Identification by Canvas rendering:

"Rendering of a specific picture with the HTML5 Canvas element following a fixed set of instructions. The picture presents some slight noticeable variations depending on the OS and the browser used." > details > Canvas

Unbelievable. But what can you do?

The more you do not to be tracked.
The better you stand out of the crowd.
The better trackable you are.

Thats kind of paradox. We're all doomed. Tor-Browser is not a viable solution for the general public. (Or for my everyday surfing needs)