[ohso4]

if there's 0.00% similarity for canvas, then I think there would be some issue with the letterboxing. You shouldn't resize your tor window from 1400x900. Tor pretends it's windows, so I don't know why it would do that for the useragent.

I've always used it inside of whonix, and when I tested it, it seemed like everything was fine.

When you disable js you need to do so by setting tor to Safest.

The font list should be spoofed by tor?

Anyway, you can fix all of that just by using whonix and setting tor to safest.