These are my Favourite Firefox Extensions:
- Adblock Plus
- CoLT for copy of Links
- Copy Plain Text
- ScrapBook for grabbing of websites
- Tab Control
- TableTools
- WebDevelopers
- SQLite Manager
- Voyage
- Screengrab
- Delicious
You can access them as a Collection
In addition I have played with Firefox creating the following extensions:
- DragDropUpload for dropping file into upload fileds (UPDATED for FF 3.5)
- FoxDoc for making zip file accessible from firefox without unzipiing