test_iframe.html - mozsearch

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<!doctype html>

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

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

<body>

<script>

  add_task(async function() {

    await SpecialPowers.pushPrefEnv({

      "set": [["privacy.resistFingerprinting", true]],

});

    is(screen.width, window.innerWidth, "Width should be spoofed");

    is(screen.height, window.innerHeight, "Height should be spoofed");

    let iframe = document.createElement("iframe");

    document.body.appendChild(iframe);

    is(iframe.contentWindow.screen.width, iframe.contentWindow.innerWidth, "Width should be spoofed in iframe");

    is(iframe.contentWindow.screen.height, iframe.contentWindow.innerHeight, "Height should be spoofed in iframe");

});

</script>

</body>