Extension types & examples (more at delicious.com/tag/mimshack )
- Usability (Facebook Invite All, Stay Focused, Lazarus)
- Interface Customization (Minimalist for Everything, Vimium)
- Croudsourced Browsing (AdBlock Plus, BugMeNot, RetailMeNot)
- Privacy (Ghostery, TrackMeNot)
- Security ([LastPass](