diff -r 000000000000 -r 6474c204b198 toolkit/mozapps/extensions/test/xpcshell/test_bug425657.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/toolkit/mozapps/extensions/test/xpcshell/test_bug425657.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,27 @@
+/* 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/.
+ */
+
+const ADDON = "test_bug425657";
+const ID = "bug425657@tests.mozilla.org";
+
+function run_test()
+{
+  // Setup for test
+  do_test_pending();
+  createAppInfo("xpcshell@tests.mozilla.org", "XPCShell", "1");
+
+  // Install test add-on
+  startupManager();
+  installAllFiles([do_get_addon(ADDON)], function() {
+    restartManager();
+    AddonManager.getAddonByID(ID, function(addon) {
+      do_check_neq(addon, null);
+      do_check_eq(addon.name, "Deutsches W\u00f6rterbuch");
+      do_check_eq(addon.name.length, 20);
+
+      do_execute_soon(do_test_finished);
+    });
+  });
+}