March 2010
Extend the Firebug Console with these 15 Extensions - Speckyboy Design Magazine
A great thing about Firebug is it gives you the option to add extra extensions and make it that even more indispensable, you can tailor it and mold it to your needs.
I have listed fifteen of my favorites in this article.
June 2009
Page Speed Home
by 3 others (via)Page Speed is an open-source Firefox/Firebug Add-on. Webmasters and web developers can use Page Speed to evaluate the performance of their web pages and to get suggestions on how to improve them.
May 2009
Mozilla Labs Jetpack | Exploring new ways to extend and personalize the Web
by 3 others (via)Jetpack is an API for allowing you to write Firefox add-ons using the web technologies you already know.
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