diff -r 000000000000 -r 6474c204b198 dom/webidl/SpeechSynthesis.webidl
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/webidl/SpeechSynthesis.webidl	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,24 @@
+/* -*- 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
+ * http://dvcs.w3.org/hg/speech-api/raw-file/tip/speechapi.html
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+[Pref="media.webspeech.synth.enabled"]
+interface SpeechSynthesis {
+  readonly attribute boolean pending;
+  readonly attribute boolean speaking;
+  readonly attribute boolean paused;
+
+  void speak(SpeechSynthesisUtterance utterance);
+  void cancel();
+  void pause();
+  void resume();
+  sequence<SpeechSynthesisVoice> getVoices();
+};