gecko-dev/dom/base/test/test_bug1281963.html

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<!DOCTYPE HTML>
<html>
<!--
https://bugzilla.mozilla.org/1281963
-->
<head>
<meta http-equiv="content-type" content="text/html; charset=utf-8">
<title>Test for Bug 1281963</title>
<script src="/tests/SimpleTest/SimpleTest.js"></script>
<link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
</head>
<body>
<p id="display"></p>
<div id="content"></div>
<script class="testbody" type="application/javascript">
// __setPref(key, value)__.
// Set a pref value asynchronously, returning a promise that resolves
// when it succeeds.
let setPref = function(key, value) {
return SpecialPowers.pushPrefEnv({"set": [[key, value]]});
};
// Run a test to see that we don't expose the supported mimeTypes
// or installed plugins when "privacy.resistFingerprinting" is active.
add_task(async function() {
let exampleMimeType = undefined,
examplePlugin = undefined;
// Disable fingerprinting resistance.
await setPref("privacy.resistFingerprinting", false);
// Depending on the testing platform, we may have at least
// one mimeType and plugin available.
exampleMimeType = navigator.mimeTypes[0];
examplePlugin = navigator.plugins[0];
// First check that we can retrieve mimeType or plugin by name and that
// the array length is nonzero.
if (exampleMimeType) {
isnot(navigator.mimeTypes[exampleMimeType.type], undefined, "Should reveal mime type");
isnot(navigator.mimeTypes.length, 0, "navigator.mimeTypes.length should be nonzero");
}
if (examplePlugin) {
isnot(navigator.plugins[examplePlugin.name], undefined, "Should reveal plugin");
isnot(navigator.plugins.length, 0, "navigator.plugins.length should be nonzero");
}
// Now test with fingerprinting resistance enabled
await setPref("privacy.resistFingerprinting", true);
if (exampleMimeType) {
is(navigator.mimeTypes[exampleMimeType.type], undefined, "Don't reveal mime type");
}
is(navigator.mimeTypes[0], undefined, "Don't reveal mime type");
is(navigator.mimeTypes.length, 0, "navigator.mimeTypes.length should be 0");
if (examplePlugin) {
is(navigator.plugins[examplePlugin.name], undefined, "Don't reveal plugin");
}
is(navigator.plugins[0], undefined, "Don't reveal plugin");
is(navigator.plugins.length, 0, "navigator.plugins.length should be 0");
});
</script>
</body>
</html>