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The Onion Router — better known as Tor is a non-profit organization that develops online privacy tools and constantly researches new solutions for privacy online. Tor browser is a browser that anyone can download for free on Linux, Windows, Mac and mobile devices. When you are using Tor browser all the traffic goes through encryption, which helps you keep your activities private. Tor will encrypt your traffic and change your IP address making you anonymous and private online. Some countries do have restrictions on Tor browser and it is blocked by the authorities.