diff -r 000000000000 -r 6474c204b198 dom/webidl/External.webidl
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/webidl/External.webidl	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,18 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* 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/.
+ */
+
+[JSImplementation="@mozilla.org/sidebar;1"]
+interface External
+{
+  void AddSearchProvider(DOMString aDescriptionURL);
+  unsigned long IsSearchProviderInstalled(DOMString aSearchURL);
+};
+
+// Mozilla extension
+partial interface External {
+  void addSearchEngine(DOMString engineURL, DOMString iconURL,
+                       DOMString suggestedTitle, DOMString suggestedCategory);
+};