Browsers leak all kinds of information that can identify you via browser finger printing (which is already widely used): https://en.wikipedia.org/wiki/Device_fi

Browsers leak all kinds of information that can identify you via browser finger printing (which is already widely used): https://en.wikipedia.org/wiki/Device_fingerprint https://en.wikipedia.org/wiki/Device_fingerprint You can check out how unique you are here: https://panopticlick.eff.org/ https://panopticlick.eff.org/