Tor browser is made by EFF, and the only reason it doesn't threaten vanilla Firefox's market share is because tor is slow as hell.

If Mozilla made two versions of Firefox that were just as fast as each other but only one of them respected privacy, there would be no reason for anyone to choose the non-privacy-respecting version.

There is a new movement to use Bitcoin nodes to greatly increase the speed of Tor. Its called Toroken. It was just announced this week: http://www.dailydot.com/technology/toroken-tor-bitcoin-anony...