diff -r 000000000000 -r 6474c204b198 dom/webidl/IDBEnvironment.webidl
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/webidl/IDBEnvironment.webidl	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,19 @@
+/* -*- 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/.
+ *
+ * The origin of this IDL file is:
+ * https://dvcs.w3.org/hg/IndexedDB/raw-file/tip/Overview.html
+ */
+
+[NoInterfaceObject]
+interface IDBEnvironment {
+    //[Throws] readonly    attribute IDBFactory indexedDB;
+    [Throws] readonly    attribute IDBFactory? indexedDB;
+};
+
+// Mozilla-specific stuff
+partial interface IDBEnvironment {
+    [Throws] readonly    attribute IDBFactory? mozIndexedDB;
+};