Tree style tabs.
All-in-one sidebar.
Vimperator.
Ghostery.
Adblock Plus.
Stylish (or Stylebot). I've come to rather love the latter under Chrome, which I've been using increasingly lately.
Readability.
Torbutton.
That's off the top of my head, there's a few others I typically add.
My main problem with FF lately is that with _both_ FF (well, Iceweasel) and Chromium installed, Chrome pigs out all available memory, while Firefox is single-processed. While the _active_ Chrome tab usually frees up fairly quickly if swapped, Firefox can literally take minutes to dig itself out of heavy swap.
That's off the top of my head, there's a few others I typically add.
My main problem with FF lately is that with _both_ FF (well, Iceweasel) and Chromium installed, Chrome pigs out all available memory, while Firefox is single-processed. While the _active_ Chrome tab usually frees up fairly quickly if swapped, Firefox can literally take minutes to dig itself out of heavy swap.
Yeah, I still use spinning rust.