This tool is deeply flawed. Fingerprinting protection is sometimes done by binning, which this tool rewards, and is sometimes done by randomizing, which this tool harshly punishes. The net result is it generally guides you away from the strongest protection.

The flip side of this, having the complementary flaw of testing only persistence, not uniqueness, is (warning, real tracking link) fingerprinting.com/demo. You can try resetting your ID and seeing if it changes here. Since tracking requires (a degree of) uniqueness AND (a degree of) persistence, the danger signal is only failing both the EFF test and this test.

Failing both is a requirement to derive meaning, not being lax: measuring only uniqueness would fail a random number generator, and measuring only persistence would fail the number 4.