CookieSwap is an extension that enables you to maintain numerous sets or profiles of cookies that you can quickly swap between while browsing.
Protects you against tracking through "free", centralized, content delivery. It prevents a lot of requests from reaching networks like Google Hosted Libraries, and serves local files to keep sites from breaking. Complements regular content blockers.
Manage your tabs in sandboxes increasing your privacy!
Torbutton provides a button to easily enable or disable the browser's use of Tor.