Source Tor Browser Homepage.
Tor Browser 5.5.1 recently released, comes with new supported features and bugfix. Most notably, this release features fixes for regressions caused by our font fingerprinting defense: chinese users should have a functional Tor Browser again and emoji support is restored on OS X and Linux systems (A fix for the Windows platform is currently underway).
Tor Browser Changelog.
In addition to this, an oversight in one of the patches which broke some websites depending heavily on iframes was also fixed.
To install Tor Browser just run the following commands via your systems Terminal.
sudo add-apt-repository ppa:webupd8team/tor-browser
sudo apt-get update
sudo apt-get install tor-browser
That's all enjoy!