Guide: How to Turn Firefox to an Ethical Hacking Platform Using FireCAT
FireCAT (Firefox Catalog of Auditing exTension) is a mindmap collection of the most efficient and useful firefox extensions oriented application security auditing and assessment. FireCAT is not a remplacement of other security utilities and softwares as well as fuzzers, proxies and application vulnerabilities scanners.
The current release is 1.4 ( 12 May 2008 )
Download Source Here
Dedicated Host for Firefox FireCAT: http://www.firecat.fr/
Note: you need to install Freemind for this tool