firefox add-ons

[Ash256]

adblock plus - the best addon you'll ever use

[Hawk]

adblock plus - the best addon you'll ever use

This^^

and:
AutoPager - in forums, news sites, almost anything where you have to click from one page to the next it autoloads the next page inline so you just keep scrolling down. completely awesome except with 50 pages of failblog loaded at once it really takes up lots of memory.

Coral IE Tab - lets you load a page using the IE engine in a single tab, just for those sites that need IE (not many of those left except windows update)

DownloadHelper - download internet videos to your hard drive

GoogleEnhancer - just what it says, adds lots of enhancements that i wish were there already

NoScript - Good for the security concerned, annoying if you aren't. it blocks all scripting from running on any site until you allow it, either permanantly or temporarily. This breaks lots of sites until you do this allow.

SearchPreview - Adds a mini screenshot to the search results on google, yahoo and bing.

Xmarks - synchronize bookmarks between browser on multiple machines. i also like it for the backing up of my bookmarks. i know they have this for firefox and for chrome, not sure for other browsers.

[Penneywize]

I use personas to make my browser look coooooool. All the kids are doing it.