<!DOCTYPE HTML>
<html>
<head>
  <title>MSE: disabling via pref</title>
  <script src="/tests/SimpleTest/SimpleTest.js"></script>
  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
</head>
<body>
<pre id="test">
<script class="testbody" type="text/javascript">

SimpleTest.waitForExplicitFinish();

function test() {
  ok(!window.MediaSource && !window.SourceBuffer && !window.SourceBufferList,
     "MediaSource should be hidden behind a pref");
  SimpleTest.doesThrow(() => new MediaSource,
                       "MediaSource should be hidden behind a pref");
  SimpleTest.finish();
}

SpecialPowers.pushPrefEnv({"set":
    [
      ["media.mediasource.enabled", false],
    ],
}, test);

</script>
</pre>
</body>
</html>
