The Tor Browser / file revision

 /* 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/. */

 function onOK() {

   window.arguments[0].out = {

     video: document.getElementById("video").selectedItem.value,

     audio: document.getElementById("audio").selectedItem.value

   };

   return true;

 }

 function onLoad() {

   let videoDevices = window.arguments[0].videoDevices;

   if (videoDevices.length) {

     let videoMenu = document.getElementById("video");

     for (let i = 0; i < videoDevices.length; i++) {

       videoMenu.appendItem(videoDevices[i].name, i);

     }

     videoMenu.selectedIndex = 1;

   } else {

     document.getElementById("videoGroup").hidden = true;

   }

   let audioDevices = window.arguments[0].audioDevices;

   if (audioDevices.length) {

     let audioMenu = document.getElementById("audio");

     for (let i = 0; i < audioDevices.length; i++) {

       audioMenu.appendItem(audioDevices[i].name, i);

     }

     audioMenu.selectedIndex = 1;

   } else {

     document.getElementById("audioGroup").hidden = true;

   }

   window.sizeToContent();

 }