<?xml version="1.0"?> <!-- 用于使浮动侧栏获得焦点 --> 
<page id="myAddOnsHide"
      xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
      xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"
      onload="document.getElementById('myAddOnsHide').focus()">
</page>

