Many peoples want to do more with their Firefox. Thats why Firefox extensions exist. But how do you know which extensions that can fullfill your needs?
Thanks to eConsultant for their hard work listing all solutions for common problems.
200+ extremely useful firefox extensions that save time and effort
Currently I using six extensions for my Firefox.
So what Firefox extensions do you use? 
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Hey, just found this entry after a search: Go Me!
Well, I use more then 6, a lot more:
Flashgot
Scrapbook
Forecast Fox
Adblock Plus + dutchblock
BrowseAtWork
VideoDownloader
QuickNote
FireFTP
ColorfulTabs
SessionSaver
DownloadStatusBar
UpdateNotifier
Some of them I could work fine without, but they all are useful in various ways
~DarkNation
I use the SVGswitcher extension
http://rr.latenightpc.com/wp/a.....x-15-beta/
It lets me change the SVG rendering from browser native to Adobe Plug-In
I’m using it less over time because of improving browser native SVG support
see loads more on SVG on http://svg.startpagina.nl
What is SVG actually? :-\