FirePath is a very cool Firebug plugin that adds the ability to search the HTML tree using XPath or CSS Selectors. It filters the actual Firebug DOM tree so you can then act on that element in all the normal Firebug ways (view DOM, inspect, etc).

Here is a screenshot:

Unfortunately FirePath only supports native CSS Selectors, and most of the world (including me) actually uses jQuery’s Sizzle which gives us some really key additions like :not, :contains, and :first.

So I did a little extension hacking and added Sizzle support to FirePath. You can find the patch for it where I submitted it to the FirePath author at http://code.google.com/p/firepath/issues/detail?id=22.

Update 3/22/2011

I guess I’m not the only one who wanted to use jQuery/Sizzle. The patch was accepted and FirePath with jQuery/Sizzle is now available in Version 0.9.6.1!