When users read web pages in a web browser, they often need to jump between various web pages, including clicking links, go forward, go backward, refresh the current web page, open a new tab, enter search engine, open the setting interface, and other operations. Although Google's Chrome already provides buttons for most of these functions, many users would like to utilize custom mouse gestures to do this more efficiently.

UltraSurf (AKA: 無界瀏覽) is one of the world's most popular free anti-censorship and pro-privacy applications, developed by UltraReach Internet Corporation in 2002. It was originally created to help internet users in Mainland China (where the Internet is heavily censored and Internet users' activities are monitored by the Great Firewall of China) bypass internet censorship and protect their online security & anonymity. After that, it became popular in many countries with Internet blockade due to its good usability, fast running speed and unlimited network traffic.