title: What unique features does Firebug have that are not built-in to Firefox?
body: <p>I just cleaned my Firefox addons and wondered: </p>
  
  <ul>
  <li><p>Which features does Firebug have that make it unique? </p></li>
  <li><p>Which features are available in both Firebug and the Firefox Developer Tools?  </p></li>
  </ul>