(Used to be) Extremely useful! Not yet rated
This was a very useful extension until ut started causing severe memory leaks, and crashes. I didn't have any problems with it until recently. Now it is totally conflicting with Firebug and has rendered itself useless. There is no contact link on the developer's site (that I can find), and no system for reporting bugs (again, that I can find). I've been forced to disable it and change what originally was a rave review.This review is for a previous version of the add-on (0.4.2007070801).