
+class OrderedListBox {
+  constructor({
+    richlistbox,
+    upButton,
+    downButton,
+    removeButton,
+    onRemove,
+    onReorder,
+  }) {
+    this.richlistbox = richlistbox;
+    this.upButton = upButton;
+    this.downButton = downButton;
+    this.removeButton = removeButton;
+    this.onRemove = onRemove;
+    this.onReorder = onReorder;
+
+    this.items = [];
+
+    this.richlistbox.addEventListener("select", () => this.setButtonState());
+    this.upButton.addEventListener("command", () => this.moveUp());
+    this.downButton.addEventListener("command", () => this.moveDown());
+    this.removeButton.addEventListener("command", () => this.removeItem());
+  }
+
+  get selectedItem() {
+    return this.items[this.richlistbox.selectedIndex];
+  }
+
+  setButtonState() {
+    let { upButton, downButton, removeButton } = this;
+    let { selectedIndex, itemCount } = this.richlistbox;
+    upButton.disabled = selectedIndex <= 0;
+    downButton.disabled = selectedIndex == itemCount - 1;
+    removeButton.disabled = itemCount <= 1 || !this.selectedItem.canRemove;
+  }
+
+  moveUp() {
+    let { selectedIndex } = this.richlistbox;
+    if (selectedIndex == 0) {
+      return;
+    }
+    let { items } = this;
+    let selectedItem = items[selectedIndex];
+    let prevItem = items[selectedIndex - 1];
+    items[selectedIndex - 1] = items[selectedIndex];
+    items[selectedIndex] = prevItem;
+    let prevEl = document.getElementById(prevItem.id);
+    let selectedEl = document.getElementById(selectedItem.id);
+    this.richlistbox.insertBefore(selectedEl, prevEl);
+    this.richlistbox.ensureElementIsVisible(selectedEl);
+    this.setButtonState();
+
+    this.onReorder();
+  }
+
+  moveDown() {
+    let { selectedIndex } = this.richlistbox;
+    if (selectedIndex == this.items.length - 1) {
+      return;
+    }
+    let { items } = this;
+    let selectedItem = items[selectedIndex];
+    let nextItem = items[selectedIndex + 1];
+    items[selectedIndex + 1] = items[selectedIndex];
+    items[selectedIndex] = nextItem;
+    let nextEl = document.getElementById(nextItem.id);
+    let selectedEl = document.getElementById(selectedItem.id);
+    this.richlistbox.insertBefore(nextEl, selectedEl);
+    this.richlistbox.ensureElementIsVisible(selectedEl);
+    this.setButtonState();
+
+    this.onReorder();
+  }
+
+  removeItem() {
+    let { selectedIndex } = this.richlistbox;
+
+    if (selectedIndex == -1) {
+      return;
+    }
+
+    let [item] = this.items.splice(selectedIndex, 1);
+    this.richlistbox.selectedItem.remove();
+    this.richlistbox.selectedIndex = Math.min(
+      selectedIndex,
+      this.richlistbox.itemCount - 1
+    );
+    this.richlistbox.ensureElementIsVisible(this.richlistbox.selectedItem);
+    this.onRemove(item);
+  }
+
+  setItems(items) {
+    this.items = items;
+    this.populate();
+    this.setButtonState();
+  }
+
+  /**
+   * Add an item to the top of the ordered list.
+   *
+   * @param {object} item The item to insert.
+   */
+  addItem(item) {
+    this.items.unshift(item);
+    this.richlistbox.insertBefore(
+      this.createItem(item),
+      this.richlistbox.firstElementChild
+    );
+    this.richlistbox.selectedIndex = 0;
+    this.richlistbox.ensureElementIsVisible(this.richlistbox.selectedItem);
+  }
+
+  populate() {
+    this.richlistbox.textContent = "";
+
+    let frag = document.createDocumentFragment();
+    for (let item of this.items) {
+      frag.appendChild(this.createItem(item));
+    }
+    this.richlistbox.appendChild(frag);
+
+    this.richlistbox.selectedIndex = 0;
+    this.richlistbox.ensureElementIsVisible(this.richlistbox.selectedItem);
+  }
+
+  createItem({ id, label, value }) {
+    let listitem = document.createXULElement("richlistitem");
+    listitem.id = id;
+    listitem.setAttribute("value", value);
+
+    let labelEl = document.createXULElement("label");
+    labelEl.textContent = label;
+    listitem.appendChild(labelEl);
+
+    return listitem;
+  }
+}
+
+/**
+ * The sorted select list of Locales available for the app.
+ */
+class SortedItemSelectList {
+  constructor({ menulist, button, onSelect, onChange, compareFn }) {
+    /** @type {XULElement} */
+    this.menulist = menulist;
+
+    /** @type {XULElement} */
+    this.popup = menulist.menupopup;
+
+    /** @type {XULElement} */
+    this.button = button;
+
+    /** @type {(a: LocaleDisplayInfo, b: LocaleDisplayInfo) => number} */
+    this.compareFn = compareFn;
+
+    /** @type {Array<LocaleDisplayInfo>} */
+    this.items = [];
+
+    // This will register the "command" listener.
+    new SelectionChangedMenulist(this.menulist, () => {
+      button.disabled = !menulist.selectedItem;
+      if (menulist.selectedItem) {
+        onChange(this.items[menulist.selectedIndex]);
+      }
+    });
+    button.addEventListener("command", () => {
+      if (!menulist.selectedItem) {
+        return;
+      }
+
+      let [item] = this.items.splice(menulist.selectedIndex, 1);
+      menulist.selectedItem.remove();
+      menulist.setAttribute("label", menulist.getAttribute("placeholder"));
+      button.disabled = true;
+      menulist.disabled = menulist.itemCount == 0;
+      menulist.selectedIndex = -1;
+
+      onSelect(item);
+    });
+  }
+
+  /**
+   * @param {Array<LocaleDisplayInfo>} items
+   */
+  setItems(items) {
+    this.items = items.sort(this.compareFn);
+    this.populate();
+  }
+
+  populate() {
+    let { button, items, menulist, popup } = this;
+    popup.textContent = "";
+
+    let frag = document.createDocumentFragment();
+    for (let item of items) {
+      frag.appendChild(this.createItem(item));
+    }
+    popup.appendChild(frag);
+
+    menulist.setAttribute("label", menulist.getAttribute("placeholder"));
+    menulist.disabled = menulist.itemCount == 0;
+    menulist.selectedIndex = -1;
+    button.disabled = true;
+  }
+
+  /**
+   * Add an item to the list sorted by the label.
+   *
+   * @param {object} item The item to insert.
+   */
+  addItem(item) {
+    let { compareFn, items, menulist, popup } = this;
+
+    // Find the index of the item to insert before.
+    let i = items.findIndex(el => compareFn(el, item) >= 0);
+    items.splice(i, 0, item);
+    popup.insertBefore(this.createItem(item), menulist.getItemAtIndex(i));
+
+    menulist.disabled = menulist.itemCount == 0;
+  }
+
+  createItem({ label, value, className, disabled }) {
+    let item = document.createXULElement("menuitem");
+    item.setAttribute("label", label);
+    if (value) {
+      item.value = value;
+    }
+    if (className) {
+      item.classList.add(className);
+    }
+    if (disabled) {
+      item.setAttribute("disabled", "true");
+    }
+    return item;
+  }
+
+  /**
+   * Disable the inputs and set a data-l10n-id on the menulist. This can be
+   * reverted with `enableWithMessageId()`.
+   */
+  disableWithMessageId(messageId) {
+    document.l10n.setAttributes(this.menulist, messageId);
+    this.menulist.setAttribute(
+      "image",
+      "chrome://browser/skin/tabbrowser/tab-connecting.png"
+    );
+    this.menulist.disabled = true;
+    this.button.disabled = true;
+  }
+
+  /**
+   * Enable the inputs and set a data-l10n-id on the menulist. This can be
+   * reverted with `disableWithMessageId()`.
+   */
+  enableWithMessageId(messageId) {
+    document.l10n.setAttributes(this.menulist, messageId);
+    this.menulist.removeAttribute("image");
+    this.menulist.disabled = this.menulist.itemCount == 0;
+    this.button.disabled = !this.menulist.selectedItem;
+  }
+}
+
+/**
+ * @typedef LocaleDisplayInfo
+ * @type {object}
+ * @prop {string} id - A unique ID.
+ * @prop {string} label - The localized display name.
+ * @prop {string} value - The BCP 47 locale identifier or the word "search".
+ * @prop {boolean} canRemove - Locales that are part of the packaged locales cannot be
+ *                             removed.
+ * @prop {boolean} installed - Whether or not the locale is installed.
+ */
+
+/**
+ * @param {Array<string>} localeCodes - List of BCP 47 locale identifiers.
+ * @returns {Array<LocaleDisplayInfo>}
+ */
+async function getLocaleDisplayInfo(localeCodes) {
+  let availableLocales = new Set(await LangPackMatcher.getAvailableLocales());
+  let packagedLocales = new Set(Services.locale.packagedLocales);
+  let localeNames = Services.intl.getLocaleDisplayNames(
+    undefined,
+    localeCodes,
+    { preferNative: true }
+  );
+  return localeCodes.map((code, i) => {
+    return {
+      id: "locale-" + code,
+      label: localeNames[i],
+      value: code,
+      canRemove: !packagedLocales.has(code),
+      installed: availableLocales.has(code),
+    };
+  });
+}
+
+/**
+ * @param {LocaleDisplayInfo} a
+ * @param {LocaleDisplayInfo} b
+ * @returns {number}
+ */
+function compareItems(a, b) {
+  // Sort by installed.
+  if (a.installed != b.installed) {
+    return a.installed ? -1 : 1;
+
+    // The search label is always last.
+  } else if (a.value == "search") {
+    return 1;
+  } else if (b.value == "search") {
+    return -1;
+
+    // If both items are locales, sort by label.
+  } else if (a.value && b.value) {
+    return a.label.localeCompare(b.label);
+
+    // One of them is a label, put it first.
+  } else if (a.value) {
+    return 1;
+  }
+  return -1;
+}
+
+var gBrowserLanguagesDialog = {
+  /**
+   * The publicly readable list of selected locales. It is only set when the dialog is
+   * accepted, and can be retrieved elsewhere by directly reading the property
+   * on gBrowserLanguagesDialog.
+   *
+   *   let { selected } = gBrowserLanguagesDialog;
+   *
+   * @type {null | Array<string>}
+   */
+  selected: null,
+
+  /**
+   * @type {string | null} An ID used for telemetry pings. It is unique to the current
+   * opening of the browser language.
+   */
+  _telemetryId: null,
+
+  /**
+   * @type {SortedItemSelectList}
+   */
+  _availableLocalesUI: null,
+
+  /**
+   * @type {OrderedListBox}
+   */
+  _selectedLocalesUI: null,
+
+  get downloadEnabled() {
+    // Downloading langpacks isn't always supported, check the pref.
+    return Services.prefs.getBoolPref("intl.multilingual.downloadEnabled");
+  },
+
+  recordTelemetry(method, extra = null) {
+    Services.telemetry.recordEvent(
+      "intl.ui.browserLanguage",
+      method,
+      "dialog",
+      this._telemetryId,
+      extra
+    );
+  },
+
+  async onLoad() {
+    /**
+     * @typedef {Object} Options - Options passed in to configure the subdialog.
+     * @property {string} telemetryId,
+     * @property {Array<string>} [selectedLocalesForRestart] The optional list of
+     *   previously selected locales for when a restart is required. This list is
+     *   preserved between openings of the dialog.
+     * @property {boolean} search Whether the user opened this from "Search for more
+     *   languages" option.
+     */
+
+    /** @type {Options} */
+    let { telemetryId, selectedLocalesForRestart, search } =
+      window.arguments[0];
+
+    this._telemetryId = telemetryId;
+
+    // This is a list of available locales that the user selected. It's more
+    // restricted than the Intl notion of `requested` as it only contains
+    // locale codes for which we have matching locales available.
+    // The first time this dialog is opened, populate with appLocalesAsBCP47.
+    let selectedLocales =
+      selectedLocalesForRestart || Services.locale.appLocalesAsBCP47;
+    let selectedLocaleSet = new Set(selectedLocales);
+    let available = await LangPackMatcher.getAvailableLocales();
+    let availableSet = new Set(available);
+
+    // Filter selectedLocales since the user may select a locale when it is
+    // available and then disable it.
+    selectedLocales = selectedLocales.filter(locale =>
+      availableSet.has(locale)
+    );
+    // Nothing in available should be in selectedSet.
+    available = available.filter(locale => !selectedLocaleSet.has(locale));
+
+    await this.initSelectedLocales(selectedLocales);
+    await this.initAvailableLocales(available, search);
+
+    this.initialized = true;
+
+    // Now the component is initialized, it's safe to accept the results.
+    document
+      .getElementById("BrowserLanguagesDialog")
+      .addEventListener("beforeaccept", () => {
+        this.selected = this._selectedLocalesUI.items.map(item => item.value);
+      });
+  },
+
+  /**
+   * @param {string[]} selectedLocales - BCP 47 locale identifiers
+   */
+  async initSelectedLocales(selectedLocales) {
+    this._selectedLocalesUI = new OrderedListBox({
+      richlistbox: document.getElementById("selectedLocales"),
+      upButton: document.getElementById("up"),
+      downButton: document.getElementById("down"),
+      removeButton: document.getElementById("remove"),
+      onRemove: item => this.selectedLocaleRemoved(item),
+      onReorder: () => this.recordTelemetry("reorder"),
+    });
+    this._selectedLocalesUI.setItems(
+      await getLocaleDisplayInfo(selectedLocales)
+    );
+  },
+
+  /**
+   * @param {Set<string>} available - The set of available BCP 47 locale identifiers.
+   * @param {boolean} search - Whether the user opened this from "Search for more
+   *                           languages" option.
+   */
+  async initAvailableLocales(available, search) {
+    this._availableLocalesUI = new SortedItemSelectList({
+      menulist: document.getElementById("availableLocales"),
+      button: document.getElementById("add"),
+      compareFn: compareItems,
+      onSelect: item => this.availableLanguageSelected(item),
+      onChange: item => {
+        this.hideError();
+        if (item.value == "search") {
+          // Record the search event here so we don't track the search from
+          // the main preferences pane twice.
+          this.recordTelemetry("search");
+          this.loadLocalesFromAMO();
+        }
+      },
+    });
+
+    // Populate the list with the installed locales even if the user is
+    // searching in case the download fails.
+    await this.loadLocalesFromInstalled(available);
+
+    // If the user opened this from the "Search for more languages" option,
+    // search AMO for available locales.
+    if (search) {
+      return this.loadLocalesFromAMO();
+    }
+
+    return undefined;
+  },
+
+  async loadLocalesFromAMO() {
+    if (!this.downloadEnabled) {
+      return;
+    }
+
+    // Disable the dropdown while we hit the network.
+    this._availableLocalesUI.disableWithMessageId(
+      "browser-languages-searching"
+    );
+
+    // Fetch the available langpacks from AMO.
+    let availableLangpacks;
+    try {
+      availableLangpacks = await AddonRepository.getAvailableLangpacks();
+    } catch (e) {
+      this.showError();
+      return;
+    }
+
+    // Store the available langpack info for later use.
+    this.availableLangpacks = new Map();
+    for (let { target_locale, url, hash } of availableLangpacks) {
+      this.availableLangpacks.set(target_locale, { url, hash });
+    }
+
+    // Remove the installed locales from the available ones.
+    let installedLocales = new Set(await LangPackMatcher.getAvailableLocales());
+    let notInstalledLocales = availableLangpacks
+      .filter(({ target_locale }) => !installedLocales.has(target_locale))
+      .map(lang => lang.target_locale);
+
+    // Create the rows for the remote locales.
+    let availableItems = await getLocaleDisplayInfo(notInstalledLocales);
+    availableItems.push({
+      label: await document.l10n.formatValue(
+        "browser-languages-available-label"
+      ),
+      className: "label-item",
+      disabled: true,
+      installed: false,
+    });
+
+    // Remove the search option and add the remote locales.
+    let items = this._availableLocalesUI.items;
+    items.pop();
+    items = items.concat(availableItems);
+
+    // Update the dropdown and enable it again.
+    this._availableLocalesUI.setItems(items);
+    this._availableLocalesUI.enableWithMessageId(
+      "browser-languages-select-language"
+    );
+  },
+
+  /**
+   * @param {Set<string>} available - The set of available (BCP 47) locales.
+   */
+  async loadLocalesFromInstalled(available) {
+    let items;
+    if (available.length) {
+      items = await getLocaleDisplayInfo(available);
+      items.push(await this.createInstalledLabel());
+    } else {
+      items = [];
+    }
+    if (this.downloadEnabled) {
+      items.push({
+        label: await document.l10n.formatValue("browser-languages-search"),
+        value: "search",
+      });
+    }
+    this._availableLocalesUI.setItems(items);
+  },
+
+  /**
+   * @param {LocaleDisplayInfo} item
+   */
+  async availableLanguageSelected(item) {
+    if ((await LangPackMatcher.getAvailableLocales()).includes(item.value)) {
+      this.recordTelemetry("add");
+      await this.requestLocalLanguage(item);
+    } else if (this.availableLangpacks.has(item.value)) {
+      // Telemetry is tracked in requestRemoteLanguage.
+      await this.requestRemoteLanguage(item);
+    } else {
+      this.showError();
+    }
+  },
+
+  /**
+   * @param {LocaleDisplayInfo} item
+   */
+  async requestLocalLanguage(item) {
+    this._selectedLocalesUI.addItem(item);
+    let selectedCount = this._selectedLocalesUI.items.length;
+    let availableCount = (await LangPackMatcher.getAvailableLocales()).length;
+    if (selectedCount == availableCount) {
+      // Remove the installed label, they're all installed.
+      this._availableLocalesUI.items.shift();
+      this._availableLocalesUI.setItems(this._availableLocalesUI.items);
+    }
+    // The label isn't always reset when the selected item is removed, so set it again.
+    this._availableLocalesUI.enableWithMessageId(
+      "browser-languages-select-language"
+    );
+  },
+
+  /**
+   * @param {LocaleDisplayInfo} item
+   */
+  async requestRemoteLanguage(item) {
+    this._availableLocalesUI.disableWithMessageId(
+      "browser-languages-downloading"
+    );
+
+    let { url, hash } = this.availableLangpacks.get(item.value);
+    let addon;
+
+    try {
+      addon = await installFromUrl(url, hash, installId =>
+        this.recordTelemetry("add", { installId })
+      );
+    } catch (e) {
+      this.showError();
+      return;
+    }
+
+    // If the add-on was previously installed, it might be disabled still.
+    if (addon.userDisabled) {
+      await addon.enable();
+    }
+
+    item.installed = true;
+    this._selectedLocalesUI.addItem(item);
+    this._availableLocalesUI.enableWithMessageId(
+      "browser-languages-select-language"
+    );
+
+    // This is an async task that will install the recommended dictionaries for
+    // this locale. This will fail silently at least until a management UI is
+    // added in bug 1493705.
+    this.installDictionariesForLanguage(item.value);
+  },
+
+  /**
+   * @param {string} locale The BCP 47 locale identifier
+   */
+  async installDictionariesForLanguage(locale) {
+    try {
+      let ids = await dictionaryIdsForLocale(locale);
+      let addonInfos = await AddonRepository.getAddonsByIDs(ids);
+      await Promise.all(
+        addonInfos.map(info => installFromUrl(info.sourceURI.spec))
+      );
+    } catch (e) {
+      console.error(e);
+    }
+  },
+
+  showError() {
+    document.getElementById("warning-message").hidden = false;
+    this._availableLocalesUI.enableWithMessageId(
+      "browser-languages-select-language"
+    );
+
+    // The height has likely changed, find our SubDialog and tell it to resize.
+    requestAnimationFrame(() => {
+      let dialogs = window.opener.gSubDialog._dialogs;
+      let index = dialogs.findIndex(d => d._frame.contentDocument == document);
+      if (index != -1) {
+        dialogs[index].resizeDialog();
+      }
+    });
+  },
+
+  hideError() {
+    document.getElementById("warning-message").hidden = true;
+  },
+
+  /**
+   * @param {LocaleDisplayInfo} item
+   */
+  async selectedLocaleRemoved(item) {
+    this.recordTelemetry("remove");
+
+    this._availableLocalesUI.addItem(item);
+
+    // If the item we added is at the top of the list, it needs the label.
+    if (this._availableLocalesUI.items[0] == item) {
+      this._availableLocalesUI.addItem(await this.createInstalledLabel());
+    }
+  },
+
+  async createInstalledLabel() {
+    return {
+      label: await document.l10n.formatValue(
+        "browser-languages-installed-label"
+      ),
+      className: "label-item",
+      disabled: true,
+      installed: true,
+    };
+  },
+};
diff --git a/browser/components/preferences/dialogs/browserLanguages.xhtml b/browser/components/preferences/dialogs/browserLanguages.xhtml
new file mode 100644
index 0000000000..2a404f4aa8
--- /dev/null
+++ b/browser/components/preferences/dialogs/browserLanguages.xhtml
@@ -0,0 +1,87 @@
+<?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/. -->
+
+<window
+  type="child"
+  xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"
+  xmlns:html="http://www.w3.org/1999/xhtml"
+  data-l10n-id="browser-languages-window2"
+  data-l10n-attrs="title, style"
+  onload="gBrowserLanguagesDialog.onLoad();"
+>
+  <dialog
+    id="BrowserLanguagesDialog"
+    buttons="accept,cancel,help"
+    helpTopic="change-language"
+  >
+    <linkset>
+      <html:link rel="stylesheet" href="chrome://global/skin/global.css" />
+      <html:link
+        rel="stylesheet"
+        href="chrome://browser/skin/preferences/preferences.css"
+      />
+
+      <html:link rel="localization" href="branding/brand.ftl" />
+      <html:link rel="localization" href="browser/preferences/languages.ftl" />
+    </linkset>
+
+    <script src="chrome://browser/content/utilityOverlay.js" />
+    <script src="chrome://global/content/preferencesBindings.js" />
+    <script src="chrome://browser/content/preferences/dialogs/browserLanguages.js" />
+
+    <description data-l10n-id="browser-languages-description" />
+
+    <box class="languages-grid">
+      <richlistbox id="selectedLocales" />
+      <vbox>
+        <button
+          id="up"
+          class="action-button"
+          disabled="true"
+          data-l10n-id="languages-customize-moveup"
+        />
+        <button
+          id="down"
+          class="action-button"
+          disabled="true"
+          data-l10n-id="languages-customize-movedown"
+        />
+        <button
+          id="remove"
+          class="action-button"
+          disabled="true"
+          data-l10n-id="languages-customize-remove"
+        />
+      </vbox>
+
+      <menulist
+        id="availableLocales"
+        class="available-locales-list"
+        data-l10n-id="browser-languages-select-language"
+        data-l10n-attrs="placeholder,label"
+      >
+        <menupopup />
+      </menulist>
+      <button
+        id="add"
+        class="add-browser-language action-button"
+        data-l10n-id="languages-customize-add"
+        disabled="true"
+      />
+    </box>
+    <hbox
+      id="warning-message"
+      class="message-bar message-bar-warning"
+      hidden="true"
+    >
+      <html:img class="message-bar-icon" />
+      <description
+        class="message-bar-description"
+        data-l10n-id="browser-languages-error"
+      />
+    </hbox>
+  </dialog>
+</window>
diff --git a/browser/components/preferences/dialogs/clearSiteData.css b/browser/components/preferences/dialogs/clearSiteData.css
new file mode 100644
index 0000000000..5b1f5bbe2d
--- /dev/null
+++ b/browser/components/preferences/dialogs/clearSiteData.css
@@ -0,0 +1,20 @@
+/* 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/. */
+
+.options-container {
+  background-color: var(--in-content-box-background);
+  border: 1px solid var(--in-content-box-border-color);
+  border-radius: 2px;
+  color: var(--in-content-text-color);
+  padding: 0.5em;
+}
+
+.option {
+  padding-bottom: 8px;
+}
+
+.option-description {
+  color: var(--text-color-deemphasized);
+  margin-top: -0.5em !important;
+}
diff --git a/browser/components/preferences/dialogs/clearSiteData.js b/browser/components/preferences/dialogs/clearSiteData.js
new file mode 100644
index 0000000000..061534b52a
--- /dev/null
+++ b/browser/components/preferences/dialogs/clearSiteData.js
@@ -0,0 +1,96 @@
+/* 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/. */
+
+const { SiteDataManager } = ChromeUtils.importESModule(
+  "resource:///modules/SiteDataManager.sys.mjs"
+);
+
+ChromeUtils.defineESModuleGetters(this, {
+  DownloadUtils: "resource://gre/modules/DownloadUtils.sys.mjs",
+});
+
+var gClearSiteDataDialog = {
+  _clearSiteDataCheckbox: null,
+  _clearCacheCheckbox: null,
+
+  onLoad() {
+    document.mozSubdialogReady = this.init();
+  },
+
+  async init() {
+    this._dialog = document.querySelector("dialog");
+    this._clearSiteDataCheckbox = document.getElementById("clearSiteData");
+    this._clearCacheCheckbox = document.getElementById("clearCache");
+
+    // We'll block init() on this because the result values may impact
+    // subdialog sizing.
+    await Promise.all([
+      SiteDataManager.getTotalUsage().then(bytes => {
+        let [amount, unit] = DownloadUtils.convertByteUnits(bytes);
+        document.l10n.setAttributes(
+          this._clearSiteDataCheckbox,
+          "clear-site-data-cookies-with-data",
+          { amount, unit }
+        );
+      }),
+      SiteDataManager.getCacheSize().then(bytes => {
+        let [amount, unit] = DownloadUtils.convertByteUnits(bytes);
+        document.l10n.setAttributes(
+          this._clearCacheCheckbox,
+          "clear-site-data-cache-with-data",
+          { amount, unit }
+        );
+      }),
+    ]);
+    await document.l10n.translateElements([
+      this._clearCacheCheckbox,
+      this._clearSiteDataCheckbox,
+    ]);
+
+    document.addEventListener("dialogaccept", event => this.onClear(event));
+
+    this._clearSiteDataCheckbox.addEventListener("command", e =>
+      this.onCheckboxCommand(e)
+    );
+    this._clearCacheCheckbox.addEventListener("command", e =>
+      this.onCheckboxCommand(e)
+    );
+  },
+
+  onCheckboxCommand(event) {
+    this._dialog.setAttribute(
+      "buttondisabledaccept",
+      !(this._clearSiteDataCheckbox.checked || this._clearCacheCheckbox.checked)
+    );
+  },
+
+  onClear(event) {
+    let clearSiteData = this._clearSiteDataCheckbox.checked;
+    let clearCache = this._clearCacheCheckbox.checked;
+
+    if (clearSiteData) {
+      // Ask for confirmation before clearing site data
+      if (!SiteDataManager.promptSiteDataRemoval(window)) {
+        clearSiteData = false;
+        // Prevent closing the dialog when the data removal wasn't allowed.
+        event.preventDefault();
+      }
+    }
+
+    if (clearSiteData) {
+      SiteDataManager.removeSiteData();
+    }
+    if (clearCache) {
+      SiteDataManager.removeCache();
+
+      // If we're not clearing site data, we need to tell the
+      // SiteDataManager to signal that it's updating.
+      if (!clearSiteData) {
+        SiteDataManager.updateSites();
+      }
+    }
+  },
+};
+
+window.addEventListener("load", () => gClearSiteDataDialog.onLoad());
diff --git a/browser/components/preferences/dialogs/clearSiteData.xhtml b/browser/components/preferences/dialogs/clearSiteData.xhtml
new file mode 100644
index 0000000000..784ffc8167
--- /dev/null
+++ b/browser/components/preferences/dialogs/clearSiteData.xhtml
@@ -0,0 +1,76 @@
+<?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/. -->
+
+<window
+  id="ClearSiteDataDialog"
+  xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"
+  xmlns:html="http://www.w3.org/1999/xhtml"
+  data-l10n-id="clear-site-data-window2"
+  data-l10n-attrs="title, style"
+  persist="width height"
+>
+  <dialog
+    buttons="accept,cancel"
+    data-l10n-id="clear-site-data-dialog"
+    data-l10n-attrs="buttonlabelaccept, buttonaccesskeyaccept"
+  >
+    <linkset>
+      <html:link rel="stylesheet" href="chrome://global/skin/global.css" />
+      <html:link
+        rel="stylesheet"
+        href="chrome://browser/skin/preferences/preferences.css"
+      />
+      <html:link
+        rel="stylesheet"
+        href="chrome://browser/content/preferences/dialogs/clearSiteData.css"
+      />
+
+      <html:link rel="localization" href="branding/brand.ftl" />
+      <html:link
+        rel="localization"
+        href="browser/preferences/clearSiteData.ftl"
+      />
+    </linkset>
+    <script src="chrome://browser/content/preferences/dialogs/clearSiteData.js" />
+
+    <keyset>
+      <key
+        data-l10n-id="clear-site-data-close-key"
+        modifiers="accel"
+        oncommand="window.close();"
+      />
+    </keyset>
+
+    <vbox class="contentPane">
+      <description control="url" data-l10n-id="clear-site-data-description" />
+      <separator class="thin" />
+      <vbox class="options-container">
+        <vbox class="option">
+          <checkbox
+            data-l10n-id="clear-site-data-cookies-empty"
+            id="clearSiteData"
+            checked="true"
+          />
+          <description
+            class="option-description indent"
+            data-l10n-id="clear-site-data-cookies-info"
+          />
+        </vbox>
+        <vbox class="option">
+          <checkbox
+            data-l10n-id="clear-site-data-cache-empty"
+            id="clearCache"
+            checked="true"
+          />
+          <description
+            class="option-description indent"
+            data-l10n-id="clear-site-data-cache-info"
+          />
+        </vbox>
+      </vbox>
+    </vbox>
+  </dialog>
+</window>
diff --git a/browser/components/preferences/dialogs/colors.js b/browser/components/preferences/dialogs/colors.js
new file mode 100644
index 0000000000..30b48b2ad0
--- /dev/null
+++ b/browser/components/preferences/dialogs/colors.js
@@ -0,0 +1,18 @@
+/* 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-globals-from /toolkit/content/preferencesBindings.js */
+
+document
+  .getElementById("ColorsDialog")
+  .addEventListener("dialoghelp", window.top.openPrefsHelp);
+
+Preferences.addAll([
+  { id: "browser.display.document_color_use", type: "int" },
+  { id: "browser.anchor_color", type: "string" },
+  { id: "browser.visited_color", type: "string" },
+  { id: "browser.display.foreground_color", type: "string" },
+  { id: "browser.display.background_color", type: "string" },
+  { id: "browser.display.use_system_colors", type: "bool" },
+]);
diff --git a/browser/components/preferences/dialogs/colors.xhtml b/browser/components/preferences/dialogs/colors.xhtml
new file mode 100644
index 0000000000..1720cf3498
--- /dev/null
+++ b/browser/components/preferences/dialogs/colors.xhtml
@@ -0,0 +1,135 @@
+<?xml version="1.0"?>
+
+<!-- -*- 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/. -->
+
+<window
+  type="child"
+  xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"
+  xmlns:html="http://www.w3.org/1999/xhtml"
+  data-l10n-id="colors-dialog2"
+  data-l10n-attrs="title, style"
+  persist="lastSelected"
+>
+  <dialog
+    id="ColorsDialog"
+    buttons="accept,cancel,help"
+    helpTopic="prefs-fonts-and-colors"
+  >
+    <linkset>
+      <html:link rel="stylesheet" href="chrome://global/skin/global.css" />
+      <html:link
+        rel="stylesheet"
+        href="chrome://browser/skin/preferences/preferences.css"
+      />
+
+      <html:link rel="localization" href="browser/preferences/colors.ftl" />
+    </linkset>
+
+    <script src="chrome://browser/content/utilityOverlay.js" />
+    <script src="chrome://global/content/preferencesBindings.js" />
+
+    <keyset>
+      <key
+        data-l10n-id="colors-close-key"
+        modifiers="accel"
+        oncommand="Preferences.close(event)"
+      />
+    </keyset>
+
+    <hbox>
+      <groupbox flex="1">
+        <label><html:h2 data-l10n-id="colors-text-and-background" /></label>
+        <hbox align="center">
+          <label
+            data-l10n-id="colors-text-header"
+            control="foregroundtextmenu"
+          />
+          <spacer flex="1" />
+          <html:input
+            type="color"
+            id="foregroundtextmenu"
+            preference="browser.display.foreground_color"
+          />
+        </hbox>
+        <hbox align="center" style="margin-top: 5px">
+          <label data-l10n-id="colors-background" control="backgroundmenu" />
+          <spacer flex="1" />
+          <html:input
+            type="color"
+            id="backgroundmenu"
+            preference="browser.display.background_color"
+          />
+        </hbox>
+        <separator class="thin" />
+        <hbox align="center">
+          <checkbox
+            id="browserUseSystemColors"
+            data-l10n-id="colors-use-system"
+            preference="browser.display.use_system_colors"
+          />
+        </hbox>
+      </groupbox>
+
+      <groupbox flex="1">
+        <label><html:h2 data-l10n-id="colors-links-header" /></label>
+        <hbox align="center">
+          <label
+            data-l10n-id="colors-unvisited-links"
+            control="unvisitedlinkmenu"
+          />
+          <spacer flex="1" />
+          <html:input
+            type="color"
+            id="unvisitedlinkmenu"
+            preference="browser.anchor_color"
+          />
+        </hbox>
+        <hbox align="center" style="margin-top: 5px">
+          <label
+            data-l10n-id="colors-visited-links"
+            control="visitedlinkmenu"
+          />
+          <spacer flex="1" />
+          <html:input
+            type="color"
+            id="visitedlinkmenu"
+            preference="browser.visited_color"
+          />
+        </hbox>
+      </groupbox>
+    </hbox>
+
+    <label data-l10n-id="colors-page-override" control="useDocumentColors" />
+    <hbox>
+      <menulist
+        id="useDocumentColors"
+        preference="browser.display.document_color_use"
+        flex="1"
+      >
+        <menupopup>
+          <menuitem
+            data-l10n-id="colors-page-override-option-always"
+            value="2"
+            id="documentColorAlways"
+          />
+          <menuitem
+            data-l10n-id="colors-page-override-option-auto"
+            value="0"
+            id="documentColorAutomatic"
+          />
+          <menuitem
+            data-l10n-id="colors-page-override-option-never"
+            value="1"
+            id="documentColorNever"
+          />
+        </menupopup>
+      </menulist>
+    </hbox>
+
+    <!-- Load the script after the elements for layout issues (bug 1501755). -->
+    <script src="chrome://browser/content/preferences/dialogs/colors.js" />
+  </dialog>
+</window>
diff --git a/browser/components/preferences/dialogs/connection.js b/browser/components/preferences/dialogs/connection.js
new file mode 100644
index 0000000000..0b21b1b5a5
--- /dev/null
+++ b/browser/components/preferences/dialogs/connection.js
@@ -0,0 +1,388 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 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/. */
+
+/* import-globals-from /browser/base/content/utilityOverlay.js */
+/* import-globals-from /toolkit/content/preferencesBindings.js */
+/* import-globals-from ../extensionControlled.js */
+
+document
+  .getElementById("ConnectionsDialog")
+  .addEventListener("dialoghelp", window.top.openPrefsHelp);
+
+Preferences.addAll([
+  // Add network.proxy.autoconfig_url before network.proxy.type so they're
+  // both initialized when network.proxy.type initialization triggers a call to
+  // gConnectionsDialog.updateReloadButton().
+  { id: "network.proxy.autoconfig_url", type: "string" },
+  { id: "network.proxy.type", type: "int" },
+  { id: "network.proxy.http", type: "string" },
+  { id: "network.proxy.http_port", type: "int" },
+  { id: "network.proxy.ssl", type: "string" },
+  { id: "network.proxy.ssl_port", type: "int" },
+  { id: "network.proxy.socks", type: "string" },
+  { id: "network.proxy.socks_port", type: "int" },
+  { id: "network.proxy.socks_version", type: "int" },
+  { id: "network.proxy.socks_remote_dns", type: "bool" },
+  { id: "network.proxy.no_proxies_on", type: "string" },
+  { id: "network.proxy.share_proxy_settings", type: "bool" },
+  { id: "signon.autologin.proxy", type: "bool" },
+  { id: "pref.advanced.proxies.disable_button.reload", type: "bool" },
+  { id: "network.proxy.backup.ssl", type: "string" },
+  { id: "network.proxy.backup.ssl_port", type: "int" },
+]);
+
+window.addEventListener(
+  "DOMContentLoaded",
+  () => {
+    Preferences.get("network.proxy.type").on(
+      "change",
+      gConnectionsDialog.proxyTypeChanged.bind(gConnectionsDialog)
+    );
+    Preferences.get("network.proxy.socks_version").on(
+      "change",
+      gConnectionsDialog.updateDNSPref.bind(gConnectionsDialog)
+    );
+
+    document
+      .getElementById("disableProxyExtension")
+      .addEventListener(
+        "command",
+        makeDisableControllingExtension(PREF_SETTING_TYPE, PROXY_KEY).bind(
+          gConnectionsDialog
+        )
+      );
+    gConnectionsDialog.updateProxySettingsUI();
+    initializeProxyUI(gConnectionsDialog);
+    gConnectionsDialog.registerSyncPrefListeners();
+    document
+      .getElementById("ConnectionsDialog")
+      .addEventListener("beforeaccept", e =>
+        gConnectionsDialog.beforeAccept(e)
+      );
+  },
+  { once: true, capture: true }
+);
+
+var gConnectionsDialog = {
+  beforeAccept(event) {
+    var proxyTypePref = Preferences.get("network.proxy.type");
+    if (proxyTypePref.value == 2) {
+      this.doAutoconfigURLFixup();
+      return;
+    }
+
+    if (proxyTypePref.value != 1) {
+      return;
+    }
+
+    var httpProxyURLPref = Preferences.get("network.proxy.http");
+    var httpProxyPortPref = Preferences.get("network.proxy.http_port");
+    var shareProxiesPref = Preferences.get(
+      "network.proxy.share_proxy_settings"
+    );
+
+    // If the proxy server (when specified) is invalid or the port is set to 0 then cancel submission.
+    for (let prefName of ["http", "ssl", "socks"]) {
+      let proxyPortPref = Preferences.get(
+        "network.proxy." + prefName + "_port"
+      );
+      let proxyPref = Preferences.get("network.proxy." + prefName);
+      // Only worry about ports which are currently active. If the share option is on, then ignore
+      // all ports except the HTTP and SOCKS port
+      if (
+        proxyPref.value != "" &&
+        (prefName == "http" || prefName == "socks" || !shareProxiesPref.value)
+      ) {
+        if (proxyPortPref.value == 0) {
+          document
+            .getElementById("networkProxy" + prefName.toUpperCase() + "_Port")
+            .focus();
+          event.preventDefault();
+          return;
+        } else if (!Services.io.isValidHostname(proxyPref.value)) {
+          document
+            .getElementById("networkProxy" + prefName.toUpperCase())
+            .focus();
+          event.preventDefault();
+          return;
+        }
+      }
+    }
+
+    // In the case of a shared proxy preference, backup the current values and update with the HTTP value
+    if (shareProxiesPref.value) {
+      var proxyServerURLPref = Preferences.get("network.proxy.ssl");
+      var proxyPortPref = Preferences.get("network.proxy.ssl_port");
+      var backupServerURLPref = Preferences.get("network.proxy.backup.ssl");
+      var backupPortPref = Preferences.get("network.proxy.backup.ssl_port");
+      backupServerURLPref.value =
+        backupServerURLPref.value || proxyServerURLPref.value;
+      backupPortPref.value = backupPortPref.value || proxyPortPref.value;
+      proxyServerURLPref.value = httpProxyURLPref.value;
+      proxyPortPref.value = httpProxyPortPref.value;
+    }
+
+    this.sanitizeNoProxiesPref();
+  },
+
+  checkForSystemProxy() {
+    if ("@mozilla.org/system-proxy-settings;1" in Cc) {
+      document.getElementById("systemPref").removeAttribute("hidden");
+    }
+  },
+
+  proxyTypeChanged() {
+    var proxyTypePref = Preferences.get("network.proxy.type");
+
+    // Update http
+    var httpProxyURLPref = Preferences.get("network.proxy.http");
+    httpProxyURLPref.updateControlDisabledState(proxyTypePref.value != 1);
+    var httpProxyPortPref = Preferences.get("network.proxy.http_port");
+    httpProxyPortPref.updateControlDisabledState(proxyTypePref.value != 1);
+
+    // Now update the other protocols
+    this.updateProtocolPrefs();
+
+    var shareProxiesPref = Preferences.get(
+      "network.proxy.share_proxy_settings"
+    );
+    shareProxiesPref.updateControlDisabledState(proxyTypePref.value != 1);
+    var autologinProxyPref = Preferences.get("signon.autologin.proxy");
+    autologinProxyPref.updateControlDisabledState(proxyTypePref.value == 0);
+    var noProxiesPref = Preferences.get("network.proxy.no_proxies_on");
+    noProxiesPref.updateControlDisabledState(proxyTypePref.value == 0);
+
+    var autoconfigURLPref = Preferences.get("network.proxy.autoconfig_url");
+    autoconfigURLPref.updateControlDisabledState(proxyTypePref.value != 2);
+
+    this.updateReloadButton();
+
+    document.getElementById("networkProxyNoneLocalhost").hidden =
+      Services.prefs.getBoolPref(
+        "network.proxy.allow_hijacking_localhost",
+        false
+      );
+  },
+
+  updateDNSPref() {
+    var socksVersionPref = Preferences.get("network.proxy.socks_version");
+    var socksDNSPref = Preferences.get("network.proxy.socks_remote_dns");
+    var proxyTypePref = Preferences.get("network.proxy.type");
+    var isDefinitelySocks4 =
+      proxyTypePref.value == 1 && socksVersionPref.value == 4;
+    socksDNSPref.updateControlDisabledState(
+      isDefinitelySocks4 || proxyTypePref.value == 0
+    );
+    return undefined;
+  },
+
+  updateReloadButton() {
+    // Disable the "Reload PAC" button if the selected proxy type is not PAC or
+    // if the current value of the PAC input does not match the value stored
+    // in prefs.  Likewise, disable the reload button if PAC is not configured
+    // in prefs.
+
+    var typedURL = document.getElementById("networkProxyAutoconfigURL").value;
+    var proxyTypeCur = Preferences.get("network.proxy.type").value;
+
+    var pacURL = Services.prefs.getCharPref("network.proxy.autoconfig_url");
+    var proxyType = Services.prefs.getIntPref("network.proxy.type");
+
+    var disableReloadPref = Preferences.get(
+      "pref.advanced.proxies.disable_button.reload"
+    );
+    disableReloadPref.updateControlDisabledState(
+      proxyTypeCur != 2 || proxyType != 2 || typedURL != pacURL
+    );
+  },
+
+  readProxyType() {
+    this.proxyTypeChanged();
+    return undefined;
+  },
+
+  updateProtocolPrefs() {
+    var proxyTypePref = Preferences.get("network.proxy.type");
+    var shareProxiesPref = Preferences.get(
+      "network.proxy.share_proxy_settings"
+    );
+    var proxyPrefs = ["ssl", "socks"];
+    for (var i = 0; i < proxyPrefs.length; ++i) {
+      var proxyServerURLPref = Preferences.get(
+        "network.proxy." + proxyPrefs[i]
+      );
+      var proxyPortPref = Preferences.get(
+        "network.proxy." + proxyPrefs[i] + "_port"
+      );
+
+      // Restore previous per-proxy custom settings, if present.
+      if (proxyPrefs[i] != "socks" && !shareProxiesPref.value) {
+        var backupServerURLPref = Preferences.get(
+          "network.proxy.backup." + proxyPrefs[i]
+        );
+        var backupPortPref = Preferences.get(
+          "network.proxy.backup." + proxyPrefs[i] + "_port"
+        );
+        if (backupServerURLPref.hasUserValue) {
+          proxyServerURLPref.value = backupServerURLPref.value;
+          backupServerURLPref.reset();
+        }
+        if (backupPortPref.hasUserValue) {
+          proxyPortPref.value = backupPortPref.value;
+          backupPortPref.reset();
+        }
+      }
+
+      proxyServerURLPref.updateElements();
+      proxyPortPref.updateElements();
+      let prefIsShared = proxyPrefs[i] != "socks" && shareProxiesPref.value;
+      proxyServerURLPref.updateControlDisabledState(
+        proxyTypePref.value != 1 || prefIsShared
+      );
+      proxyPortPref.updateControlDisabledState(
+        proxyTypePref.value != 1 || prefIsShared
+      );
+    }
+    var socksVersionPref = Preferences.get("network.proxy.socks_version");
+    socksVersionPref.updateControlDisabledState(proxyTypePref.value != 1);
+    this.updateDNSPref();
+    return undefined;
+  },
+
+  readProxyProtocolPref(aProtocol, aIsPort) {
+    if (aProtocol != "socks") {
+      var shareProxiesPref = Preferences.get(
+        "network.proxy.share_proxy_settings"
+      );
+      if (shareProxiesPref.value) {
+        var pref = Preferences.get(
+          "network.proxy.http" + (aIsPort ? "_port" : "")
+        );
+        return pref.value;
+      }
+
+      var backupPref = Preferences.get(
+        "network.proxy.backup." + aProtocol + (aIsPort ? "_port" : "")
+      );
+      return backupPref.hasUserValue ? backupPref.value : undefined;
+    }
+    return undefined;
+  },
+
+  reloadPAC() {
+    Cc["@mozilla.org/network/protocol-proxy-service;1"]
+      .getService()
+      .reloadPAC();
+  },
+
+  doAutoconfigURLFixup() {
+    var autoURL = document.getElementById("networkProxyAutoconfigURL");
+    var autoURLPref = Preferences.get("network.proxy.autoconfig_url");
+    try {
+      autoURLPref.value = autoURL.value = Services.uriFixup.getFixupURIInfo(
+        autoURL.value
+      ).preferredURI.spec;
+    } catch (ex) {}
+  },
+
+  sanitizeNoProxiesPref() {
+    var noProxiesPref = Preferences.get("network.proxy.no_proxies_on");
+    // replace substrings of ; and \n with commas if they're neither immediately
+    // preceded nor followed by a valid separator character
+    noProxiesPref.value = noProxiesPref.value.replace(
+      /([^, \n;])[;\n]+(?![,\n;])/g,
+      "$1,"
+    );
+    // replace any remaining ; and \n since some may follow commas, etc.
+    noProxiesPref.value = noProxiesPref.value.replace(/[;\n]/g, "");
+  },
+
+  readHTTPProxyServer() {
+    var shareProxiesPref = Preferences.get(
+      "network.proxy.share_proxy_settings"
+    );
+    if (shareProxiesPref.value) {
+      this.updateProtocolPrefs();
+    }
+    return undefined;
+  },
+
+  readHTTPProxyPort() {
+    var shareProxiesPref = Preferences.get(
+      "network.proxy.share_proxy_settings"
+    );
+    if (shareProxiesPref.value) {
+      this.updateProtocolPrefs();
+    }
+    return undefined;
+  },
+
+  getProxyControls() {
+    let controlGroup = document.getElementById("networkProxyType");
+    return [
+      ...controlGroup.querySelectorAll(":scope > radio"),
+      ...controlGroup.querySelectorAll("label"),
+      ...controlGroup.querySelectorAll("input"),
+      ...controlGroup.querySelectorAll("checkbox"),
+      ...document.querySelectorAll("#networkProxySOCKSVersion > radio"),
+      ...document.querySelectorAll("#ConnectionsDialogPane > checkbox"),
+    ];
+  },
+
+  // Update the UI to show/hide the extension controlled message for
+  // proxy settings.
+  async updateProxySettingsUI() {
+    let isLocked = API_PROXY_PREFS.some(pref =>
+      Services.prefs.prefIsLocked(pref)
+    );
+
+    function setInputsDisabledState(isControlled) {
+      for (let element of gConnectionsDialog.getProxyControls()) {
+        element.disabled = isControlled;
+      }
+      gConnectionsDialog.proxyTypeChanged();
+    }
+
+    if (isLocked) {
+      // An extension can't control this setting if any pref is locked.
+      hideControllingExtension(PROXY_KEY);
+    } else {
+      handleControllingExtension(PREF_SETTING_TYPE, PROXY_KEY).then(
+        setInputsDisabledState
+      );
+    }
+  },
+
+  registerSyncPrefListeners() {
+    function setSyncFromPrefListener(element_id, callback) {
+      Preferences.addSyncFromPrefListener(
+        document.getElementById(element_id),
+        callback
+      );
+    }
+    setSyncFromPrefListener("networkProxyType", () => this.readProxyType());
+    setSyncFromPrefListener("networkProxyHTTP", () =>
+      this.readHTTPProxyServer()
+    );
+    setSyncFromPrefListener("networkProxyHTTP_Port", () =>
+      this.readHTTPProxyPort()
+    );
+    setSyncFromPrefListener("shareAllProxies", () =>
+      this.updateProtocolPrefs()
+    );
+    setSyncFromPrefListener("networkProxySSL", () =>
+      this.readProxyProtocolPref("ssl", false)
+    );
+    setSyncFromPrefListener("networkProxySSL_Port", () =>
+      this.readProxyProtocolPref("ssl", true)
+    );
+    setSyncFromPrefListener("networkProxySOCKS", () =>
+      this.readProxyProtocolPref("socks", false)
+    );
+    setSyncFromPrefListener("networkProxySOCKS_Port", () =>
+      this.readProxyProtocolPref("socks", true)
+    );
+  },
+};
diff --git a/browser/components/preferences/dialogs/connection.xhtml b/browser/components/preferences/dialogs/connection.xhtml
new file mode 100644
index 0000000000..2a1a3c0115
--- /dev/null
+++ b/browser/components/preferences/dialogs/connection.xhtml
@@ -0,0 +1,247 @@
+<?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/. -->
+
+<window
+  type="child"
+  xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"
+  xmlns:html="http://www.w3.org/1999/xhtml"
+  data-l10n-id="connection-window2"
+  data-l10n-attrs="title, style"
+  persist="lastSelected"
+  onload="gConnectionsDialog.checkForSystemProxy();"
+>
+  <dialog
+    id="ConnectionsDialog"
+    buttons="accept,cancel,help"
+    helpTopic="prefs-connection-settings"
+  >
+    <!-- Used for extension-controlled lockdown message -->
+    <linkset>
+      <html:link rel="stylesheet" href="chrome://global/skin/global.css" />
+      <html:link
+        rel="stylesheet"
+        href="chrome://browser/skin/preferences/preferences.css"
+      />
+
+      <html:link rel="localization" href="browser/preferences/connection.ftl" />
+      <html:link
+        rel="localization"
+        href="browser/preferences/preferences.ftl"
+      />
+      <html:link rel="localization" href="branding/brand.ftl" />
+    </linkset>
+
+    <script src="chrome://browser/content/utilityOverlay.js" />
+    <script src="chrome://global/content/preferencesBindings.js" />
+    <script src="chrome://browser/content/preferences/extensionControlled.js" />
+
+    <keyset>
+      <key
+        data-l10n-id="connection-close-key"
+        modifiers="accel"
+        oncommand="Preferences.close(event)"
+      />
+    </keyset>
+
+    <script src="chrome://browser/content/preferences/dialogs/connection.js" />
+
+    <hbox
+      id="proxyExtensionContent"
+      align="start"
+      hidden="true"
+      class="extension-controlled"
+    >
+      <description control="disableProxyExtension" flex="1" />
+      <button
+        id="disableProxyExtension"
+        class="extension-controlled-button accessory-button"
+        data-l10n-id="connection-disable-extension"
+      />
+    </hbox>
+
+    <groupbox>
+      <label><html:h2 data-l10n-id="connection-proxy-configure" /></label>
+
+      <radiogroup id="networkProxyType" preference="network.proxy.type">
+        <radio value="0" data-l10n-id="connection-proxy-option-no" />
+        <radio value="4" data-l10n-id="connection-proxy-option-auto" />
+        <radio
+          value="5"
+          data-l10n-id="connection-proxy-option-system"
+          id="systemPref"
+          hidden="true"
+        />
+        <radio value="1" data-l10n-id="connection-proxy-option-manual" />
+        <box id="proxy-grid" class="indent" flex="1">
+          <html:div class="proxy-grid-row">
+            <hbox pack="end">
+              <label
+                data-l10n-id="connection-proxy-http"
+                control="networkProxyHTTP"
+              />
+            </hbox>
+            <hbox align="center">
+              <html:input
+                id="networkProxyHTTP"
+                type="text"
+                style="flex: 1"
+                preference="network.proxy.http"
+              />
+              <label
+                data-l10n-id="connection-proxy-http-port"
+                control="networkProxyHTTP_Port"
+              />
+              <html:input
+                id="networkProxyHTTP_Port"
+                class="proxy-port-input"
+                hidespinbuttons="true"
+                type="number"
+                min="0"
+                max="65535"
+                preference="network.proxy.http_port"
+              />
+            </hbox>
+          </html:div>
+          <html:div class="proxy-grid-row">
+            <hbox />
+            <hbox>
+              <checkbox
+                id="shareAllProxies"
+                data-l10n-id="connection-proxy-https-sharing"
+                preference="network.proxy.share_proxy_settings"
+              />
+            </hbox>
+          </html:div>
+          <html:div class="proxy-grid-row">
+            <hbox pack="end">
+              <label
+                data-l10n-id="connection-proxy-https"
+                control="networkProxySSL"
+              />
+            </hbox>
+            <hbox align="center">
+              <html:input
+                id="networkProxySSL"
+                type="text"
+                style="flex: 1"
+                preference="network.proxy.ssl"
+              />
+              <label
+                data-l10n-id="connection-proxy-ssl-port"
+                control="networkProxySSL_Port"
+              />
+              <html:input
+                id="networkProxySSL_Port"
+                class="proxy-port-input"
+                hidespinbuttons="true"
+                type="number"
+                min="0"
+                max="65535"
+                size="5"
+                preference="network.proxy.ssl_port"
+              />
+            </hbox>
+          </html:div>
+          <separator class="thin" />
+          <html:div class="proxy-grid-row">
+            <hbox pack="end">
+              <label
+                data-l10n-id="connection-proxy-socks"
+                control="networkProxySOCKS"
+              />
+            </hbox>
+            <hbox align="center">
+              <html:input
+                id="networkProxySOCKS"
+                type="text"
+                style="flex: 1"
+                preference="network.proxy.socks"
+              />
+              <label
+                data-l10n-id="connection-proxy-socks-port"
+                control="networkProxySOCKS_Port"
+              />
+              <html:input
+                id="networkProxySOCKS_Port"
+                class="proxy-port-input"
+                hidespinbuttons="true"
+                type="number"
+                min="0"
+                max="65535"
+                size="5"
+                preference="network.proxy.socks_port"
+              />
+            </hbox>
+          </html:div>
+          <html:div class="proxy-grid-row">
+            <spacer />
+            <box pack="start">
+              <radiogroup
+                id="networkProxySOCKSVersion"
+                orient="horizontal"
+                preference="network.proxy.socks_version"
+              >
+                <radio
+                  id="networkProxySOCKSVersion4"
+                  value="4"
+                  data-l10n-id="connection-proxy-socks4"
+                />
+                <radio
+                  id="networkProxySOCKSVersion5"
+                  value="5"
+                  data-l10n-id="connection-proxy-socks5"
+                />
+              </radiogroup>
+            </box>
+          </html:div>
+        </box>
+        <radio value="2" data-l10n-id="connection-proxy-autotype" />
+        <hbox class="indent" flex="1" align="center">
+          <html:input
+            id="networkProxyAutoconfigURL"
+            type="text"
+            style="flex: 1"
+            preference="network.proxy.autoconfig_url"
+            oninput="gConnectionsDialog.updateReloadButton();"
+          />
+          <button
+            id="autoReload"
+            data-l10n-id="connection-proxy-reload"
+            oncommand="gConnectionsDialog.reloadPAC();"
+            preference="pref.advanced.proxies.disable_button.reload"
+          />
+        </hbox>
+      </radiogroup>
+    </groupbox>
+    <separator class="thin" />
+    <label data-l10n-id="connection-proxy-noproxy" control="networkProxyNone" />
+    <html:textarea
+      id="networkProxyNone"
+      preference="network.proxy.no_proxies_on"
+      rows="2"
+    />
+    <label
+      control="networkProxyNone"
+      data-l10n-id="connection-proxy-noproxy-desc"
+    />
+    <label
+      id="networkProxyNoneLocalhost"
+      control="networkProxyNone"
+      data-l10n-id="connection-proxy-noproxy-localhost-desc-2"
+    />
+    <separator class="thin" />
+    <checkbox
+      id="autologinProxy"
+      data-l10n-id="connection-proxy-autologin-checkbox"
+      preference="signon.autologin.proxy"
+    />
+    <checkbox
+      id="networkProxySOCKSRemoteDNS"
+      preference="network.proxy.socks_remote_dns"
+      data-l10n-id="connection-proxy-socks-remote-dns"
+    />
+  </dialog>
+</window>
diff --git a/browser/components/preferences/dialogs/containers.js b/browser/components/preferences/dialogs/containers.js
new file mode 100644
index 0000000000..14526545b6
--- /dev/null
+++ b/browser/components/preferences/dialogs/containers.js
@@ -0,0 +1,167 @@
+/* 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/. */
+
+const { ContextualIdentityService } = ChromeUtils.importESModule(
+  "resource://gre/modules/ContextualIdentityService.sys.mjs"
+);
+
+/**
+ * We want to set the window title immediately to prevent flickers.
+ */
+function setTitle() {
+  let params = window.arguments[0] || {};
+
+  let winElem = document.documentElement;
+  if (params.userContextId) {
+    document.l10n.setAttributes(winElem, "containers-window-update-settings2", {
+      name: params.identity.name,
+    });
+  } else {
+    document.l10n.setAttributes(winElem, "containers-window-new2");
+  }
+}
+setTitle();
+
+let gContainersManager = {
+  icons: [
+    "fingerprint",
+    "briefcase",
+    "dollar",
+    "cart",
+    "vacation",
+    "gift",
+    "food",
+    "fruit",
+    "pet",
+    "tree",
+    "chill",
+    "circle",
+    "fence",
+  ],
+
+  colors: [
+    "blue",
+    "turquoise",
+    "green",
+    "yellow",
+    "orange",
+    "red",
+    "pink",
+    "purple",
+    "toolbar",
+  ],
+
+  onLoad() {
+    let params = window.arguments[0] || {};
+    this.init(params);
+  },
+
+  init(aParams) {
+    this._dialog = document.querySelector("dialog");
+    this.userContextId = aParams.userContextId || null;
+    this.identity = aParams.identity;
+
+    const iconWrapper = document.getElementById("iconWrapper");
+    iconWrapper.appendChild(this.createIconButtons());
+
+    const colorWrapper = document.getElementById("colorWrapper");
+    colorWrapper.appendChild(this.createColorSwatches());
+
+    if (this.identity.name) {
+      const name = document.getElementById("name");
+      name.value = this.identity.name;
+      this.checkForm();
+    }
+
+    document.addEventListener("dialogaccept", () => this.onApplyChanges());
+
+    // This is to prevent layout jank caused by the svgs and outlines rendering at different times
+    document.getElementById("containers-content").removeAttribute("hidden");
+  },
+
+  uninit() {},
+
+  // Check if name is provided to determine if the form can be submitted
+  checkForm() {
+    const name = document.getElementById("name");
+    this._dialog.setAttribute("buttondisabledaccept", !name.value.trim());
+  },
+
+  createIconButtons(defaultIcon) {
+    let radiogroup = document.createXULElement("radiogroup");
+    radiogroup.setAttribute("id", "icon");
+    radiogroup.className = "icon-buttons radio-buttons";
+
+    for (let icon of this.icons) {
+      let iconSwatch = document.createXULElement("radio");
+      iconSwatch.id = "iconbutton-" + icon;
+      iconSwatch.name = "icon";
+      iconSwatch.type = "radio";
+      iconSwatch.value = icon;
+
+      if (this.identity.icon && this.identity.icon == icon) {
+        iconSwatch.setAttribute("selected", true);
+      }
+
+      document.l10n.setAttributes(iconSwatch, `containers-icon-${icon}`);
+      let iconElement = document.createXULElement("hbox");
+      iconElement.className = "userContext-icon";
+      iconElement.classList.add("identity-icon-" + icon);
+
+      iconSwatch.appendChild(iconElement);
+      radiogroup.appendChild(iconSwatch);
+    }
+
+    return radiogroup;
+  },
+
+  createColorSwatches(defaultColor) {
+    let radiogroup = document.createXULElement("radiogroup");
+    radiogroup.setAttribute("id", "color");
+    radiogroup.className = "radio-buttons";
+
+    for (let color of this.colors) {
+      let colorSwatch = document.createXULElement("radio");
+      colorSwatch.id = "colorswatch-" + color;
+      colorSwatch.name = "color";
+      colorSwatch.type = "radio";
+      colorSwatch.value = color;
+
+      if (this.identity.color && this.identity.color == color) {
+        colorSwatch.setAttribute("selected", true);
+      }
+
+      document.l10n.setAttributes(colorSwatch, `containers-color-${color}`);
+      let iconElement = document.createXULElement("hbox");
+      iconElement.className = "userContext-icon";
+      iconElement.classList.add("identity-icon-circle");
+      iconElement.classList.add("identity-color-" + color);
+
+      colorSwatch.appendChild(iconElement);
+      radiogroup.appendChild(colorSwatch);
+    }
+    return radiogroup;
+  },
+
+  onApplyChanges() {
+    let icon = document.getElementById("icon").value;
+    let color = document.getElementById("color").value;
+    let name = document.getElementById("name").value;
+
+    if (!this.icons.includes(icon)) {
+      throw new Error("Internal error. The icon value doesn't match.");
+    }
+
+    if (!this.colors.includes(color)) {
+      throw new Error("Internal error. The color value doesn't match.");
+    }
+
+    if (this.userContextId) {
+      ContextualIdentityService.update(this.userContextId, name, icon, color);
+    } else {
+      ContextualIdentityService.create(name, icon, color);
+    }
+    window.parent.location.reload();
+  },
+};
diff --git a/browser/components/preferences/dialogs/containers.xhtml b/browser/components/preferences/dialogs/containers.xhtml
new file mode 100644
index 0000000000..867463ee3a
--- /dev/null
+++ b/browser/components/preferences/dialogs/containers.xhtml
@@ -0,0 +1,75 @@
+<?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/. -->
+
+<window
+  id="ContainersDialog"
+  xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"
+  xmlns:html="http://www.w3.org/1999/xhtml"
+  data-l10n-attrs="title, style"
+  onload="gContainersManager.onLoad();"
+  onunload="gContainersManager.uninit();"
+  persist="width height"
+>
+  <dialog
+    buttons="accept"
+    buttondisabledaccept="true"
+    data-l10n-id="containers-dialog"
+    data-l10n-attrs="buttonlabelaccept, buttonaccesskeyaccept"
+  >
+    <linkset>
+      <html:link rel="stylesheet" href="chrome://global/skin/global.css" />
+      <html:link
+        rel="stylesheet"
+        href="chrome://browser/skin/preferences/containers-dialog.css"
+      />
+
+      <html:link rel="localization" href="browser/preferences/containers.ftl" />
+    </linkset>
+
+    <script src="chrome://browser/content/preferences/dialogs/containers.js" />
+
+    <keyset>
+      <key
+        data-l10n-id="containers-window-close"
+        modifiers="accel"
+        oncommand="window.close();"
+      />
+    </keyset>
+
+    <vbox class="contentPane" hidden="true" id="containers-content">
+      <hbox align="start">
+        <label
+          id="nameLabel"
+          control="name"
+          data-l10n-id="containers-name-label"
+          data-l10n-attrs="style"
+        />
+        <html:input
+          id="name"
+          type="text"
+          data-l10n-id="containers-name-text"
+          oninput="gContainersManager.checkForm();"
+        />
+      </hbox>
+      <hbox align="center" id="colorWrapper">
+        <label
+          id="colorLabel"
+          control="color"
+          data-l10n-id="containers-color-label"
+          data-l10n-attrs="style"
+        />
+      </hbox>
+      <hbox align="center" id="iconWrapper">
+        <label
+          id="iconLabel"
+          control="icon"
+          data-l10n-id="containers-icon-label"
+          data-l10n-attrs="style"
+        />
+      </hbox>
+    </vbox>
+  </dialog>
+</window>
diff --git a/browser/components/preferences/dialogs/dohExceptions.js b/browser/components/preferences/dialogs/dohExceptions.js
new file mode 100644
index 0000000000..f4c1d4d80d
--- /dev/null
+++ b/browser/components/preferences/dialogs/dohExceptions.js
@@ -0,0 +1,287 @@
+/* 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/. */
+
+const { AppConstants } = ChromeUtils.importESModule(
+  "resource://gre/modules/AppConstants.sys.mjs"
+);
+
+var gDoHExceptionsManager = {
+  _exceptions: new Set(),
+  _list: null,
+  _prefLocked: false,
+
+  init() {
+    document.addEventListener("dialogaccept", () => this.onApplyChanges());
+
+    this._btnAddException = document.getElementById("btnAddException");
+    this._removeButton = document.getElementById("removeException");
+    this._removeAllButton = document.getElementById("removeAllExceptions");
+    this._list = document.getElementById("permissionsBox");
+
+    this._urlField = document.getElementById("url");
+    this.onExceptionInput();
+
+    this._loadExceptions();
+    this.buildExceptionList();
+
+    this._urlField.focus();
+
+    this._prefLocked = Services.prefs.prefIsLocked(
+      "network.trr.excluded-domains"
+    );
+
+    this._btnAddException.disabled = this._prefLocked;
+    document.getElementById("exceptionDialog").getButton("accept").disabled =
+      this._prefLocked;
+    this._urlField.disabled = this._prefLocked;
+  },
+
+  _loadExceptions() {
+    let exceptionsFromPref = Services.prefs.getStringPref(
+      "network.trr.excluded-domains"
+    );
+
+    if (!exceptionsFromPref?.trim()) {
+      return;
+    }
+
+    let exceptions = exceptionsFromPref.trim().split(",");
+    for (let exception of exceptions) {
+      let trimmed = exception.trim();
+      if (trimmed) {
+        this._exceptions.add(trimmed);
+      }
+    }
+  },
+
+  addException() {
+    if (this._prefLocked) {
+      return;
+    }
+
+    let textbox = document.getElementById("url");
+    let inputValue = textbox.value.trim(); // trim any leading and trailing space
+    if (!inputValue.startsWith("http:") && !inputValue.startsWith("https:")) {
+      inputValue = `http://${inputValue}`;
+    }
+    let domain = "";
+    try {
+      let uri = Services.io.newURI(inputValue);
+      domain = uri.host;
+    } catch (ex) {
+      document.l10n
+        .formatValues([
+          { id: "permissions-invalid-uri-title" },
+          { id: "permissions-invalid-uri-label" },
+        ])
+        .then(([title, message]) => {
+          Services.prompt.alert(window, title, message);
+        });
+      return;
+    }
+
+    if (!this._exceptions.has(domain)) {
+      this._exceptions.add(domain);
+      this.buildExceptionList();
+    }
+
+    textbox.value = "";
+    textbox.focus();
+
+    // covers a case where the site exists already, so the buttons don't disable
+    this.onExceptionInput();
+
+    // enable "remove all" button as needed
+    this._setRemoveButtonState();
+  },
+
+  onExceptionInput() {
+    this._btnAddException.disabled = !this._urlField.value;
+  },
+
+  onExceptionKeyPress(event) {
+    if (event.keyCode == KeyEvent.DOM_VK_RETURN) {
+      this._btnAddException.click();
+      if (document.activeElement == this._urlField) {
+        event.preventDefault();
+      }
+    }
+  },
+
+  onListBoxKeyPress(event) {
+    if (!this._list.selectedItem) {
+      return;
+    }
+
+    if (this._prefLocked) {
+      return;
+    }
+
+    if (
+      event.keyCode == KeyEvent.DOM_VK_DELETE ||
+      (AppConstants.platform == "macosx" &&
+        event.keyCode == KeyEvent.DOM_VK_BACK_SPACE)
+    ) {
+      this.onExceptionDelete();
+      event.preventDefault();
+    }
+  },
+
+  onListBoxSelect() {
+    this._setRemoveButtonState();
+  },
+
+  _removeExceptionFromList(exception) {
+    this._exceptions.delete(exception);
+    let exceptionlistitem = document.getElementsByAttribute(
+      "domain",
+      exception
+    )[0];
+    if (exceptionlistitem) {
+      exceptionlistitem.remove();
+    }
+  },
+
+  onExceptionDelete() {
+    let richlistitem = this._list.selectedItem;
+    let exception = richlistitem.getAttribute("domain");
+
+    this._removeExceptionFromList(exception);
+
+    this._setRemoveButtonState();
+  },
+
+  onAllExceptionsDelete() {
+    for (let exception of this._exceptions.values()) {
+      this._removeExceptionFromList(exception);
+    }
+
+    this._setRemoveButtonState();
+  },
+
+  _createExceptionListItem(exception) {
+    let richlistitem = document.createXULElement("richlistitem");
+    richlistitem.setAttribute("domain", exception);
+    let row = document.createXULElement("hbox");
+    row.setAttribute("style", "flex: 1");
+
+    let hbox = document.createXULElement("hbox");
+    let website = document.createXULElement("label");
+    website.setAttribute("class", "website-name-value");
+    website.setAttribute("value", exception);
+    hbox.setAttribute("class", "website-name");
+    hbox.setAttribute("style", "flex: 3 3; width: 0");
+    hbox.appendChild(website);
+    row.appendChild(hbox);
+
+    richlistitem.appendChild(row);
+    return richlistitem;
+  },
+
+  _sortExceptions(list, frag, column) {
+    let sortDirection;
+
+    if (!column) {
+      column = document.querySelector("treecol[data-isCurrentSortCol=true]");
+      sortDirection =
+        column.getAttribute("data-last-sortDirection") || "ascending";
+    } else {
+      sortDirection = column.getAttribute("data-last-sortDirection");
+      sortDirection =
+        sortDirection === "ascending" ? "descending" : "ascending";
+    }
+
+    let sortFunc = (a, b) => {
+      return comp.compare(a.getAttribute("domain"), b.getAttribute("domain"));
+    };
+
+    let comp = new Services.intl.Collator(undefined, {
+      usage: "sort",
+    });
+
+    let items = Array.from(frag.querySelectorAll("richlistitem"));
+
+    if (sortDirection === "descending") {
+      items.sort((a, b) => sortFunc(b, a));
+    } else {
+      items.sort(sortFunc);
+    }
+
+    // Re-append items in the correct order:
+    items.forEach(item => frag.appendChild(item));
+
+    let cols = list.previousElementSibling.querySelectorAll("treecol");
+    cols.forEach(c => {
+      c.removeAttribute("data-isCurrentSortCol");
+      c.removeAttribute("sortDirection");
+    });
+    column.setAttribute("data-isCurrentSortCol", "true");
+    column.setAttribute("sortDirection", sortDirection);
+    column.setAttribute("data-last-sortDirection", sortDirection);
+  },
+
+  _setRemoveButtonState() {
+    if (!this._list) {
+      return;
+    }
+
+    if (this._prefLocked) {
+      this._removeAllButton.disabled = true;
+      this._removeButton.disabled = true;
+      return;
+    }
+
+    let hasSelection = this._list.selectedIndex >= 0;
+
+    this._removeButton.disabled = !hasSelection;
+    let disabledItems = this._list.querySelectorAll(
+      "label.website-name-value[disabled='true']"
+    );
+
+    this._removeAllButton.disabled =
+      this._list.itemCount == disabledItems.length;
+  },
+
+  onApplyChanges() {
+    if (this._exceptions.size == 0) {
+      Services.prefs.setStringPref("network.trr.excluded-domains", "");
+      return;
+    }
+
+    let exceptions = Array.from(this._exceptions);
+    let exceptionPrefString = exceptions.join(",");
+
+    Services.prefs.setStringPref(
+      "network.trr.excluded-domains",
+      exceptionPrefString
+    );
+  },
+
+  buildExceptionList(sortCol) {
+    // Clear old entries.
+    let oldItems = this._list.querySelectorAll("richlistitem");
+    for (let item of oldItems) {
+      item.remove();
+    }
+    let frag = document.createDocumentFragment();
+
+    let exceptions = Array.from(this._exceptions.values());
+
+    for (let exception of exceptions) {
+      let richlistitem = this._createExceptionListItem(exception);
+      frag.appendChild(richlistitem);
+    }
+
+    // Sort exceptions.
+    this._sortExceptions(this._list, frag, sortCol);
+
+    this._list.appendChild(frag);
+
+    this._setRemoveButtonState();
+  },
+};
+
+document.addEventListener("DOMContentLoaded", () => {
+  gDoHExceptionsManager.init();
+});
diff --git a/browser/components/preferences/dialogs/dohExceptions.xhtml b/browser/components/preferences/dialogs/dohExceptions.xhtml
new file mode 100644
index 0000000000..03a9c87992
--- /dev/null
+++ b/browser/components/preferences/dialogs/dohExceptions.xhtml
@@ -0,0 +1,110 @@
+<?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/. -->
+
+<window
+  id="DoHExceptionsDialog"
+  xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"
+  xmlns:html="http://www.w3.org/1999/xhtml"
+  data-l10n-id="permissions-exceptions-doh-window"
+  data-l10n-attrs="title, style"
+  persist="width height"
+>
+  <dialog
+    id="exceptionDialog"
+    buttons="accept,cancel"
+    data-l10n-id="permission-dialog"
+    data-l10n-attrs="buttonlabelaccept, buttonaccesskeyaccept"
+  >
+    <linkset>
+      <html:link rel="stylesheet" href="chrome://global/skin/global.css" />
+      <html:link
+        rel="stylesheet"
+        href="chrome://browser/content/preferences/dialogs/sitePermissions.css"
+      />
+      <html:link
+        rel="stylesheet"
+        href="chrome://browser/skin/preferences/preferences.css"
+      />
+
+      <html:link rel="localization" href="branding/brand.ftl" />
+      <html:link
+        rel="localization"
+        href="browser/preferences/permissions.ftl"
+      />
+    </linkset>
+
+    <script src="chrome://browser/content/preferences/dialogs/dohExceptions.js" />
+
+    <keyset>
+      <key
+        data-l10n-id="permissions-close-key"
+        modifiers="accel"
+        oncommand="window.close();"
+      />
+    </keyset>
+
+    <vbox class="contentPane">
+      <description
+        id="dohExceptionText"
+        control="url"
+        data-l10n-id="permissions-exceptions-manage-doh-desc"
+      />
+      <separator class="thin" />
+      <label
+        id="urlLabel"
+        control="url"
+        data-l10n-id="permissions-doh-entry-field"
+      />
+      <hbox align="start">
+        <html:input
+          id="url"
+          type="text"
+          style="flex: 1"
+          oninput="gDoHExceptionsManager.onExceptionInput();"
+          onkeypress="gDoHExceptionsManager.onExceptionKeyPress(event);"
+        />
+      </hbox>
+      <hbox pack="end">
+        <button
+          id="btnAddException"
+          disabled="true"
+          data-l10n-id="permissions-doh-add-exception"
+          oncommand="gDoHExceptionsManager.addException();"
+        />
+      </hbox>
+      <separator class="thin" />
+      <listheader>
+        <treecol
+          id="siteCol"
+          data-l10n-id="permissions-doh-col"
+          style="flex: 3 3 auto; width: 0"
+          data-isCurrentSortCol="true"
+          onclick="gDoHExceptionsManager.buildExceptionList(event.target)"
+        />
+      </listheader>
+      <richlistbox
+        id="permissionsBox"
+        selected="false"
+        onkeypress="gDoHExceptionsManager.onListBoxKeyPress(event);"
+        onselect="gDoHExceptionsManager.onListBoxSelect();"
+      />
+    </vbox>
+
+    <hbox class="actionButtons">
+      <button
+        id="removeException"
+        disabled="true"
+        data-l10n-id="permissions-doh-remove"
+        oncommand="gDoHExceptionsManager.onExceptionDelete();"
+      />
+      <button
+        id="removeAllExceptions"
+        data-l10n-id="permissions-doh-remove-all"
+        oncommand="gDoHExceptionsManager.onAllExceptionsDelete();"
+      />
+    </hbox>
+  </dialog>
+</window>
diff --git a/browser/components/preferences/dialogs/fonts.js b/browser/components/preferences/dialogs/fonts.js
new file mode 100644
index 0000000000..ccc2f8faca
--- /dev/null
+++ b/browser/components/preferences/dialogs/fonts.js
@@ -0,0 +1,173 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 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/. */
+
+/* import-globals-from /browser/base/content/utilityOverlay.js */
+/* import-globals-from /toolkit/mozapps/preferences/fontbuilder.js */
+
+// browser.display.languageList LOCK ALL when LOCKED
+
+const kDefaultFontType = "font.default.%LANG%";
+const kFontNameFmtSerif = "font.name.serif.%LANG%";
+const kFontNameFmtSansSerif = "font.name.sans-serif.%LANG%";
+const kFontNameFmtMonospace = "font.name.monospace.%LANG%";
+const kFontNameListFmtSerif = "font.name-list.serif.%LANG%";
+const kFontNameListFmtSansSerif = "font.name-list.sans-serif.%LANG%";
+const kFontNameListFmtMonospace = "font.name-list.monospace.%LANG%";
+const kFontSizeFmtVariable = "font.size.variable.%LANG%";
+const kFontSizeFmtFixed = "font.size.monospace.%LANG%";
+const kFontMinSizeFmt = "font.minimum-size.%LANG%";
+
+document
+  .getElementById("FontsDialog")
+  .addEventListener("dialoghelp", window.top.openPrefsHelp);
+window.addEventListener("load", () => gFontsDialog.onLoad());
+
+Preferences.addAll([
+  { id: "font.language.group", type: "wstring" },
+  { id: "browser.display.use_document_fonts", type: "int" },
+]);
+
+var gFontsDialog = {
+  _selectLanguageGroupPromise: Promise.resolve(),
+
+  onLoad() {
+    Preferences.addSyncFromPrefListener(
+      document.getElementById("selectLangs"),
+      () => this.readFontLanguageGroup()
+    );
+    Preferences.addSyncFromPrefListener(
+      document.getElementById("useDocumentFonts"),
+      () => this.readUseDocumentFonts()
+    );
+    Preferences.addSyncToPrefListener(
+      document.getElementById("useDocumentFonts"),
+      () => this.writeUseDocumentFonts()
+    );
+    for (let id of ["serif", "sans-serif", "monospace"]) {
+      let el = document.getElementById(id);
+      Preferences.addSyncFromPrefListener(el, () =>
+        FontBuilder.readFontSelection(el)
+      );
+    }
+  },
+
+  _selectLanguageGroup(aLanguageGroup) {
+    this._selectLanguageGroupPromise = (async () => {
+      // Avoid overlapping language group selections by awaiting the resolution
+      // of the previous one.  We do this because this function is re-entrant,
+      // as inserting <preference> elements into the DOM sometimes triggers a call
+      // back into this function.  And since this function is also asynchronous,
+      // that call can enter this function before the previous run has completed,
+      // which would corrupt the font menulists.  Awaiting the previous call's
+      // resolution avoids that fate.
+      await this._selectLanguageGroupPromise;
+
+      var prefs = [
+        {
+          format: kDefaultFontType,
+          type: "string",
+          element: "defaultFontType",
+          fonttype: null,
+        },
+        {
+          format: kFontNameFmtSerif,
+          type: "fontname",
+          element: "serif",
+          fonttype: "serif",
+        },
+        {
+          format: kFontNameFmtSansSerif,
+          type: "fontname",
+          element: "sans-serif",
+          fonttype: "sans-serif",
+        },
+        {
+          format: kFontNameFmtMonospace,
+          type: "fontname",
+          element: "monospace",
+          fonttype: "monospace",
+        },
+        {
+          format: kFontNameListFmtSerif,
+          type: "unichar",
+          element: null,
+          fonttype: "serif",
+        },
+        {
+          format: kFontNameListFmtSansSerif,
+          type: "unichar",
+          element: null,
+          fonttype: "sans-serif",
+        },
+        {
+          format: kFontNameListFmtMonospace,
+          type: "unichar",
+          element: null,
+          fonttype: "monospace",
+        },
+        {
+          format: kFontSizeFmtVariable,
+          type: "int",
+          element: "sizeVar",
+          fonttype: null,
+        },
+        {
+          format: kFontSizeFmtFixed,
+          type: "int",
+          element: "sizeMono",
+          fonttype: null,
+        },
+        {
+          format: kFontMinSizeFmt,
+          type: "int",
+          element: "minSize",
+          fonttype: null,
+        },
+      ];
+      for (var i = 0; i < prefs.length; ++i) {
+        var name = prefs[i].format.replace(/%LANG%/, aLanguageGroup);
+        var preference = Preferences.get(name);
+        if (!preference) {
+          preference = Preferences.add({ id: name, type: prefs[i].type });
+        }
+
+        if (!prefs[i].element) {
+          continue;
+        }
+
+        var element = document.getElementById(prefs[i].element);
+        if (element) {
+          element.setAttribute("preference", preference.id);
+
+          if (prefs[i].fonttype) {
+            await FontBuilder.buildFontList(
+              aLanguageGroup,
+              prefs[i].fonttype,
+              element
+            );
+          }
+
+          preference.setElementValue(element);
+        }
+      }
+    })().catch(console.error);
+  },
+
+  readFontLanguageGroup() {
+    var languagePref = Preferences.get("font.language.group");
+    this._selectLanguageGroup(languagePref.value);
+    return undefined;
+  },
+
+  readUseDocumentFonts() {
+    var preference = Preferences.get("browser.display.use_document_fonts");
+    return preference.value == 1;
+  },
+
+  writeUseDocumentFonts() {
+    var useDocumentFonts = document.getElementById("useDocumentFonts");
+    return useDocumentFonts.checked ? 1 : 0;
+  },
+};
diff --git a/browser/components/preferences/dialogs/fonts.xhtml b/browser/components/preferences/dialogs/fonts.xhtml
new file mode 100644
index 0000000000..44dc473ccb
--- /dev/null
+++ b/browser/components/preferences/dialogs/fonts.xhtml
@@ -0,0 +1,254 @@
+<?xml version="1.0"?>
+
+<!-- -*- 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/. -->
+
+<window
+  type="child"
+  xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"
+  xmlns:html="http://www.w3.org/1999/xhtml"
+  data-l10n-id="fonts-window"
+  data-l10n-attrs="title"
+  persist="lastSelected"
+>
+  <dialog
+    id="FontsDialog"
+    buttons="accept,cancel,help"
+    helpTopic="prefs-fonts-and-colors"
+  >
+    <linkset>
+      <html:link rel="stylesheet" href="chrome://global/skin/global.css" />
+      <html:link
+        rel="stylesheet"
+        href="chrome://browser/skin/preferences/preferences.css"
+      />
+
+      <html:link rel="localization" href="browser/preferences/fonts.ftl" />
+    </linkset>
+
+    <script src="chrome://browser/content/utilityOverlay.js" />
+    <script src="chrome://global/content/preferencesBindings.js" />
+
+    <keyset>
+      <key
+        data-l10n-id="fonts-window-close"
+        modifiers="accel"
+        oncommand="Preferences.close(event)"
+      />
+    </keyset>
+
+    <!-- Fonts for: [ Language ] -->
+    <groupbox>
+      <hbox align="center">
+        <label control="selectLangs"
+          ><html:h2 data-l10n-id="fonts-langgroup-header"
+        /></label>
+      </hbox>
+      <menulist id="selectLangs" preference="font.language.group">
+        <menupopup>
+          <menuitem value="ar" data-l10n-id="fonts-langgroup-arabic" />
+          <menuitem value="x-armn" data-l10n-id="fonts-langgroup-armenian" />
+          <menuitem value="x-beng" data-l10n-id="fonts-langgroup-bengali" />
+          <menuitem
+            value="zh-CN"
+            data-l10n-id="fonts-langgroup-simpl-chinese"
+          />
+          <menuitem
+            value="zh-HK"
+            data-l10n-id="fonts-langgroup-trad-chinese-hk"
+          />
+          <menuitem value="zh-TW" data-l10n-id="fonts-langgroup-trad-chinese" />
+          <menuitem
+            value="x-cyrillic"
+            data-l10n-id="fonts-langgroup-cyrillic"
+          />
+          <menuitem
+            value="x-devanagari"
+            data-l10n-id="fonts-langgroup-devanagari"
+          />
+          <menuitem value="x-ethi" data-l10n-id="fonts-langgroup-ethiopic" />
+          <menuitem value="x-geor" data-l10n-id="fonts-langgroup-georgian" />
+          <menuitem value="el" data-l10n-id="fonts-langgroup-el" />
+          <menuitem value="x-gujr" data-l10n-id="fonts-langgroup-gujarati" />
+          <menuitem value="x-guru" data-l10n-id="fonts-langgroup-gurmukhi" />
+          <menuitem value="he" data-l10n-id="fonts-langgroup-hebrew" />
+          <menuitem value="ja" data-l10n-id="fonts-langgroup-japanese" />
+          <menuitem value="x-knda" data-l10n-id="fonts-langgroup-kannada" />
+          <menuitem value="x-khmr" data-l10n-id="fonts-langgroup-khmer" />
+          <menuitem value="ko" data-l10n-id="fonts-langgroup-korean" />
+          <menuitem value="x-western" data-l10n-id="fonts-langgroup-latin" />
+          <menuitem value="x-mlym" data-l10n-id="fonts-langgroup-malayalam" />
+          <menuitem value="x-math" data-l10n-id="fonts-langgroup-math" />
+          <menuitem value="x-orya" data-l10n-id="fonts-langgroup-odia" />
+          <menuitem value="x-sinh" data-l10n-id="fonts-langgroup-sinhala" />
+          <menuitem value="x-tamil" data-l10n-id="fonts-langgroup-tamil" />
+          <menuitem value="x-telu" data-l10n-id="fonts-langgroup-telugu" />
+          <menuitem value="th" data-l10n-id="fonts-langgroup-thai" />
+          <menuitem value="x-tibt" data-l10n-id="fonts-langgroup-tibetan" />
+          <menuitem value="x-cans" data-l10n-id="fonts-langgroup-canadian" />
+          <menuitem value="x-unicode" data-l10n-id="fonts-langgroup-other" />
+        </menupopup>
+      </menulist>
+
+      <separator class="thin" />
+
+      <box id="font-chooser-group">
+        <!-- proportional row -->
+        <hbox align="center" pack="end">
+          <label
+            data-l10n-id="fonts-proportional-header"
+            control="defaultFontType"
+          />
+        </hbox>
+        <menulist id="defaultFontType">
+          <menupopup>
+            <menuitem value="serif" data-l10n-id="fonts-default-serif" />
+            <menuitem
+              value="sans-serif"
+              data-l10n-id="fonts-default-sans-serif"
+            />
+          </menupopup>
+        </menulist>
+        <hbox align="center" pack="end">
+          <label data-l10n-id="fonts-proportional-size" control="sizeVar" />
+        </hbox>
+        <menulist id="sizeVar" delayprefsave="true">
+          <menupopup>
+            <menuitem value="9" label="9" />
+            <menuitem value="10" label="10" />
+            <menuitem value="11" label="11" />
+            <menuitem value="12" label="12" />
+            <menuitem value="13" label="13" />
+            <menuitem value="14" label="14" />
+            <menuitem value="15" label="15" />
+            <menuitem value="16" label="16" />
+            <menuitem value="17" label="17" />
+            <menuitem value="18" label="18" />
+            <menuitem value="20" label="20" />
+            <menuitem value="22" label="22" />
+            <menuitem value="24" label="24" />
+            <menuitem value="26" label="26" />
+            <menuitem value="28" label="28" />
+            <menuitem value="30" label="30" />
+            <menuitem value="32" label="32" />
+            <menuitem value="34" label="34" />
+            <menuitem value="36" label="36" />
+            <menuitem value="40" label="40" />
+            <menuitem value="44" label="44" />
+            <menuitem value="48" label="48" />
+            <menuitem value="56" label="56" />
+            <menuitem value="64" label="64" />
+            <menuitem value="72" label="72" />
+          </menupopup>
+        </menulist>
+
+        <!-- serif row -->
+        <hbox align="center" pack="end">
+          <label data-l10n-id="fonts-serif" control="serif" />
+        </hbox>
+        <menulist id="serif" delayprefsave="true" />
+        <spacer />
+        <spacer />
+
+        <!-- sans-serif row -->
+        <hbox align="center" pack="end">
+          <label data-l10n-id="fonts-sans-serif" control="sans-serif" />
+        </hbox>
+        <menulist id="sans-serif" delayprefsave="true" />
+        <spacer />
+        <spacer />
+
+        <!-- monospace row -->
+        <hbox align="center" pack="end">
+          <label data-l10n-id="fonts-monospace" control="monospace" />
+        </hbox>
+        <!--
+          FIXME(emilio): Why is this the only menulist here with crop="end"?
+          This goes back to the beginning of time...
+      -->
+        <menulist id="monospace" crop="end" delayprefsave="true" />
+        <hbox align="center" pack="end">
+          <label data-l10n-id="fonts-monospace-size" control="sizeMono" />
+        </hbox>
+        <menulist id="sizeMono" delayprefsave="true">
+          <menupopup>
+            <menuitem value="9" label="9" />
+            <menuitem value="10" label="10" />
+            <menuitem value="11" label="11" />
+            <menuitem value="12" label="12" />
+            <menuitem value="13" label="13" />
+            <menuitem value="14" label="14" />
+            <menuitem value="15" label="15" />
+            <menuitem value="16" label="16" />
+            <menuitem value="17" label="17" />
+            <menuitem value="18" label="18" />
+            <menuitem value="20" label="20" />
+            <menuitem value="22" label="22" />
+            <menuitem value="24" label="24" />
+            <menuitem value="26" label="26" />
+            <menuitem value="28" label="28" />
+            <menuitem value="30" label="30" />
+            <menuitem value="32" label="32" />
+            <menuitem value="34" label="34" />
+            <menuitem value="36" label="36" />
+            <menuitem value="40" label="40" />
+            <menuitem value="44" label="44" />
+            <menuitem value="48" label="48" />
+            <menuitem value="56" label="56" />
+            <menuitem value="64" label="64" />
+            <menuitem value="72" label="72" />
+          </menupopup>
+        </menulist>
+      </box>
+      <separator class="thin" />
+      <hbox align="center" pack="end">
+        <label data-l10n-id="fonts-minsize" control="minSize" />
+        <menulist id="minSize">
+          <menupopup>
+            <menuitem value="0" data-l10n-id="fonts-minsize-none" />
+            <menuitem value="9" label="9" />
+            <menuitem value="10" label="10" />
+            <menuitem value="11" label="11" />
+            <menuitem value="12" label="12" />
+            <menuitem value="13" label="13" />
+            <menuitem value="14" label="14" />
+            <menuitem value="15" label="15" />
+            <menuitem value="16" label="16" />
+            <menuitem value="17" label="17" />
+            <menuitem value="18" label="18" />
+            <menuitem value="20" label="20" />
+            <menuitem value="22" label="22" />
+            <menuitem value="24" label="24" />
+            <menuitem value="26" label="26" />
+            <menuitem value="28" label="28" />
+            <menuitem value="30" label="30" />
+            <menuitem value="32" label="32" />
+            <menuitem value="34" label="34" />
+            <menuitem value="36" label="36" />
+            <menuitem value="40" label="40" />
+            <menuitem value="44" label="44" />
+            <menuitem value="48" label="48" />
+            <menuitem value="56" label="56" />
+            <menuitem value="64" label="64" />
+            <menuitem value="72" label="72" />
+          </menupopup>
+        </menulist>
+      </hbox>
+      <separator />
+      <separator class="groove" />
+      <hbox>
+        <checkbox
+          id="useDocumentFonts"
+          data-l10n-id="fonts-allow-own"
+          preference="browser.display.use_document_fonts"
+        />
+      </hbox>
+    </groupbox>
+
+    <!-- Load the script after the elements for layout issues (bug 1501755). -->
+    <script src="chrome://mozapps/content/preferences/fontbuilder.js" />
+    <script src="chrome://browser/content/preferences/dialogs/fonts.js" />
+  </dialog>
+</window>
diff --git a/browser/components/preferences/dialogs/handlers.css b/browser/components/preferences/dialogs/handlers.css
new file mode 100644
index 0000000000..b53963fa4d
--- /dev/null
+++ b/browser/components/preferences/dialogs/handlers.css
@@ -0,0 +1,21 @@
+/* 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/. */
+
+/**
+ * Make the icons appear.
+ * Note: we display the icon box for every item whether or not it has an icon
+ * so the labels of all the items align vertically.
+ */
+.actionsMenu > menupopup > menuitem > .menu-iconic-left {
+  display: flex;
+  min-width: 16px;
+}
+
+/* Apply crisp rendering for favicons at exactly 2dppx resolution */
+@media (resolution: 2dppx) {
+  #handlersView > richlistitem,
+  .actionsMenu > menupopup > menuitem > .menu-iconic-left {
+    image-rendering: -moz-crisp-edges;
+  }
+}
diff --git a/browser/components/preferences/dialogs/jar.mn b/browser/components/preferences/dialogs/jar.mn
new file mode 100644
index 0000000000..a9f3dd1da2
--- /dev/null
+++ b/browser/components/preferences/dialogs/jar.mn
@@ -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/.
+
+browser.jar:
+   content/browser/preferences/dialogs/addEngine.xhtml
+   content/browser/preferences/dialogs/addEngine.js
+   content/browser/preferences/dialogs/addEngine.css
+   content/browser/preferences/dialogs/applicationManager.xhtml
+   content/browser/preferences/dialogs/applicationManager.js
+   content/browser/preferences/dialogs/blocklists.xhtml
+   content/browser/preferences/dialogs/blocklists.js
+   content/browser/preferences/dialogs/browserLanguages.xhtml
+   content/browser/preferences/dialogs/browserLanguages.js
+   content/browser/preferences/dialogs/clearSiteData.css
+   content/browser/preferences/dialogs/clearSiteData.js
+   content/browser/preferences/dialogs/clearSiteData.xhtml
+   content/browser/preferences/dialogs/colors.xhtml
+   content/browser/preferences/dialogs/colors.js
+   content/browser/preferences/dialogs/connection.xhtml
+   content/browser/preferences/dialogs/connection.js
+   content/browser/preferences/dialogs/dohExceptions.xhtml
+   content/browser/preferences/dialogs/dohExceptions.js
+   content/browser/preferences/dialogs/fonts.xhtml
+   content/browser/preferences/dialogs/fonts.js
+   content/browser/preferences/dialogs/handlers.css
+   content/browser/preferences/dialogs/languages.xhtml
+   content/browser/preferences/dialogs/languages.js
+   content/browser/preferences/dialogs/permissions.xhtml
+   content/browser/preferences/dialogs/sitePermissions.xhtml
+   content/browser/preferences/dialogs/sitePermissions.js
+   content/browser/preferences/dialogs/sitePermissions.css
+   content/browser/preferences/dialogs/containers.xhtml
+   content/browser/preferences/dialogs/containers.js
+   content/browser/preferences/dialogs/permissions.js
+   content/browser/preferences/dialogs/sanitize.xhtml
+   content/browser/preferences/dialogs/sanitize.js
+   content/browser/preferences/dialogs/selectBookmark.xhtml
+   content/browser/preferences/dialogs/selectBookmark.js
+   content/browser/preferences/dialogs/siteDataSettings.xhtml
+   content/browser/preferences/dialogs/siteDataSettings.js
+*  content/browser/preferences/dialogs/siteDataRemoveSelected.xhtml
+   content/browser/preferences/dialogs/siteDataRemoveSelected.js
+   content/browser/preferences/dialogs/syncChooseWhatToSync.xhtml
+   content/browser/preferences/dialogs/syncChooseWhatToSync.js
+   content/browser/preferences/dialogs/translationExceptions.xhtml
+   content/browser/preferences/dialogs/translationExceptions.js
+   content/browser/preferences/dialogs/translations.xhtml
+   content/browser/preferences/dialogs/translations.js
diff --git a/browser/components/preferences/dialogs/languages.js b/browser/components/preferences/dialogs/languages.js
new file mode 100644
index 0000000000..5e32e1c261
--- /dev/null
+++ b/browser/components/preferences/dialogs/languages.js
@@ -0,0 +1,386 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 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/. */
+
+/* import-globals-from /toolkit/content/preferencesBindings.js */
+
+document
+  .getElementById("LanguagesDialog")
+  .addEventListener("dialoghelp", window.top.openPrefsHelp);
+
+Preferences.addAll([
+  { id: "intl.accept_languages", type: "wstring" },
+  { id: "pref.browser.language.disable_button.up", type: "bool" },
+  { id: "pref.browser.language.disable_button.down", type: "bool" },
+  { id: "pref.browser.language.disable_button.remove", type: "bool" },
+  { id: "privacy.spoof_english", type: "int" },
+]);
+
+var gLanguagesDialog = {
+  _availableLanguagesList: [],
+  _acceptLanguages: {},
+
+  _selectedItemID: null,
+
+  onLoad() {
+    let spoofEnglishElement = document.getElementById("spoofEnglish");
+    Preferences.addSyncFromPrefListener(spoofEnglishElement, () =>
+      gLanguagesDialog.readSpoofEnglish()
+    );
+    Preferences.addSyncToPrefListener(spoofEnglishElement, () =>
+      gLanguagesDialog.writeSpoofEnglish()
+    );
+
+    Preferences.get("intl.accept_languages").on("change", () =>
+      this._readAcceptLanguages().catch(console.error)
+    );
+
+    if (!this._availableLanguagesList.length) {
+      document.mozSubdialogReady = this._loadAvailableLanguages();
+    }
+  },
+
+  get _activeLanguages() {
+    return document.getElementById("activeLanguages");
+  },
+
+  get _availableLanguages() {
+    return document.getElementById("availableLanguages");
+  },
+
+  async _loadAvailableLanguages() {
+    // This is a parser for: resource://gre/res/language.properties
+    // The file is formatted like so:
+    // ab[-cd].accept=true|false
+    //  ab = language
+    //  cd = region
+    var bundleAccepted = document.getElementById("bundleAccepted");
+
+    function LocaleInfo(aLocaleName, aLocaleCode, aIsVisible) {
+      this.name = aLocaleName;
+      this.code = aLocaleCode;
+      this.isVisible = aIsVisible;
+    }
+
+    // 1) Read the available languages out of language.properties
+
+    let localeCodes = [];
+    let localeValues = [];
+    for (let currString of bundleAccepted.strings) {
+      var property = currString.key.split("."); // ab[-cd].accept
+      if (property[1] == "accept") {
+        localeCodes.push(property[0]);
+        localeValues.push(currString.value);
+      }
+    }
+
+    let localeNames = Services.intl.getLocaleDisplayNames(
+      undefined,
+      localeCodes
+    );
+
+    for (let i in localeCodes) {
+      let isVisible =
+        localeValues[i] == "true" &&
+        (!(localeCodes[i] in this._acceptLanguages) ||
+          !this._acceptLanguages[localeCodes[i]]);
+
+      let li = new LocaleInfo(localeNames[i], localeCodes[i], isVisible);
+      this._availableLanguagesList.push(li);
+    }
+
+    await this._buildAvailableLanguageList();
+    await this._readAcceptLanguages();
+  },
+
+  async _buildAvailableLanguageList() {
+    var availableLanguagesPopup = document.getElementById(
+      "availableLanguagesPopup"
+    );
+    while (availableLanguagesPopup.hasChildNodes()) {
+      availableLanguagesPopup.firstChild.remove();
+    }
+
+    let frag = document.createDocumentFragment();
+
+    // Load the UI with the data
+    for (var i = 0; i < this._availableLanguagesList.length; ++i) {
+      let locale = this._availableLanguagesList[i];
+      let localeCode = locale.code;
+      if (
+        locale.isVisible &&
+        (!(localeCode in this._acceptLanguages) ||
+          !this._acceptLanguages[localeCode])
+      ) {
+        var menuitem = document.createXULElement("menuitem");
+        menuitem.id = localeCode;
+        document.l10n.setAttributes(menuitem, "languages-code-format", {
+          locale: locale.name,
+          code: localeCode,
+        });
+        frag.appendChild(menuitem);
+      }
+    }
+
+    await document.l10n.translateFragment(frag);
+
+    // Sort the list of languages by name
+    let comp = new Services.intl.Collator(undefined, {
+      usage: "sort",
+    });
+
+    let items = Array.from(frag.children);
+
+    items.sort((a, b) => {
+      return comp.compare(a.getAttribute("label"), b.getAttribute("label"));
+    });
+
+    // Re-append items in the correct order:
+    items.forEach(item => frag.appendChild(item));
+
+    availableLanguagesPopup.appendChild(frag);
+
+    this._availableLanguages.setAttribute(
+      "label",
+      this._availableLanguages.getAttribute("placeholder")
+    );
+  },
+
+  async _readAcceptLanguages() {
+    while (this._activeLanguages.hasChildNodes()) {
+      this._activeLanguages.firstChild.remove();
+    }
+
+    var selectedIndex = 0;
+    var preference = Preferences.get("intl.accept_languages");
+    if (preference.value == "") {
+      this._activeLanguages.selectedIndex = -1;
+      this.onLanguageSelect();
+      return;
+    }
+    var languages = preference.value.toLowerCase().split(/\s*,\s*/);
+    for (var i = 0; i < languages.length; ++i) {
+      var listitem = document.createXULElement("richlistitem");
+      var label = document.createXULElement("label");
+      listitem.appendChild(label);
+      listitem.id = languages[i];
+      if (languages[i] == this._selectedItemID) {
+        selectedIndex = i;
+      }
+      this._activeLanguages.appendChild(listitem);
+      var localeName = this._getLocaleName(languages[i]);
+      document.l10n.setAttributes(label, "languages-active-code-format", {
+        locale: localeName,
+        code: languages[i],
+      });
+
+      // Hash this language as an "Active" language so we don't
+      // show it in the list that can be added.
+      this._acceptLanguages[languages[i]] = true;
+    }
+
+    // We're forcing an early localization here because otherwise
+    // the initial sizing of the dialog will happen before it and
+    // result in overflow.
+    await document.l10n.translateFragment(this._activeLanguages);
+
+    if (this._activeLanguages.childNodes.length) {
+      this._activeLanguages.ensureIndexIsVisible(selectedIndex);
+      this._activeLanguages.selectedIndex = selectedIndex;
+    }
+
+    // Update states of accept-language list and buttons according to
+    // privacy.resistFingerprinting and privacy.spoof_english.
+    this.readSpoofEnglish();
+  },
+
+  onAvailableLanguageSelect() {
+    var availableLanguages = this._availableLanguages;
+    var addButton = document.getElementById("addButton");
+    addButton.disabled =
+      availableLanguages.disabled || availableLanguages.selectedIndex < 0;
+
+    this._availableLanguages.removeAttribute("accesskey");
+  },
+
+  addLanguage() {
+    var selectedID = this._availableLanguages.selectedItem.id;
+    var preference = Preferences.get("intl.accept_languages");
+    var arrayOfPrefs = preference.value.toLowerCase().split(/\s*,\s*/);
+    for (var i = 0; i < arrayOfPrefs.length; ++i) {
+      if (arrayOfPrefs[i] == selectedID) {
+        return;
+      }
+    }
+
+    this._selectedItemID = selectedID;
+
+    if (preference.value == "") {
+      preference.value = selectedID;
+    } else {
+      arrayOfPrefs.unshift(selectedID);
+      preference.value = arrayOfPrefs.join(",");
+    }
+
+    this._acceptLanguages[selectedID] = true;
+    this._availableLanguages.selectedItem = null;
+
+    // Rebuild the available list with the added item removed...
+    this._buildAvailableLanguageList().catch(console.error);
+  },
+
+  removeLanguage() {
+    // Build the new preference value string.
+    var languagesArray = [];
+    for (var i = 0; i < this._activeLanguages.childNodes.length; ++i) {
+      var item = this._activeLanguages.childNodes[i];
+      if (!item.selected) {
+        languagesArray.push(item.id);
+      } else {
+        this._acceptLanguages[item.id] = false;
+      }
+    }
+    var string = languagesArray.join(",");
+
+    // Get the item to select after the remove operation completes.
+    var selection = this._activeLanguages.selectedItems;
+    var lastSelected = selection[selection.length - 1];
+    var selectItem = lastSelected.nextSibling || lastSelected.previousSibling;
+    selectItem = selectItem ? selectItem.id : null;
+
+    this._selectedItemID = selectItem;
+
+    // Update the preference and force a UI rebuild
+    var preference = Preferences.get("intl.accept_languages");
+    preference.value = string;
+
+    this._buildAvailableLanguageList().catch(console.error);
+  },
+
+  _getLocaleName(localeCode) {
+    if (!this._availableLanguagesList.length) {
+      this._loadAvailableLanguages();
+    }
+    let languageName = "";
+    for (var i = 0; i < this._availableLanguagesList.length; ++i) {
+      if (localeCode == this._availableLanguagesList[i].code) {
+        return this._availableLanguagesList[i].name;
+      }
+      // Try resolving the locale code without region code. Can't return
+      // directly because there might be a perfect match later.
+      if (localeCode.split("-")[0] == this._availableLanguagesList[i].code) {
+        languageName = this._availableLanguagesList[i].name;
+      }
+    }
+
+    return languageName;
+  },
+
+  moveUp() {
+    var selectedItem = this._activeLanguages.selectedItems[0];
+    var previousItem = selectedItem.previousSibling;
+
+    var string = "";
+    for (var i = 0; i < this._activeLanguages.childNodes.length; ++i) {
+      var item = this._activeLanguages.childNodes[i];
+      string += i == 0 ? "" : ",";
+      if (item.id == previousItem.id) {
+        string += selectedItem.id;
+      } else if (item.id == selectedItem.id) {
+        string += previousItem.id;
+      } else {
+        string += item.id;
+      }
+    }
+
+    this._selectedItemID = selectedItem.id;
+
+    // Update the preference and force a UI rebuild
+    var preference = Preferences.get("intl.accept_languages");
+    preference.value = string;
+  },
+
+  moveDown() {
+    var selectedItem = this._activeLanguages.selectedItems[0];
+    var nextItem = selectedItem.nextSibling;
+
+    var string = "";
+    for (var i = 0; i < this._activeLanguages.childNodes.length; ++i) {
+      var item = this._activeLanguages.childNodes[i];
+      string += i == 0 ? "" : ",";
+      if (item.id == nextItem.id) {
+        string += selectedItem.id;
+      } else if (item.id == selectedItem.id) {
+        string += nextItem.id;
+      } else {
+        string += item.id;
+      }
+    }
+
+    this._selectedItemID = selectedItem.id;
+
+    // Update the preference and force a UI rebuild
+    var preference = Preferences.get("intl.accept_languages");
+    preference.value = string;
+  },
+
+  onLanguageSelect() {
+    var upButton = document.getElementById("up");
+    var downButton = document.getElementById("down");
+    var removeButton = document.getElementById("remove");
+    switch (this._activeLanguages.selectedCount) {
+      case 0:
+        upButton.disabled = downButton.disabled = removeButton.disabled = true;
+        break;
+      case 1:
+        upButton.disabled = this._activeLanguages.selectedIndex == 0;
+        downButton.disabled =
+          this._activeLanguages.selectedIndex ==
+          this._activeLanguages.childNodes.length - 1;
+        removeButton.disabled = false;
+        break;
+      default:
+        upButton.disabled = true;
+        downButton.disabled = true;
+        removeButton.disabled = false;
+    }
+  },
+
+  readSpoofEnglish() {
+    var checkbox = document.getElementById("spoofEnglish");
+    var resistFingerprinting = Services.prefs.getBoolPref(
+      "privacy.resistFingerprinting"
+    );
+    if (!resistFingerprinting) {
+      checkbox.hidden = true;
+      return false;
+    }
+
+    var spoofEnglish = Preferences.get("privacy.spoof_english").value;
+    var activeLanguages = this._activeLanguages;
+    var availableLanguages = this._availableLanguages;
+    checkbox.hidden = false;
+    switch (spoofEnglish) {
+      case 1: // don't spoof intl.accept_languages
+        activeLanguages.disabled = false;
+        activeLanguages.selectItem(activeLanguages.firstChild);
+        availableLanguages.disabled = false;
+        this.onAvailableLanguageSelect();
+        return false;
+      case 2: // spoof intl.accept_languages
+        activeLanguages.clearSelection();
+        activeLanguages.disabled = true;
+        availableLanguages.disabled = true;
+        this.onAvailableLanguageSelect();
+        return true;
+      default:
+        // will prompt for spoofing intl.accept_languages if resisting fingerprinting
+        return false;
+    }
+  },
+
+  writeSpoofEnglish() {
+    return document.getElementById("spoofEnglish").checked ? 2 : 1;
+  },
+};
diff --git a/browser/components/preferences/dialogs/languages.xhtml b/browser/components/preferences/dialogs/languages.xhtml
new file mode 100644
index 0000000000..67717253a7
--- /dev/null
+++ b/browser/components/preferences/dialogs/languages.xhtml
@@ -0,0 +1,107 @@
+<?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/. -->
+
+<window
+  type="child"
+  xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"
+  xmlns:html="http://www.w3.org/1999/xhtml"
+  data-l10n-id="webpage-languages-window2"
+  data-l10n-attrs="title, style"
+  persist="lastSelected"
+  onload="gLanguagesDialog.onLoad();"
+>
+  <dialog
+    id="LanguagesDialog"
+    buttons="accept,cancel,help"
+    helpTopic="prefs-languages"
+  >
+    <linkset>
+      <html:link rel="stylesheet" href="chrome://global/skin/global.css" />
+      <html:link
+        rel="stylesheet"
+        href="chrome://browser/skin/preferences/preferences.css"
+      />
+
+      <html:link rel="localization" href="browser/preferences/languages.ftl" />
+    </linkset>
+
+    <script src="chrome://browser/content/utilityOverlay.js" />
+    <script src="chrome://global/content/preferencesBindings.js" />
+    <script src="chrome://browser/content/preferences/dialogs/languages.js" />
+
+    <keyset>
+      <key
+        data-l10n-id="languages-close-key"
+        modifiers="accel"
+        oncommand="Preferences.close(event)"
+      />
+    </keyset>
+
+    <stringbundleset id="languageSet">
+      <stringbundle
+        id="bundleAccepted"
+        src="resource://gre/res/language.properties"
+      />
+    </stringbundleset>
+
+    <description data-l10n-id="languages-description" />
+    <checkbox
+      id="spoofEnglish"
+      data-l10n-id="languages-customize-spoof-english"
+      preference="privacy.spoof_english"
+    />
+    <box class="languages-grid">
+      <richlistbox
+        id="activeLanguages"
+        seltype="multiple"
+        onselect="gLanguagesDialog.onLanguageSelect();"
+      />
+      <vbox>
+        <button
+          id="up"
+          class="up"
+          oncommand="gLanguagesDialog.moveUp();"
+          disabled="true"
+          data-l10n-id="languages-customize-moveup"
+          preference="pref.browser.language.disable_button.up"
+        />
+        <button
+          id="down"
+          class="down"
+          oncommand="gLanguagesDialog.moveDown();"
+          disabled="true"
+          data-l10n-id="languages-customize-movedown"
+          preference="pref.browser.language.disable_button.down"
+        />
+        <button
+          id="remove"
+          oncommand="gLanguagesDialog.removeLanguage();"
+          disabled="true"
+          data-l10n-id="languages-customize-remove"
+          preference="pref.browser.language.disable_button.remove"
+        />
+      </vbox>
+      <!-- This <vbox> is needed to position search tooltips correctly. -->
+      <vbox>
+        <menulist
+          id="availableLanguages"
+          oncommand="gLanguagesDialog.onAvailableLanguageSelect();"
+          data-l10n-id="languages-customize-select-language"
+          data-l10n-attrs="placeholder"
+        >
+          <menupopup id="availableLanguagesPopup" />
+        </menulist>
+      </vbox>
+      <button
+        id="addButton"
+        class="add-web-language"
+        oncommand="gLanguagesDialog.addLanguage();"
+        disabled="true"
+        data-l10n-id="languages-customize-add"
+      />
+    </box>
+  </dialog>
+</window>
diff --git a/browser/components/preferences/dialogs/moz.build b/browser/components/preferences/dialogs/moz.build
new file mode 100644
index 0000000000..603c560505
--- /dev/null
+++ b/browser/components/preferences/dialogs/moz.build
@@ -0,0 +1,13 @@
+# -*- 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/.
+
+for var in ("MOZ_APP_NAME", "MOZ_MACBUNDLE_NAME"):
+    DEFINES[var] = CONFIG[var]
+
+if CONFIG["MOZ_WIDGET_TOOLKIT"] in ("windows", "gtk", "cocoa"):
+    DEFINES["HAVE_SHELL_SERVICE"] = 1
+
+JAR_MANIFESTS += ["jar.mn"]
diff --git a/browser/components/preferences/dialogs/permissions.js b/browser/components/preferences/dialogs/permissions.js
new file mode 100644
index 0000000000..32ebeae128
--- /dev/null
+++ b/browser/components/preferences/dialogs/permissions.js
@@ -0,0 +1,673 @@
+/* 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/. */
+
+var { AppConstants } = ChromeUtils.importESModule(
+  "resource://gre/modules/AppConstants.sys.mjs"
+);
+
+var { XPCOMUtils } = ChromeUtils.importESModule(
+  "resource://gre/modules/XPCOMUtils.sys.mjs"
+);
+
+const lazy = {};
+
+XPCOMUtils.defineLazyServiceGetter(
+  lazy,
+  "contentBlockingAllowList",
+  "@mozilla.org/content-blocking-allow-list;1",
+  "nsIContentBlockingAllowList"
+);
+
+const permissionExceptionsL10n = {
+  trackingprotection: {
+    window: "permissions-exceptions-etp-window2",
+    description: "permissions-exceptions-manage-etp-desc",
+  },
+  cookie: {
+    window: "permissions-exceptions-cookie-window2",
+    description: "permissions-exceptions-cookie-desc",
+  },
+  popup: {
+    window: "permissions-exceptions-popup-window2",
+    description: "permissions-exceptions-popup-desc",
+  },
+  "login-saving": {
+    window: "permissions-exceptions-saved-passwords-window",
+    description: "permissions-exceptions-saved-passwords-desc",
+  },
+  "https-only-load-insecure": {
+    window: "permissions-exceptions-https-only-window2",
+    description: "permissions-exceptions-https-only-desc2",
+  },
+  install: {
+    window: "permissions-exceptions-addons-window2",
+    description: "permissions-exceptions-addons-desc",
+  },
+};
+
+function Permission(principal, type, capability) {
+  this.principal = principal;
+  this.origin = principal.origin;
+  this.type = type;
+  this.capability = capability;
+}
+
+var gPermissionManager = {
+  _type: "",
+  _isObserving: false,
+  _permissions: new Map(),
+  _permissionsToAdd: new Map(),
+  _permissionsToDelete: new Map(),
+  _bundle: null,
+  _list: null,
+  _removeButton: null,
+  _removeAllButton: null,
+  _forcedHTTP: null,
+
+  onLoad() {
+    let params = window.arguments[0];
+    document.mozSubdialogReady = this.init(params);
+  },
+
+  /**
+   * @param {Object} params
+   * @param {string} params.permissionType Permission type for which the dialog should be shown
+   * @param {string} params.prefilledHost The value which the URL field should initially contain
+   * @param {boolean} params.blockVisible Display the "Block" button in the dialog
+   * @param {boolean} params.sessionVisible Display the "Allow for Session" button in the dialog (Only for Cookie & HTTPS-Only permissions)
+   * @param {boolean} params.allowVisible Display the "Allow" button in the dialog
+   * @param {boolean} params.disableETPVisible Display the "Add Exception" button in the dialog (Only for ETP permissions)
+   * @param {boolean} params.hideStatusColumn Hide the "Status" column in the dialog
+   * @param {boolean} params.forcedHTTP Save inputs whose URI has a HTTPS scheme with a HTTP scheme (Used by HTTPS-Only)
+   */
+  async init(params) {
+    if (!this._isObserving) {
+      Services.obs.addObserver(this, "perm-changed");
+      this._isObserving = true;
+    }
+
+    document.addEventListener("dialogaccept", () => this.onApplyChanges());
+
+    this._type = params.permissionType;
+    this._list = document.getElementById("permissionsBox");
+    this._removeButton = document.getElementById("removePermission");
+    this._removeAllButton = document.getElementById("removeAllPermissions");
+
+    this._btnCookieSession = document.getElementById("btnCookieSession");
+    this._btnBlock = document.getElementById("btnBlock");
+    this._btnDisableETP = document.getElementById("btnDisableETP");
+    this._btnAllow = document.getElementById("btnAllow");
+    this._btnHttpsOnlyOff = document.getElementById("btnHttpsOnlyOff");
+    this._btnHttpsOnlyOffTmp = document.getElementById("btnHttpsOnlyOffTmp");
+
+    let permissionsText = document.getElementById("permissionsText");
+
+    let l10n = permissionExceptionsL10n[this._type];
+    document.l10n.setAttributes(permissionsText, l10n.description);
+    document.l10n.setAttributes(document.documentElement, l10n.window);
+
+    let urlFieldVisible =
+      params.blockVisible ||
+      params.sessionVisible ||
+      params.allowVisible ||
+      params.disableETPVisible;
+
+    this._urlField = document.getElementById("url");
+    this._urlField.value = params.prefilledHost;
+    this._urlField.hidden = !urlFieldVisible;
+
+    this._forcedHTTP = params.forcedHTTP;
+
+    await document.l10n.translateElements([
+      permissionsText,
+      document.documentElement,
+    ]);
+
+    document.getElementById("btnDisableETP").hidden = !params.disableETPVisible;
+    document.getElementById("btnBlock").hidden = !params.blockVisible;
+    document.getElementById("btnCookieSession").hidden = !(
+      params.sessionVisible && this._type == "cookie"
+    );
+    document.getElementById("btnHttpsOnlyOff").hidden = !(
+      this._type == "https-only-load-insecure"
+    );
+    document.getElementById("btnHttpsOnlyOffTmp").hidden = !(
+      params.sessionVisible && this._type == "https-only-load-insecure"
+    );
+    document.getElementById("btnAllow").hidden = !params.allowVisible;
+
+    this.onHostInput(this._urlField);
+
+    let urlLabel = document.getElementById("urlLabel");
+    urlLabel.hidden = !urlFieldVisible;
+
+    this._hideStatusColumn = params.hideStatusColumn;
+    let statusCol = document.getElementById("statusCol");
+    statusCol.hidden = this._hideStatusColumn;
+    if (this._hideStatusColumn) {
+      statusCol.removeAttribute("data-isCurrentSortCol");
+      document
+        .getElementById("siteCol")
+        .setAttribute("data-isCurrentSortCol", "true");
+    }
+
+    Services.obs.notifyObservers(null, "flush-pending-permissions", this._type);
+
+    this._loadPermissions();
+    this.buildPermissionsList();
+
+    this._urlField.focus();
+  },
+
+  uninit() {
+    if (this._isObserving) {
+      Services.obs.removeObserver(this, "perm-changed");
+      this._isObserving = false;
+    }
+  },
+
+  observe(subject, topic, data) {
+    if (topic !== "perm-changed") {
+      return;
+    }
+
+    let permission = subject.QueryInterface(Ci.nsIPermission);
+
+    // Ignore unrelated permission types.
+    if (permission.type !== this._type) {
+      return;
+    }
+
+    if (data == "added") {
+      this._addPermissionToList(permission);
+      this.buildPermissionsList();
+    } else if (data == "changed") {
+      let p = this._permissions.get(permission.principal.origin);
+      // Maybe this item has been excluded before because it had an invalid capability.
+      if (p) {
+        p.capability = permission.capability;
+        this._handleCapabilityChange(p);
+      } else {
+        this._addPermissionToList(permission);
+      }
+      this.buildPermissionsList();
+    } else if (data == "deleted") {
+      this._removePermissionFromList(permission.principal.origin);
+    }
+  },
+
+  _handleCapabilityChange(perm) {
+    let permissionlistitem = document.getElementsByAttribute(
+      "origin",
+      perm.origin
+    )[0];
+    document.l10n.setAttributes(
+      permissionlistitem.querySelector(".website-capability-value"),
+      this._getCapabilityL10nId(perm.capability)
+    );
+  },
+
+  _isCapabilitySupported(capability) {
+    return (
+      capability == Ci.nsIPermissionManager.ALLOW_ACTION ||
+      capability == Ci.nsIPermissionManager.DENY_ACTION ||
+      capability == Ci.nsICookiePermission.ACCESS_SESSION ||
+      // Bug 1753600 there are still a few legacy cookies around that have the capability 9,
+      // _getCapabilityL10nId will throw if it receives a capability of 9
+      // that is not in combination with the type https-only-load-insecure
+      (capability ==
+        Ci.nsIHttpsOnlyModePermission.LOAD_INSECURE_ALLOW_SESSION &&
+        this._type == "https-only-load-insecure")
+    );
+  },
+
+  _getCapabilityL10nId(capability) {
+    // HTTPS-Only Mode phrases exceptions as turning it off
+    if (this._type == "https-only-load-insecure") {
+      return this._getHttpsOnlyCapabilityL10nId(capability);
+    }
+
+    switch (capability) {
+      case Ci.nsIPermissionManager.ALLOW_ACTION:
+        return "permissions-capabilities-listitem-allow";
+      case Ci.nsIPermissionManager.DENY_ACTION:
+        return "permissions-capabilities-listitem-block";
+      case Ci.nsICookiePermission.ACCESS_SESSION:
+        return "permissions-capabilities-listitem-allow-session";
+      default:
+        throw new Error(`Unknown capability: ${capability}`);
+    }
+  },
+
+  _getHttpsOnlyCapabilityL10nId(capability) {
+    switch (capability) {
+      case Ci.nsIPermissionManager.ALLOW_ACTION:
+        return "permissions-capabilities-listitem-off";
+      case Ci.nsIHttpsOnlyModePermission.LOAD_INSECURE_ALLOW_SESSION:
+        return "permissions-capabilities-listitem-off-temporarily";
+      default:
+        throw new Error(`Unknown HTTPS-Only Mode capability: ${capability}`);
+    }
+  },
+
+  _addPermissionToList(perm) {
+    if (perm.type !== this._type) {
+      return;
+    }
+    if (!this._isCapabilitySupported(perm.capability)) {
+      return;
+    }
+
+    // Skip private browsing session permissions.
+    if (
+      perm.principal.privateBrowsingId !==
+        Services.scriptSecurityManager.DEFAULT_PRIVATE_BROWSING_ID &&
+      perm.expireType === Services.perms.EXPIRE_SESSION
+    ) {
+      return;
+    }
+
+    let p = new Permission(perm.principal, perm.type, perm.capability);
+    this._permissions.set(p.origin, p);
+  },
+
+  _addOrModifyPermission(principal, capability) {
+    // check whether the permission already exists, if not, add it
+    let permissionParams = { principal, type: this._type, capability };
+    let existingPermission = this._permissions.get(principal.origin);
+    if (!existingPermission) {
+      this._permissionsToAdd.set(principal.origin, permissionParams);
+      this._addPermissionToList(permissionParams);
+      this.buildPermissionsList();
+    } else if (existingPermission.capability != capability) {
+      existingPermission.capability = capability;
+      this._permissionsToAdd.set(principal.origin, permissionParams);
+      this._handleCapabilityChange(existingPermission);
+    }
+  },
+
+  _addNewPrincipalToList(list, uri) {
+    list.push(Services.scriptSecurityManager.createContentPrincipal(uri, {}));
+    // If we have ended up with an unknown scheme, the following will throw.
+    list[list.length - 1].origin;
+  },
+
+  addPermission(capability) {
+    let textbox = document.getElementById("url");
+    let input_url = textbox.value.trim(); // trim any leading and trailing space
+    let principals = [];
+    try {
+      // The origin accessor on the principal object will throw if the
+      // principal doesn't have a canonical origin representation. This will
+      // help catch cases where the URI parser parsed something like
+      // `localhost:8080` as having the scheme `localhost`, rather than being
+      // an invalid URI. A canonical origin representation is required by the
+      // permission manager for storage, so this won't prevent any valid
+      // permissions from being entered by the user.
+      try {
+        let uri = Services.io.newURI(input_url);
+        if (this._forcedHTTP && uri.schemeIs("https")) {
+          uri = uri.mutate().setScheme("http").finalize();
+        }
+        let principal = Services.scriptSecurityManager.createContentPrincipal(
+          uri,
+          {}
+        );
+        if (principal.origin.startsWith("moz-nullprincipal:")) {
+          throw new Error("Null principal");
+        }
+        principals.push(principal);
+      } catch (ex) {
+        // If the `input_url` already starts with http:// or https://, it is
+        // definetely invalid here and can't be fixed by prefixing it with
+        // http:// or https://.
+        if (
+          input_url.startsWith("http://") ||
+          input_url.startsWith("https://")
+        ) {
+          throw ex;
+        }
+        this._addNewPrincipalToList(
+          principals,
+          Services.io.newURI("http://" + input_url)
+        );
+        if (!this._forcedHTTP) {
+          this._addNewPrincipalToList(
+            principals,
+            Services.io.newURI("https://" + input_url)
+          );
+        }
+      }
+    } catch (ex) {
+      document.l10n
+        .formatValues([
+          { id: "permissions-invalid-uri-title" },
+          { id: "permissions-invalid-uri-label" },
+        ])
+        .then(([title, message]) => {
+          Services.prompt.alert(window, title, message);
+        });
+      return;
+    }
+    // In case of an ETP exception we compute the contentBlockingAllowList principal
+    // to align with the allow list behavior triggered by the protections panel
+    if (this._type == "trackingprotection") {
+      principals = principals.map(
+        lazy.contentBlockingAllowList.computeContentBlockingAllowListPrincipal
+      );
+    }
+    for (let principal of principals) {
+      this._addOrModifyPermission(principal, capability);
+    }
+
+    textbox.value = "";
+    textbox.focus();
+
+    // covers a case where the site exists already, so the buttons don't disable
+    this.onHostInput(textbox);
+
+    // enable "remove all" button as needed
+    this._setRemoveButtonState();
+  },
+
+  _removePermission(permission) {
+    this._removePermissionFromList(permission.origin);
+
+    // If this permission was added during this session, let's remove
+    // it from the pending adds list to prevent calls to the
+    // permission manager.
+    let isNewPermission = this._permissionsToAdd.delete(permission.origin);
+    if (!isNewPermission) {
+      this._permissionsToDelete.set(permission.origin, permission);
+    }
+  },
+
+  _removePermissionFromList(origin) {
+    this._permissions.delete(origin);
+    let permissionlistitem = document.getElementsByAttribute(
+      "origin",
+      origin
+    )[0];
+    if (permissionlistitem) {
+      permissionlistitem.remove();
+    }
+  },
+
+  _loadPermissions() {
+    // load permissions into a table.
+    for (let nextPermission of Services.perms.all) {
+      this._addPermissionToList(nextPermission);
+    }
+  },
+
+  _createPermissionListItem(permission) {
+    let disabledByPolicy = this._permissionDisabledByPolicy(permission);
+    let richlistitem = document.createXULElement("richlistitem");
+    richlistitem.setAttribute("origin", permission.origin);
+    let row = document.createXULElement("hbox");
+    row.setAttribute("style", "flex: 1");
+
+    let hbox = document.createXULElement("hbox");
+    let website = document.createXULElement("label");
+    website.setAttribute("disabled", disabledByPolicy);
+    website.setAttribute("class", "website-name-value");
+    website.setAttribute("value", permission.origin);
+    hbox.setAttribute("class", "website-name");
+    hbox.setAttribute("style", "flex: 3 3; width: 0");
+    hbox.appendChild(website);
+    row.appendChild(hbox);
+
+    if (!this._hideStatusColumn) {
+      hbox = document.createXULElement("hbox");
+      let capability = document.createXULElement("label");
+      capability.setAttribute("disabled", disabledByPolicy);
+      capability.setAttribute("class", "website-capability-value");
+      document.l10n.setAttributes(
+        capability,
+        this._getCapabilityL10nId(permission.capability)
+      );
+      hbox.setAttribute("class", "website-name");
+      hbox.setAttribute("style", "flex: 1; width: 0");
+      hbox.appendChild(capability);
+      row.appendChild(hbox);
+    }
+
+    richlistitem.appendChild(row);
+    return richlistitem;
+  },
+
+  onWindowKeyPress(event) {
+    // Prevent dialog.js from closing the dialog when the user submits the input
+    // field via the return key.
+    if (
+      event.keyCode == KeyEvent.DOM_VK_RETURN &&
+      document.activeElement == this._urlField
+    ) {
+      event.preventDefault();
+    }
+  },
+
+  onPermissionKeyPress(event) {
+    if (!this._list.selectedItem) {
+      return;
+    }
+
+    if (
+      event.keyCode == KeyEvent.DOM_VK_DELETE ||
+      (AppConstants.platform == "macosx" &&
+        event.keyCode == KeyEvent.DOM_VK_BACK_SPACE)
+    ) {
+      this.onPermissionDelete();
+      event.preventDefault();
+    }
+  },
+
+  onHostKeyPress(event) {
+    if (event.keyCode == KeyEvent.DOM_VK_RETURN) {
+      if (!document.getElementById("btnAllow").hidden) {
+        document.getElementById("btnAllow").click();
+      } else if (!document.getElementById("btnBlock").hidden) {
+        document.getElementById("btnBlock").click();
+      } else if (!document.getElementById("btnHttpsOnlyOff").hidden) {
+        document.getElementById("btnHttpsOnlyOff").click();
+      } else if (!document.getElementById("btnDisableETP").hidden) {
+        document.getElementById("btnDisableETP").click();
+      }
+    }
+  },
+
+  onHostInput(siteField) {
+    this._btnCookieSession.disabled =
+      this._btnCookieSession.hidden || !siteField.value;
+    this._btnHttpsOnlyOff.disabled =
+      this._btnHttpsOnlyOff.hidden || !siteField.value;
+    this._btnHttpsOnlyOffTmp.disabled =
+      this._btnHttpsOnlyOffTmp.hidden || !siteField.value;
+    this._btnBlock.disabled = this._btnBlock.hidden || !siteField.value;
+    this._btnDisableETP.disabled =
+      this._btnDisableETP.hidden || !siteField.value;
+    this._btnAllow.disabled = this._btnAllow.hidden || !siteField.value;
+  },
+
+  _setRemoveButtonState() {
+    if (!this._list) {
+      return;
+    }
+
+    let hasSelection = this._list.selectedIndex >= 0;
+
+    let disabledByPolicy = false;
+    if (Services.policies.status === Services.policies.ACTIVE && hasSelection) {
+      let origin = this._list.selectedItem.getAttribute("origin");
+      disabledByPolicy = this._permissionDisabledByPolicy(
+        this._permissions.get(origin)
+      );
+    }
+
+    this._removeButton.disabled = !hasSelection || disabledByPolicy;
+    let disabledItems = this._list.querySelectorAll(
+      "label.website-name-value[disabled='true']"
+    );
+
+    this._removeAllButton.disabled =
+      this._list.itemCount == disabledItems.length;
+  },
+
+  onPermissionDelete() {
+    let richlistitem = this._list.selectedItem;
+    let origin = richlistitem.getAttribute("origin");
+    let permission = this._permissions.get(origin);
+    if (this._permissionDisabledByPolicy(permission)) {
+      return;
+    }
+
+    this._removePermission(permission);
+
+    this._setRemoveButtonState();
+  },
+
+  onAllPermissionsDelete() {
+    for (let permission of this._permissions.values()) {
+      if (this._permissionDisabledByPolicy(permission)) {
+        continue;
+      }
+      this._removePermission(permission);
+    }
+
+    this._setRemoveButtonState();
+  },
+
+  onPermissionSelect() {
+    this._setRemoveButtonState();
+  },
+
+  onApplyChanges() {
+    // Stop observing permission changes since we are about
+    // to write out the pending adds/deletes and don't need
+    // to update the UI
+    this.uninit();
+
+    for (let p of this._permissionsToDelete.values()) {
+      Services.perms.removeFromPrincipal(p.principal, p.type);
+    }
+
+    for (let p of this._permissionsToAdd.values()) {
+      // If this sets the HTTPS-Only exemption only for this
+      // session, then the expire-type has to be set.
+      if (
+        p.capability ==
+        Ci.nsIHttpsOnlyModePermission.LOAD_INSECURE_ALLOW_SESSION
+      ) {
+        Services.perms.addFromPrincipal(
+          p.principal,
+          p.type,
+          p.capability,
+          Ci.nsIPermissionManager.EXPIRE_SESSION
+        );
+      } else {
+        Services.perms.addFromPrincipal(p.principal, p.type, p.capability);
+      }
+    }
+  },
+
+  buildPermissionsList(sortCol) {
+    // Clear old entries.
+    let oldItems = this._list.querySelectorAll("richlistitem");
+    for (let item of oldItems) {
+      item.remove();
+    }
+    let frag = document.createDocumentFragment();
+
+    let permissions = Array.from(this._permissions.values());
+
+    for (let permission of permissions) {
+      let richlistitem = this._createPermissionListItem(permission);
+      frag.appendChild(richlistitem);
+    }
+
+    // Sort permissions.
+    this._sortPermissions(this._list, frag, sortCol);
+
+    this._list.appendChild(frag);
+
+    this._setRemoveButtonState();
+  },
+
+  _permissionDisabledByPolicy(permission) {
+    let permissionObject = Services.perms.getPermissionObject(
+      permission.principal,
+      this._type,
+      false
+    );
+    return (
+      permissionObject?.expireType == Ci.nsIPermissionManager.EXPIRE_POLICY
+    );
+  },
+
+  _sortPermissions(list, frag, column) {
+    let sortDirection;
+
+    if (!column) {
+      column = document.querySelector("treecol[data-isCurrentSortCol=true]");
+      sortDirection =
+        column.getAttribute("data-last-sortDirection") || "ascending";
+    } else {
+      sortDirection = column.getAttribute("data-last-sortDirection");
+      sortDirection =
+        sortDirection === "ascending" ? "descending" : "ascending";
+    }
+
+    let sortFunc = null;
+    switch (column.id) {
+      case "siteCol":
+        sortFunc = (a, b) => {
+          return comp.compare(
+            a.getAttribute("origin"),
+            b.getAttribute("origin")
+          );
+        };
+        break;
+
+      case "statusCol":
+        sortFunc = (a, b) => {
+          // The capabilities values ("Allow" and "Block") are localized asynchronously.
+          // Sort based on the guaranteed-present localization ID instead, note that the
+          // ascending/descending arrow may be pointing the wrong way.
+          return (
+            a
+              .querySelector(".website-capability-value")
+              .getAttribute("data-l10n-id") >
+            b
+              .querySelector(".website-capability-value")
+              .getAttribute("data-l10n-id")
+          );
+        };
+        break;
+    }
+
+    let comp = new Services.intl.Collator(undefined, {
+      usage: "sort",
+    });
+
+    let items = Array.from(frag.querySelectorAll("richlistitem"));
+
+    if (sortDirection === "descending") {
+      items.sort((a, b) => sortFunc(b, a));
+    } else {
+      items.sort(sortFunc);
+    }
+
+    // Re-append items in the correct order:
+    items.forEach(item => frag.appendChild(item));
+
+    let cols = list.previousElementSibling.querySelectorAll("treecol");
+    cols.forEach(c => {
+      c.removeAttribute("data-isCurrentSortCol");
+      c.removeAttribute("sortDirection");
+    });
+    column.setAttribute("data-isCurrentSortCol", "true");
+    column.setAttribute("sortDirection", sortDirection);
+    column.setAttribute("data-last-sortDirection", sortDirection);
+  },
+};
diff --git a/browser/components/preferences/dialogs/permissions.xhtml b/browser/components/preferences/dialogs/permissions.xhtml
new file mode 100644
index 0000000000..78c2461e2d
--- /dev/null
+++ b/browser/components/preferences/dialogs/permissions.xhtml
@@ -0,0 +1,140 @@
+<?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/. -->
+
+<window
+  id="PermissionsDialog"
+  xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"
+  xmlns:html="http://www.w3.org/1999/xhtml"
+  data-l10n-id="permissions-window2"
+  data-l10n-attrs="title, style"
+  onload="gPermissionManager.onLoad();"
+  onunload="gPermissionManager.uninit();"
+  persist="width height"
+  onkeypress="gPermissionManager.onWindowKeyPress(event);"
+>
+  <dialog
+    buttons="accept,cancel"
+    data-l10n-id="permission-dialog"
+    data-l10n-attrs="buttonlabelaccept, buttonaccesskeyaccept"
+  >
+    <linkset>
+      <html:link rel="stylesheet" href="chrome://global/skin/global.css" />
+      <html:link
+        rel="stylesheet"
+        href="chrome://browser/content/preferences/dialogs/sitePermissions.css"
+      />
+      <html:link
+        rel="stylesheet"
+        href="chrome://browser/skin/preferences/preferences.css"
+      />
+
+      <html:link rel="localization" href="branding/brand.ftl" />
+      <html:link
+        rel="localization"
+        href="browser/preferences/permissions.ftl"
+      />
+    </linkset>
+
+    <script src="chrome://browser/content/preferences/dialogs/permissions.js" />
+
+    <keyset>
+      <key
+        data-l10n-id="permissions-close-key"
+        modifiers="accel"
+        oncommand="window.close();"
+      />
+    </keyset>
+
+    <vbox class="contentPane">
+      <description id="permissionsText" control="url" />
+      <separator class="thin" />
+      <label id="urlLabel" control="url" data-l10n-id="permissions-address" />
+      <hbox align="start">
+        <html:input
+          id="url"
+          type="text"
+          style="flex: 1"
+          oninput="gPermissionManager.onHostInput(event.target);"
+          onkeypress="gPermissionManager.onHostKeyPress(event);"
+        />
+      </hbox>
+      <hbox pack="end">
+        <button
+          id="btnDisableETP"
+          disabled="true"
+          data-l10n-id="permissions-disable-etp"
+          oncommand="gPermissionManager.addPermission(Ci.nsIPermissionManager.ALLOW_ACTION);"
+        />
+        <button
+          id="btnBlock"
+          disabled="true"
+          data-l10n-id="permissions-block"
+          oncommand="gPermissionManager.addPermission(Ci.nsIPermissionManager.DENY_ACTION);"
+        />
+        <button
+          id="btnCookieSession"
+          disabled="true"
+          data-l10n-id="permissions-session"
+          oncommand="gPermissionManager.addPermission(Ci.nsICookiePermission.ACCESS_SESSION);"
+        />
+        <button
+          id="btnAllow"
+          disabled="true"
+          data-l10n-id="permissions-allow"
+          oncommand="gPermissionManager.addPermission(Ci.nsIPermissionManager.ALLOW_ACTION);"
+        />
+        <button
+          id="btnHttpsOnlyOff"
+          disabled="true"
+          data-l10n-id="permissions-button-off"
+          oncommand="gPermissionManager.addPermission(Ci.nsIPermissionManager.ALLOW_ACTION);"
+        />
+        <button
+          id="btnHttpsOnlyOffTmp"
+          disabled="true"
+          data-l10n-id="permissions-button-off-temporarily"
+          oncommand="gPermissionManager.addPermission(Ci.nsIHttpsOnlyModePermission.LOAD_INSECURE_ALLOW_SESSION);"
+        />
+      </hbox>
+      <separator class="thin" />
+      <listheader>
+        <treecol
+          id="siteCol"
+          data-l10n-id="permissions-site-name"
+          style="flex: 3 3 auto; width: 0"
+          onclick="gPermissionManager.buildPermissionsList(event.target)"
+        />
+        <treecol
+          id="statusCol"
+          data-l10n-id="permissions-status"
+          style="flex: 1 1 auto; width: 0"
+          data-isCurrentSortCol="true"
+          onclick="gPermissionManager.buildPermissionsList(event.target);"
+        />
+      </listheader>
+      <richlistbox
+        id="permissionsBox"
+        selected="false"
+        onkeypress="gPermissionManager.onPermissionKeyPress(event);"
+        onselect="gPermissionManager.onPermissionSelect();"
+      />
+    </vbox>
+
+    <hbox class="actionButtons">
+      <button
+        id="removePermission"
+        disabled="true"
+        data-l10n-id="permissions-remove"
+        oncommand="gPermissionManager.onPermissionDelete();"
+      />
+      <button
+        id="removeAllPermissions"
+        data-l10n-id="permissions-remove-all"
+        oncommand="gPermissionManager.onAllPermissionsDelete();"
+      />
+    </hbox>
+  </dialog>
+</window>
diff --git a/browser/components/preferences/dialogs/sanitize.js b/browser/components/preferences/dialogs/sanitize.js
new file mode 100644
index 0000000000..37f818e011
--- /dev/null
+++ b/browser/components/preferences/dialogs/sanitize.js
@@ -0,0 +1,38 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 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/. */
+
+/* import-globals-from /toolkit/content/preferencesBindings.js */
+
+document
+  .querySelector("dialog")
+  .addEventListener("dialoghelp", window.top.openPrefsHelp);
+
+Preferences.addAll([
+  { id: "privacy.clearOnShutdown.history", type: "bool" },
+  { id: "privacy.clearOnShutdown.formdata", type: "bool" },
+  { id: "privacy.clearOnShutdown.downloads", type: "bool" },
+  { id: "privacy.clearOnShutdown.cookies", type: "bool" },
+  { id: "privacy.clearOnShutdown.cache", type: "bool" },
+  { id: "privacy.clearOnShutdown.offlineApps", type: "bool" },
+  { id: "privacy.clearOnShutdown.sessions", type: "bool" },
+  { id: "privacy.clearOnShutdown.siteSettings", type: "bool" },
+]);
+
+var gSanitizeDialog = Object.freeze({
+  init() {
+    this.onClearHistoryChanged();
+
+    Preferences.get("privacy.clearOnShutdown.history").on(
+      "change",
+      this.onClearHistoryChanged.bind(this)
+    );
+  },
+
+  onClearHistoryChanged() {
+    let downloadsPref = Preferences.get("privacy.clearOnShutdown.downloads");
+    let historyPref = Preferences.get("privacy.clearOnShutdown.history");
+    downloadsPref.value = historyPref.value;
+  },
+});
diff --git a/browser/components/preferences/dialogs/sanitize.xhtml b/browser/components/preferences/dialogs/sanitize.xhtml
new file mode 100644
index 0000000000..cd2bea0649
--- /dev/null
+++ b/browser/components/preferences/dialogs/sanitize.xhtml
@@ -0,0 +1,94 @@
+<?xml version="1.0"?>
+
+<!-- -*- 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/. -->
+
+<!DOCTYPE window>
+
+<window
+  id="SanitizeDialog"
+  type="child"
+  xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"
+  xmlns:html="http://www.w3.org/1999/xhtml"
+  persist="lastSelected"
+  data-l10n-id="sanitize-prefs2"
+  data-l10n-attrs="style"
+  onload="gSanitizeDialog.init();"
+>
+  <dialog buttons="accept,cancel,help" helpTopic="prefs-clear-private-data">
+    <linkset>
+      <html:link rel="stylesheet" href="chrome://global/skin/global.css" />
+      <html:link
+        rel="stylesheet"
+        href="chrome://browser/skin/preferences/preferences.css"
+      />
+
+      <html:link rel="localization" href="browser/sanitize.ftl" />
+      <html:link rel="localization" href="branding/brand.ftl" />
+    </linkset>
+
+    <script src="chrome://browser/content/utilityOverlay.js" />
+    <script src="chrome://global/content/preferencesBindings.js" />
+
+    <keyset>
+      <key
+        data-l10n-id="window-close"
+        modifiers="accel"
+        oncommand="Preferences.close(event)"
+      />
+    </keyset>
+
+    <script src="chrome://browser/content/preferences/dialogs/sanitize.js" />
+
+    <description data-l10n-id="clear-data-settings-label"></description>
+
+    <groupbox>
+      <label><html:h2 data-l10n-id="history-section-label" /></label>
+      <hbox>
+        <vbox data-l10n-id="sanitize-prefs-style" data-l10n-attrs="style">
+          <checkbox
+            data-l10n-id="item-history-and-downloads"
+            preference="privacy.clearOnShutdown.history"
+          />
+          <checkbox
+            data-l10n-id="item-active-logins"
+            preference="privacy.clearOnShutdown.sessions"
+          />
+          <checkbox
+            data-l10n-id="item-form-search-history"
+            preference="privacy.clearOnShutdown.formdata"
+          />
+        </vbox>
+        <vbox>
+          <checkbox
+            data-l10n-id="item-cookies"
+            preference="privacy.clearOnShutdown.cookies"
+          />
+          <checkbox
+            data-l10n-id="item-cache"
+            preference="privacy.clearOnShutdown.cache"
+          />
+        </vbox>
+      </hbox>
+    </groupbox>
+    <groupbox>
+      <label><html:h2 data-l10n-id="data-section-label" /></label>
+      <hbox>
+        <vbox data-l10n-id="sanitize-prefs-style" data-l10n-attrs="style">
+          <checkbox
+            data-l10n-id="item-site-settings"
+            preference="privacy.clearOnShutdown.siteSettings"
+          />
+        </vbox>
+        <vbox flex="1">
+          <checkbox
+            data-l10n-id="item-offline-apps"
+            preference="privacy.clearOnShutdown.offlineApps"
+          />
+        </vbox>
+      </hbox>
+    </groupbox>
+  </dialog>
+</window>
diff --git a/browser/components/preferences/dialogs/selectBookmark.js b/browser/components/preferences/dialogs/selectBookmark.js
new file mode 100644
index 0000000000..5fe4c645e7
--- /dev/null
+++ b/browser/components/preferences/dialogs/selectBookmark.js
@@ -0,0 +1,119 @@
+//* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* 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/. */
+
+/* Shared Places Import - change other consumers if you change this: */
+var { XPCOMUtils } = ChromeUtils.importESModule(
+  "resource://gre/modules/XPCOMUtils.sys.mjs"
+);
+
+ChromeUtils.defineESModuleGetters(this, {
+  PlacesTransactions: "resource://gre/modules/PlacesTransactions.sys.mjs",
+  PlacesUIUtils: "resource:///modules/PlacesUIUtils.sys.mjs",
+  PlacesUtils: "resource://gre/modules/PlacesUtils.sys.mjs",
+  PrivateBrowsingUtils: "resource://gre/modules/PrivateBrowsingUtils.sys.mjs",
+});
+
+XPCOMUtils.defineLazyScriptGetter(
+  this,
+  "PlacesTreeView",
+  "chrome://browser/content/places/treeView.js"
+);
+XPCOMUtils.defineLazyScriptGetter(
+  this,
+  ["PlacesInsertionPoint", "PlacesController", "PlacesControllerDragHelper"],
+  "chrome://browser/content/places/controller.js"
+);
+/* End Shared Places Import */
+
+/**
+ * SelectBookmarkDialog controls the user interface for the "Use Bookmark for
+ * Home Page" dialog.
+ *
+ * The caller (gMainPane.setHomePageToBookmark in main.js) invokes this dialog
+ * with a single argument - a reference to an object with a .urls property and
+ * a .names property.  This dialog is responsible for updating the contents of
+ * the .urls property with an array of URLs to use as home pages and for
+ * updating the .names property with an array of names for those URLs before it
+ * closes.
+ */
+var SelectBookmarkDialog = {
+  init: function SBD_init() {
+    document.getElementById("bookmarks").place =
+      "place:type=" + Ci.nsINavHistoryQueryOptions.RESULTS_AS_ROOTS_QUERY;
+
+    // Initial update of the OK button.
+    this.selectionChanged();
+    document.addEventListener("dialogaccept", function () {
+      SelectBookmarkDialog.accept();
+    });
+  },
+
+  /**
+   * Update the disabled state of the OK button as the user changes the
+   * selection within the view.
+   */
+  selectionChanged: function SBD_selectionChanged() {
+    var accept = document
+      .getElementById("selectBookmarkDialog")
+      .getButton("accept");
+    var bookmarks = document.getElementById("bookmarks");
+    var disableAcceptButton = true;
+    if (bookmarks.hasSelection) {
+      if (!PlacesUtils.nodeIsSeparator(bookmarks.selectedNode)) {
+        disableAcceptButton = false;
+      }
+    }
+    accept.disabled = disableAcceptButton;
+  },
+
+  onItemDblClick: function SBD_onItemDblClick() {
+    var bookmarks = document.getElementById("bookmarks");
+    var selectedNode = bookmarks.selectedNode;
+    if (selectedNode && PlacesUtils.nodeIsURI(selectedNode)) {
+      /**
+       * The user has double clicked on a tree row that is a link. Take this to
+       * mean that they want that link to be their homepage, and close the dialog.
+       */
+      document
+        .getElementById("selectBookmarkDialog")
+        .getButton("accept")
+        .click();
+    }
+  },
+
+  /**
+   * User accepts their selection. Set all the selected URLs or the contents
+   * of the selected folder as the list of homepages.
+   */
+  accept: function SBD_accept() {
+    var bookmarks = document.getElementById("bookmarks");
+    if (!bookmarks.hasSelection) {
+      throw new Error(
+        "Should not be able to accept dialog if there is no selected URL!"
+      );
+    }
+    var urls = [];
+    var names = [];
+    var selectedNode = bookmarks.selectedNode;
+    if (PlacesUtils.nodeIsFolder(selectedNode)) {
+      let concreteGuid = PlacesUtils.getConcreteItemGuid(selectedNode);
+      var contents = PlacesUtils.getFolderContents(concreteGuid).root;
+      var cc = contents.childCount;
+      for (var i = 0; i < cc; ++i) {
+        var node = contents.getChild(i);
+        if (PlacesUtils.nodeIsURI(node)) {
+          urls.push(node.uri);
+          names.push(node.title);
+        }
+      }
+      contents.containerOpen = false;
+    } else {
+      urls.push(selectedNode.uri);
+      names.push(selectedNode.title);
+    }
+    window.arguments[0].urls = urls;
+    window.arguments[0].names = names;
+  },
+};
diff --git a/browser/components/preferences/dialogs/selectBookmark.xhtml b/browser/components/preferences/dialogs/selectBookmark.xhtml
new file mode 100644
index 0000000000..34317467bf
--- /dev/null
+++ b/browser/components/preferences/dialogs/selectBookmark.xhtml
@@ -0,0 +1,61 @@
+<?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/. -->
+
+<window
+  xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"
+  xmlns:html="http://www.w3.org/1999/xhtml"
+  data-l10n-id="select-bookmark-window2"
+  data-l10n-attrs="title, style"
+  persist="width height"
+  onload="SelectBookmarkDialog.init();"
+>
+  <dialog id="selectBookmarkDialog">
+    <linkset>
+      <html:link
+        rel="stylesheet"
+        href="chrome://browser/content/places/places.css"
+      />
+
+      <html:link rel="stylesheet" href="chrome://global/skin/global.css" />
+      <html:link
+        rel="stylesheet"
+        href="chrome://browser/skin/places/tree-icons.css"
+      />
+
+      <html:link
+        rel="localization"
+        href="browser/preferences/selectBookmark.ftl"
+      />
+    </linkset>
+
+    <script src="chrome://browser/content/preferences/dialogs/selectBookmark.js" />
+    <script src="chrome://global/content/globalOverlay.js" />
+    <script src="chrome://browser/content/utilityOverlay.js" />
+    <script src="chrome://browser/content/places/places-tree.js" />
+
+    <description data-l10n-id="select-bookmark-desc" />
+
+    <separator class="thin" />
+
+    <tree
+      id="bookmarks"
+      flex="1"
+      is="places-tree"
+      style="height: 15em"
+      hidecolumnpicker="true"
+      seltype="single"
+      ondblclick="SelectBookmarkDialog.onItemDblClick();"
+      onselect="SelectBookmarkDialog.selectionChanged();"
+      disableUserActions="true"
+    >
+      <treecols>
+        <treecol id="title" flex="1" primary="true" hideheader="true" />
+      </treecols>
+      <treechildren id="bookmarksChildren" flex="1" />
+    </tree>
+
+    <separator class="thin" />
+  </dialog>
+</window>
diff --git a/browser/components/preferences/dialogs/siteDataRemoveSelected.js b/browser/components/preferences/dialogs/siteDataRemoveSelected.js
new file mode 100644
index 0000000000..e722a2d826
--- /dev/null
+++ b/browser/components/preferences/dialogs/siteDataRemoveSelected.js
@@ -0,0 +1,56 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 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/. */
+
+"use strict";
+
+/**
+ * This dialog will ask the user to confirm that they really want to delete all
+ * site data for a number of hosts.
+ **/
+let gSiteDataRemoveSelected = {
+  init() {
+    document.addEventListener("dialogaccept", function () {
+      window.arguments[0].allowed = true;
+    });
+    document.addEventListener("dialogcancel", function () {
+      window.arguments[0].allowed = false;
+    });
+
+    let list = document.getElementById("removalList");
+
+    let hosts = window.arguments[0].hosts;
+
+    if (!hosts) {
+      throw new Error("Must specify hosts option in arguments.");
+    }
+    let dialog = document.getElementById("SiteDataRemoveSelectedDialog");
+    if (hosts.length == 1) {
+      dialog.classList.add("single-entry");
+      document.l10n.setAttributes(
+        document.getElementById("removing-description"),
+        "site-data-removing-single-desc",
+        {
+          baseDomain: hosts[0],
+        }
+      );
+      return;
+    }
+    dialog.classList.add("multi-entry");
+    hosts.sort();
+    let fragment = document.createDocumentFragment();
+    for (let host of hosts) {
+      let listItem = document.createXULElement("richlistitem");
+      let label = document.createXULElement("label");
+      if (host) {
+        label.setAttribute("value", host);
+      } else {
+        document.l10n.setAttributes(label, "site-data-local-file-host");
+      }
+      listItem.appendChild(label);
+      fragment.appendChild(listItem);
+    }
+    list.appendChild(fragment);
+  },
+};
diff --git a/browser/components/preferences/dialogs/siteDataRemoveSelected.xhtml b/browser/components/preferences/dialogs/siteDataRemoveSelected.xhtml
new file mode 100644
index 0000000000..7ab8391ce7
--- /dev/null
+++ b/browser/components/preferences/dialogs/siteDataRemoveSelected.xhtml
@@ -0,0 +1,51 @@
+<?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/. -->
+
+<window id="SiteDataRemoveSelectedDialog"
+        width="500"
+        data-l10n-id="site-data-removing-dialog"
+        data-l10n-attrs="title"
+        onload="gSiteDataRemoveSelected.init();"
+        xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"
+        xmlns:html="http://www.w3.org/1999/xhtml">
+<dialog data-l10n-id="site-data-removing-dialog"
+        data-l10n-attrs="buttonlabelaccept">
+
+  <linkset>
+    <html:link rel="stylesheet" href="chrome://global/skin/global.css" />
+    <html:link
+      rel="stylesheet"
+      href="chrome://browser/skin/preferences/siteDataSettings.css"
+    />
+
+    <html:link rel="localization" href="browser/preferences/siteDataSettings.ftl"/>
+  </linkset>
+
+  <hbox>
+    <vbox>
+      <image class="question-icon"/>
+    </vbox>
+    <vbox flex="1">
+      <!-- Only show this label on OS X because of no dialog title -->
+      <label id="removing-label"
+             data-l10n-id="site-data-removing-header"
+#ifndef XP_MACOSX
+             hidden="true"
+#endif
+      />
+      <separator class="thin"/>
+      <description id="removing-description" data-l10n-id="site-data-removing-desc"/>
+    </vbox>
+  </hbox>
+    <separator class="multi-site"/>
+
+    <label data-l10n-id="site-data-removing-table" class="multi-site"/>
+    <separator class="thin multi-site"/>
+    <richlistbox id="removalList" class="theme-listbox  multi-site" flex="1"/>
+  <!-- Load the script after the elements for layout issues (bug 1501755). -->
+  <script src="chrome://browser/content/preferences/dialogs/siteDataRemoveSelected.js"/>
+</dialog>
+</window>
diff --git a/browser/components/preferences/dialogs/siteDataSettings.js b/browser/components/preferences/dialogs/siteDataSettings.js
new file mode 100644
index 0000000000..5323a3cf3b
--- /dev/null
+++ b/browser/components/preferences/dialogs/siteDataSettings.js
@@ -0,0 +1,331 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 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/. */
+
+"use strict";
+
+var { AppConstants } = ChromeUtils.importESModule(
+  "resource://gre/modules/AppConstants.sys.mjs"
+);
+
+ChromeUtils.defineESModuleGetters(this, {
+  DownloadUtils: "resource://gre/modules/DownloadUtils.sys.mjs",
+  SiteDataManager: "resource:///modules/SiteDataManager.sys.mjs",
+});
+
+let gSiteDataSettings = {
+  // Array of metadata of sites. Each array element is object holding:
+  // - uri: uri of site; instance of nsIURI
+  // - baseDomain: base domain of the site
+  // - cookies: array of cookies of that site
+  // - usage: disk usage which site uses
+  // - userAction: "remove" or "update-permission"; the action user wants to take.
+  _sites: null,
+
+  _list: null,
+  _searchBox: null,
+
+  _createSiteListItem(site) {
+    let item = document.createXULElement("richlistitem");
+    item.setAttribute("host", site.baseDomain);
+    let container = document.createXULElement("hbox");
+
+    // Creates a new column item with the specified relative width.
+    function addColumnItem(l10n, flexWidth, tooltipText) {
+      let box = document.createXULElement("hbox");
+      box.className = "item-box";
+      box.setAttribute("style", `flex: ${flexWidth} ${flexWidth};`);
+      let label = document.createXULElement("label");
+      label.setAttribute("crop", "end");
+      if (l10n) {
+        if (l10n.hasOwnProperty("raw")) {
+          box.setAttribute("tooltiptext", l10n.raw);
+          label.setAttribute("value", l10n.raw);
+        } else {
+          document.l10n.setAttributes(label, l10n.id, l10n.args);
+        }
+      }
+      if (tooltipText) {
+        box.setAttribute("tooltiptext", tooltipText);
+      }
+      box.appendChild(label);
+      container.appendChild(box);
+    }
+
+    // Add "Host" column.
+    let hostData = site.baseDomain
+      ? { raw: site.baseDomain }
+      : { id: "site-data-local-file-host" };
+    addColumnItem(hostData, "4");
+
+    // Add "Cookies" column.
+    addColumnItem({ raw: site.cookies.length }, "1");
+
+    // Add "Storage" column
+    if (site.usage > 0 || site.persisted) {
+      let [value, unit] = DownloadUtils.convertByteUnits(site.usage);
+      let strName = site.persisted
+        ? "site-storage-persistent"
+        : "site-storage-usage";
+      addColumnItem(
+        {
+          id: strName,
+          args: { value, unit },
+        },
+        "2"
+      );
+    } else {
+      // Pass null to avoid showing "0KB" when there is no site data stored.
+      addColumnItem(null, "2");
+    }
+
+    // Add "Last Used" column.
+    let formattedLastAccessed =
+      site.lastAccessed > 0
+        ? this._relativeTimeFormat.formatBestUnit(site.lastAccessed)
+        : null;
+    let formattedFullDate =
+      site.lastAccessed > 0
+        ? this._absoluteTimeFormat.format(site.lastAccessed)
+        : null;
+    addColumnItem(
+      site.lastAccessed > 0 ? { raw: formattedLastAccessed } : null,
+      "2",
+      formattedFullDate
+    );
+
+    item.appendChild(container);
+    return item;
+  },
+
+  init() {
+    function setEventListener(id, eventType, callback) {
+      document
+        .getElementById(id)
+        .addEventListener(eventType, callback.bind(gSiteDataSettings));
+    }
+
+    this._absoluteTimeFormat = new Services.intl.DateTimeFormat(undefined, {
+      dateStyle: "short",
+      timeStyle: "short",
+    });
+
+    this._relativeTimeFormat = new Services.intl.RelativeTimeFormat(
+      undefined,
+      {}
+    );
+
+    this._list = document.getElementById("sitesList");
+    this._searchBox = document.getElementById("searchBox");
+    SiteDataManager.getSites().then(sites => {
+      this._sites = sites;
+      let sortCol = document.querySelector(
+        "treecol[data-isCurrentSortCol=true]"
+      );
+      this._sortSites(this._sites, sortCol);
+      this._buildSitesList(this._sites);
+      Services.obs.notifyObservers(null, "sitedata-settings-init");
+    });
+
+    setEventListener("sitesList", "select", this.onSelect);
+    setEventListener("hostCol", "click", this.onClickTreeCol);
+    setEventListener("usageCol", "click", this.onClickTreeCol);
+    setEventListener("lastAccessedCol", "click", this.onClickTreeCol);
+    setEventListener("cookiesCol", "click", this.onClickTreeCol);
+    setEventListener("searchBox", "command", this.onCommandSearch);
+    setEventListener("removeAll", "command", this.onClickRemoveAll);
+    setEventListener("removeSelected", "command", this.removeSelected);
+
+    document.addEventListener("dialogaccept", e => this.saveChanges(e));
+  },
+
+  _updateButtonsState() {
+    let items = this._list.getElementsByTagName("richlistitem");
+    let removeSelectedBtn = document.getElementById("removeSelected");
+    let removeAllBtn = document.getElementById("removeAll");
+    removeSelectedBtn.disabled = !this._list.selectedItems.length;
+    removeAllBtn.disabled = !items.length;
+
+    let l10nId = this._searchBox.value
+      ? "site-data-remove-shown"
+      : "site-data-remove-all";
+    document.l10n.setAttributes(removeAllBtn, l10nId);
+  },
+
+  /**
+   * @param sites {Array}
+   * @param col {XULElement} the <treecol> being sorted on
+   */
+  _sortSites(sites, col) {
+    let isCurrentSortCol = col.getAttribute("data-isCurrentSortCol");
+    let sortDirection =
+      col.getAttribute("data-last-sortDirection") || "ascending";
+    if (isCurrentSortCol) {
+      // Sort on the current column, flip the sorting direction
+      sortDirection =
+        sortDirection === "ascending" ? "descending" : "ascending";
+    }
+
+    let sortFunc = null;
+    switch (col.id) {
+      case "hostCol":
+        sortFunc = (a, b) => {
+          let aHost = a.baseDomain.toLowerCase();
+          let bHost = b.baseDomain.toLowerCase();
+          return aHost.localeCompare(bHost);
+        };
+        break;
+
+      case "cookiesCol":
+        sortFunc = (a, b) => a.cookies.length - b.cookies.length;
+        break;
+
+      case "usageCol":
+        sortFunc = (a, b) => a.usage - b.usage;
+        break;
+
+      case "lastAccessedCol":
+        sortFunc = (a, b) => a.lastAccessed - b.lastAccessed;
+        break;
+    }
+    if (sortDirection === "descending") {
+      sites.sort((a, b) => sortFunc(b, a));
+    } else {
+      sites.sort(sortFunc);
+    }
+
+    let cols = this._list.previousElementSibling.querySelectorAll("treecol");
+    cols.forEach(c => {
+      c.removeAttribute("sortDirection");
+      c.removeAttribute("data-isCurrentSortCol");
+    });
+    col.setAttribute("data-isCurrentSortCol", true);
+    col.setAttribute("sortDirection", sortDirection);
+    col.setAttribute("data-last-sortDirection", sortDirection);
+  },
+
+  /**
+   * @param sites {Array} array of metadata of sites
+   */
+  _buildSitesList(sites) {
+    // Clear old entries.
+    let oldItems = this._list.querySelectorAll("richlistitem");
+    for (let item of oldItems) {
+      item.remove();
+    }
+
+    let keyword = this._searchBox.value.toLowerCase().trim();
+    let fragment = document.createDocumentFragment();
+    for (let site of sites) {
+      if (keyword && !site.baseDomain.includes(keyword)) {
+        continue;
+      }
+
+      if (site.userAction === "remove") {
+        continue;
+      }
+
+      let item = this._createSiteListItem(site);
+      fragment.appendChild(item);
+    }
+    this._list.appendChild(fragment);
+    this._updateButtonsState();
+  },
+
+  _removeSiteItems(items) {
+    for (let i = items.length - 1; i >= 0; --i) {
+      let item = items[i];
+      let baseDomain = item.getAttribute("host");
+      let siteForBaseDomain = this._sites.find(
+        site => site.baseDomain == baseDomain
+      );
+      if (siteForBaseDomain) {
+        siteForBaseDomain.userAction = "remove";
+      }
+      item.remove();
+    }
+    this._updateButtonsState();
+  },
+
+  async saveChanges(event) {
+    let removals = this._sites
+      .filter(site => site.userAction == "remove")
+      .map(site => site.baseDomain);
+
+    if (removals.length) {
+      let removeAll = removals.length == this._sites.length;
+      let promptArg = removeAll ? undefined : removals;
+      if (!SiteDataManager.promptSiteDataRemoval(window, promptArg)) {
+        // If the user cancelled the confirm dialog keep the site data window open,
+        // they can still press cancel again to exit.
+        event.preventDefault();
+        return;
+      }
+      try {
+        if (removeAll) {
+          await SiteDataManager.removeAll();
+        } else {
+          await SiteDataManager.remove(removals);
+        }
+      } catch (e) {
+        console.error(e);
+      }
+    }
+  },
+
+  removeSelected() {
+    let lastIndex = this._list.selectedItems.length - 1;
+    let lastSelectedItem = this._list.selectedItems[lastIndex];
+    let lastSelectedItemPosition = this._list.getIndexOfItem(lastSelectedItem);
+    let nextSelectedItem = this._list.getItemAtIndex(
+      lastSelectedItemPosition + 1
+    );
+
+    this._removeSiteItems(this._list.selectedItems);
+    this._list.clearSelection();
+
+    if (nextSelectedItem) {
+      this._list.selectedItem = nextSelectedItem;
+    } else {
+      this._list.selectedIndex = this._list.itemCount - 1;
+    }
+  },
+
+  onClickTreeCol(e) {
+    this._sortSites(this._sites, e.target);
+    this._buildSitesList(this._sites);
+    this._list.clearSelection();
+  },
+
+  onCommandSearch() {
+    this._buildSitesList(this._sites);
+    this._list.clearSelection();
+  },
+
+  onClickRemoveAll() {
+    let siteItems = this._list.getElementsByTagName("richlistitem");
+    if (siteItems.length) {
+      this._removeSiteItems(siteItems);
+    }
+  },
+
+  onKeyPress(e) {
+    if (
+      e.keyCode == KeyEvent.DOM_VK_DELETE ||
+      (AppConstants.platform == "macosx" &&
+        e.keyCode == KeyEvent.DOM_VK_BACK_SPACE)
+    ) {
+      if (!e.target.closest("#sitesList")) {
+        // The user is typing or has not selected an item from the list to remove
+        return;
+      }
+      // The users intention is to delete site data
+      this.removeSelected();
+    }
+  },
+
+  onSelect() {
+    this._updateButtonsState();
+  },
+};
diff --git a/browser/components/preferences/dialogs/siteDataSettings.xhtml b/browser/components/preferences/dialogs/siteDataSettings.xhtml
new file mode 100644
index 0000000000..56c8238864
--- /dev/null
+++ b/browser/components/preferences/dialogs/siteDataSettings.xhtml
@@ -0,0 +1,92 @@
+<?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/. -->
+
+<window
+  id="SiteDataSettingsDialog"
+  data-l10n-id="site-data-settings-window"
+  data-l10n-attrs="title"
+  xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"
+  xmlns:html="http://www.w3.org/1999/xhtml"
+  style="min-width: 45em"
+  onload="gSiteDataSettings.init();"
+  onkeypress="gSiteDataSettings.onKeyPress(event);"
+  persist="width height"
+>
+  <dialog
+    buttons="accept,cancel"
+    data-l10n-id="site-data-settings-dialog"
+    data-l10n-attrs="buttonlabelaccept, buttonaccesskeyaccept"
+  >
+    <linkset>
+      <html:link rel="stylesheet" href="chrome://global/skin/global.css" />
+      <html:link
+        rel="stylesheet"
+        href="chrome://browser/skin/preferences/preferences.css"
+      />
+      <html:link
+        rel="stylesheet"
+        href="chrome://browser/skin/preferences/siteDataSettings.css"
+      />
+
+      <html:link rel="localization" href="branding/brand.ftl" />
+      <html:link
+        rel="localization"
+        href="browser/preferences/siteDataSettings.ftl"
+      />
+    </linkset>
+
+    <script src="chrome://browser/content/preferences/dialogs/siteDataSettings.js" />
+
+    <vbox flex="1" class="contentPane">
+      <description
+        id="settingsDescription"
+        data-l10n-id="site-data-settings-description"
+      />
+      <separator class="thin" />
+
+      <hbox id="searchBoxContainer">
+        <search-textbox
+          id="searchBox"
+          flex="1"
+          data-l10n-id="site-data-search-textbox"
+          data-l10n-attrs="placeholder"
+        />
+      </hbox>
+      <separator class="thin" />
+
+      <listheader>
+        <treecol
+          style="flex: 4 4 auto; width: 50px"
+          data-l10n-id="site-data-column-host"
+          id="hostCol"
+        />
+        <treecol
+          style="flex: 1 auto; width: 50px"
+          data-l10n-id="site-data-column-cookies"
+          id="cookiesCol"
+        />
+        <!-- Sorted by usage so the user can quickly see which sites use the most data. -->
+        <treecol
+          style="flex: 2 2 auto; width: 50px"
+          data-l10n-id="site-data-column-storage"
+          id="usageCol"
+          data-isCurrentSortCol="true"
+        />
+        <treecol
+          style="flex: 2 2 auto; width: 50px"
+          data-l10n-id="site-data-column-last-used"
+          id="lastAccessedCol"
+        />
+      </listheader>
+      <richlistbox seltype="multiple" id="sitesList" orient="vertical" />
+    </vbox>
+
+    <hbox align="start">
+      <button id="removeSelected" data-l10n-id="site-data-remove-selected" />
+      <button id="removeAll" />
+    </hbox>
+  </dialog>
+</window>
diff --git a/browser/components/preferences/dialogs/sitePermissions.css b/browser/components/preferences/dialogs/sitePermissions.css
new file mode 100644
index 0000000000..f9b7b447c7
--- /dev/null
+++ b/browser/components/preferences/dialogs/sitePermissions.css
@@ -0,0 +1,58 @@
+/* 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/. */
+
+.website-name,
+label.website-status {
+  overflow: hidden;
+  text-overflow: ellipsis;
+  padding-inline-start: 7px;
+}
+
+#permissionsBox {
+  flex: 1 auto;
+  height: 18em;
+  min-height: 70px; /* 2 * 35px, which is the min row height specified below */
+}
+
+#siteCol,
+#statusCol,
+#permissionsBox > richlistitem {
+  min-height: 35px;
+}
+
+#permissionsBox > richlistitem > hbox {
+  flex: 1;
+  align-items: center;
+}
+
+#siteCol,
+.website-name {
+  flex: 1;
+  width: 0; /* Don't make our intrinsic size affect our final size */
+}
+
+#statusCol,
+.website-status {
+  width: 35%;
+}
+
+menulist.website-status {
+  margin-block: 1px;
+  margin-inline: 0 5px;
+  width: calc(35% - 5px);
+}
+
+#browserNotificationsPermissionExtensionContent,
+#permissionsDisableDescription {
+  margin-inline-start: 32px;
+}
+
+#permissionsDisableDescription {
+  color: var(--text-color-deemphasized);
+}
+
+#permissionsDisableCheckbox {
+  margin-inline-start: 4px;
+  padding-top: 10px;
+}
diff --git a/browser/components/preferences/dialogs/sitePermissions.js b/browser/components/preferences/dialogs/sitePermissions.js
new file mode 100644
index 0000000000..e23706a01d
--- /dev/null
+++ b/browser/components/preferences/dialogs/sitePermissions.js
@@ -0,0 +1,679 @@
+/* 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-globals-from ../extensionControlled.js */
+
+var { AppConstants } = ChromeUtils.importESModule(
+  "resource://gre/modules/AppConstants.sys.mjs"
+);
+const { SitePermissions } = ChromeUtils.importESModule(
+  "resource:///modules/SitePermissions.sys.mjs"
+);
+
+const sitePermissionsL10n = {
+  "desktop-notification": {
+    window: "permissions-site-notification-window2",
+    description: "permissions-site-notification-desc",
+    disableLabel: "permissions-site-notification-disable-label",
+    disableDescription: "permissions-site-notification-disable-desc",
+  },
+  geo: {
+    window: "permissions-site-location-window2",
+    description: "permissions-site-location-desc",
+    disableLabel: "permissions-site-location-disable-label",
+    disableDescription: "permissions-site-location-disable-desc",
+  },
+  xr: {
+    window: "permissions-site-xr-window2",
+    description: "permissions-site-xr-desc",
+    disableLabel: "permissions-site-xr-disable-label",
+    disableDescription: "permissions-site-xr-disable-desc",
+  },
+  camera: {
+    window: "permissions-site-camera-window2",
+    description: "permissions-site-camera-desc",
+    disableLabel: "permissions-site-camera-disable-label",
+    disableDescription: "permissions-site-camera-disable-desc",
+  },
+  microphone: {
+    window: "permissions-site-microphone-window2",
+    description: "permissions-site-microphone-desc",
+    disableLabel: "permissions-site-microphone-disable-label",
+    disableDescription: "permissions-site-microphone-disable-desc",
+  },
+  speaker: {
+    window: "permissions-site-speaker-window",
+    description: "permissions-site-speaker-desc",
+  },
+  "autoplay-media": {
+    window: "permissions-site-autoplay-window2",
+    description: "permissions-site-autoplay-desc",
+  },
+};
+
+const sitePermissionsConfig = {
+  "autoplay-media": {
+    _getCapabilityString(capability) {
+      switch (capability) {
+        case SitePermissions.ALLOW:
+          return "permissions-capabilities-autoplay-allow";
+        case SitePermissions.BLOCK:
+          return "permissions-capabilities-autoplay-block";
+        case SitePermissions.AUTOPLAY_BLOCKED_ALL:
+          return "permissions-capabilities-autoplay-blockall";
+      }
+      throw new Error(`Unknown capability: ${capability}`);
+    },
+  },
+};
+
+// A set of permissions for a single origin.  One PermissionGroup instance
+// corresponds to one row in the gSitePermissionsManager._list richlistbox.
+// Permissions may be single or double keyed, but the primary key of all
+// permissions matches the permission type of the dialog.
+class PermissionGroup {
+  #changedCapability;
+
+  constructor(perm) {
+    this.principal = perm.principal;
+    this.origin = perm.principal.origin;
+    this.perms = [perm];
+  }
+  addPermission(perm) {
+    this.perms.push(perm);
+  }
+  removePermission(perm) {
+    this.perms = this.perms.filter(p => p.type != perm.type);
+  }
+  set capability(cap) {
+    this.#changedCapability = cap;
+  }
+  get capability() {
+    if (this.#changedCapability) {
+      return this.#changedCapability;
+    }
+    return this.savedCapability;
+  }
+  revert() {
+    this.#changedCapability = null;
+  }
+  get savedCapability() {
+    // This logic to present a single capability for permissions of different
+    // keys and capabilities caters for speaker-selection, where a block
+    // permission may be set for all devices with no second key, which would
+    // override any device-specific double-keyed allow permissions.
+    let cap;
+    for (let perm of this.perms) {
+      let [type] = perm.type.split(SitePermissions.PERM_KEY_DELIMITER);
+      if (type == perm.type) {
+        // No second key.  This overrides double-keyed perms.
+        return perm.capability;
+      }
+      // Double-keyed perms are not expected to have different capabilities.
+      cap = perm.capability;
+    }
+    return cap;
+  }
+}
+
+const PERMISSION_STATES = [
+  SitePermissions.ALLOW,
+  SitePermissions.BLOCK,
+  SitePermissions.PROMPT,
+  SitePermissions.AUTOPLAY_BLOCKED_ALL,
+];
+
+const NOTIFICATIONS_PERMISSION_OVERRIDE_KEY = "webNotificationsDisabled";
+const NOTIFICATIONS_PERMISSION_PREF =
+  "permissions.default.desktop-notification";
+
+const AUTOPLAY_PREF = "media.autoplay.default";
+
+var gSitePermissionsManager = {
+  _type: "",
+  _isObserving: false,
+  _permissionGroups: new Map(),
+  _permissionsToChange: new Map(),
+  _permissionsToDelete: new Map(),
+  _list: null,
+  _removeButton: null,
+  _removeAllButton: null,
+  _searchBox: null,
+  _checkbox: null,
+  _currentDefaultPermissionsState: null,
+  _defaultPermissionStatePrefName: null,
+
+  onLoad() {
+    let params = window.arguments[0];
+    document.mozSubdialogReady = this.init(params);
+  },
+
+  async init(params) {
+    if (!this._isObserving) {
+      Services.obs.addObserver(this, "perm-changed");
+      this._isObserving = true;
+    }
+
+    document.addEventListener("dialogaccept", () => this.onApplyChanges());
+
+    this._type = params.permissionType;
+    this._list = document.getElementById("permissionsBox");
+    this._removeButton = document.getElementById("removePermission");
+    this._removeAllButton = document.getElementById("removeAllPermissions");
+    this._searchBox = document.getElementById("searchBox");
+    this._checkbox = document.getElementById("permissionsDisableCheckbox");
+    this._disableExtensionButton = document.getElementById(
+      "disableNotificationsPermissionExtension"
+    );
+    this._permissionsDisableDescription = document.getElementById(
+      "permissionsDisableDescription"
+    );
+    this._setAutoplayPref = document.getElementById("setAutoplayPref");
+
+    let permissionsText = document.getElementById("permissionsText");
+
+    document.l10n.pauseObserving();
+    let l10n = sitePermissionsL10n[this._type];
+    document.l10n.setAttributes(permissionsText, l10n.description);
+    if (l10n.disableLabel) {
+      document.l10n.setAttributes(this._checkbox, l10n.disableLabel);
+    }
+    if (l10n.disableDescription) {
+      document.l10n.setAttributes(
+        this._permissionsDisableDescription,
+        l10n.disableDescription
+      );
+    }
+    document.l10n.setAttributes(document.documentElement, l10n.window);
+
+    await document.l10n.translateElements([
+      permissionsText,
+      this._checkbox,
+      this._permissionsDisableDescription,
+      document.documentElement,
+    ]);
+    document.l10n.resumeObserving();
+
+    // Initialize the checkbox state and handle showing notification permission UI
+    // when it is disabled by an extension.
+    this._defaultPermissionStatePrefName = "permissions.default." + this._type;
+    this._watchPermissionPrefChange();
+
+    this._loadPermissions();
+    this.buildPermissionsList();
+
+    if (params.permissionType == "autoplay-media") {
+      await this.buildAutoplayMenulist();
+      this._setAutoplayPref.hidden = false;
+    }
+
+    this._searchBox.focus();
+  },
+
+  uninit() {
+    if (this._isObserving) {
+      Services.obs.removeObserver(this, "perm-changed");
+      this._isObserving = false;
+    }
+    if (this._setAutoplayPref) {
+      this._setAutoplayPref.hidden = true;
+    }
+  },
+
+  observe(subject, topic, data) {
+    if (topic !== "perm-changed") {
+      return;
+    }
+
+    let permission = subject.QueryInterface(Ci.nsIPermission);
+    let [type] = permission.type.split(SitePermissions.PERM_KEY_DELIMITER);
+
+    // Ignore unrelated permission types and permissions with unknown states.
+    if (
+      type !== this._type ||
+      !PERMISSION_STATES.includes(permission.capability)
+    ) {
+      return;
+    }
+
+    if (data == "added") {
+      this._addPermissionToList(permission);
+    } else {
+      let group = this._permissionGroups.get(permission.principal.origin);
+      if (!group) {
+        // already moved to _permissionsToDelete
+        // or private browsing session permission
+        return;
+      }
+      if (data == "changed") {
+        group.removePermission(permission);
+        group.addPermission(permission);
+      } else if (data == "deleted") {
+        group.removePermission(permission);
+        if (!group.perms.length) {
+          this._removePermissionFromList(permission.principal.origin);
+          return;
+        }
+      }
+    }
+    this.buildPermissionsList();
+  },
+
+  _handleCheckboxUIUpdates() {
+    let pref = Services.prefs.getPrefType(this._defaultPermissionStatePrefName);
+    if (pref != Services.prefs.PREF_INVALID) {
+      this._currentDefaultPermissionsState = Services.prefs.getIntPref(
+        this._defaultPermissionStatePrefName
+      );
+    }
+
+    if (this._currentDefaultPermissionsState === null) {
+      this._checkbox.hidden = true;
+      this._permissionsDisableDescription.hidden = true;
+    } else if (this._currentDefaultPermissionsState == SitePermissions.BLOCK) {
+      this._checkbox.checked = true;
+    } else {
+      this._checkbox.checked = false;
+    }
+
+    if (Services.prefs.prefIsLocked(this._defaultPermissionStatePrefName)) {
+      this._checkbox.disabled = true;
+    }
+  },
+
+  /**
+   * Listen for changes to the permissions.default.* pref and make
+   * necessary changes to the UI.
+   */
+  _watchPermissionPrefChange() {
+    this._handleCheckboxUIUpdates();
+
+    if (this._type == "desktop-notification") {
+      this._handleWebNotificationsDisable();
+
+      this._disableExtensionButton.addEventListener(
+        "command",
+        makeDisableControllingExtension(
+          PREF_SETTING_TYPE,
+          NOTIFICATIONS_PERMISSION_OVERRIDE_KEY
+        )
+      );
+    }
+
+    let observer = () => {
+      this._handleCheckboxUIUpdates();
+      if (this._type == "desktop-notification") {
+        this._handleWebNotificationsDisable();
+      }
+    };
+    Services.prefs.addObserver(this._defaultPermissionStatePrefName, observer);
+    window.addEventListener("unload", () => {
+      Services.prefs.removeObserver(
+        this._defaultPermissionStatePrefName,
+        observer
+      );
+    });
+  },
+
+  /**
+   * Handles the UI update for web notifications disable by extensions.
+   */
+  async _handleWebNotificationsDisable() {
+    let prefLocked = Services.prefs.prefIsLocked(NOTIFICATIONS_PERMISSION_PREF);
+    if (prefLocked) {
+      // An extension can't control these settings if they're locked.
+      hideControllingExtension(NOTIFICATIONS_PERMISSION_OVERRIDE_KEY);
+    } else {
+      let isControlled = await handleControllingExtension(
+        PREF_SETTING_TYPE,
+        NOTIFICATIONS_PERMISSION_OVERRIDE_KEY
+      );
+      this._checkbox.disabled = isControlled;
+    }
+  },
+
+  _getCapabilityL10nId(element, type, capability) {
+    if (
+      type in sitePermissionsConfig &&
+      sitePermissionsConfig[type]._getCapabilityString
+    ) {
+      return sitePermissionsConfig[type]._getCapabilityString(capability);
+    }
+    switch (element.tagName) {
+      case "menuitem":
+        switch (capability) {
+          case Services.perms.ALLOW_ACTION:
+            return "permissions-capabilities-allow";
+          case Services.perms.DENY_ACTION:
+            return "permissions-capabilities-block";
+          case Services.perms.PROMPT_ACTION:
+            return "permissions-capabilities-prompt";
+          default:
+            throw new Error(`Unknown capability: ${capability}`);
+        }
+      case "label":
+        switch (capability) {
+          case Services.perms.ALLOW_ACTION:
+            return "permissions-capabilities-listitem-allow";
+          case Services.perms.DENY_ACTION:
+            return "permissions-capabilities-listitem-block";
+          default:
+            throw new Error(`Unexpected capability: ${capability}`);
+        }
+      default:
+        throw new Error(`Unexpected tag: ${element.tagName}`);
+    }
+  },
+
+  _addPermissionToList(perm) {
+    let [type] = perm.type.split(SitePermissions.PERM_KEY_DELIMITER);
+    // Ignore unrelated permission types and permissions with unknown states.
+    if (
+      type !== this._type ||
+      !PERMISSION_STATES.includes(perm.capability) ||
+      // Skip private browsing session permissions
+      (perm.principal.privateBrowsingId !==
+        Services.scriptSecurityManager.DEFAULT_PRIVATE_BROWSING_ID &&
+        perm.expireType === Services.perms.EXPIRE_SESSION)
+    ) {
+      return;
+    }
+    let group = this._permissionGroups.get(perm.principal.origin);
+    if (group) {
+      group.addPermission(perm);
+    } else {
+      group = new PermissionGroup(perm);
+      this._permissionGroups.set(group.origin, group);
+    }
+  },
+
+  _removePermissionFromList(origin) {
+    this._permissionGroups.delete(origin);
+    this._permissionsToChange.delete(origin);
+    let permissionlistitem = document.getElementsByAttribute(
+      "origin",
+      origin
+    )[0];
+    if (permissionlistitem) {
+      permissionlistitem.remove();
+    }
+  },
+
+  _loadPermissions() {
+    // load permissions into a table.
+    for (let nextPermission of Services.perms.all) {
+      this._addPermissionToList(nextPermission);
+    }
+  },
+
+  _createPermissionListItem(permissionGroup) {
+    let richlistitem = document.createXULElement("richlistitem");
+    richlistitem.setAttribute("origin", permissionGroup.origin);
+    let row = document.createXULElement("hbox");
+
+    let website = document.createXULElement("label");
+    website.textContent = permissionGroup.origin;
+    website.className = "website-name";
+
+    let states = SitePermissions.getAvailableStates(this._type).filter(
+      state => state != SitePermissions.UNKNOWN
+    );
+    // Handle the cases of a double-keyed ALLOW permission or a PROMPT
+    // permission after the default has been changed back to UNKNOWN.
+    if (!states.includes(permissionGroup.savedCapability)) {
+      states.unshift(permissionGroup.savedCapability);
+    }
+    let siteStatus;
+    if (states.length == 1) {
+      // Only a single state is available.  Show a label.
+      siteStatus = document.createXULElement("label");
+      document.l10n.setAttributes(
+        siteStatus,
+        this._getCapabilityL10nId(
+          siteStatus,
+          this._type,
+          permissionGroup.capability
+        )
+      );
+    } else {
+      // Multiple states are available.  Show a menulist.
+      siteStatus = document.createXULElement("menulist");
+      for (let state of states) {
+        let m = siteStatus.appendItem(undefined, state);
+        document.l10n.setAttributes(
+          m,
+          this._getCapabilityL10nId(m, this._type, state)
+        );
+      }
+      siteStatus.addEventListener("select", () => {
+        this.onPermissionChange(permissionGroup, Number(siteStatus.value));
+      });
+    }
+    siteStatus.className = "website-status";
+    siteStatus.value = permissionGroup.capability;
+
+    row.appendChild(website);
+    row.appendChild(siteStatus);
+    richlistitem.appendChild(row);
+    return richlistitem;
+  },
+
+  onPermissionKeyPress(event) {
+    if (!this._list.selectedItem) {
+      return;
+    }
+
+    if (
+      event.keyCode == KeyEvent.DOM_VK_DELETE ||
+      (AppConstants.platform == "macosx" &&
+        event.keyCode == KeyEvent.DOM_VK_BACK_SPACE)
+    ) {
+      this.onPermissionDelete();
+      event.preventDefault();
+    }
+  },
+
+  _setRemoveButtonState() {
+    if (!this._list) {
+      return;
+    }
+
+    let hasSelection = this._list.selectedIndex >= 0;
+    let hasRows = this._list.itemCount > 0;
+    this._removeButton.disabled = !hasSelection;
+    this._removeAllButton.disabled = !hasRows;
+  },
+
+  onPermissionDelete() {
+    let richlistitem = this._list.selectedItem;
+    let origin = richlistitem.getAttribute("origin");
+    let permissionGroup = this._permissionGroups.get(origin);
+
+    this._removePermissionFromList(origin);
+    this._permissionsToDelete.set(permissionGroup.origin, permissionGroup);
+
+    this._setRemoveButtonState();
+  },
+
+  onAllPermissionsDelete() {
+    for (let permissionGroup of this._permissionGroups.values()) {
+      this._removePermissionFromList(permissionGroup.origin);
+      this._permissionsToDelete.set(permissionGroup.origin, permissionGroup);
+    }
+
+    this._setRemoveButtonState();
+  },
+
+  onPermissionSelect() {
+    this._setRemoveButtonState();
+  },
+
+  onPermissionChange(perm, capability) {
+    let group = this._permissionGroups.get(perm.origin);
+    if (group.capability == capability) {
+      return;
+    }
+    if (capability == group.savedCapability) {
+      group.revert();
+      this._permissionsToChange.delete(group.origin);
+    } else {
+      group.capability = capability;
+      this._permissionsToChange.set(group.origin, group);
+    }
+
+    // enable "remove all" button as needed
+    this._setRemoveButtonState();
+  },
+
+  onApplyChanges() {
+    // Stop observing permission changes since we are about
+    // to write out the pending adds/deletes and don't need
+    // to update the UI
+    this.uninit();
+
+    // Delete even _permissionsToChange to clear out double-keyed permissions
+    for (let group of [
+      ...this._permissionsToDelete.values(),
+      ...this._permissionsToChange.values(),
+    ]) {
+      for (let perm of group.perms) {
+        SitePermissions.removeFromPrincipal(perm.principal, perm.type);
+      }
+    }
+
+    for (let group of this._permissionsToChange.values()) {
+      SitePermissions.setForPrincipal(
+        group.principal,
+        this._type,
+        group.capability
+      );
+    }
+
+    if (this._checkbox.checked) {
+      Services.prefs.setIntPref(
+        this._defaultPermissionStatePrefName,
+        SitePermissions.BLOCK
+      );
+    } else if (this._currentDefaultPermissionsState == SitePermissions.BLOCK) {
+      Services.prefs.setIntPref(
+        this._defaultPermissionStatePrefName,
+        SitePermissions.UNKNOWN
+      );
+    }
+  },
+
+  buildPermissionsList(sortCol) {
+    // Clear old entries.
+    let oldItems = this._list.querySelectorAll("richlistitem");
+    for (let item of oldItems) {
+      item.remove();
+    }
+    let frag = document.createDocumentFragment();
+
+    let permissionGroups = Array.from(this._permissionGroups.values());
+
+    let keyword = this._searchBox.value.toLowerCase().trim();
+    for (let permissionGroup of permissionGroups) {
+      if (keyword && !permissionGroup.origin.includes(keyword)) {
+        continue;
+      }
+
+      let richlistitem = this._createPermissionListItem(permissionGroup);
+      frag.appendChild(richlistitem);
+    }
+
+    // Sort permissions.
+    this._sortPermissions(this._list, frag, sortCol);
+
+    this._list.appendChild(frag);
+
+    this._setRemoveButtonState();
+  },
+
+  async buildAutoplayMenulist() {
+    let menulist = document.createXULElement("menulist");
+    let states = SitePermissions.getAvailableStates("autoplay-media");
+    document.l10n.pauseObserving();
+    for (let state of states) {
+      let m = menulist.appendItem(undefined, state);
+      document.l10n.setAttributes(
+        m,
+        this._getCapabilityL10nId(m, "autoplay-media", state)
+      );
+    }
+
+    menulist.value = SitePermissions.getDefault("autoplay-media");
+
+    menulist.addEventListener("select", () => {
+      SitePermissions.setDefault("autoplay-media", Number(menulist.value));
+    });
+
+    menulist.menupopup.setAttribute("incontentshell", "false");
+
+    menulist.disabled = Services.prefs.prefIsLocked(AUTOPLAY_PREF);
+
+    document.getElementById("setAutoplayPref").appendChild(menulist);
+    await document.l10n.translateFragment(menulist);
+    document.l10n.resumeObserving();
+  },
+
+  _sortPermissions(list, frag, column) {
+    let sortDirection;
+
+    if (!column) {
+      column = document.querySelector("treecol[data-isCurrentSortCol=true]");
+      sortDirection =
+        column.getAttribute("data-last-sortDirection") || "ascending";
+    } else {
+      sortDirection = column.getAttribute("data-last-sortDirection");
+      sortDirection =
+        sortDirection === "ascending" ? "descending" : "ascending";
+    }
+
+    let sortFunc = null;
+    switch (column.id) {
+      case "siteCol":
+        sortFunc = (a, b) => {
+          return comp.compare(
+            a.getAttribute("origin"),
+            b.getAttribute("origin")
+          );
+        };
+        break;
+
+      case "statusCol":
+        sortFunc = (a, b) => {
+          return (
+            parseInt(a.querySelector(".website-status").value) >
+            parseInt(b.querySelector(".website-status").value)
+          );
+        };
+        break;
+    }
+
+    let comp = new Services.intl.Collator(undefined, {
+      usage: "sort",
+    });
+
+    let items = Array.from(frag.querySelectorAll("richlistitem"));
+
+    if (sortDirection === "descending") {
+      items.sort((a, b) => sortFunc(b, a));
+    } else {
+      items.sort(sortFunc);
+    }
+
+    // Re-append items in the correct order:
+    items.forEach(item => frag.appendChild(item));
+
+    let cols = list.previousElementSibling.querySelectorAll("treecol");
+    cols.forEach(c => {
+      c.removeAttribute("data-isCurrentSortCol");
+      c.removeAttribute("sortDirection");
+    });
+    column.setAttribute("data-isCurrentSortCol", "true");
+    column.setAttribute("sortDirection", sortDirection);
+    column.setAttribute("data-last-sortDirection", sortDirection);
+  },
+};
diff --git a/browser/components/preferences/dialogs/sitePermissions.xhtml b/browser/components/preferences/dialogs/sitePermissions.xhtml
new file mode 100644
index 0000000000..e17d701dc6
--- /dev/null
+++ b/browser/components/preferences/dialogs/sitePermissions.xhtml
@@ -0,0 +1,121 @@
+<?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/. -->
+
+<window
+  id="SitePermissionsDialog"
+  xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"
+  xmlns:html="http://www.w3.org/1999/xhtml"
+  data-l10n-id="permissions-window2"
+  data-l10n-attrs="title, style"
+  onload="gSitePermissionsManager.onLoad();"
+  onunload="gSitePermissionsManager.uninit();"
+  persist="width height"
+>
+  <dialog
+    buttons="accept,cancel"
+    data-l10n-id="permission-dialog"
+    data-l10n-attrs="buttonlabelaccept, buttonaccesskeyaccept"
+  >
+    <linkset>
+      <html:link rel="stylesheet" href="chrome://global/skin/global.css" />
+      <html:link
+        rel="stylesheet"
+        href="chrome://browser/content/preferences/dialogs/sitePermissions.css"
+      />
+      <html:link
+        rel="stylesheet"
+        href="chrome://browser/skin/preferences/preferences.css"
+      />
+
+      <html:link
+        rel="localization"
+        href="browser/preferences/preferences.ftl"
+      />
+      <html:link
+        rel="localization"
+        href="browser/preferences/permissions.ftl"
+      />
+    </linkset>
+
+    <script src="chrome://browser/content/preferences/dialogs/sitePermissions.js" />
+    <script src="chrome://browser/content/preferences/extensionControlled.js" />
+
+    <keyset>
+      <key
+        data-l10n-id="permissions-close-key"
+        modifiers="accel"
+        oncommand="window.close();"
+      />
+    </keyset>
+
+    <vbox class="contentPane">
+      <hbox align="center" id="setAutoplayPref" hidden="true">
+        <label data-l10n-id="permissions-autoplay-menu" />
+      </hbox>
+      <description id="permissionsText" control="url" />
+      <separator class="thin" />
+      <hbox align="start">
+        <search-textbox
+          id="searchBox"
+          flex="1"
+          data-l10n-id="permissions-searchbox"
+          data-l10n-attrs="placeholder"
+          oncommand="gSitePermissionsManager.buildPermissionsList();"
+        />
+      </hbox>
+      <separator class="thin" />
+      <listheader>
+        <treecol
+          id="siteCol"
+          data-l10n-id="permissions-site-name"
+          onclick="gSitePermissionsManager.buildPermissionsList(event.target)"
+        />
+        <treecol
+          id="statusCol"
+          data-l10n-id="permissions-status"
+          data-isCurrentSortCol="true"
+          onclick="gSitePermissionsManager.buildPermissionsList(event.target);"
+        />
+      </listheader>
+      <richlistbox
+        id="permissionsBox"
+        selected="false"
+        onkeypress="gSitePermissionsManager.onPermissionKeyPress(event);"
+        onselect="gSitePermissionsManager.onPermissionSelect();"
+      />
+    </vbox>
+
+    <hbox class="actionButtons">
+      <button
+        id="removePermission"
+        disabled="true"
+        data-l10n-id="permissions-remove"
+        oncommand="gSitePermissionsManager.onPermissionDelete();"
+      />
+      <button
+        id="removeAllPermissions"
+        data-l10n-id="permissions-remove-all"
+        oncommand="gSitePermissionsManager.onAllPermissionsDelete();"
+      />
+    </hbox>
+
+    <checkbox id="permissionsDisableCheckbox" />
+    <description id="permissionsDisableDescription" />
+    <hbox
+      id="browserNotificationsPermissionExtensionContent"
+      class="extension-controlled"
+      align="center"
+      hidden="true"
+    >
+      <description control="disableNotificationsPermissionExtension" flex="1" />
+      <button
+        id="disableNotificationsPermissionExtension"
+        class="extension-controlled-button accessory-button"
+        data-l10n-id="disable-extension"
+      />
+    </hbox>
+  </dialog>
+</window>
diff --git a/browser/components/preferences/dialogs/syncChooseWhatToSync.js b/browser/components/preferences/dialogs/syncChooseWhatToSync.js
new file mode 100644
index 0000000000..2cc965b4e1
--- /dev/null
+++ b/browser/components/preferences/dialogs/syncChooseWhatToSync.js
@@ -0,0 +1,60 @@
+/* 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-globals-from /toolkit/content/preferencesBindings.js */
+
+Preferences.addAll([
+  { id: "services.sync.engine.addons", type: "bool" },
+  { id: "services.sync.engine.bookmarks", type: "bool" },
+  { id: "services.sync.engine.history", type: "bool" },
+  { id: "services.sync.engine.tabs", type: "bool" },
+  { id: "services.sync.engine.prefs", type: "bool" },
+  { id: "services.sync.engine.passwords", type: "bool" },
+  { id: "services.sync.engine.addresses", type: "bool" },
+  { id: "services.sync.engine.creditcards", type: "bool" },
+]);
+
+let gSyncChooseWhatToSync = {
+  init() {
+    this._adjustForPrefs();
+    let options = window.arguments[0];
+    if (options.disconnectFun) {
+      // We offer 'disconnect'
+      document.addEventListener("dialogextra2", function () {
+        options.disconnectFun().then(disconnected => {
+          if (disconnected) {
+            window.close();
+          }
+        });
+      });
+    } else {
+      // no "disconnect" - hide the button.
+      document
+        .getElementById("syncChooseOptions")
+        .getButton("extra2").hidden = true;
+    }
+  },
+
+  // make whatever tweaks we need based on preferences.
+  _adjustForPrefs() {
+    // These 2 engines are unique in that there are prefs that make the
+    // entire engine unavailable (which is distinct from "disabled").
+    let enginePrefs = [
+      ["services.sync.engine.addresses", ".sync-engine-addresses"],
+      ["services.sync.engine.creditcards", ".sync-engine-creditcards"],
+    ];
+    for (let [enabledPref, className] of enginePrefs) {
+      let availablePref = enabledPref + ".available";
+      // If the engine is enabled we force it to be available, otherwise we see
+      // spooky things happen (like it magically re-appear later)
+      if (Services.prefs.getBoolPref(enabledPref, false)) {
+        Services.prefs.setBoolPref(availablePref, true);
+      }
+      if (!Services.prefs.getBoolPref(availablePref)) {
+        let elt = document.querySelector(className);
+        elt.hidden = true;
+      }
+    }
+  },
+};
diff --git a/browser/components/preferences/dialogs/syncChooseWhatToSync.xhtml b/browser/components/preferences/dialogs/syncChooseWhatToSync.xhtml
new file mode 100644
index 0000000000..2b041c4802
--- /dev/null
+++ b/browser/components/preferences/dialogs/syncChooseWhatToSync.xhtml
@@ -0,0 +1,88 @@
+<?xml version="1.0"?>
+
+<!-- -*- 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/. -->
+
+<window
+  type="child"
+  xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"
+  xmlns:html="http://www.w3.org/1999/xhtml"
+  onload="gSyncChooseWhatToSync.init();"
+  data-l10n-id="sync-choose-what-to-sync-dialog3"
+  data-l10n-attrs="title, style"
+>
+  <dialog
+    id="syncChooseOptions"
+    buttons="accept,cancel,extra2"
+    data-l10n-id="sync-choose-what-to-sync-dialog3"
+    data-l10n-attrs="buttonlabelaccept, buttonlabelextra2"
+  >
+    <linkset>
+      <html:link rel="stylesheet" href="chrome://global/skin/global.css" />
+
+      <html:link
+        rel="localization"
+        href="browser/preferences/preferences.ftl"
+      />
+      <html:link rel="localization" href="toolkit/branding/accounts.ftl" />
+    </linkset>
+    <script src="chrome://global/content/preferencesBindings.js" />
+    <script src="chrome://browser/content/preferences/dialogs/syncChooseWhatToSync.js" />
+    <description
+      class="sync-choose-dialog-description"
+      data-l10n-id="sync-choose-dialog-subtitle"
+    />
+    <html:div class="sync-engines-list">
+      <html:div class="sync-engine-bookmarks">
+        <checkbox
+          data-l10n-id="sync-engine-bookmarks"
+          preference="services.sync.engine.bookmarks"
+        />
+      </html:div>
+      <html:div class="sync-engine-history">
+        <checkbox
+          data-l10n-id="sync-engine-history"
+          preference="services.sync.engine.history"
+        />
+      </html:div>
+      <html:div class="sync-engine-tabs">
+        <checkbox
+          data-l10n-id="sync-engine-tabs"
+          preference="services.sync.engine.tabs"
+        />
+      </html:div>
+      <html:div class="sync-engine-passwords">
+        <checkbox
+          data-l10n-id="sync-engine-passwords"
+          preference="services.sync.engine.passwords"
+        />
+      </html:div>
+      <html:div class="sync-engine-addresses">
+        <checkbox
+          data-l10n-id="sync-engine-addresses"
+          preference="services.sync.engine.addresses"
+        />
+      </html:div>
+      <html:div class="sync-engine-creditcards">
+        <checkbox
+          data-l10n-id="sync-engine-payment-methods2"
+          preference="services.sync.engine.creditcards"
+        />
+      </html:div>
+      <html:div class="sync-engine-addons">
+        <checkbox
+          data-l10n-id="sync-engine-addons"
+          preference="services.sync.engine.addons"
+        />
+      </html:div>
+      <html:div class="sync-engine-prefs">
+        <checkbox
+          data-l10n-id="sync-engine-settings"
+          preference="services.sync.engine.prefs"
+        />
+      </html:div>
+    </html:div>
+  </dialog>
+</window>
diff --git a/browser/components/preferences/dialogs/translationExceptions.js b/browser/components/preferences/dialogs/translationExceptions.js
new file mode 100644
index 0000000000..27579594c9
--- /dev/null
+++ b/browser/components/preferences/dialogs/translationExceptions.js
@@ -0,0 +1,256 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 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/. */
+
+// TODO (Bug 1817084) Remove this file when we disable the extension
+
+"use strict";
+
+const kPermissionType = "translate";
+const kLanguagesPref = "browser.translation.neverForLanguages";
+
+function Tree(aId, aData) {
+  this._data = aData;
+  this._tree = document.getElementById(aId);
+  this._tree.view = this;
+}
+
+Tree.prototype = {
+  get tree() {
+    return this._tree;
+  },
+  get isEmpty() {
+    return !this._data.length;
+  },
+  get hasSelection() {
+    return this.selection.count > 0;
+  },
+  getSelectedItems() {
+    let result = [];
+
+    let rc = this.selection.getRangeCount();
+    for (let i = 0; i < rc; ++i) {
+      let min = {},
+        max = {};
+      this.selection.getRangeAt(i, min, max);
+      for (let j = min.value; j <= max.value; ++j) {
+        result.push(this._data[j]);
+      }
+    }
+
+    return result;
+  },
+
+  // nsITreeView implementation
+  get rowCount() {
+    return this._data.length;
+  },
+  getCellText(aRow, aColumn) {
+    return this._data[aRow];
+  },
+  isSeparator(aIndex) {
+    return false;
+  },
+  isSorted() {
+    return false;
+  },
+  isContainer(aIndex) {
+    return false;
+  },
+  setTree(aTree) {},
+  getImageSrc(aRow, aColumn) {},
+  getCellValue(aRow, aColumn) {},
+  cycleHeader(column) {},
+  getRowProperties(row) {
+    return "";
+  },
+  getColumnProperties(column) {
+    return "";
+  },
+  getCellProperties(row, column) {
+    return "";
+  },
+  QueryInterface: ChromeUtils.generateQI(["nsITreeView"]),
+};
+
+function Lang(aCode, label) {
+  this.langCode = aCode;
+  this._label = label;
+}
+
+Lang.prototype = {
+  toString() {
+    return this._label;
+  },
+};
+
+var gTranslationExceptions = {
+  onLoad() {
+    if (this._siteTree) {
+      // Re-using an open dialog, clear the old observers.
+      this.uninit();
+    }
+
+    // Load site permissions into an array.
+    this._sites = [];
+    for (let perm of Services.perms.all) {
+      if (
+        perm.type == kPermissionType &&
+        perm.capability == Services.perms.DENY_ACTION
+      ) {
+        this._sites.push(perm.principal.origin);
+      }
+    }
+    Services.obs.addObserver(this, "perm-changed");
+    this._sites.sort();
+
+    this._siteTree = new Tree("sitesTree", this._sites);
+    this.onSiteSelected();
+
+    this._langs = this.getLanguageExceptions();
+    Services.prefs.addObserver(kLanguagesPref, this);
+    this._langTree = new Tree("languagesTree", this._langs);
+    this.onLanguageSelected();
+  },
+
+  // Get the list of languages we don't translate as an array.
+  getLanguageExceptions() {
+    let langs = Services.prefs.getCharPref(kLanguagesPref);
+    if (!langs) {
+      return [];
+    }
+
+    let langArr = langs.split(",");
+    let displayNames = Services.intl.getLanguageDisplayNames(
+      undefined,
+      langArr
+    );
+    let result = langArr.map((lang, i) => new Lang(lang, displayNames[i]));
+    result.sort();
+
+    return result;
+  },
+
+  observe(aSubject, aTopic, aData) {
+    if (aTopic == "perm-changed") {
+      if (aData == "cleared") {
+        if (!this._sites.length) {
+          return;
+        }
+        let removed = this._sites.splice(0, this._sites.length);
+        this._siteTree.tree.rowCountChanged(0, -removed.length);
+      } else {
+        let perm = aSubject.QueryInterface(Ci.nsIPermission);
+        if (perm.type != kPermissionType) {
+          return;
+        }
+
+        if (aData == "added") {
+          if (perm.capability != Services.perms.DENY_ACTION) {
+            return;
+          }
+          this._sites.push(perm.principal.origin);
+          this._sites.sort();
+          let tree = this._siteTree.tree;
+          tree.rowCountChanged(0, 1);
+          tree.invalidate();
+        } else if (aData == "deleted") {
+          let index = this._sites.indexOf(perm.principal.origin);
+          if (index == -1) {
+            return;
+          }
+          this._sites.splice(index, 1);
+          this._siteTree.tree.rowCountChanged(index, -1);
+          this.onSiteSelected();
+          return;
+        }
+      }
+      this.onSiteSelected();
+    } else if (aTopic == "nsPref:changed") {
+      this._langs = this.getLanguageExceptions();
+      let change = this._langs.length - this._langTree.rowCount;
+      this._langTree._data = this._langs;
+      let tree = this._langTree.tree;
+      if (change) {
+        tree.rowCountChanged(0, change);
+      }
+      tree.invalidate();
+      this.onLanguageSelected();
+    }
+  },
+
+  _handleButtonDisabling(aTree, aIdPart) {
+    let empty = aTree.isEmpty;
+    document.getElementById("removeAll" + aIdPart + "s").disabled = empty;
+    document.getElementById("remove" + aIdPart).disabled =
+      empty || !aTree.hasSelection;
+  },
+
+  onLanguageSelected() {
+    this._handleButtonDisabling(this._langTree, "Language");
+  },
+
+  onSiteSelected() {
+    this._handleButtonDisabling(this._siteTree, "Site");
+  },
+
+  onLanguageDeleted() {
+    let langs = Services.prefs.getCharPref(kLanguagesPref);
+    if (!langs) {
+      return;
+    }
+
+    let removed = this._langTree.getSelectedItems().map(l => l.langCode);
+
+    langs = langs.split(",").filter(l => !removed.includes(l));
+    Services.prefs.setCharPref(kLanguagesPref, langs.join(","));
+  },
+
+  onAllLanguagesDeleted() {
+    Services.prefs.setCharPref(kLanguagesPref, "");
+  },
+
+  onSiteDeleted() {
+    let removedSites = this._siteTree.getSelectedItems();
+    for (let origin of removedSites) {
+      let principal =
+        Services.scriptSecurityManager.createContentPrincipalFromOrigin(origin);
+      Services.perms.removeFromPrincipal(principal, kPermissionType);
+    }
+  },
+
+  onAllSitesDeleted() {
+    if (this._siteTree.isEmpty) {
+      return;
+    }
+
+    let removedSites = this._sites.splice(0, this._sites.length);
+    this._siteTree.tree.rowCountChanged(0, -removedSites.length);
+
+    for (let origin of removedSites) {
+      let principal =
+        Services.scriptSecurityManager.createContentPrincipalFromOrigin(origin);
+      Services.perms.removeFromPrincipal(principal, kPermissionType);
+    }
+
+    this.onSiteSelected();
+  },
+
+  onSiteKeyPress(aEvent) {
+    if (aEvent.keyCode == KeyEvent.DOM_VK_DELETE) {
+      this.onSiteDeleted();
+    }
+  },
+
+  onLanguageKeyPress(aEvent) {
+    if (aEvent.keyCode == KeyEvent.DOM_VK_DELETE) {
+      this.onLanguageDeleted();
+    }
+  },
+
+  uninit() {
+    Services.obs.removeObserver(this, "perm-changed");
+    Services.prefs.removeObserver(kLanguagesPref, this);
+  },
+};
diff --git a/browser/components/preferences/dialogs/translationExceptions.xhtml b/browser/components/preferences/dialogs/translationExceptions.xhtml
new file mode 100644
index 0000000000..1417595676
--- /dev/null
+++ b/browser/components/preferences/dialogs/translationExceptions.xhtml
@@ -0,0 +1,130 @@
+<?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/. -->
+
+<!-- TODO (Bug 1817084) Remove this file when we disable the extension -->
+
+<window
+  id="TranslationDialog"
+  data-l10n-id="translation-window2"
+  data-l10n-attrs="title, style"
+  xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"
+  xmlns:html="http://www.w3.org/1999/xhtml"
+  onload="gTranslationExceptions.onLoad();"
+  onunload="gTranslationExceptions.uninit();"
+  persist="width height"
+>
+  <dialog
+    buttons="accept"
+    data-l10n-id="translation-dialog"
+    data-l10n-attrs="buttonlabelaccept, buttonaccesskeyaccept"
+  >
+    <linkset>
+      <html:link rel="stylesheet" href="chrome://global/skin/global.css" />
+      <html:link
+        rel="stylesheet"
+        href="chrome://browser/skin/preferences/preferences.css"
+      />
+
+      <html:link
+        rel="localization"
+        href="browser/preferences/translation.ftl"
+      />
+    </linkset>
+
+    <script src="chrome://browser/content/preferences/dialogs/translationExceptions.js" />
+
+    <keyset>
+      <key
+        data-l10n-id="translation-close-key"
+        modifiers="accel"
+        oncommand="window.close();"
+      />
+    </keyset>
+
+    <vbox class="contentPane">
+      <vbox flex="1">
+        <label
+          id="languagesLabel"
+          data-l10n-id="translation-languages-disabled-desc"
+          control="permissionsTree"
+        />
+        <separator class="thin" />
+        <tree
+          id="languagesTree"
+          flex="1"
+          style="height: 12em"
+          hidecolumnpicker="true"
+          onkeypress="gTranslationExceptions.onLanguageKeyPress(event)"
+          onselect="gTranslationExceptions.onLanguageSelected();"
+        >
+          <treecols>
+            <treecol
+              id="languageCol"
+              data-l10n-id="translation-languages-column"
+              flex="1"
+            />
+          </treecols>
+          <treechildren />
+        </tree>
+      </vbox>
+      <hbox class="actionButtons" pack="end">
+        <button
+          id="removeLanguage"
+          disabled="true"
+          data-l10n-id="translation-languages-button-remove"
+          oncommand="gTranslationExceptions.onLanguageDeleted();"
+        />
+        <button
+          id="removeAllLanguages"
+          data-l10n-id="translation-languages-button-remove-all"
+          oncommand="gTranslationExceptions.onAllLanguagesDeleted();"
+        />
+        <spacer flex="1" />
+      </hbox>
+      <separator />
+      <vbox flex="1">
+        <label
+          id="languagesLabel"
+          data-l10n-id="translation-sites-disabled-desc"
+          control="permissionsTree"
+        />
+        <separator class="thin" />
+        <tree
+          id="sitesTree"
+          flex="1"
+          style="height: 12em"
+          hidecolumnpicker="true"
+          onkeypress="gTranslationExceptions.onSiteKeyPress(event)"
+          onselect="gTranslationExceptions.onSiteSelected();"
+        >
+          <treecols>
+            <treecol
+              id="siteCol"
+              data-l10n-id="translation-sites-column"
+              flex="1"
+            />
+          </treecols>
+          <treechildren />
+        </tree>
+      </vbox>
+    </vbox>
+
+    <hbox class="actionButtons" pack="end">
+      <button
+        id="removeSite"
+        disabled="true"
+        data-l10n-id="translation-sites-button-remove"
+        oncommand="gTranslationExceptions.onSiteDeleted();"
+      />
+      <button
+        id="removeAllSites"
+        data-l10n-id="translation-sites-button-remove-all"
+        oncommand="gTranslationExceptions.onAllSitesDeleted();"
+      />
+      <spacer flex="1" />
+    </hbox>
+  </dialog>
+</window>
diff --git a/browser/components/preferences/dialogs/translations.js b/browser/components/preferences/dialogs/translations.js
new file mode 100644
index 0000000000..826e6efb4b
--- /dev/null
+++ b/browser/components/preferences/dialogs/translations.js
@@ -0,0 +1,454 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 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/. */
+
+"use strict";
+
+/**
+ * The permission type to give to Services.perms for Translations.
+ */
+const TRANSLATIONS_PERMISSION = "translations";
+/**
+ * The list of BCP-47 language tags that will trigger auto-translate.
+ */
+const ALWAYS_TRANSLATE_LANGS_PREF =
+  "browser.translations.alwaysTranslateLanguages";
+/**
+ * The list of BCP-47 language tags that will prevent showing Translations UI.
+ */
+const NEVER_TRANSLATE_LANGS_PREF =
+  "browser.translations.neverTranslateLanguages";
+
+ChromeUtils.defineESModuleGetters(this, {
+  TranslationsParent: "resource://gre/actors/TranslationsParent.sys.mjs",
+});
+
+function Tree(aId, aData) {
+  this._data = aData;
+  this._tree = document.getElementById(aId);
+  this._tree.view = this;
+}
+
+Tree.prototype = {
+  get tree() {
+    return this._tree;
+  },
+  get isEmpty() {
+    return !this._data.length;
+  },
+  get hasSelection() {
+    return this.selection.count > 0;
+  },
+  getSelectedItems() {
+    let result = [];
+
+    let rc = this.selection.getRangeCount();
+    for (let i = 0; i < rc; ++i) {
+      let min = {},
+        max = {};
+      this.selection.getRangeAt(i, min, max);
+      for (let j = min.value; j <= max.value; ++j) {
+        result.push(this._data[j]);
+      }
+    }
+
+    return result;
+  },
+
+  // nsITreeView implementation
+  get rowCount() {
+    return this._data.length;
+  },
+  getCellText(aRow, aColumn) {
+    return this._data[aRow];
+  },
+  isSeparator(aIndex) {
+    return false;
+  },
+  isSorted() {
+    return false;
+  },
+  isContainer(aIndex) {
+    return false;
+  },
+  setTree(aTree) {},
+  getImageSrc(aRow, aColumn) {},
+  getCellValue(aRow, aColumn) {},
+  cycleHeader(column) {},
+  getRowProperties(row) {
+    return "";
+  },
+  getColumnProperties(column) {
+    return "";
+  },
+  getCellProperties(row, column) {
+    return "";
+  },
+  QueryInterface: ChromeUtils.generateQI(["nsITreeView"]),
+};
+
+function Lang(aCode, label) {
+  this.langCode = aCode;
+  this._label = label;
+}
+
+Lang.prototype = {
+  toString() {
+    return this._label;
+  },
+};
+
+var gTranslationsSettings = {
+  onLoad() {
+    if (this._neverTranslateSiteTree) {
+      // Re-using an open dialog, clear the old observers.
+      this.removeObservers();
+    }
+
+    // Load site permissions into an array.
+    this._neverTranslateSites = TranslationsParent.listNeverTranslateSites();
+
+    // Load language tags into arrays.
+    this._alwaysTranslateLangs = this.getAlwaysTranslateLanguages();
+    this._neverTranslateLangs = this.getNeverTranslateLanguages();
+
+    // Add observers for relevant prefs and permissions.
+    Services.obs.addObserver(this, "perm-changed");
+    Services.prefs.addObserver(ALWAYS_TRANSLATE_LANGS_PREF, this);
+    Services.prefs.addObserver(NEVER_TRANSLATE_LANGS_PREF, this);
+
+    // Build trees from the arrays.
+    this._alwaysTranslateLangsTree = new Tree(
+      "alwaysTranslateLanguagesTree",
+      this._alwaysTranslateLangs
+    );
+    this._neverTranslateLangsTree = new Tree(
+      "neverTranslateLanguagesTree",
+      this._neverTranslateLangs
+    );
+    this._neverTranslateSiteTree = new Tree(
+      "neverTranslateSitesTree",
+      this._neverTranslateSites
+    );
+
+    // Ensure the UI for each group is in the correct state.
+    this.onSelectAlwaysTranslateLanguage();
+    this.onSelectNeverTranslateLanguage();
+    this.onSelectNeverTranslateSite();
+  },
+
+  /**
+   * Retrieves the value of a char-pref splits its value into an
+   * array delimited by commas.
+   *
+   * This is used for the translations preferences which are comma-
+   * separated lists of BCP-47 language tags.
+   *
+   * @param {string} pref
+   * @returns {Array<string>}
+   */
+  getLangsFromPref(pref) {
+    let rawLangs = Services.prefs.getCharPref(pref);
+    if (!rawLangs) {
+      return [];
+    }
+
+    let langArr = rawLangs.split(",");
+    let displayNames = Services.intl.getLanguageDisplayNames(
+      undefined,
+      langArr
+    );
+    let langs = langArr.map((lang, i) => new Lang(lang, displayNames[i]));
+    langs.sort();
+
+    return langs;
+  },
+
+  /**
+   * Retrieves the always-translate language tags as an array.
+   * @returns {Array<string>}
+   */
+  getAlwaysTranslateLanguages() {
+    return this.getLangsFromPref(ALWAYS_TRANSLATE_LANGS_PREF);
+  },
+
+  /**
+   * Retrieves the never-translate language tags as an array.
+   * @returns {Array<string>}
+   */
+  getNeverTranslateLanguages() {
+    return this.getLangsFromPref(NEVER_TRANSLATE_LANGS_PREF);
+  },
+
+  /**
+   * Handles updating the UI components on pref or permission changes.
+   */
+  observe(aSubject, aTopic, aData) {
+    if (aTopic === "perm-changed") {
+      if (aData === "cleared") {
+        // Permissions have been cleared
+        if (!this._neverTranslateSites.length) {
+          // There were no sites with permissions set, nothing to do.
+          return;
+        }
+        // Update the tree based on the amount of permissions removed.
+        let removed = this._neverTranslateSites.splice(
+          0,
+          this._neverTranslateSites.length
+        );
+        this._neverTranslateSiteTree.tree.rowCountChanged(0, -removed.length);
+      } else {
+        let perm = aSubject.QueryInterface(Ci.nsIPermission);
+        if (perm.type != TRANSLATIONS_PERMISSION) {
+          // The updated permission was not for Translations, nothing to do.
+          return;
+        }
+        if (aData === "added") {
+          if (perm.capability != Services.perms.DENY_ACTION) {
+            // We are only showing data for sites we should never translate.
+            // If the permission is not DENY_ACTION, we don't care about it here.
+            return;
+          }
+          this._neverTranslateSites.push(perm.principal.origin);
+          this._neverTranslateSites.sort();
+          let tree = this._neverTranslateSiteTree.tree;
+          tree.rowCountChanged(0, 1);
+          tree.invalidate();
+        } else if (aData == "deleted") {
+          let index = this._neverTranslateSites.indexOf(perm.principal.origin);
+          if (index == -1) {
+            // The deleted permission was not in the tree, nothing to do.
+            return;
+          }
+          this._neverTranslateSites.splice(index, 1);
+          this._neverTranslateSiteTree.tree.rowCountChanged(index, -1);
+        }
+      }
+      // Ensure the UI updates to the changes.
+      this.onSelectNeverTranslateSite();
+    } else if (aTopic === "nsPref:changed") {
+      switch (aData) {
+        case ALWAYS_TRANSLATE_LANGS_PREF: {
+          this._alwaysTranslateLangs = this.getAlwaysTranslateLanguages();
+
+          let alwaysTranslateLangsChange =
+            this._alwaysTranslateLangs.length -
+            this._alwaysTranslateLangsTree.rowCount;
+
+          this._alwaysTranslateLangsTree._data = this._alwaysTranslateLangs;
+          let alwaysTranslateLangsTree = this._alwaysTranslateLangsTree.tree;
+
+          if (alwaysTranslateLangsChange) {
+            alwaysTranslateLangsTree.rowCountChanged(
+              0,
+              alwaysTranslateLangsChange
+            );
+          }
+
+          alwaysTranslateLangsTree.invalidate();
+
+          // Ensure the UI updates to the changes.
+          this.onSelectAlwaysTranslateLanguage();
+          break;
+        }
+        case NEVER_TRANSLATE_LANGS_PREF: {
+          this._neverTranslateLangs = this.getNeverTranslateLanguages();
+
+          let neverTranslateLangsChange =
+            this._neverTranslateLangs.length -
+            this._neverTranslateLangsTree.rowCount;
+
+          this._neverTranslateLangsTree._data = this._neverTranslateLangs;
+          let neverTranslateLangsTree = this._neverTranslateLangsTree.tree;
+
+          if (neverTranslateLangsChange) {
+            neverTranslateLangsTree.rowCountChanged(
+              0,
+              neverTranslateLangsChange
+            );
+          }
+
+          neverTranslateLangsTree.invalidate();
+
+          // Ensure the UI updates to the changes.
+          this.onSelectNeverTranslateLanguage();
+          break;
+        }
+      }
+    }
+  },
+
+  /**
+   * Ensures that buttons states are enabled/disabled accordingly based on the
+   * content of the trees.
+   *
+   * The remove button should be enabled only if an item is selected.
+   * The removeAll button should be enabled any time the tree has content.
+   *
+   * @param {Tree} aTree
+   * @param {string} aIdPart
+   */
+  _handleButtonDisabling(aTree, aIdPart) {
+    let empty = aTree.isEmpty;
+    document.getElementById("removeAll" + aIdPart + "s").disabled = empty;
+    document.getElementById("remove" + aIdPart).disabled =
+      empty || !aTree.hasSelection;
+  },
+
+  /**
+   * Updates the UI state for the always-translate languages section.
+   */
+  onSelectAlwaysTranslateLanguage() {
+    this._handleButtonDisabling(
+      this._alwaysTranslateLangsTree,
+      "AlwaysTranslateLanguage"
+    );
+  },
+
+  /**
+   * Updates the UI state for the never-translate languages section.
+   */
+  onSelectNeverTranslateLanguage() {
+    this._handleButtonDisabling(
+      this._neverTranslateLangsTree,
+      "NeverTranslateLanguage"
+    );
+  },
+
+  /**
+   * Updates the UI state for the never-translate sites section.
+   */
+  onSelectNeverTranslateSite() {
+    this._handleButtonDisabling(
+      this._neverTranslateSiteTree,
+      "NeverTranslateSite"
+    );
+  },
+
+  /**
+   * Updates the value of a language pref to match when a language is removed
+   * through the UI.
+   *
+   * @param {string} pref
+   * @param {Tree} tree
+   */
+  _onRemoveLanguage(pref, tree) {
+    let langs = Services.prefs.getCharPref(pref);
+    if (!langs) {
+      return;
+    }
+
+    let removed = tree.getSelectedItems().map(l => l.langCode);
+
+    langs = langs.split(",").filter(l => !removed.includes(l));
+    Services.prefs.setCharPref(pref, langs.join(","));
+  },
+
+  /**
+   * Updates the never-translate language pref when a never-translate language
+   * is removed via the UI.
+   */
+  onRemoveAlwaysTranslateLanguage() {
+    this._onRemoveLanguage(
+      ALWAYS_TRANSLATE_LANGS_PREF,
+      this._alwaysTranslateLangsTree
+    );
+  },
+
+  /**
+   * Updates the always-translate language pref when a always-translate language
+   * is removed via the UI.
+   */
+  onRemoveNeverTranslateLanguage() {
+    this._onRemoveLanguage(
+      NEVER_TRANSLATE_LANGS_PREF,
+      this._neverTranslateLangsTree
+    );
+  },
+
+  /**
+   * Updates the permissions for a never-translate site when it is removed via the UI.
+   */
+  onRemoveNeverTranslateSite() {
+    let removedNeverTranslateSites =
+      this._neverTranslateSiteTree.getSelectedItems();
+    for (let origin of removedNeverTranslateSites) {
+      TranslationsParent.setNeverTranslateSiteByOrigin(false, origin);
+    }
+  },
+
+  /**
+   * Clears the always-translate languages pref when the list is cleared in the UI.
+   */
+  onRemoveAllAlwaysTranslateLanguages() {
+    Services.prefs.setCharPref(ALWAYS_TRANSLATE_LANGS_PREF, "");
+  },
+
+  /**
+   * Clears the never-translate languages pref when the list is cleared in the UI.
+   */
+  onRemoveAllNeverTranslateLanguages() {
+    Services.prefs.setCharPref(NEVER_TRANSLATE_LANGS_PREF, "");
+  },
+
+  /**
+   * Clears the never-translate sites pref when the list is cleared in the UI.
+   */
+  onRemoveAllNeverTranslateSites() {
+    if (this._neverTranslateSiteTree.isEmpty) {
+      return;
+    }
+
+    let removedNeverTranslateSites = this._neverTranslateSites.splice(
+      0,
+      this._neverTranslateSites.length
+    );
+    this._neverTranslateSiteTree.tree.rowCountChanged(
+      0,
+      -removedNeverTranslateSites.length
+    );
+
+    for (let origin of removedNeverTranslateSites) {
+      TranslationsParent.setNeverTranslateSiteByOrigin(false, origin);
+    }
+
+    this.onSelectNeverTranslateSite();
+  },
+
+  /**
+   * Handles removing a selected always-translate language via the keyboard.
+   */
+  onAlwaysTranslateLanguageKeyPress(aEvent) {
+    if (aEvent.keyCode == KeyEvent.DOM_VK_DELETE) {
+      this.onRemoveAlwaysTranslateLanguage();
+    }
+  },
+
+  /**
+   * Handles removing a selected never-translate language via the keyboard.
+   */
+  onNeverTranslateLanguageKeyPress(aEvent) {
+    if (aEvent.keyCode == KeyEvent.DOM_VK_DELETE) {
+      this.onRemoveNeverTranslateLanguage();
+    }
+  },
+
+  /**
+   * Handles removing a selected never-translate site via the keyboard.
+   */
+  onNeverTranslateSiteKeyPress(aEvent) {
+    if (aEvent.keyCode == KeyEvent.DOM_VK_DELETE) {
+      this.onRemoveNeverTranslateSite();
+    }
+  },
+
+  /**
+   * Removes any active preference and permissions observers.
+   */
+  removeObservers() {
+    Services.obs.removeObserver(this, "perm-changed");
+    Services.prefs.removeObserver(ALWAYS_TRANSLATE_LANGS_PREF, this);
+    Services.prefs.removeObserver(NEVER_TRANSLATE_LANGS_PREF, this);
+  },
+};
diff --git a/browser/components/preferences/dialogs/translations.xhtml b/browser/components/preferences/dialogs/translations.xhtml
new file mode 100644
index 0000000000..1a55631b0c
--- /dev/null
+++ b/browser/components/preferences/dialogs/translations.xhtml
@@ -0,0 +1,161 @@
+<?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/. -->
+
+<window
+  id="TranslationsDialog"
+  data-l10n-id="translations-settings-title"
+  data-l10n-attrs="title, style"
+  xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"
+  xmlns:html="http://www.w3.org/1999/xhtml"
+  onload="gTranslationsSettings.onLoad();"
+  onunload="gTranslationsSettings.removeObservers();"
+  persist="width height"
+>
+  <dialog
+    buttons="accept"
+    data-l10n-id="translations-settings-close-dialog"
+    data-l10n-attrs="buttonlabelaccept, buttonaccesskeyaccept"
+  >
+    <linkset>
+      <html:link rel="stylesheet" href="chrome://global/skin/global.css" />
+      <html:link
+        rel="stylesheet"
+        href="chrome://browser/skin/preferences/preferences.css"
+      />
+
+      <html:link rel="localization" href="browser/translations.ftl" />
+    </linkset>
+
+    <script src="chrome://browser/content/preferences/dialogs/translations.js" />
+
+    <keyset>
+      <key
+        data-l10n-id="translations-settings-close-key"
+        modifiers="accel"
+        oncommand="window.close();"
+      />
+    </keyset>
+
+    <vbox class="contentPane">
+      <vbox flex="1">
+        <label
+          id="alwaysTranslateLanguagesLabel"
+          data-l10n-id="translations-settings-always-translate-langs-description"
+          control="permissionsTree"
+        />
+        <separator class="thin" />
+        <tree
+          id="alwaysTranslateLanguagesTree"
+          flex="1"
+          style="height: 12em"
+          hidecolumnpicker="true"
+          onkeypress="gTranslationsSettings.onAlwaysTranslateLanguageKeyPress(event)"
+          onselect="gTranslationsSettings.onSelectAlwaysTranslateLanguage();"
+        >
+          <treecols>
+            <treecol
+              id="languageCol"
+              data-l10n-id="translations-settings-languages-column"
+              flex="1"
+            />
+          </treecols>
+          <treechildren />
+        </tree>
+      </vbox>
+      <hbox class="actionButtons" pack="start">
+        <button
+          id="removeAlwaysTranslateLanguage"
+          disabled="true"
+          data-l10n-id="translations-settings-remove-language-button"
+          oncommand="gTranslationsSettings.onRemoveAlwaysTranslateLanguage();"
+        />
+        <button
+          id="removeAllAlwaysTranslateLanguages"
+          data-l10n-id="translations-settings-remove-all-languages-button"
+          oncommand="gTranslationsSettings.onRemoveAllAlwaysTranslateLanguages();"
+        />
+      </hbox>
+      <separator />
+      <vbox flex="1">
+        <label
+          id="neverTranslateLanguagesLabel"
+          data-l10n-id="translations-settings-never-translate-langs-description"
+          control="permissionsTree"
+        />
+        <separator class="thin" />
+        <tree
+          id="neverTranslateLanguagesTree"
+          flex="1"
+          style="height: 12em"
+          hidecolumnpicker="true"
+          onkeypress="gTranslationsSettings.onNeverTranslateLanguageKeyPress(event)"
+          onselect="gTranslationsSettings.onSelectNeverTranslateLanguage();"
+        >
+          <treecols>
+            <treecol
+              id="languageCol"
+              data-l10n-id="translations-settings-languages-column"
+              flex="1"
+            />
+          </treecols>
+          <treechildren />
+        </tree>
+      </vbox>
+      <hbox class="actionButtons" pack="start">
+        <button
+          id="removeNeverTranslateLanguage"
+          disabled="true"
+          data-l10n-id="translations-settings-remove-language-button"
+          oncommand="gTranslationsSettings.onRemoveNeverTranslateLanguage();"
+        />
+        <button
+          id="removeAllNeverTranslateLanguages"
+          data-l10n-id="translations-settings-remove-all-languages-button"
+          oncommand="gTranslationsSettings.onRemoveAllNeverTranslateLanguages();"
+        />
+      </hbox>
+      <separator />
+      <vbox flex="1">
+        <label
+          id="neverTranslateSitesLabel"
+          data-l10n-id="translations-settings-never-translate-sites-description"
+          control="permissionsTree"
+        />
+        <separator class="thin" />
+        <tree
+          id="neverTranslateSitesTree"
+          flex="1"
+          style="height: 12em"
+          hidecolumnpicker="true"
+          onkeypress="gTranslationsSettings.onNeverTranslateSiteKeyPress(event)"
+          onselect="gTranslationsSettings.onSelectNeverTranslateSite();"
+        >
+          <treecols>
+            <treecol
+              id="siteCol"
+              data-l10n-id="translations-settings-sites-column"
+              flex="1"
+            />
+          </treecols>
+          <treechildren />
+        </tree>
+      </vbox>
+      <hbox class="actionButtons" pack="start">
+        <button
+          id="removeNeverTranslateSite"
+          disabled="true"
+          data-l10n-id="translations-settings-remove-site-button"
+          oncommand="gTranslationsSettings.onRemoveNeverTranslateSite();"
+        />
+        <button
+          id="removeAllNeverTranslateSites"
+          data-l10n-id="translations-settings-remove-all-sites-button"
+          oncommand="gTranslationsSettings.onRemoveAllNeverTranslateSites();"
+        />
+      </hbox>
+    </vbox>
+  </dialog>
+</window>