uBlock Origin (formerly called uBlock, uBO for short) is a plugin/addon/extension for blocking ads on web pages for all popular web browsers, developed by Raymond Hill from Canada in 2014, using JavaScript. It gives users a cleaner and faster web browsing experience, and is much more powerful than Adblock Plus, AdGuard, Ghostery, NoScript, Privacy Badger.

Using proxies to indirectly connect to (from a non-real IP address) Internet used to be primarily used to speed up the web browsing. But now, as bandwidth widens, it is more often used as a means of breaking through Internet blockages and a method of achieving anonymous Internet access (i.e., hiding a user's real IP address and protecting user's online privacy and security).