TOR - Browser For Linux.
Tor browser for Linux is free software for enabling anonymous communication. It is also the best browser on the market for keeping you secure online.
The name is derived from an acronym for the original software project name "The Onion Router". Tor directs Internet traffic through a free, worldwide, volunteer overlay network consisting of more than seven thousand relays to conceal a user's location and usage from anyone conducting network surveillance or traffic analysis.