title: Can I have an XUL panel without a shadow in my Firefox extension?
body: <p>XUL panels in a Firefox extension overlay always come with a shadow for free. How can I remove this shadow?</p>
  
  <p><em>Example code for the shadow effect I don't want:</em></p>
  
  <pre><code>&lt;popupset&gt;
      &lt;panel id="popuppanel" width="500" noautohide="true"&gt;
          &lt;vbox&gt;
              &lt;label value="test"/&gt;
              &lt;label value=""/&gt;
              &lt;label value=""/&gt;
              &lt;label value=""/&gt;
          &lt;/vbox&gt;
      &lt;/panel&gt;
  &lt;/popupset&gt;
  </code></pre>
  
  <p><em>And a screenshot:</em></p>
  
  <p><a href="http://img124.imageshack.us/img124/7766/shadowj.png" title="Example of shadow effect I don&#39;t want.">Example image of shadow effect I don&#39;t want. http://img124.imageshack.us/img124/7766/shadowj.png</a></p>