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diff --git a/application/basilisk/components/preferences/in-content/privacy.js b/application/basilisk/components/preferences/in-content/privacy.js
new file mode 100644
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--- /dev/null
+++ b/application/basilisk/components/preferences/in-content/privacy.js
@@ -0,0 +1,712 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+Components.utils.import("resource://gre/modules/AppConstants.jsm");
+Components.utils.import("resource://gre/modules/PluralForm.jsm");
+
+XPCOMUtils.defineLazyModuleGetter(this, "ContextualIdentityService",
+                                  "resource://gre/modules/ContextualIdentityService.jsm");
+XPCOMUtils.defineLazyModuleGetter(this, "PluralForm",
+                                  "resource://gre/modules/PluralForm.jsm");
+
+var gPrivacyPane = {
+
+  /**
+   * Whether the use has selected the auto-start private browsing mode in the UI.
+   */
+  _autoStartPrivateBrowsing: false,
+
+  /**
+   * Whether the prompt to restart Firefox should appear when changing the autostart pref.
+   */
+  _shouldPromptForRestart: true,
+
+  /**
+   * Show the Tracking Protection UI depending on the
+   * privacy.trackingprotection.ui.enabled pref, and linkify its Learn More link
+   */
+  _initTrackingProtection: function () {
+    if (!Services.prefs.getBoolPref("privacy.trackingprotection.ui.enabled")) {
+      return;
+    }
+
+    let link = document.getElementById("trackingProtectionLearnMore");
+    let url = Services.urlFormatter.formatURLPref("app.support.baseURL") + "tracking-protection";
+    link.setAttribute("href", url);
+
+    this.trackingProtectionReadPrefs();
+
+    document.getElementById("trackingprotectionbox").hidden = false;
+    document.getElementById("trackingprotectionpbmbox").hidden = true;
+  },
+
+  /**
+   * Linkify the Learn More link of the Private Browsing Mode Tracking
+   * Protection UI.
+   */
+  _initTrackingProtectionPBM: function () {
+    let link = document.getElementById("trackingProtectionPBMLearnMore");
+    let url = Services.urlFormatter.formatURLPref("app.support.baseURL") + "tracking-protection-pbm";
+    link.setAttribute("href", url);
+  },
+
+  /**
+   * Initialize autocomplete to ensure prefs are in sync.
+   */
+  _initAutocomplete: function () {
+    Components.classes["@mozilla.org/autocomplete/search;1?name=unifiedcomplete"]
+              .getService(Components.interfaces.mozIPlacesAutoComplete);
+  },
+
+  /**
+   * Show the Containers UI depending on the privacy.userContext.ui.enabled pref.
+   */
+  _initBrowserContainers: function () {
+    if (!Services.prefs.getBoolPref("privacy.userContext.ui.enabled")) {
+      return;
+    }
+
+    let link = document.getElementById("browserContainersLearnMore");
+    link.href = Services.urlFormatter.formatURLPref("app.support.baseURL") + "containers";
+
+    document.getElementById("browserContainersbox").hidden = false;
+
+    document.getElementById("browserContainersCheckbox").checked =
+      Services.prefs.getBoolPref("privacy.userContext.enabled");
+  },
+
+  _checkBrowserContainers: function(event) {
+    let checkbox = document.getElementById("browserContainersCheckbox");
+    if (checkbox.checked) {
+      Services.prefs.setBoolPref("privacy.userContext.enabled", true);
+      return;
+    }
+
+    let count = ContextualIdentityService.countContainerTabs();
+    if (count == 0) {
+      Services.prefs.setBoolPref("privacy.userContext.enabled", false);
+      return;
+    }
+
+    let bundlePreferences = document.getElementById("bundlePreferences");
+
+    let title = bundlePreferences.getString("disableContainersAlertTitle");
+    let message = PluralForm.get(count, bundlePreferences.getString("disableContainersMsg"))
+                            .replace("#S", count)
+    let okButton = PluralForm.get(count, bundlePreferences.getString("disableContainersOkButton"))
+                             .replace("#S", count)
+    let cancelButton = bundlePreferences.getString("disableContainersButton2");
+
+    let buttonFlags = (Ci.nsIPrompt.BUTTON_TITLE_IS_STRING * Ci.nsIPrompt.BUTTON_POS_0) +
+                      (Ci.nsIPrompt.BUTTON_TITLE_IS_STRING * Ci.nsIPrompt.BUTTON_POS_1);
+
+    let rv = Services.prompt.confirmEx(window, title, message, buttonFlags,
+                                       okButton, cancelButton, null, null, {});
+    if (rv == 0) {
+      ContextualIdentityService.closeAllContainerTabs();
+      Services.prefs.setBoolPref("privacy.userContext.enabled", false);
+      return;
+    }
+
+    checkbox.checked = true;
+  },
+
+  /**
+   * Sets up the UI for the number of days of history to keep, and updates the
+   * label of the "Clear Now..." button.
+   */
+  init: function ()
+  {
+    function setEventListener(aId, aEventType, aCallback)
+    {
+      document.getElementById(aId)
+              .addEventListener(aEventType, aCallback.bind(gPrivacyPane));
+    }
+
+    this._updateSanitizeSettingsButton();
+    this.initializeHistoryMode();
+    this.updateHistoryModePane();
+    this.updatePrivacyMicroControls();
+    this.initAutoStartPrivateBrowsingReverter();
+    this._initTrackingProtection();
+    this._initTrackingProtectionPBM();
+    this._initAutocomplete();
+    this._initBrowserContainers();
+
+    setEventListener("privacy.sanitize.sanitizeOnShutdown", "change",
+                     gPrivacyPane._updateSanitizeSettingsButton);
+    setEventListener("browser.privatebrowsing.autostart", "change",
+                     gPrivacyPane.updatePrivacyMicroControls);
+    setEventListener("historyMode", "command", function () {
+      gPrivacyPane.updateHistoryModePane();
+      gPrivacyPane.updateHistoryModePrefs();
+      gPrivacyPane.updatePrivacyMicroControls();
+      gPrivacyPane.updateAutostart();
+    });
+    setEventListener("historyRememberClear", "click", function () {
+      gPrivacyPane.clearPrivateDataNow(false);
+      return false;
+    });
+    setEventListener("historyRememberCookies", "click", function () {
+      gPrivacyPane.showCookies();
+      return false;
+    });
+    setEventListener("historyDontRememberClear", "click", function () {
+      gPrivacyPane.clearPrivateDataNow(true);
+      return false;
+    });
+    setEventListener("doNotTrackSettings", "click", function () {
+      gPrivacyPane.showDoNotTrackSettings();
+      return false;
+    });
+    setEventListener("privateBrowsingAutoStart", "command",
+                     gPrivacyPane.updateAutostart);
+    setEventListener("cookieExceptions", "command",
+                     gPrivacyPane.showCookieExceptions);
+    setEventListener("showCookiesButton", "command",
+                     gPrivacyPane.showCookies);
+    setEventListener("clearDataSettings", "command",
+                     gPrivacyPane.showClearPrivateDataSettings);
+    setEventListener("trackingProtectionRadioGroup", "command",
+                     gPrivacyPane.trackingProtectionWritePrefs);
+    setEventListener("trackingProtectionExceptions", "command",
+                     gPrivacyPane.showTrackingProtectionExceptions);
+    setEventListener("changeBlockList", "command",
+                     gPrivacyPane.showBlockLists);
+    setEventListener("changeBlockListPBM", "command",
+                     gPrivacyPane.showBlockLists);
+    setEventListener("browserContainersCheckbox", "command",
+                     gPrivacyPane._checkBrowserContainers);
+    setEventListener("browserContainersSettings", "command",
+                     gPrivacyPane.showContainerSettings);
+  },
+
+  // TRACKING PROTECTION MODE
+
+  /**
+   * Selects the right item of the Tracking Protection radiogroup.
+   */
+  trackingProtectionReadPrefs() {
+    let enabledPref = document.getElementById("privacy.trackingprotection.enabled");
+    let pbmPref = document.getElementById("privacy.trackingprotection.pbmode.enabled");
+    let radiogroup = document.getElementById("trackingProtectionRadioGroup");
+
+    // Global enable takes precedence over enabled in Private Browsing.
+    if (enabledPref.value) {
+      radiogroup.value = "always";
+    } else if (pbmPref.value) {
+      radiogroup.value = "private";
+    } else {
+      radiogroup.value = "never";
+    }
+  },
+
+  /**
+   * Sets the pref values based on the selected item of the radiogroup.
+   */
+  trackingProtectionWritePrefs() {
+    let enabledPref = document.getElementById("privacy.trackingprotection.enabled");
+    let pbmPref = document.getElementById("privacy.trackingprotection.pbmode.enabled");
+    let radiogroup = document.getElementById("trackingProtectionRadioGroup");
+
+    switch (radiogroup.value) {
+      case "always":
+        enabledPref.value = true;
+        pbmPref.value = true;
+        break;
+      case "private":
+        enabledPref.value = false;
+        pbmPref.value = true;
+        break;
+      case "never":
+        enabledPref.value = false;
+        pbmPref.value = false;
+        break;
+    }
+  },
+
+  // HISTORY MODE
+
+  /**
+   * The list of preferences which affect the initial history mode settings.
+   * If the auto start private browsing mode pref is active, the initial
+   * history mode would be set to "Don't remember anything".
+   * If ALL of these preferences are set to the values that correspond
+   * to keeping some part of history, and the auto-start
+   * private browsing mode is not active, the initial history mode would be
+   * set to "Remember everything".
+   * Otherwise, the initial history mode would be set to "Custom".
+   *
+   * Extensions adding their own preferences can set values here if needed.
+   */
+  prefsForKeepingHistory: {
+    "places.history.enabled": true, // History is enabled
+    "browser.formfill.enable": true, // Form information is saved
+    "network.cookie.cookieBehavior": 0, // All cookies are enabled
+    "network.cookie.lifetimePolicy": 0, // Cookies use supplied lifetime
+    "privacy.sanitize.sanitizeOnShutdown": false, // Private date is NOT cleared on shutdown
+  },
+
+  /**
+   * The list of control IDs which are dependent on the auto-start private
+   * browsing setting, such that in "Custom" mode they would be disabled if
+   * the auto-start private browsing checkbox is checked, and enabled otherwise.
+   *
+   * Extensions adding their own controls can append their IDs to this array if needed.
+   */
+  dependentControls: [
+    "rememberHistory",
+    "rememberForms",
+    "keepUntil",
+    "keepCookiesUntil",
+    "alwaysClear",
+    "clearDataSettings"
+  ],
+
+  /**
+   * Check whether preferences values are set to keep history
+   *
+   * @param aPrefs an array of pref names to check for
+   * @returns boolean true if all of the prefs are set to keep history,
+   *                  false otherwise
+   */
+  _checkHistoryValues: function(aPrefs) {
+    for (let pref of Object.keys(aPrefs)) {
+      if (document.getElementById(pref).value != aPrefs[pref])
+        return false;
+    }
+    return true;
+  },
+
+  /**
+   * Initialize the history mode menulist based on the privacy preferences
+   */
+  initializeHistoryMode: function PPP_initializeHistoryMode()
+  {
+    let mode;
+    let getVal = aPref => document.getElementById(aPref).value;
+
+    if (this._checkHistoryValues(this.prefsForKeepingHistory)) {
+      if (getVal("browser.privatebrowsing.autostart"))
+        mode = "dontremember";
+      else
+        mode = "remember";
+    }
+    else
+      mode = "custom";
+
+    document.getElementById("historyMode").value = mode;
+  },
+
+  /**
+   * Update the selected pane based on the history mode menulist
+   */
+  updateHistoryModePane: function PPP_updateHistoryModePane()
+  {
+    let selectedIndex = -1;
+    switch (document.getElementById("historyMode").value) {
+    case "remember":
+      selectedIndex = 0;
+      break;
+    case "dontremember":
+      selectedIndex = 1;
+      break;
+    case "custom":
+      selectedIndex = 2;
+      break;
+    }
+    document.getElementById("historyPane").selectedIndex = selectedIndex;
+  },
+
+  /**
+   * Update the private browsing auto-start pref and the history mode
+   * micro-management prefs based on the history mode menulist
+   */
+  updateHistoryModePrefs: function PPP_updateHistoryModePrefs()
+  {
+    let pref = document.getElementById("browser.privatebrowsing.autostart");
+    switch (document.getElementById("historyMode").value) {
+    case "remember":
+      if (pref.value)
+        pref.value = false;
+
+      // select the remember history option if needed
+      let rememberHistoryCheckbox = document.getElementById("rememberHistory");
+      if (!rememberHistoryCheckbox.checked)
+        rememberHistoryCheckbox.checked = true;
+
+      // select the remember forms history option
+      document.getElementById("browser.formfill.enable").value = true;
+
+      // select the allow cookies option
+      document.getElementById("network.cookie.cookieBehavior").value = 0;
+      // select the cookie lifetime policy option
+      document.getElementById("network.cookie.lifetimePolicy").value = 0;
+
+      // select the clear on close option
+      document.getElementById("privacy.sanitize.sanitizeOnShutdown").value = false;
+      break;
+    case "dontremember":
+      if (!pref.value)
+        pref.value = true;
+      break;
+    }
+  },
+
+  /**
+   * Update the privacy micro-management controls based on the
+   * value of the private browsing auto-start checkbox.
+   */
+  updatePrivacyMicroControls: function PPP_updatePrivacyMicroControls()
+  {
+    if (document.getElementById("historyMode").value == "custom") {
+      let disabled = this._autoStartPrivateBrowsing =
+        document.getElementById("privateBrowsingAutoStart").checked;
+      this.dependentControls.forEach(function (aElement) {
+        let control = document.getElementById(aElement);
+        let preferenceId = control.getAttribute("preference");
+        if (!preferenceId) {
+          let dependentControlId = control.getAttribute("control");
+          if (dependentControlId) {
+            let dependentControl = document.getElementById(dependentControlId);
+            preferenceId = dependentControl.getAttribute("preference");
+          }
+        }
+
+        let preference = preferenceId ? document.getElementById(preferenceId) : {};
+        control.disabled = disabled || preference.locked;
+      });
+
+      // adjust the cookie controls status
+      this.readAcceptCookies();
+      let lifetimePolicy = document.getElementById("network.cookie.lifetimePolicy").value;
+      if (lifetimePolicy != Ci.nsICookieService.ACCEPT_NORMALLY &&
+          lifetimePolicy != Ci.nsICookieService.ACCEPT_SESSION &&
+          lifetimePolicy != Ci.nsICookieService.ACCEPT_FOR_N_DAYS) {
+        lifetimePolicy = Ci.nsICookieService.ACCEPT_NORMALLY;
+      }
+      document.getElementById("keepCookiesUntil").value = disabled ? 2 : lifetimePolicy;
+
+      // adjust the checked state of the sanitizeOnShutdown checkbox
+      document.getElementById("alwaysClear").checked = disabled ? false :
+        document.getElementById("privacy.sanitize.sanitizeOnShutdown").value;
+
+      // adjust the checked state of the remember history checkboxes
+      document.getElementById("rememberHistory").checked = disabled ? false :
+        document.getElementById("places.history.enabled").value;
+      document.getElementById("rememberForms").checked = disabled ? false :
+        document.getElementById("browser.formfill.enable").value;
+
+      if (!disabled) {
+        // adjust the Settings button for sanitizeOnShutdown
+        this._updateSanitizeSettingsButton();
+      }
+    }
+  },
+
+  // PRIVATE BROWSING
+
+  /**
+   * Initialize the starting state for the auto-start private browsing mode pref reverter.
+   */
+  initAutoStartPrivateBrowsingReverter: function PPP_initAutoStartPrivateBrowsingReverter()
+  {
+    let mode = document.getElementById("historyMode");
+    let autoStart = document.getElementById("privateBrowsingAutoStart");
+    this._lastMode = mode.selectedIndex;
+    this._lastCheckState = autoStart.hasAttribute('checked');
+  },
+
+  _lastMode: null,
+  _lastCheckState: null,
+  updateAutostart: function PPP_updateAutostart() {
+      let mode = document.getElementById("historyMode");
+      let autoStart = document.getElementById("privateBrowsingAutoStart");
+      let pref = document.getElementById("browser.privatebrowsing.autostart");
+      if ((mode.value == "custom" && this._lastCheckState == autoStart.checked) ||
+          (mode.value == "remember" && !this._lastCheckState) ||
+          (mode.value == "dontremember" && this._lastCheckState)) {
+          // These are all no-op changes, so we don't need to prompt.
+          this._lastMode = mode.selectedIndex;
+          this._lastCheckState = autoStart.hasAttribute('checked');
+          return;
+      }
+
+      if (!this._shouldPromptForRestart) {
+        // We're performing a revert. Just let it happen.
+        return;
+      }
+
+      let buttonIndex = confirmRestartPrompt(autoStart.checked, 1,
+                                             true, false);
+      if (buttonIndex == CONFIRM_RESTART_PROMPT_RESTART_NOW) {
+        pref.value = autoStart.hasAttribute('checked');
+        let appStartup = Cc["@mozilla.org/toolkit/app-startup;1"]
+                           .getService(Ci.nsIAppStartup);
+        appStartup.quit(Ci.nsIAppStartup.eAttemptQuit |  Ci.nsIAppStartup.eRestart);
+        return;
+      }
+
+      this._shouldPromptForRestart = false;
+
+      if (this._lastCheckState) {
+        autoStart.checked = "checked";
+      } else {
+        autoStart.removeAttribute('checked');
+      }
+      pref.value = autoStart.hasAttribute('checked');
+      mode.selectedIndex = this._lastMode;
+      mode.doCommand();
+
+      this._shouldPromptForRestart = true;
+  },
+
+  /**
+   * Displays fine-grained, per-site preferences for tracking protection.
+   */
+  showTrackingProtectionExceptions() {
+    let bundlePreferences = document.getElementById("bundlePreferences");
+    let params = {
+      permissionType: "trackingprotection",
+      hideStatusColumn: true,
+      windowTitle: bundlePreferences.getString("trackingprotectionpermissionstitle"),
+      introText: bundlePreferences.getString("trackingprotectionpermissionstext"),
+    };
+    gSubDialog.open("chrome://browser/content/preferences/permissions.xul",
+                    null, params);
+  },
+
+  /**
+   * Displays container panel for customising and adding containers.
+   */
+  showContainerSettings() {
+    gotoPref("containers");
+  },
+
+  /**
+   * Displays the available block lists for tracking protection.
+   */
+  showBlockLists: function ()
+  {
+    var bundlePreferences = document.getElementById("bundlePreferences");
+    let brandName = document.getElementById("bundleBrand")
+                            .getString("brandShortName");
+    var params = { brandShortName: brandName,
+                   windowTitle: bundlePreferences.getString("blockliststitle"),
+                   introText: bundlePreferences.getString("blockliststext") };
+    gSubDialog.open("chrome://browser/content/preferences/blocklists.xul",
+                    null, params);
+  },
+
+  /**
+   * Displays the Do Not Track settings dialog.
+   */
+  showDoNotTrackSettings() {
+    gSubDialog.open("chrome://browser/content/preferences/donottrack.xul",
+                    "resizable=no");
+  },
+
+  // HISTORY
+
+  /*
+   * Preferences:
+   *
+   * places.history.enabled
+   * - whether history is enabled or not
+   * browser.formfill.enable
+   * - true if entries in forms and the search bar should be saved, false
+   *   otherwise
+   */
+
+  // COOKIES
+
+  /*
+   * Preferences:
+   *
+   * network.cookie.cookieBehavior
+   * - determines how the browser should handle cookies:
+   *     0   means enable all cookies
+   *     1   means reject all third party cookies
+   *     2   means disable all cookies
+   *     3   means reject third party cookies unless at least one is already set for the eTLD
+   *         see netwerk/cookie/src/nsCookieService.cpp for details
+   * network.cookie.lifetimePolicy
+   * - determines how long cookies are stored:
+   *     0   means keep cookies until they expire
+   *     2   means keep cookies until the browser is closed
+   */
+
+  /**
+   * Reads the network.cookie.cookieBehavior preference value and
+   * enables/disables the rest of the cookie UI accordingly, returning true
+   * if cookies are enabled.
+   */
+  readAcceptCookies: function ()
+  {
+    var pref = document.getElementById("network.cookie.cookieBehavior");
+    var acceptThirdPartyLabel = document.getElementById("acceptThirdPartyLabel");
+    var acceptThirdPartyMenu = document.getElementById("acceptThirdPartyMenu");
+    var keepUntil = document.getElementById("keepUntil");
+    var menu = document.getElementById("keepCookiesUntil");
+
+    // enable the rest of the UI for anything other than "disable all cookies"
+    var acceptCookies = (pref.value != 2);
+
+    acceptThirdPartyLabel.disabled = acceptThirdPartyMenu.disabled = !acceptCookies;
+    keepUntil.disabled = menu.disabled = this._autoStartPrivateBrowsing || !acceptCookies;
+
+    return acceptCookies;
+  },
+
+  /**
+   * Enables/disables the "keep until" label and menulist in response to the
+   * "accept cookies" checkbox being checked or unchecked.
+   */
+  writeAcceptCookies: function ()
+  {
+    var accept = document.getElementById("acceptCookies");
+    var acceptThirdPartyMenu = document.getElementById("acceptThirdPartyMenu");
+
+    // if we're enabling cookies, automatically select 'accept third party always'
+    if (accept.checked)
+      acceptThirdPartyMenu.selectedIndex = 0;
+
+    return accept.checked ? 0 : 2;
+  },
+
+  /**
+   * Converts between network.cookie.cookieBehavior and the third-party cookie UI
+   */
+  readAcceptThirdPartyCookies: function ()
+  {
+    var pref = document.getElementById("network.cookie.cookieBehavior");
+    switch (pref.value)
+    {
+      case 0:
+        return "always";
+      case 1:
+        return "never";
+      case 2:
+        return "never";
+      case 3:
+        return "visited";
+      default:
+        return undefined;
+    }
+  },
+
+  writeAcceptThirdPartyCookies: function ()
+  {
+    var accept = document.getElementById("acceptThirdPartyMenu").selectedItem;
+    switch (accept.value)
+    {
+      case "always":
+        return 0;
+      case "visited":
+        return 3;
+      case "never":
+        return 1;
+      default:
+        return undefined;
+    }
+  },
+
+  /**
+   * Displays fine-grained, per-site preferences for cookies.
+   */
+  showCookieExceptions: function ()
+  {
+    var bundlePreferences = document.getElementById("bundlePreferences");
+    var params = { blockVisible   : true,
+                   sessionVisible : true,
+                   allowVisible   : true,
+                   prefilledHost  : "",
+                   permissionType : "cookie",
+                   windowTitle    : bundlePreferences.getString("cookiepermissionstitle"),
+                   introText      : bundlePreferences.getString("cookiepermissionstext") };
+    gSubDialog.open("chrome://browser/content/preferences/permissions.xul",
+                    null, params);
+  },
+
+  /**
+   * Displays all the user's cookies in a dialog.
+   */
+  showCookies: function (aCategory)
+  {
+    gSubDialog.open("chrome://browser/content/preferences/cookies.xul");
+  },
+
+  // CLEAR PRIVATE DATA
+
+  /*
+   * Preferences:
+   *
+   * privacy.sanitize.sanitizeOnShutdown
+   * - true if the user's private data is cleared on startup according to the
+   *   Clear Private Data settings, false otherwise
+   */
+
+  /**
+   * Displays the Clear Private Data settings dialog.
+   */
+  showClearPrivateDataSettings: function ()
+  {
+    gSubDialog.open("chrome://browser/content/preferences/sanitize.xul", "resizable=no");
+  },
+
+
+  /**
+   * Displays a dialog from which individual parts of private data may be
+   * cleared.
+   */
+  clearPrivateDataNow: function (aClearEverything) {
+    var ts = document.getElementById("privacy.sanitize.timeSpan");
+    var timeSpanOrig = ts.value;
+
+    if (aClearEverything) {
+      ts.value = 0;
+    }
+
+    gSubDialog.open("chrome://browser/content/sanitize.xul", "resizable=no", null, () => {
+      // reset the timeSpan pref
+      if (aClearEverything) {
+        ts.value = timeSpanOrig;
+      }
+
+      Services.obs.notifyObservers(null, "clear-private-data", null);
+    });
+  },
+
+  /**
+   * Enables or disables the "Settings..." button depending
+   * on the privacy.sanitize.sanitizeOnShutdown preference value
+   */
+  _updateSanitizeSettingsButton: function () {
+    var settingsButton = document.getElementById("clearDataSettings");
+    var sanitizeOnShutdownPref = document.getElementById("privacy.sanitize.sanitizeOnShutdown");
+
+    settingsButton.disabled = !sanitizeOnShutdownPref.value;
+   },
+
+  // CONTAINERS
+
+  /*
+   * preferences:
+   *
+   * privacy.userContext.enabled
+   * - true if containers is enabled
+   */
+
+   /**
+    * Enables/disables the Settings button used to configure containers
+    */
+   readBrowserContainersCheckbox: function ()
+   {
+     var pref = document.getElementById("privacy.userContext.enabled");
+     var settings = document.getElementById("browserContainersSettings");
+
+     settings.disabled = !pref.value;
+   }
+
+};