It’s yet another scheme to gather data about Chrome users for the benefit of advertisers. Aside from the fundamental problems with that whole idea which people most often point to, it’s also underhanded in a way that cookies, tracking scripts, and browser fingerprinting aren’t: It’s code that’s built in to the web browser itself which exists for no purpose other than to act directly against the interests of its users. It may be the first time that’s happened in such an obvious and unambiguous way.