http://www.cooliris.com/ really neat google image / flickr / etc image browser, great for screening huge numbers of images quickly to find exactly what you need
Quite a lot eh? Ho ho ho. Abduction! Adblock Plus Better Gmail 2 BugMeNot ChatZilla ColorfulTabs Cooliris CustomizeGoogle Download Statusbar DownloadHelper Easy DragToGo Fast Dial FireFTP Fission GDE IE View Image Zoom Link Alert Linkification Remove It Permanently StumbleUpon TwitterFox Those are the ones I actually use…
foxmarks - keeps your bookmarks the same between different locations, and you can access them online. Works great for me since I use 2 different computers at home, and one at work. User Agent switcher - Good for identifying yourself as IE or Windows (I use Ubuntu). Some sites don't let you in unless you have Internet…