I wrote a
symfony plugin to enable the Firebug Lite javascript
in your symfony app (in much the same way that web_debug works).
Firebug, Gmail Manager and Adblock are all plugins I use regularly in Firefox. However, I’ve been getting tired of Firefox’s hunger for my resources, so I want to be as browser independent as possible. So this plugin allows me (and you) to embed some of the debugging functionality of Firebug in other browsers.