"You visited about n sites before coming here" How the hell does that work ?
It tells you if it knows where your cursor is, what pages you've been to, what your computer is, etc.
It was intended to show that you, the user, give out a lot of data without even realizing it.
EDIT: I did a search on reddit and it looks like it actually is https://clickclickclick.click, but because the site hasn't been accessible I can't be sure.
Quite clever.
- it helps with fingerprinting
- there’s no reason to allow it
The logic was that, maybe you were logged to Telcel or to Movistar, or to Liverpool vs Sears (Mexican retailers). That could give us signal on the probability of default
window.history.length
It only counts the previous sites in the current browser tab if I remember correctly.