The Tor Browser / file revision

 /* -*- 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://www.whatwg.org/specs/web-apps/current-work/#texttrackcuelist

  */

 [Pref="media.webvtt.enabled"]

 interface TextTrackCueList {

   readonly attribute unsigned long length;

   getter VTTCue (unsigned long index);

   VTTCue? getCueById(DOMString id);

 };