It's quite normal for Firefox to be sucking up over 200MB of memory right off the bat. Firemin can decrease Firefox's memory usage to as low as 10MB and stop your computer from running out of memory.
Firefox Password by Thegrideon Software is advanced password recovery and decryption tool for Mozilla Firefox. Firefox Password allows you to recover Master Password and logins and passwords saved in Firefox cache (signons.sqlite database).
WinMend History Cleaner is a utility that can comprehensively clean histories produced by various programs in the system. It can effectively scan and clean histories generated by more than 100 programs.
Winclear
* Easy to use: Just press the shortcut keys to do the cleaning in the background.
* Browser Compatibility: Supports all popular web browsers such as Internet Explorer, Mozilla, Firefox, AOL, Netscape, Opera, and MSN Explorer.
HTTP(s) Protocol Analyzer,integrates into the lower part of your IE and Firefox browser. It allows you to capture HTTP/HTTPS traffic in real-time. It doesn't change your Windows system files and no device drivers or proxies have to be installed.
HTTP Analyzer is an utility that allows you to capture HTTP/HTTPS traffic in real-time. It displays a wide range of information, including Header,Timing, Content, Cookies, Query Strings, Post data, Request and Response Stream,redirection URLs and more