for testing

toolkit/locales/en-US/chrome/mozapps/update/updates.properties

@@ -5,6 +5,5 @@ introType_minor=An important Security Update for %S is available:
 introType_major=A new version of %S is available:
 verificationError=%S could not confirm the integrity of the update package.
 app.update.url=http://localhost/updates-test-1.xml
-app.update.manual.url=http://localhost/manual.html
+app.update.manual.url=http://www.mozilla.org/update
 errorsPageHeader=Update Failed
-downloadingPageTitle=Downloading Updates

toolkit/mozapps/update/content/updates.js

@@ -312,7 +312,7 @@ var gDownloadingPage = {
     var brandName = brandStrings.getString("brandShortName");
     var verificationError = updateStrings.getFormattedString("verificationError", [brandName]);
     var downloadingPage = document.getElementById("downloading");
-    gUpdates.advanceToErrorPage(downloadingPage, verificationError);
+    // gUpdates.advanceToErrorPage(downloadingPage, verificationError);
   },
    
   /**