It was my favorite... may be replaced by Firefox DevTools in the future though. Rated 3 out of 5 stars
For years this was one of my favorites. Unfortunately recently, especially in the Firefox 21 beta, it often makes the browser extremely slow. With the recent improvements to the built-in Firefox inspector and debugger, it seems this could become obsolete in the near future. That would be sad, since it was a great addon for so long, and has many great plugins that can work within it.This review is for a previous version of the add-on (184.108.40.206-signed).