Listener contributed suggestions:

Please add more if you would like.
Must Have Firefox Extensios Are:

1. Adblock
2. Bookmark Backup 0.3.1 - “completing your XPI’rience”
3. BugOff
4. Bug Me Not - alternate link
5. Tabbrowser Extensions
6. Tab Preferences
7. IEView
8. Paste and Go
9. Tweak Network Settings - turns on/off pipelining
10. ChromeEdit - user profile file editor
11. FlashGot - a must have for me
12. ForecastFox (formerly WeatherFox) - weather forecast
13. Habari Xenu - an RSS/Atom news aggregator
14. All-in-One Gestures Extension - my favourite mouse gestures extension
15. Minimizetotray alows firefox to be minimized to tray which elimantes the time it takes firefox to start becuase it is already in your tray!
16. Spoofstick is a simple browser extension that helps users detect spoofed (fake) websites.
17. Bookmark Synchronizer is a great bookmark backup tool. It will upload to an FTP or WebDAV server you specify everytime your bookmarks are updated. This enables you to get them anywhere.

by RHNet, WinXPNo#1, xtremdav45, Kalic
Updated by Mysid in May 2005, to fix some links which were now broken links.

If you can not find the extension’s above you can find other Firefox extension’s at these website’s below.

Extension Room
Firefox Help: Extensions
Mozilla Update
The Extensions Mirror - “Completing your XPI’rience”

If you want to make your own Firefox extension’s go to these website’s below.

How to write Firefox extensions
How to write Firefox extensions
Arvid’s icons and stuff

By WinXPNo#1 You can add to the above list if you want too.