Yes, is it now?

    https://fingerprint.com/
    https://coveryourtracks.eff.org/
    https://abrahamjuliot.github.io/creepjs/

I don't have Firefox or another browser installed right now, but the last time I checked, every browser was detected, especially on the first link.

Further, When I used Tor, a few sites, like Google, showed me Captchas for a while afterward, when using my _normal_ browser.

Further I heard that sites like PayPal are giving me black karma when I try to avoid Fingerprinting by using e.g. Tor.