This application adds additional gestures that do not interfere with the OS built-in gestures. For web browsers such as Firefox, Safari, you can easily browse through tabs, open links in a new tab, close tab, all using very intuitive gestures such as triple tap or sliding two fingers while another finger stays stationary.
The video in the presentation speak for its self.
Price: 5.49 $
Official site: http://www.jitouch.com/