Did you know your favorite website can detect when you’re browsing it in public transport and when you scroll it laying in your bed? Today we’ll learn how they can do it and how this info is used to fight bots. I gave this talk at Google Developer Student Club Žilina, and CodeBeer in Bratislava last year. To be honest, I had already forgotten about it, but recently I found it in my notes, and damn, this stuff is interesting! So after a bit of editing and updates, here it is as an article. A smal...