[fjarlq]

A decent overview: https://panopticlick.eff.org/about

Test your browser: https://panopticlick.eff.org/

[hellofunk]

That site is interesting, and it shows you that 1 of X browsers resemble a particular fingerprint ingredient.

I found this one rather interesting, it was the most unique of the ones listed:

HTTP_ACCEPT Headers

One in several thousand have the same headers as me. But the headers themselves are quite a small little string, I'm surprised it is that unique.