Excellent Rated 5 out of 5 stars

All in all a very full-featured extension. This is an invaluable tool for designing web sites (or just picking apart existing ones). My favorite features are the ability to edit the web site you're viewing & the real-time updates to CSS & layout due to javascript and other dynamic elements. The expanding view in the HTML inspector really puts things in perspective.

This review is for a previous version of the add-on (1.05).