file_notification_openWindow.html

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  <title>Bug 1578070</title>

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<pre id="test"></pre>

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

window.onload = () => {

  navigator.serviceWorker.ready.then(() => {

    // Open and close a new window.

    window.open("https://example.org/").close();

    // If we make it here, then we didn't crash. Tell the worker we're done.

    navigator.serviceWorker.controller.postMessage("DONE");

    // We're done!

    window.close();

});

</script>

</pre>

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