The Tor Browser / file revision

 /**

  * Any copyright is dedicated to the Public Domain.

  * http://creativecommons.org/publicdomain/zero/1.0/

  */

 var supportedProps = [

   "appCodeName",

   "appName",

   "appVersion",

   "platform",

   "product",

   "taintEnabled",

   "userAgent",

   "onLine"

 ];

 for (var prop in navigator) {

   // Make sure the list is current!

   if (supportedProps.indexOf(prop) == -1) {

     throw "Navigator has the '" + prop + "' property that isn't in the list!";

   }

 }

 var obj;

 for (var index = 0; index < supportedProps.length; index++) {

   var prop = supportedProps[index];

   if (typeof navigator[prop] == "undefined") {

     throw "Navigator has no '" + prop + "' property!";

   }

   obj = {

     name:  prop,

     value: prop === "taintEnabled" ? navigator[prop]() : navigator[prop]

   };

   postMessage(JSON.stringify(obj));

 }

 obj = {

   name: "testFinished"

 };

 postMessage(JSON.stringify(obj));