      LOG("Checker:getUpdateURL - update URL: " + url);
      return url;
    },
+@@ -3265,17 +3101,17 @@ Downloader.prototype = {
+         // We only need to explicitly show the prompt if this is a background
+         // download, since otherwise some kind of UI is already visible and
+         // that UI will notify.
+         if (this.background)
+           shouldShowPrompt = !getPref("getBoolPref", PREF_APP_UPDATE_STAGE_ENABLED, false);
+ 
+         // Tell the updater.exe we're ready to apply.
+         writeStatusFile(getUpdatesDir(), state);
+-        writeVersionFile(getUpdatesDir(), this._update.appVersion);
++        writeVersionFile(getUpdatesDir(), this._update.platformVersion);
+         this._update.installDate = (new Date()).getTime();
+         this._update.statusText = gUpdateBundle.GetStringFromName("installPending");
+       }
+       else {
+         LOG("Downloader:onStopRequest - download verification failed");
+         state = STATE_DOWNLOAD_FAILED;
+ 
+         // TODO: use more informative error code here
 diff -r e3e008015298 toolkit/xre/nsUpdateDriver.cpp
 --- a/toolkit/xre/nsUpdateDriver.cpp	Wed Jan 23 11:46:06 2013 -0800
-+++ b/toolkit/xre/nsUpdateDriver.cpp	Mon Feb 11 15:45:27 2013 +0100
++++ b/toolkit/xre/nsUpdateDriver.cpp	Tue Feb 12 07:50:01 2013 +0100
 @@ -608,58 +608,43 @@ ApplyUpdate(nsIFile *greDir, nsIFile *up
    
    nsCAutoString updaterPath;

   nsAutoString updateDirPathW;
   rv = updateDir->GetPath(updateDirPathW);
 
@@ -826,16 +811,19 @@ ProcessUpdates(nsIFile *greDir, nsIFile 
     if (backgroundUpdate && *backgroundUpdate) {
       restart = false;
       pid = &dummyPID;

diff -r e3e008015298 browser/app/profile/firefox.js
--- a/browser/app/profile/firefox.js	Wed Jan 23 11:46:06 2013 -0800
+++ b/browser/app/profile/firefox.js	Tue Feb 12 07:50:01 2013 +0100
@@ -112,21 +112,20 @@ pref("app.update.cert.maxErrors", 5);
 // present the following conditions apply for a successful update check:
 // 1. the uri scheme must be https
