<?xml version="1.0"?>
<overlay id="overlay1"
         xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul">
  <commandset id="test_commandset">
    <command id="cmd_test"/>
  </commandset>
  <toolbarbutton id="button_test"
                 command="cmd_test"/>
</overlay>