test_navigator_buildID.html

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<!DOCTYPE HTML>

<html>

<!--

https://bugzilla.mozilla.org/show_bug.cgi?id=583181

-->

<head>

  <title>Test for Bug 583181</title>

  <script src="/tests/SimpleTest/SimpleTest.js"></script>

  <script src="/tests/SimpleTest/ChromeTask.js"></script>

  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />

</head>

<body onload="onLoad()">

<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=583181">Mozilla Bug 583181</a>

<p id="display"></p>

<div id="content" style="display: none">

</div>

<pre id="test">

<script class="testbody" type="text/javascript">

"use strict";

SimpleTest.waitForExplicitFinish();

const LEGACY_BUILD_ID = 20181001000000;

//

// Access navigator.buildID from unprivileged web content.

//

var isOK = false;

try {

  var contentBuildID = navigator.buildID;

  isOK = true;

} catch (ex) {

ok(isOK, "navigator.buildID should never throw");

is(typeof(contentBuildID), "string", "navigator.buildID should be a string");

is(+contentBuildID, LEGACY_BUILD_ID,

   "navigator.buildID should be spoofed in content");

async function onLoad() {

//

  // Access navigator.buildID from chrome.

//

  let chromeBuildID = await ChromeTask.spawn(null, () => {

    const browser = Services.wm.getMostRecentBrowserWindow();

    return browser.navigator.buildID;

});

  ok(+chromeBuildID > LEGACY_BUILD_ID,

     `navigator.buildID should be exposed in chrome - got "${chromeBuildID}"`);

//

  // Access navigator.buildID from mozilla.org.

//

  let mozillaBuildID = await getMozillaBuildID();

  ok(+mozillaBuildID > LEGACY_BUILD_ID,

     `navigator.buildID should be exposed on mozilla.org ` +

     `- got "${mozillaBuildID}"`);

  is(chromeBuildID, mozillaBuildID,

     "navigator.buildID should be the same in chrome and on mozilla.org");

//

  // Access navigator.buildID from mozilla.org when resisting fingerprinting.

//

  await SpecialPowers.pushPrefEnv(

    {"set": [["privacy.resistFingerprinting", true]]});

  let resistBuildID = await getMozillaBuildID();

  is(+resistBuildID, LEGACY_BUILD_ID,

     "navigator.buildID should be spoofed on mozilla.org when " +

     "resisting fingerprinting");

  SimpleTest.finish();

async function getMozillaBuildID() {

  let iframe = document.getElementById("mozillaIFrame");

  await new Promise(resolve => {

    iframe.addEventListener("load", resolve, { once: true });

    SpecialPowers.spawn(iframe, [], () => this.content.location.reload());

});

  return SpecialPowers.spawn(

    iframe, [], () => this.content.wrappedJSObject.navigator.buildID);

</script>

</pre>

<iframe id="mozillaIFrame" src="https://www.mozilla.org/" />

</body>

</html>