1. It can only be Tab Mix Plus
. This extension does almost anything… from undoing closed tabs, open all links in new tabs only, multiple row tab-bar, reload every N seconds a tab to session manager. Love it.
. In my good old hattrick-addict days, i couldn’t play hattrick
3. All-in-one Gestures
. Easy navigation using mouse gestures. Like holding down right click and moving the mouse to the left makes a webpage go back, down makes a new tab open, etc etc… simply brilliant!