Best Extension Ever Rated 5 out of 5 stars

For web developers, Firebug is quite literally the best Firefox extension ever created. The built-in CSS debugging, live HTML editing, and JavaScript debugging and profiling save me countless hours of frustration every week. I can't imagine developing without it! It's easily a must-have for web development beginners and pros.

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