fixup! Bug 4234: Use the Firefox Update Process for Tor Browser.

Bug 41668: Port some updater patches to Base Browser

Move the check on the update package version to this other commit.

toolkit/mozapps/update/updater/updater.cpp

@@ -2807,8 +2807,14 @@ static void UpdateThreadFunc(void* param) {
         if (ReadMARChannelIDs(updateSettingsPath, &MARStrings) != OK) {
           rv = UPDATE_SETTINGS_FILE_CHANNEL;
         } else {
+#  ifdef BASE_BROWSER_VERSION_QUOTED
+          // Use the base browser version to prevent downgrade attacks.
+          const char* appVersion = BASE_BROWSER_VERSION_QUOTED;
+#  else
+          const char* appVersion = MOZ_APP_VERSION;
+#  endif
           rv = gArchiveReader.VerifyProductInformation(
-              MARStrings.MARChannelID.get(), MOZ_APP_VERSION);
+              MARStrings.MARChannelID.get(), appVersion);
         }
       }
     }