SecFox is collection of addons which is can be used to customize any firefox to a security assessment tool. Check http://a4apphack.com/sf1 for few tips and documentation
You can capture your screen and record your voice to make screencasts (tutorials, e-lessons, etc.).
Displays Server Type, Headers, IP Address, Location Flag, and links to Whois Reports. Shows links to check server status and cache when page fails to load.
PassiveRecon provides information security professionals with the ability to perform "packetless" discovery of target resources utilizing publicly available information.
Displays the current SSL/TLS cipher, protocol and certificate chain in the Add-on bar and Site ID dialog
Cookie Watcher is a tool to watch selected cookie in a statusbar.
Quickly and easily increment and decrement numbers and strings in URLs for navigating through URL sequences.
CryptoFox is an encryption/decryption tool for Mozilla Firefox, with dictionary attack support for cracking MD5 passwords.
Groundspeed is an add-on that allows security testers to manipulate the application user interface to eliminate annoying limitations and client-side controls that interfere with the web application penetration tests.
Certificate viewer enhancements: PEM format view, file export, trust configuration
View Dependencies adds a tab to the Page Info window, in which it lists all the files which were loaded to show the current page.
Cookie Editor that allows you add and edit "session" and saved...
Firefox 3 comptible
69 weekly downloads
Offensive Security Exploit Database search