Probably not very in mine lol 

 depends on the user. 

 Very accurate  

 amiunique.org/fingerprint 

 Reliable for normies, not that reliable for people using alternative browsers
https://browserleaks.com/canvas 

 another thing: having privacy measures can be detected and the useless data thrown out

even better, you just narrowed the amount of potential users down 

 Yea true, the classic problem of the anonymity set size. The more the merrier, then everyone will look the same 

 My iOS with AdBlock is "ok but has gaps". https://coveryourtracks.eff.org 

 In "Private" mode, "one in 1749.34 browsers have the same fingerprint" as me 

 Best in AI 

 https://www.deviceinfo.me/

Is a great source I think to figure out how weak the browser you are using is. IMO best is to just use uBlock origin in hard mode to block all scripts and then enable always the bare minimum. Since fingerprinting is most accurate with javascript. 

 To clarify: since browsers have decided to become useless and prohibit sharing of user localStorage sessions across websites by disallowing iframe access to localStorage of their own main domain, I was thinking of using browser fingerprinting techniques to do this session sharing, but I guess it would have to be very accurate for it be worth doing.