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A major problem with blocking third party cookies is that it kills any embeddable logged in experience. Think payment gateway widgets that would now require you

A major problem with blocking third party cookies is that it kills any embeddable logged in experience. Think payment gateway widgets that would now require you to login every time you want to make a purchase, or youtube embeds that would no longer recognize your premium subscription and roll ads across the web if if you pay for none, etc.

Vinnl 2y ago
That's what browsers are working on Federated Credential Management APIs for: https://developer.mozilla.org/docs/Web/API/FedCM_API https://developer.mozilla.org/docs/Web/API/FedCM_API
- charrondev 2y ago
  It would have been nice to have a replacement for it ready and shipped before they started getting removed.
  - Vinnl 2y ago
    They haven't gotten removed yet, just compartmentalised and some important existing ones grandfathered in, I believe. And none of that has happened in Chrome, as far as I know.
grishka 2y ago
And that's the only good use case for third-party cookies. I'm willing to sacrifice that if it would mean that reliable cross-site tracking is made impossible.