window_maximized_persist.xhtml

Enable keyboard shortcuts

<?xml version="1.0"?>

<?xml-stylesheet href="chrome://global/skin" type="text/css"?>

<window title="Window Open Test"

        xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"

        height="300"

        width="300"

        sizemode="normal"

        id="window"

        persist="height width sizemode">

<script type="application/javascript"><![CDATA[

  window.addEventListener("sizemodechange", () => {

    window.arguments[0].postMessage("sizemodechange", "*");

});

]]></script>

</window>