No Script/WOT/KeyScrambler/Download Helper/DownloadThemAll/PDF Download/RealPlayer Browser Record Plugin/Tab Scope/Toolbar Buttons
I have added a few, removed a few, hoping for them all to make it to being 3.1 compatible by Firefox beta 3 ...
NoScript (wouldn't leave home without it) + Adblock Plus (multiple subscriptions) + Web of Trust (although I have been guilty of ignoring it )
I think there are 9. AdBlock Plus/Element Hiding Helper with EasyList subscriptions, ColorfulTabs, Download Manager Tweak, DownloadHelper, Memory Fox, SmoothWheel, TV-Fox and WOT.
NONE, never liked add-ons Never and still don't know why people can't get over Chrome lack of "Add-ons"
8: Adblock Plus, BetterPrivacy, KeyScrambler, .NET Framework Assistent(wtf. Well, never mind.), NoScript, OpenBook, QuickJava, Tab Mix Plus.
7 Add-ons. -Paste and Go 3 -WOT -Adblock Plus -Text Link -Web Mail Notifier -GR Spelling Dictionary -Vista-aero Theme
Before learning of bookmarklets, userstyles, and userscripts; above 40. Now it's 28. Still heavily customized though, elsewise I would've moved.