But anybody knows (in tech I mean) that a browser client leak a lot of things and sustained tracking is easy even cross-browsers (and cross-devices too with more advanced techniques), including history (easy to know which websites were visited with timing analysis in loops and iteration), it falls on the responsibility of the user to achieve privacy, but it requires heavy sacrifices that frankly most users are not willing to do, fingerprint.com is really basic and doesn't go to a great length at all actually to track users (fortunately).

Reality is that most do not care about privacy (look at the number of Google users, even developers themselves who are completely aware of it and continue to "embrace" the mass tracking). There is also the mass brainwashing which is an issue where people that use VPNs think that they are anonymous and this is terrifying to think (thank you NordVPN non-sense, which also use Google Analytics which then correlate entire traffic later-on, what a joke).