Something like it is basically a requirement if you want to see digital ads. Advertisers want to know how many people who saw/clicked their ad went on to make a purchase.

Safari and Firefox should isolate the cookie by default.

To make the only consumer revenue that will really ever be available.

Remember they once predicted it would be 50% of their income.

This is the only way they get there.

Attribution is a core part of building an ads system.

Because it's another surveillance adtech company from SillyCon Valley. Duh.