Canvas fingerprinting is a completely new way of tracking users online for advertising purposes, and reports detailing it claim it’s rather difficult to bypass. Even Adblock Plus users can’t escape canvas fingerprinting, but the company explained on its blog there is a way to deal with it, and with cookies for that matter, using its browser plugin.
Or, alternatively, just don't run the Javascript in the first place.
I meant don't run Javascript by default (NoScript, HTTPStatusboard, any of a number of options for doing this) - AdBlock only blocks based on a blacklist, which makes it useless against a lot of things. It's like purely virus database-based antivirus. It will protect you against old exploits, hopefully, but it won't do anything against a zeroday.