I have already posted about the Firefox extensions book project that we are working on, and today I wanted to hear from you your experience with Firefox extensions. We have currently to win 2 (Two) Books of your choice from Apress, and there will be certainly more prices for contributors.

To participate simply send us your favorite extensions in 25 categories listed below (maximum 4 extension in each category) :

Advertising
Blogging
Bookmarks
Chat
Contacts
Dictionaries and translators
Download
Editing and Forms
Entertainment
Email
Exploring the web
Extensions
Games
Greasmonkey
Images
Misceallaneous
News Reading
Privacy
Productivity
Searching
Security
Tabbed browsing
Tuning Firefox
Toolbars
Web Development

Update 1 : Contest will be closed on October 25, 2006. Participations posted after this date won't be considered in this contest, but you can still contribute by posting your favorite firefox extensions.
Update 2 : Contest closed, winners are Anwar Ben Tanfous, and Geoffrey Brown. Email have been send to notify about prizes. Thank you and hope to see more contributions in the future.