Canvasblocker: fake Fingerprinting or block doesn't work on these test why?

[skyerjoe]

I found an german Test on an fingerprint which the addon fails by either fake or block fingerprint.

Could someone explain me why ? :
http://www.browsercheck.pcwelt.de/fingerprint

regards skyerjoe

[kkapsner]

This page does not use the canvas fingerprinting technique. Therefore this addon does nothing on this site. It uses the user agent, your screen definition, timezone, some browser capabilities and your plugins