Merge commit '50d3e596bbe89c95615f96eb71f6bc5be737a1db' into Basilisk-releasev2018.07.18

# Conflicts:
#	browser/app/profile/firefox.js
#	browser/components/preferences/jar.mn

1 files changed, 767 insertions, 0 deletions

diff --git a/application/basilisk/components/preferences/in-content/advanced.js b/application/basilisk/components/preferences/in-content/advanced.js
new file mode 100644
index 000000000..5f9458eee
--- /dev/null
+++ b/application/basilisk/components/preferences/in-content/advanced.js
@@ -0,0 +1,767 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+// Load DownloadUtils module for convertByteUnits
+Components.utils.import("resource://gre/modules/DownloadUtils.jsm");
+Components.utils.import("resource://gre/modules/LoadContextInfo.jsm");
+Components.utils.import("resource://gre/modules/XPCOMUtils.jsm");
+
+const PREF_UPLOAD_ENABLED = "datareporting.healthreport.uploadEnabled";
+
+var gAdvancedPane = {
+  _inited: false,
+
+  /**
+   * Brings the appropriate tab to the front and initializes various bits of UI.
+   */
+  init: function ()
+  {
+    function setEventListener(aId, aEventType, aCallback)
+    {
+      document.getElementById(aId)
+              .addEventListener(aEventType, aCallback.bind(gAdvancedPane));
+    }
+
+    this._inited = true;
+    var advancedPrefs = document.getElementById("advancedPrefs");
+
+    var preference = document.getElementById("browser.preferences.advanced.selectedTabIndex");
+    if (preference.value !== null)
+        advancedPrefs.selectedIndex = preference.value;
+
+    if (AppConstants.MOZ_UPDATER) {
+      let onUnload = function () {
+        window.removeEventListener("unload", onUnload, false);
+        Services.prefs.removeObserver("app.update.", this);
+      }.bind(this);
+      window.addEventListener("unload", onUnload, false);
+      Services.prefs.addObserver("app.update.", this, false);
+      this.updateReadPrefs();
+    }
+    this.updateOfflineApps();
+    this.initTelemetry();
+    if (AppConstants.MOZ_TELEMETRY_REPORTING) {
+      this.initSubmitHealthReport();
+    }
+    this.updateOnScreenKeyboardVisibility();
+    this.updateCacheSizeInputField();
+    this.updateActualCacheSize();
+    this.updateActualAppCacheSize();
+
+    setEventListener("layers.acceleration.disabled", "change",
+                     gAdvancedPane.updateHardwareAcceleration);
+    setEventListener("advancedPrefs", "select",
+                     gAdvancedPane.tabSelectionChanged);
+    if (AppConstants.MOZ_TELEMETRY_REPORTING) {
+      setEventListener("submitHealthReportBox", "command",
+                       gAdvancedPane.updateSubmitHealthReport);
+    }
+
+    setEventListener("connectionSettings", "command",
+                     gAdvancedPane.showConnections);
+    setEventListener("clearCacheButton", "command",
+                     gAdvancedPane.clearCache);
+    setEventListener("clearOfflineAppCacheButton", "command",
+                     gAdvancedPane.clearOfflineAppCache);
+    setEventListener("offlineNotifyExceptions", "command",
+                     gAdvancedPane.showOfflineExceptions);
+    setEventListener("offlineAppsList", "select",
+                     gAdvancedPane.offlineAppSelected);
+    let bundlePrefs = document.getElementById("bundlePreferences");
+    document.getElementById("offlineAppsList")
+            .style.height = bundlePrefs.getString("offlineAppsList.height");
+    setEventListener("offlineAppsListRemove", "command",
+                     gAdvancedPane.removeOfflineApp);
+    if (AppConstants.MOZ_UPDATER) {
+      setEventListener("updateRadioGroup", "command",
+                       gAdvancedPane.updateWritePrefs);
+      setEventListener("showUpdateHistory", "command",
+                       gAdvancedPane.showUpdates);
+    }
+    setEventListener("viewCertificatesButton", "command",
+                     gAdvancedPane.showCertificates);
+    setEventListener("viewSecurityDevicesButton", "command",
+                     gAdvancedPane.showSecurityDevices);
+    setEventListener("cacheSize", "change",
+                     gAdvancedPane.updateCacheSizePref);
+
+    if (AppConstants.MOZ_WIDGET_GTK) {
+      // GTK tabbox' allow the scroll wheel to change the selected tab,
+      // but we don't want this behavior for the in-content preferences.
+      let tabsElement = document.getElementById("tabsElement");
+      tabsElement.addEventListener("DOMMouseScroll", event => {
+        event.stopPropagation();
+      }, true);
+    }
+  },
+
+  /**
+   * Stores the identity of the current tab in preferences so that the selected
+   * tab can be persisted between openings of the preferences window.
+   */
+  tabSelectionChanged: function ()
+  {
+    if (!this._inited)
+      return;
+    var advancedPrefs = document.getElementById("advancedPrefs");
+    var preference = document.getElementById("browser.preferences.advanced.selectedTabIndex");
+
+    // tabSelectionChanged gets called twice due to the selectedIndex being set
+    // by both the selectedItem and selectedPanel callstacks. This guard is used
+    // to prevent double-counting in Telemetry.
+    if (preference.valueFromPreferences != advancedPrefs.selectedIndex) {
+      Services.telemetry
+              .getHistogramById("FX_PREFERENCES_CATEGORY_OPENED")
+              .add(telemetryBucketForCategory("advanced"));
+    }
+
+    preference.valueFromPreferences = advancedPrefs.selectedIndex;
+  },
+
+  // GENERAL TAB
+
+  /*
+   * Preferences:
+   *
+   * accessibility.browsewithcaret
+   * - true enables keyboard navigation and selection within web pages using a
+   *   visible caret, false uses normal keyboard navigation with no caret
+   * accessibility.typeaheadfind
+   * - when set to true, typing outside text areas and input boxes will
+   *   automatically start searching for what's typed within the current
+   *   document; when set to false, no search action happens
+   * ui.osk.enabled
+   * - when set to true, subject to other conditions, we may sometimes invoke
+   *   an on-screen keyboard when a text input is focused.
+   *   (Currently Windows-only, and depending on prefs, may be Windows-8-only)
+   * general.autoScroll
+   * - when set to true, clicking the scroll wheel on the mouse activates a
+   *   mouse mode where moving the mouse down scrolls the document downward with
+   *   speed correlated with the distance of the cursor from the original
+   *   position at which the click occurred (and likewise with movement upward);
+   *   if false, this behavior is disabled
+   * general.smoothScroll
+   * - set to true to enable finer page scrolling than line-by-line on page-up,
+   *   page-down, and other such page movements
+   * layout.spellcheckDefault
+   * - an integer:
+   *     0  disables spellchecking
+   *     1  enables spellchecking, but only for multiline text fields
+   *     2  enables spellchecking for all text fields
+   */
+
+  /**
+   * Stores the original value of the spellchecking preference to enable proper
+   * restoration if unchanged (since we're mapping a tristate onto a checkbox).
+   */
+  _storedSpellCheck: 0,
+
+  /**
+   * Returns true if any spellchecking is enabled and false otherwise, caching
+   * the current value to enable proper pref restoration if the checkbox is
+   * never changed.
+   */
+  readCheckSpelling: function ()
+  {
+    var pref = document.getElementById("layout.spellcheckDefault");
+    this._storedSpellCheck = pref.value;
+
+    return (pref.value != 0);
+  },
+
+  /**
+   * Returns the value of the spellchecking preference represented by UI,
+   * preserving the preference's "hidden" value if the preference is
+   * unchanged and represents a value not strictly allowed in UI.
+   */
+  writeCheckSpelling: function ()
+  {
+    var checkbox = document.getElementById("checkSpelling");
+    if (checkbox.checked) {
+      if (this._storedSpellCheck == 2) {
+        return 2;
+      }
+      return 1;
+    }
+    return 0;
+  },
+
+  /**
+   * security.OCSP.enabled is an integer value for legacy reasons.
+   * A value of 1 means OCSP is enabled. Any other value means it is disabled.
+   */
+  readEnableOCSP: function ()
+  {
+    var preference = document.getElementById("security.OCSP.enabled");
+    // This is the case if the preference is the default value.
+    if (preference.value === undefined) {
+      return true;
+    }
+    return preference.value == 1;
+  },
+
+  /**
+   * See documentation for readEnableOCSP.
+   */
+  writeEnableOCSP: function ()
+  {
+    var checkbox = document.getElementById("enableOCSP");
+    return checkbox.checked ? 1 : 0;
+  },
+
+  /**
+   * When the user toggles the layers.acceleration.disabled pref,
+   * sync its new value to the gfx.direct2d.disabled pref too.
+   */
+  updateHardwareAcceleration: function()
+  {
+    if (AppConstants.platform = "win") {
+      var fromPref = document.getElementById("layers.acceleration.disabled");
+      var toPref = document.getElementById("gfx.direct2d.disabled");
+      toPref.value = fromPref.value;
+    }
+  },
+
+  // DATA CHOICES TAB
+
+  /**
+   * Set up or hide the Learn More links for various data collection options
+   */
+  _setupLearnMoreLink: function (pref, element) {
+    // set up the Learn More link with the correct URL
+    let url = Services.prefs.getCharPref(pref);
+    let el = document.getElementById(element);
+
+    if (url) {
+      el.setAttribute("href", url);
+    } else {
+      el.setAttribute("hidden", "true");
+    }
+  },
+
+  /**
+   *
+   */
+  initSubmitCrashes: function ()
+  {
+    this._setupLearnMoreLink("toolkit.crashreporter.infoURL",
+                             "crashReporterLearnMore");
+  },
+
+  /**
+   * The preference/checkbox is configured in XUL.
+   *
+   * In all cases, set up the Learn More link sanely.
+   */
+  initTelemetry: function ()
+  {
+    if (AppConstants.MOZ_TELEMETRY_REPORTING) {
+      this._setupLearnMoreLink("toolkit.telemetry.infoURL", "telemetryLearnMore");
+    }
+  },
+
+  /**
+   * Set the status of the telemetry controls based on the input argument.
+   * @param {Boolean} aEnabled False disables the controls, true enables them.
+   */
+  setTelemetrySectionEnabled: function (aEnabled)
+  {
+    if (AppConstants.MOZ_TELEMETRY_REPORTING) {
+      // If FHR is disabled, additional data sharing should be disabled as well.
+      let disabled = !aEnabled;
+      document.getElementById("submitTelemetryBox").disabled = disabled;
+      if (disabled) {
+        // If we disable FHR, untick the telemetry checkbox.
+        Services.prefs.setBoolPref("toolkit.telemetry.enabled", false);
+      }
+      document.getElementById("telemetryDataDesc").disabled = disabled;
+    }
+  },
+
+  /**
+   * Initialize the health report service reference and checkbox.
+   */
+  initSubmitHealthReport: function () {
+    if (AppConstants.MOZ_TELEMETRY_REPORTING) {
+      this._setupLearnMoreLink("datareporting.healthreport.infoURL", "FHRLearnMore");
+
+      let checkbox = document.getElementById("submitHealthReportBox");
+
+      if (Services.prefs.prefIsLocked(PREF_UPLOAD_ENABLED)) {
+        checkbox.setAttribute("disabled", "true");
+        return;
+      }
+
+      checkbox.checked = Services.prefs.getBoolPref(PREF_UPLOAD_ENABLED);
+      this.setTelemetrySectionEnabled(checkbox.checked);
+    }
+  },
+
+  /**
+   * Update the health report preference with state from checkbox.
+   */
+  updateSubmitHealthReport: function () {
+    if (AppConstants.MOZ_TELEMETRY_REPORTING) {
+      let checkbox = document.getElementById("submitHealthReportBox");
+      Services.prefs.setBoolPref(PREF_UPLOAD_ENABLED, checkbox.checked);
+      this.setTelemetrySectionEnabled(checkbox.checked);
+    }
+  },
+
+  updateOnScreenKeyboardVisibility() {
+    if (AppConstants.platform == "win") {
+      let minVersion = Services.prefs.getBoolPref("ui.osk.require_win10") ? 10 : 6.2;
+      if (Services.vc.compare(Services.sysinfo.getProperty("version"), minVersion) >= 0) {
+        document.getElementById("useOnScreenKeyboard").hidden = false;
+      }
+    }
+  },
+
+  // NETWORK TAB
+
+  /*
+   * Preferences:
+   *
+   * browser.cache.disk.capacity
+   * - the size of the browser cache in KB
+   * - Only used if browser.cache.disk.smart_size.enabled is disabled
+   */
+
+  /**
+   * Displays a dialog in which proxy settings may be changed.
+   */
+  showConnections: function ()
+  {
+    gSubDialog.open("chrome://browser/content/preferences/connection.xul");
+  },
+
+  // Retrieves the amount of space currently used by disk cache
+  updateActualCacheSize: function ()
+  {
+    var actualSizeLabel = document.getElementById("actualDiskCacheSize");
+    var prefStrBundle = document.getElementById("bundlePreferences");
+
+    // Needs to root the observer since cache service keeps only a weak reference.
+    this.observer = {
+      onNetworkCacheDiskConsumption: function(consumption) {
+        var size = DownloadUtils.convertByteUnits(consumption);
+        // The XBL binding for the string bundle may have been destroyed if
+        // the page was closed before this callback was executed.
+        if (!prefStrBundle.getFormattedString) {
+          return;
+        }
+        actualSizeLabel.value = prefStrBundle.getFormattedString("actualDiskCacheSize", size);
+      },
+
+      QueryInterface: XPCOMUtils.generateQI([
+        Components.interfaces.nsICacheStorageConsumptionObserver,
+        Components.interfaces.nsISupportsWeakReference
+      ])
+    };
+
+    actualSizeLabel.value = prefStrBundle.getString("actualDiskCacheSizeCalculated");
+
+    try {
+      var cacheService =
+        Components.classes["@mozilla.org/netwerk/cache-storage-service;1"]
+                  .getService(Components.interfaces.nsICacheStorageService);
+      cacheService.asyncGetDiskConsumption(this.observer);
+    } catch (e) {}
+  },
+
+  // Retrieves the amount of space currently used by offline cache
+  updateActualAppCacheSize: function ()
+  {
+    var visitor = {
+      onCacheStorageInfo: function (aEntryCount, aConsumption, aCapacity, aDiskDirectory)
+      {
+        var actualSizeLabel = document.getElementById("actualAppCacheSize");
+        var sizeStrings = DownloadUtils.convertByteUnits(aConsumption);
+        var prefStrBundle = document.getElementById("bundlePreferences");
+        // The XBL binding for the string bundle may have been destroyed if
+        // the page was closed before this callback was executed.
+        if (!prefStrBundle.getFormattedString) {
+          return;
+        }
+        var sizeStr = prefStrBundle.getFormattedString("actualAppCacheSize", sizeStrings);
+        actualSizeLabel.value = sizeStr;
+      }
+    };
+
+    try {
+      var cacheService =
+        Components.classes["@mozilla.org/netwerk/cache-storage-service;1"]
+                  .getService(Components.interfaces.nsICacheStorageService);
+      var storage = cacheService.appCacheStorage(LoadContextInfo.default, null);
+      storage.asyncVisitStorage(visitor, false);
+    } catch (e) {}
+  },
+
+  updateCacheSizeUI: function (smartSizeEnabled)
+  {
+    document.getElementById("useCacheBefore").disabled = smartSizeEnabled;
+    document.getElementById("cacheSize").disabled = smartSizeEnabled;
+    document.getElementById("useCacheAfter").disabled = smartSizeEnabled;
+  },
+
+  readSmartSizeEnabled: function ()
+  {
+    // The smart_size.enabled preference element is inverted="true", so its
+    // value is the opposite of the actual pref value
+    var disabled = document.getElementById("browser.cache.disk.smart_size.enabled").value;
+    this.updateCacheSizeUI(!disabled);
+  },
+
+  /**
+   * Converts the cache size from units of KB to units of MB and stores it in
+   * the textbox element.
+   */
+  updateCacheSizeInputField()
+  {
+    let cacheSizeElem = document.getElementById("cacheSize");
+    let cachePref = document.getElementById("browser.cache.disk.capacity");
+    cacheSizeElem.value = cachePref.value / 1024;
+    if (cachePref.locked)
+      cacheSizeElem.disabled = true;
+  },
+
+  /**
+   * Updates the cache size preference once user enters a new value.
+   * We intentionally do not set preference="browser.cache.disk.capacity"
+   * onto the textbox directly, as that would update the pref at each keypress
+   * not only after the final value is entered.
+   */
+  updateCacheSizePref()
+  {
+    let cacheSizeElem = document.getElementById("cacheSize");
+    let cachePref = document.getElementById("browser.cache.disk.capacity");
+    // Converts the cache size as specified in UI (in MB) to KB.
+    let intValue = parseInt(cacheSizeElem.value, 10);
+    cachePref.value = isNaN(intValue) ? 0 : intValue * 1024;
+  },
+
+  /**
+   * Clears the cache.
+   */
+  clearCache: function ()
+  {
+    try {
+      var cache = Components.classes["@mozilla.org/netwerk/cache-storage-service;1"]
+                            .getService(Components.interfaces.nsICacheStorageService);
+      cache.clear();
+    } catch (ex) {}
+    this.updateActualCacheSize();
+  },
+
+  /**
+   * Clears the application cache.
+   */
+  clearOfflineAppCache: function ()
+  {
+    Components.utils.import("resource:///modules/offlineAppCache.jsm");
+    OfflineAppCacheHelper.clear();
+
+    this.updateActualAppCacheSize();
+    this.updateOfflineApps();
+  },
+
+  readOfflineNotify: function()
+  {
+    var pref = document.getElementById("browser.offline-apps.notify");
+    var button = document.getElementById("offlineNotifyExceptions");
+    button.disabled = !pref.value;
+    return pref.value;
+  },
+
+  showOfflineExceptions: function()
+  {
+    var bundlePreferences = document.getElementById("bundlePreferences");
+    var params = { blockVisible     : false,
+                   sessionVisible   : false,
+                   allowVisible     : false,
+                   prefilledHost    : "",
+                   permissionType   : "offline-app",
+                   manageCapability : Components.interfaces.nsIPermissionManager.DENY_ACTION,
+                   windowTitle      : bundlePreferences.getString("offlinepermissionstitle"),
+                   introText        : bundlePreferences.getString("offlinepermissionstext") };
+    gSubDialog.open("chrome://browser/content/preferences/permissions.xul",
+                    null, params);
+  },
+
+  // XXX: duplicated in browser.js
+  _getOfflineAppUsage(perm, groups) {
+    let cacheService = Cc["@mozilla.org/network/application-cache-service;1"].
+                       getService(Ci.nsIApplicationCacheService);
+    if (!groups) {
+      try {
+        groups = cacheService.getGroups();
+      } catch (ex) {
+        return 0;
+      }
+    }
+
+    let usage = 0;
+    for (let group of groups) {
+      let uri = Services.io.newURI(group, null, null);
+      if (perm.matchesURI(uri, true)) {
+        let cache = cacheService.getActiveCache(group);
+        usage += cache.usage;
+      }
+    }
+
+    return usage;
+  },
+
+  /**
+   * Updates the list of offline applications
+   */
+  updateOfflineApps: function ()
+  {
+    var pm = Components.classes["@mozilla.org/permissionmanager;1"]
+                       .getService(Components.interfaces.nsIPermissionManager);
+
+    var list = document.getElementById("offlineAppsList");
+    while (list.firstChild) {
+      list.removeChild(list.firstChild);
+    }
+
+    var groups;
+    try {
+      var cacheService = Components.classes["@mozilla.org/network/application-cache-service;1"].
+                         getService(Components.interfaces.nsIApplicationCacheService);
+      groups = cacheService.getGroups();
+    } catch (e) {
+      return;
+    }
+
+    var bundle = document.getElementById("bundlePreferences");
+
+    var enumerator = pm.enumerator;
+    while (enumerator.hasMoreElements()) {
+      var perm = enumerator.getNext().QueryInterface(Components.interfaces.nsIPermission);
+      if (perm.type == "offline-app" &&
+          perm.capability != Components.interfaces.nsIPermissionManager.DEFAULT_ACTION &&
+          perm.capability != Components.interfaces.nsIPermissionManager.DENY_ACTION) {
+        var row = document.createElement("listitem");
+        row.id = "";
+        row.className = "offlineapp";
+        row.setAttribute("origin", perm.principal.origin);
+        var converted = DownloadUtils.
+                        convertByteUnits(this._getOfflineAppUsage(perm, groups));
+        row.setAttribute("usage",
+                         bundle.getFormattedString("offlineAppUsage",
+                                                   converted));
+        list.appendChild(row);
+      }
+    }
+  },
+
+  offlineAppSelected: function()
+  {
+    var removeButton = document.getElementById("offlineAppsListRemove");
+    var list = document.getElementById("offlineAppsList");
+    if (list.selectedItem) {
+      removeButton.setAttribute("disabled", "false");
+    } else {
+      removeButton.setAttribute("disabled", "true");
+    }
+  },
+
+  removeOfflineApp: function()
+  {
+    var list = document.getElementById("offlineAppsList");
+    var item = list.selectedItem;
+    var origin = item.getAttribute("origin");
+    var principal = Services.scriptSecurityManager.createCodebasePrincipalFromOrigin(origin);
+
+    var prompts = Components.classes["@mozilla.org/embedcomp/prompt-service;1"]
+                            .getService(Components.interfaces.nsIPromptService);
+    var flags = prompts.BUTTON_TITLE_IS_STRING * prompts.BUTTON_POS_0 +
+                prompts.BUTTON_TITLE_CANCEL * prompts.BUTTON_POS_1;
+
+    var bundle = document.getElementById("bundlePreferences");
+    var title = bundle.getString("offlineAppRemoveTitle");
+    var prompt = bundle.getFormattedString("offlineAppRemovePrompt", [principal.URI.prePath]);
+    var confirm = bundle.getString("offlineAppRemoveConfirm");
+    var result = prompts.confirmEx(window, title, prompt, flags, confirm,
+                                   null, null, null, {});
+    if (result != 0)
+      return;
+
+    // get the permission
+    var pm = Components.classes["@mozilla.org/permissionmanager;1"]
+                       .getService(Components.interfaces.nsIPermissionManager);
+    var perm = pm.getPermissionObject(principal, "offline-app", true);
+    if (perm) {
+      // clear offline cache entries
+      try {
+        var cacheService = Components.classes["@mozilla.org/network/application-cache-service;1"].
+                           getService(Components.interfaces.nsIApplicationCacheService);
+        var groups = cacheService.getGroups();
+        for (var i = 0; i < groups.length; i++) {
+          var uri = Services.io.newURI(groups[i], null, null);
+          if (perm.matchesURI(uri, true)) {
+            var cache = cacheService.getActiveCache(groups[i]);
+            cache.discard();
+          }
+        }
+      } catch (e) {}
+
+      pm.removePermission(perm);
+    }
+    list.removeChild(item);
+    gAdvancedPane.offlineAppSelected();
+    this.updateActualAppCacheSize();
+  },
+
+  // UPDATE TAB
+
+  /*
+   * Preferences:
+   *
+   * app.update.enabled
+   * - true if updates to the application are enabled, false otherwise
+   * app.update.auto
+   * - true if updates should be automatically downloaded and installed and
+   * false if the user should be asked what he wants to do when an update is
+   * available
+   * extensions.update.enabled
+   * - true if updates to extensions and themes are enabled, false otherwise
+   * browser.search.update
+   * - true if updates to search engines are enabled, false otherwise
+   */
+
+  /**
+   * Selects the item of the radiogroup based on the pref values and locked
+   * states.
+   *
+   * UI state matrix for update preference conditions
+   *
+   * UI Components:                              Preferences
+   * Radiogroup                                  i   = app.update.enabled
+   *                                             ii  = app.update.auto
+   *
+   * Disabled states:
+   * Element           pref  value  locked  disabled
+   * radiogroup        i     t/f    f       false
+   *                   i     t/f    *t*     *true*
+   *                   ii    t/f    f       false
+   *                   ii    t/f    *t*     *true*
+   */
+  updateReadPrefs: function ()
+  {
+    if (AppConstants.MOZ_UPDATER) {
+      var enabledPref = document.getElementById("app.update.enabled");
+      var autoPref = document.getElementById("app.update.auto");
+      var radiogroup = document.getElementById("updateRadioGroup");
+
+      if (!enabledPref.value)   // Don't care for autoPref.value in this case.
+        radiogroup.value="manual";    // 3. Never check for updates.
+      else if (autoPref.value)  // enabledPref.value && autoPref.value
+        radiogroup.value="auto";      // 1. Automatically install updates
+      else                      // enabledPref.value && !autoPref.value
+        radiogroup.value="checkOnly"; // 2. Check, but let me choose
+
+      var canCheck = Components.classes["@mozilla.org/updates/update-service;1"].
+                       getService(Components.interfaces.nsIApplicationUpdateService).
+                       canCheckForUpdates;
+      // canCheck is false if the enabledPref is false and locked,
+      // or the binary platform or OS version is not known.
+      // A locked pref is sufficient to disable the radiogroup.
+      radiogroup.disabled = !canCheck || enabledPref.locked || autoPref.locked;
+
+      if (AppConstants.MOZ_MAINTENANCE_SERVICE) {
+        // Check to see if the maintenance service is installed.
+        // If it is don't show the preference at all.
+        var installed;
+        try {
+          var wrk = Components.classes["@mozilla.org/windows-registry-key;1"]
+                    .createInstance(Components.interfaces.nsIWindowsRegKey);
+          wrk.open(wrk.ROOT_KEY_LOCAL_MACHINE,
+                   "SOFTWARE\\Mozilla\\MaintenanceService",
+                   wrk.ACCESS_READ | wrk.WOW64_64);
+          installed = wrk.readIntValue("Installed");
+          wrk.close();
+        } catch (e) {
+        }
+        if (installed != 1) {
+          document.getElementById("useService").hidden = true;
+        }
+      }
+    }
+  },
+
+  /**
+   * Sets the pref values based on the selected item of the radiogroup.
+   */
+  updateWritePrefs: function ()
+  {
+    if (AppConstants.MOZ_UPDATER) {
+      var enabledPref = document.getElementById("app.update.enabled");
+      var autoPref = document.getElementById("app.update.auto");
+      var radiogroup = document.getElementById("updateRadioGroup");
+      switch (radiogroup.value) {
+        case "auto":      // 1. Automatically install updates for Desktop only
+          enabledPref.value = true;
+          autoPref.value = true;
+          break;
+        case "checkOnly": // 2. Check, but let me choose
+          enabledPref.value = true;
+          autoPref.value = false;
+          break;
+        case "manual":    // 3. Never check for updates.
+          enabledPref.value = false;
+          autoPref.value = false;
+      }
+    }
+  },
+
+  /**
+   * Displays the history of installed updates.
+   */
+  showUpdates: function ()
+  {
+    gSubDialog.open("chrome://mozapps/content/update/history.xul");
+  },
+
+  // ENCRYPTION TAB
+
+  /*
+   * Preferences:
+   *
+   * security.default_personal_cert
+   * - a string:
+   *     "Select Automatically"   select a certificate automatically when a site
+   *                              requests one
+   *     "Ask Every Time"         present a dialog to the user so he can select
+   *                              the certificate to use on a site which
+   *                              requests one
+   */
+
+  /**
+   * Displays the user's certificates and associated options.
+   */
+  showCertificates: function ()
+  {
+    gSubDialog.open("chrome://pippki/content/certManager.xul");
+  },
+
+  /**
+   * Displays a dialog from which the user can manage his security devices.
+   */
+  showSecurityDevices: function ()
+  {
+    gSubDialog.open("chrome://pippki/content/device_manager.xul");
+  },
+
+  observe: function (aSubject, aTopic, aData) {
+    if (AppConstants.MOZ_UPDATER) {
+      switch (aTopic) {
+        case "nsPref:changed":
+          this.updateReadPrefs();
+          break;
+      }
+    }
+  },
+};