michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: (function () { // bug 673569 workaround :(
michael@0: 
michael@0: const ALLOW_BG_CAPTURES_MSG = "BrowserNewTabPreloader:allowBackgroundCaptures";
michael@0: 
michael@0: addMessageListener(ALLOW_BG_CAPTURES_MSG, function onMsg(msg) {
michael@0:   removeMessageListener(ALLOW_BG_CAPTURES_MSG, onMsg);
michael@0: 
michael@0:   if (content.document.readyState == "complete") {
michael@0:     setAllowBackgroundCaptures();
michael@0:     return;
michael@0:   }
michael@0: 
michael@0:   // This is the case when preloading is disabled.
michael@0:   addEventListener("load", function onLoad(event) {
michael@0:     if (event.target == content.document) {
michael@0:       removeEventListener("load", onLoad, true);
michael@0:       setAllowBackgroundCaptures();
michael@0:     }
michael@0:   }, true);
michael@0: });
michael@0: 
michael@0: function setAllowBackgroundCaptures() {
michael@0:   content.document.documentElement.setAttribute("allow-background-captures",
michael@0:                                                 "true");
michael@0: }
michael@0: 
michael@0: })();