Review for Console² by Realraven (Axel Grude)
Rated 5 out of 5 stars
Using this for years now, it is indispensable for both Extension Development and Web site development. If I had to chose one extension for development that I couldn't live without, it would be this one.
This review is for a previous version of the add-on (0.5).To create your own collections, you must have a Mozilla Add-ons account.