FireGestures - gestures extension - execute commands and user scripts - Firefox - Mac Os X
You can execute various commands and user scripts with six types of mouse gestures:
Mouse Gestures (Move mouse with holding right-click)
Wheel Gestures (Scroll wheel with holding right-click)
Rocker Gestures (Left-click with holding right-click and vice versa)
Keypress Gestures (Mouse gesture with holding Ctrl / Shift key)
Tab Wheel Gestures (Scrolling wheel on the tab bar)
Swipe Gestures (3 or 4 fingers multi-touch on Mac's trackpad)