FireFox Extensions

I switched to FireFox a couple of months ago, but never looked too closely at extensions until now. After trawling through them this week, I say hooray for:

Sage, an RSS/Atom aggregator.
GoogleBar, of course.
Web Developer Toolbar.
Image Zoom.
AdBlock (get your filters here, and the web will seem a whole lot less shouty).
FlashBlock, which replaces all Flash with a "play" button, and instantly stifles all annoying Flash popups.
IEView, for when you find sites that insist on Internet Explorer.
BugMeNot, for sites that insist on registration

Now on to themes and search plugins...