I’d like to see better fingerprinting tests than coveryourtracks.eff.org and amiunique.org. Both have the flaw that they test only uniqueness, not persistence, with the result that they’d flag a random number generator as a fingerprint, too. Real fingerprinting protection does often involve random, not binned, results, and this results in both websites flunking even the browsers that do pass their tests, like Tor, Safari, and LibreWolf.
CreepJS[0] allows you to "add a signature" (basically give your fingerprint a name). If you re-open the page, and it can correlate your fingerprint, it will show you your signature.