My parent claimed this was possible to do with link decoration and first party cookie matching, and I'm saying it isn't. I do agree this is possible to do with

My parent claimed this was possible to do with link decoration and first party cookie matching, and I'm saying it isn't. I do agree this is possible to do with fingerprints, though (a) all the browsers are trying to prevent fingerprinting and (b) a reputable ad company would not use fingerprints for targeting. This is my understanding of why Google is putting so much effort into https://github.com/WICG/turtledove https://github.com/WICG/turtledove (Still speaking only for myself)