title: Firefox not able to enumerate document.styleSheets[].cssRules[]
body: <p>Here is the code:</p>
  
  <ul>
  <li><a href="http://jsfiddle.net/salman/2hyYg/" rel="noreferrer">http://jsfiddle.net/salman/2hyYg/</a></li>
  <li><a href="http://jsfiddle.net/salman/2hyYg/show/" rel="noreferrer">http://jsfiddle.net/salman/2hyYg/show/</a></li>
  </ul>
  
  <p>You'll notice the <code>alert(document.styleSheets[x].cssRules.length)</code> fails with a "security exception". Any workaround for this. I am asking because there are a couple of "CSS lazy loading" classes out there that use this feature to detect if the CSS document is loaded. </p>
  
  <p>Also: is the security exception a correct behavior/does it conform to standards?</p>