In my case the single largest contributor to my fingerprint is ... canvas size. I run full screen with a custom Firefox setup that basically makes my canvas size unique :/ The "protection" Firefox uses for this is to always open a new window at a default size, which does nothing in my case since my toolbar config still makes the canvas size unique.

It would be really useful to have something that dithers the reported canvas size by 5 or 10 pixels in different containers to add noise there.