<?xml version="1.0"?>
<overlay xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul">
  <script type="application/javascript">
  <![CDATA[
    addEventListener("load", function() {
      let I = {};
      Components.utils.import("resource://instrument/instrument.jsm", I);
      I.Instrument(window);
    }, false);
  ]]>
  </script>
</overlay>
