Share 'What Firefox plugins do geeks use?'

Hey all, well the question is simple. what firefox plugins do you use? The few I use are: Adblock Plus (blocks annoying ads on websites, located on the navigation toolbar) Capture Fox (capture your screen, record your voice, located on the status bar) FoxyTunes (control your media player straight from firefox, located on the status bar) Video DownloadHelper (download videos embeded online, lo...