Adblock Plus
BBCode xtra
Beef Taco
BetterPrivacy
Dictionary Search
Downloadhelper
Flashblock
Google Translator for Firefox
Image Zoom
NoSquint
Screengrab
Ghostery
All of these help make my visit to the WWW safe and pleasurable. I get fewer advertisments, I get fewer spys upon my viewership, I get to block annoying FR ads on each FReeperthon drive, I get functionality like being able to transcribe foreign languages with just a highlight and click. You can't beat it.
I really like Ghostery!
;-)