On Librewolf i got 16.48 bits of information, on TOR browser 10.32 bits, but on Tails I managed to get only 9.3 bits.
…as long as you are blocking tracking cookies, and aren’t on a session with a website that’s tracking you.
Otherwise, you just have a nice unique hash in your cookies. A password manager could help here.
Cookies and other ways of keeping a session upright are kept by the browser. So unless you’re mad enough to copy cookies between devices, they prove you’re on the same device.
Using a password every time you log in, and letting your browser wipe everything on shutdown does not show websites wether you’re on yhe same or another device.