stdin.xul

<?xml version="1.0" encoding="UTF-8"?>
<?xml-stylesheet href="chrome://global/skin/" type="text/css"?>

<window id="foo" orient="vertical"
      xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul">

  <script type="application/javascript"><![CDATA[
    onload = function onload(event) {
      let iframe = document.getElementById("foo-iframe");
      iframe.addEventListener("DOMContentLoaded", function (event) {
        if (this != event.originalTarget)
          return;
        doStuffWith(this.contentWindow);
      }, true);
      iframe.src = "http://www.google.com/";
    }
  ]]></script>

  <iframe id="foo-iframe" type="content"/>
</window>

<!-- vim: set sw=2 sts=2 et: -->