function runTest() {
  var worker = new Worker("navigator_worker.js");

  worker.onmessage = function(event) {
    var args = JSON.parse(event.data);

    if (args.name == "testFinished") {
      SimpleTest.finish();
      return;
    }

    if (typeof navigator[args.name] == "undefined") {
      ok(false, "Navigator has no '" + args.name + "' property!");
      return;
    }

    if (args.name === "languages") {
      is(navigator.languages.toString(), args.value.toString(), "languages matches");
      return;
    }

    if (args.name === "storage") {
      is(typeof navigator.storage, typeof args.value, "storage type matches");
      return;
    }

    if (args.name === "connection") {
      is(typeof navigator.connection, typeof args.value, "connection type matches");
      return;
    }

    is(navigator[args.name], args.value,
       "Mismatched navigator string for " + args.name + "!");
  };

  worker.onerror = function(event) {
    ok(false, "Worker had an error: " + event.message);
    SimpleTest.finish();
  }

  var version = SpecialPowers.Cc["@mozilla.org/xre/app-info;1"].getService(SpecialPowers.Ci.nsIXULAppInfo).version;
  var isNightly = version.endsWith("a1");
  var isRelease = !version.includes("a");

  worker.postMessage({ isNightly, isRelease });
}

SpecialPowers.pushPrefEnv({"set": [["dom.netinfo.enabled", true]]}, runTest);
SimpleTest.waitForExplicitFinish();
