What FireFox adons do you use

im just currious for the people who use firefox what addonds if you use any, do you use at the moment? Currently I use Last pass Foxmark and Videodownload helper "great for geting youtube or any flash Videos on to your computer."

I use Flashblock, QuickJava, and Torbutton. Flashblock turns off flash objects unless you want to display them. QuickJava adds a couple buttons to turn Java and Javascript on and off. Torbutton turns Tor on and off.

Fast Dial, Sidebar and Mouse Gestures. In other words, everything so that Firefox becomes similar to my Opera.