diff --git a/mozilla/suite/browser/browser-prefs.js b/mozilla/suite/browser/browser-prefs.js
index 506b0d47cb2..ccf73723df0 100644
--- a/mozilla/suite/browser/browser-prefs.js
+++ b/mozilla/suite/browser/browser-prefs.js
@@ -225,8 +225,8 @@ pref("app.vendorURL", "chrome://branding/locale/brand.properties");
 
 // App-specific update preferences
 
-// Whether or not app updates are enabled - false initally for SeaMonkey
-pref("app.update.enabled", false);
+// Whether or not app updates are enabled
+pref("app.update.enabled", true);
  
 // This preference turns on app.update.mode and allows automatic download and
 // install to take place. We use a separate boolean toggle for this to make
diff --git a/mozilla/suite/common/pref/pref-smartupdate.js b/mozilla/suite/common/pref/pref-smartupdate.js
index 0e794251070..31951e335f6 100644
--- a/mozilla/suite/common/pref/pref-smartupdate.js
+++ b/mozilla/suite/common/pref/pref-smartupdate.js
@@ -40,8 +40,7 @@
 function Startup()
 {
   toggleFrequency("extensions");
-  // disabled until SM updates are available
-  // toggleFrequency("app");
+  toggleFrequency("app");
 }
 
 function toggleFrequency(aType)
@@ -53,9 +52,3 @@ function toggleFrequency(aType)
     !document.getElementById(aType + ".update.enabled").value ||
     document.getElementById(aType + ".update.interval").locked;
 }
-
-function toEM()
-{
-  toOpenWindowByType("Extension:Manager",
-    "chrome://mozapps/content/extensions/extensions.xul");
-}
diff --git a/mozilla/suite/common/pref/pref-smartupdate.xul b/mozilla/suite/common/pref/pref-smartupdate.xul
index 11202a6d1bb..aefc854a4f3 100644
--- a/mozilla/suite/common/pref/pref-smartupdate.xul
+++ b/mozilla/suite/common/pref/pref-smartupdate.xul
@@ -83,16 +83,14 @@
 
         <rows>
           <row>
-            <!-- disabled until SM updates are available -->
             <checkbox id="appUpdatesEnabled" label="&appUpdates.label;"
-                      accesskey="&appUpdates.accesskey;" disabled="true"
+                      accesskey="&appUpdates.accesskey;"
                       preference="app.update.enabled"/>
-            <!-- disabled until SM updates are available -->
             <radiogroup id="appUpdateFrequency" orient="horizontal" 
                         preference="app.update.interval">
-              <radio id="appFreqDaily" label="&daily.label;" disabled="true"
+              <radio id="appFreqDaily" label="&daily.label;"
                      accesskey="&appDaily.accesskey;" value="86400"/>
-              <radio id="appFreqWeekly" label="&weekly.label;" disabled="true"
+              <radio id="appFreqWeekly" label="&weekly.label;"
                      accesskey="&appWeekly.accesskey;" value="604800"/>
             </radiogroup>
           </row>
@@ -111,7 +109,6 @@
           </row>
         </rows>
       </grid>
-      <description>&appUpdatesDisabled.desc;</description>
       <vbox align="end">
         <button id="startAddonManager" oncommand="toEM();"
                 label="&addonManagerButton.label;"
diff --git a/mozilla/suite/common/utilityOverlay.js b/mozilla/suite/common/utilityOverlay.js
index f829c22cfc0..e669bcc8fea 100644
--- a/mozilla/suite/common/utilityOverlay.js
+++ b/mozilla/suite/common/utilityOverlay.js
@@ -58,6 +58,7 @@ const kProxyManual = ["network.proxy.ftp",
                       "network.proxy.socks",
                       "network.proxy.ssl"];
 var gShowBiDi = false;
+var gUtilityBundle = null;
 
 function toggleOfflineStatus()
 {
@@ -419,6 +420,74 @@ function goReleaseNotes()
   catch (ex) { dump(ex); }
 }
 
+function checkForUpdates()
+{
+  var um = Components.classes["@mozilla.org/updates/update-manager;1"]
+                     .getService(Components.interfaces.nsIUpdateManager);
+  var prompter = Components.classes["@mozilla.org/updates/update-prompt;1"]
+                           .createInstance(Components.interfaces.nsIUpdatePrompt);
+
+  // If there's an update ready to be applied, show the "Update Downloaded"
+  // UI instead and let the user know they have to restart the browser for
+  // the changes to be applied. 
+  if (um.activeUpdate && um.activeUpdate.state == "pending")
+    prompter.showUpdateDownloaded(um.activeUpdate);
+  else
+    prompter.checkForUpdates();
+}
+
+function updateCheckUpdatesItem()
+{
+  var updates = Components.classes["@mozilla.org/updates/update-service;1"]
+                          .getService(Components.interfaces.nsIApplicationUpdateService);
+  var um = Components.classes["@mozilla.org/updates/update-manager;1"]
+                     .getService(Components.interfaces.nsIUpdateManager);
+  
+  // Disable the UI if the update enabled pref has been locked by the
+  // administrator or if we cannot update for some other reason.
+  var checkForUpdates = document.getElementById("checkForUpdates");
+  var canUpdate = updates.canUpdate;
+  checkForUpdates.setAttribute("disabled", !canUpdate);
+  if (!canUpdate)
+    return;
+
+  if (!gUtilityBundle)
+    gUtilityBundle = document.getElementById("bundle_utilityOverlay");
+  
+  // By default, show "Check for Updates..."
+  var key = "default";
+  if (um.activeUpdate) {
+    switch (um.activeUpdate.state) {
+    case "downloading":
+      // If we're downloading an update at present, show the text:
+      // "Downloading Firefox x.x..." otherwise we're paused, and show
+      // "Resume Downloading Firefox x.x..."
+      key = updates.isDownloading ? "downloading" : "resume";
+      break;
+    case "pending":
+      // If we're waiting for the user to restart, show: "Apply Downloaded
+      // Updates Now..."
+      key = "pending";
+      break;
+    }
+  }
+
+  // If there's an active update, substitute its name into the label
+  // we show for this item, otherwise display a generic label.
+  if (um.activeUpdate && um.activeUpdate.name)
+    checkForUpdates.label = gUtilityBundle.getFormattedString("updatesItem_" + key,
+                                                              [activeUpdate.name]);
+  else
+    checkForUpdates.label = gUtilityBundle.getString("updatesItem_" + key + "Fallback");
+
+  checkForUpdates.accesskey = gUtilityBundle.getString("updatesItem_" + key + "AccessKey");
+
+  if (um.activeUpdate && updates.isDownloading)
+    checkForUpdates.setAttribute("loading", "true");
+  else
+    checkForUpdates.removeAttribute("loading");
+}
+
 // update menu items that rely on focus
 function goUpdateGlobalEditMenuItems()
 {
diff --git a/mozilla/suite/common/utilityOverlay.xul b/mozilla/suite/common/utilityOverlay.xul
index 8ab468ddb54..181ee8d74a4 100644
--- a/mozilla/suite/common/utilityOverlay.xul
+++ b/mozilla/suite/common/utilityOverlay.xul
@@ -23,6 +23,11 @@
   <script type="application/x-javascript"
           src="chrome://help/content/contextHelp.js"/>
 
+  <stringbundleset id="stringbundleset">
+    <stringbundle id="bundle_utilityOverlay"
+                  src="chrome://communicator/locale/utilityOverlay.properties"/>
+  </stringbundleset>
+
   <!-- online/offline status indicators -->   
   <broadcaster id="Communicator:WorkMode"
                label="&offlineGoOfflineCmd.label;"
@@ -290,7 +295,7 @@
   <menu id="menu_Help"
         label="&helpMenu.label;"
         accesskey="&helpMenu.accesskey;">
-    <menupopup id="helpPopup">
+    <menupopup id="helpPopup" onpopupshowing="updateCheckUpdatesItem();">
       <menuitem label="&openHelpCmd.label;"
                 accesskey="&openHelpCmd.accesskey;"
                 id="help"
@@ -302,6 +307,11 @@
                 id="releaseUrl"
                 oncommand="goReleaseNotes();"/>
 
+      <menuseparator id="menu_HelpUpdatesSeparator"/>
+
+      <menuitem accesskey="&updateCmd.accesskey;" label="&updateCmd.label;"
+                id="checkForUpdates" oncommand="checkForUpdates();"/>
+
       <menuseparator id="menu_HelpAboutSeparator"/>
 
       <menuitem class="about"
diff --git a/mozilla/suite/locales/en-US/chrome/common/pref/pref-smartupdate.dtd b/mozilla/suite/locales/en-US/chrome/common/pref/pref-smartupdate.dtd
index 2cdded359c7..0389dba73e2 100644
--- a/mozilla/suite/locales/en-US/chrome/common/pref/pref-smartupdate.dtd
+++ b/mozilla/suite/locales/en-US/chrome/common/pref/pref-smartupdate.dtd
@@ -18,6 +18,5 @@
 <!ENTITY extensionsUpdates.accesskey          "n">
 <!ENTITY extensionsDaily.accesskey            "i">
 <!ENTITY extensionsWeekly.accesskey           "k">
-<!ENTITY appUpdatesDisabled.desc              "Automatic updates to &brandShortName; are not currently available. This feature is intended for implementation before the next release.">
 <!ENTITY addonManagerButton.label             "Add-on Manager">
 <!ENTITY addonManagerButton.accesskey         "M">
diff --git a/mozilla/suite/locales/en-US/chrome/common/utilityOverlay.dtd b/mozilla/suite/locales/en-US/chrome/common/utilityOverlay.dtd
index bc90dca29da..e8a90a90610 100644
--- a/mozilla/suite/locales/en-US/chrome/common/utilityOverlay.dtd
+++ b/mozilla/suite/locales/en-US/chrome/common/utilityOverlay.dtd
@@ -62,6 +62,8 @@
 
 <!ENTITY releaseCmd.label				"Release Notes">
 <!ENTITY releaseCmd.accesskey                   "N">
+<!ENTITY updateCmd.label                        "Check for Updates...">
+<!ENTITY updateCmd.accesskey                    "C">
 <!ENTITY aboutCmd.label					"About &brandShortName;">
 <!ENTITY aboutCmd.accesskey				"A">
 <!ENTITY aboutCommPluginsCmd.label			"About Plugins">
diff --git a/mozilla/suite/locales/en-US/chrome/common/utilityOverlay.properties b/mozilla/suite/locales/en-US/chrome/common/utilityOverlay.properties
index a006525c8cd..0dfcd6ff86c 100644
--- a/mozilla/suite/locales/en-US/chrome/common/utilityOverlay.properties
+++ b/mozilla/suite/locales/en-US/chrome/common/utilityOverlay.properties
@@ -1,9 +1,24 @@
-
+# Online/offline tooltips
 onlineTooltip0=You are online (proxy: none). Click the icon to go offline.
 onlineTooltip1=You are online (proxy: manual). Click the icon to go offline.
 onlineTooltip2=You are online (proxy: auto URL). Click the icon to go offline.
 onlineTooltip4=You are online (proxy: auto discover). Click the icon to go offline.
 offlineTooltip=You are offline. Click the icon to go online.
 
+# Popup menus
 popupMenuShow=Show %S
 popupAllow=Allow popups from %S
+
+# Check for Updates
+updatesItem_default=Check for Updates...
+updatesItem_defaultFallback=Check for Updates...
+updatesItem_defaultAccessKey=C
+updatesItem_downloading=Downloading %S...
+updatesItem_downloadingFallback=Downloading Update...
+updatesItem_downloadingAccessKey=D
+updatesItem_resume=Resume Downloading %S...
+updatesItem_resumeFallback=Resume Downloading Update...
+updatesItem_resumeAccessKey=D
+updatesItem_pending=Apply Downloaded Update Now...
+updatesItem_pendingFallback=Apply Downloaded Update Now...
+updatesItem_pendingAccessKey=U