Comment by JoshTriplett

> Not yet but they can't just turn off third party cookies arbitrarily in their browser without giving time for sites and advertisers to update their systems to account for the removal.

This is a good example of anticompetitive/anti-monopoly regulation not only not protecting consumers, but in fact making things actively worse.

A better regulatory response would have been "having an advertising/analytics product and a browser product in one company is anticompetitive, split one of them into a separate business from the other, and then the browser product must not privilege the advertising/analytics product". Then the browser could, in fact, just disable third-party cookies without giving advertisers and analytics companies another alternative.