Actually, resistFingerprinting + switching to the user-agent string tor uses gets me 99% of the way there. All that’s missing is the weird window size (vertical taskbar), if I could get that to report a default size, I’d actually be better than Tor (they have a bunch of responses slightly more unique than FF with resistFingerprinting).

But it’s academic for me anyway, I have Accept-Language en-US,en;q=0.7,de-DE;q=0.3 which is close enough to unique that nothing else really matters.