diff -r 000000000000 -r 6474c204b198 dom/interfaces/base/nsIDOMScreen.idl
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/interfaces/base/nsIDOMScreen.idl	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,29 @@
+/* -*- 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/. */
+
+#include "nsIDOMEventTarget.idl"
+
+[scriptable, builtinclass, uuid(e732649a-4f78-4ded-abe1-dbdc36fd59d3)]
+interface nsIDOMScreen : nsIDOMEventTarget
+{
+  readonly attribute long             top;
+  readonly attribute long             left;
+  readonly attribute long             width;
+  readonly attribute long             height;
+  readonly attribute long             pixelDepth;
+  readonly attribute long             colorDepth;
+  readonly attribute long             availWidth;
+  readonly attribute long             availHeight;
+  readonly attribute long             availLeft;
+  readonly attribute long             availTop;
+
+  /**
+   * Returns the current screen orientation.
+   * Can be: landscape-primary, landscape-secondary,
+   *         portrait-primary or portrait-secondary.
+   */
+  [binaryname(SlowMozOrientation)]
+  readonly attribute DOMString       mozOrientation;
+};