Don't container tabs and FPI offer superior cookie tracking resistance?
With fingerprinting they developed new ways to find unique browsers by detecting how you render specific canvas elements and being able to unique identify you based on that since it's dependent on hardware, browser, OS etc... You can't really do anything about that. From what I've seen. That with other techniques gives a unique fingerpint for you even with Tor which standardizes as much information about you as possible to keep you in that large group of users so you are harder to identify.
Maybe Librewolf does a better job? Brave in my experience also didn't do any better than tor.