The Tor Project announced the release of an updated versionits beta browser bundle. The Tor Project allows users to surf the Internet anonymous and the new update brings a patch that fixes the loophole security Heartbleed discovered in OpenSSL.
In addition to the OpenSSL fix, Tor Browser Bundle 3.6 Beta 2 updates the transport to the 0.2.12 version and NoScript in 2.6.8.19. It also updates Torbutton in the 1.6.8.1 version, the Tor Launcher in the 0.2.5.3 version and many more.
Read them release notes and changelog.
You can download the new update from official webpage.