I use:
Adblock Plus (Seriously, if you run Firefox without it, you're missing out!)
BBCode - Adds basic BBcode to my right click context menu, it does save me some time with nonstandard tags or forums with no wysiwyg editor
CookieSafe - This keeps the tracking cookies at bay so I don't have to worry about being traced across sites. It also is an awesome cookie manager, I can selectively destroy useless cookies to cover my tracks.
Download Statusbar - This is very useful. It helps me keep tabs on what I'm downloading
Download Helper - A useful tool for extracting flvs from youtube and other live streams
DownThemAll - A mass downloader tool, I havent needed it more than a few times, but it's a nice thing to have around since it can automate file detection. I mainly use this to browse a file archive and download whole sets of files. (usually videos of some sort, and this isnt MU or RS friendly)
Dummy Lipsum - This is good for generating some pure dummy text in any basic text field I can find. I dont use it often.
Duplicate Tab - An extremely useful tab tool which can clone a tab off to a separate window, or even in the same window. I love tabs <3
Next Tab - Allows me to 'Open a link next to the current tab' This is EXTREMELY USEFUL! It saves me a lot of searching for tabs especially if I have a ton open in one window. I dont have to scroll to the end of the tab list to find the new tab.
NoScript - A definite must, it blocks all manner of annoying scripts and such. While it does cripple some pages, I can easily fix that by granting the page permission to run scripts.
PayPal Plugin - This is a godsend, especially if I have to buy something from a dubious seller. The fact that I can generate a secure 'Digital' one time use credit card which goes away after one use is indespensable. And it's a good way to keep tabs on my paypal account. (Not that I shop much, but I'm safe when I do shop)
QuickJava - Gives me two icons on the status bar which allows me to quickly and globally disable Java and Javascript. Definitely useful if I'm browsing a malicious part of the web
Remove It Permanently - This is a nice little tool. I can permanently, (or temporarily) remove elements from a page, so I dont have to see them again. It even allows me to block based upon domain names and such. It's definitely useful for removing extremely irritating page objects like ads which ABP misses and other things I just dont want to see. It doesnt always work cleanly though.
Smart Bookmarks Bar - nifty little addon which compresses my bookmarks bar to icons only, thus allowing me to put more links up there
Tab History - Links opened in a new tab retain the history of the parent tab. I cannot express how useful this is. It's amazing.
Tab to Window - Good for moving a tab to a new window.
Tweak Network - A useful little addon which allows the browser to work a bit faster.
Undo Closed Tabs Button - Man, this thing is soooo useful! fkhewdfvgoehrf I could not live without it!! It's saved me tons of trouble, No more having to dig for the url if I just recently closed the window by accident. :D
![[PokeCommunity.com] Firefox Add-ons](https://i34.photobucket.com/albums/d106/la2yk1d/Add-ons.png "[PokeCommunity.com] Firefox Add-ons")
![[PokeCommunity.com] Firefox Add-ons](https://i37.tinypic.com/11hwhe9.jpg "[PokeCommunity.com] Firefox Add-ons")
