Firefox Extensions - which are the most useful ?

Where did you find torrent wise?

My Current Extensions:
-Greasemonkey
-Stylish
-Download Statusbar
-IE Tab
-Tab Mix Plus
-Fox Lingo
-ChatZilla
-Fasterfox

linkification

adblocks all i have

Tab Mix Plus, Session Manager, IE Tab and Flashgot.

smoothscroll is really nice, once you start smooth scrolling it is hard to go back..lol

I've got these, off and on:

General surfing:
Adblock - for ads, obviously.
CustomizeGoogle - to get rid of some googlecrap adblock didn't catch.
Duplicate tab - to duplicate tabs complete with history.
IE tab - switch to ie-engine in tabs when you need it.
SuperDragAndGo - drag links to open them in new tabs (feature in maxthon I liked).
SwitchProxy Tool - for proxy management (will be looking for something better when I need it tho', it's not that brilliant).
VideoDownloader - for ripping stuff off youtube, google and other stuff.



For when I'm coding:
DOM Inspector
Firebug
HTML Validator
Web Developer
XML Developer Toolbar


But as someone said, don't use more than you need, it'll only slow you down.

Adblock and Greasemonkey.
Not a FF extension, but this is very useful.

Download Statusbar
FF the best browser

Adblock Plus 0.7.2.4
Ads were yesterday!

AI Roboform Toolbar for Firefox 6.8.9
Allows the use of Roboform in Firefox.

Drag de Go 0.2.5
This extention allows you to execute several commands using Drag and Drop Gesture.

Googlebar Lite 4.6
A light-weight Google search toolbar for Firefox.

Hit-a-Hint 0.9.1 - mouseless browsing
Click links by hitting hints!

Image Zoom 0.2.7
Adds zoom functionality for images

ImgLikeOpera 0.6.15
Allows load only the images that you want

NoScript 1.1.4.6.070317
Extra protection for your Firefox: NoScript allows JavaScript, Java (and other plugins) only for trusted domains of your c...

Tab Mix Plus 0.3.5.2
Tab browsing with an added boost.

Torbutton 1.0.4

Mouse gestures is my absolute favorite.

Otherwise, I use Downthemall!, Developers toolbar, Del.icio.us Tagger :D, TabMix Plus, and Google Customize.