title: What do the FireBug DOM colors mean?
body: <p>I'm confused with these colors.
  I noticed there are 4 colors showing in the left hand column of FireBug DOM tree:</p>
  
  <ol>
  <li>Bold black</li>
  <li>Black</li>
  <li>Bold green</li>
  <li>Green</li>
  </ol>
  
  <p>In the right hand column:</p>
  
  <ol>
  <li>Blue</li>
  <li>Red</li>
  <li>Bold green</li>
  <li>Green</li>
  <li>Multiple color elements representing object structures.</li>
  </ol>
  
  <p>What do this colors represent? And why, e.g, I can access window.document.URL and I can't access window.document.body in Console even though they are both in the "not-bold black" category in the DOM tree?</p>
  
  <p>Thanks a lot</p>