According to lcamtuf[1] how people move mouse and use keyboard are unique per person, it's your personal digital-fingerprint that can be transferred to track you elsewhere.
[1] From Book "Silence on the Wire"
[1] From Book "Silence on the Wire"
However, most biometrics aren't the best single line of verification. You still have to add a backup verification of some kind.
Examples, I was working on my car all weekend and my hands have new calluses on them and my finger print is off. I got a new keyboard and my typing pattern is different, etc.
I agree that this is something people should be more aware of and school is a good place to start. However it is up to browser manufacturers to fix this, not users.
Proof: https://panopticlick.eff.org