First-Party Sets is a proposal to allow related domain names owned and operated by the same entity to declare themselves as belonging to the same first party.
First-Party Sets is part of the Privacy Sandbox, a series of proposals to satisfy third-party use cases without third-party cookies or other tracking mechanisms.
Resources:
Proposal overview and timeline → https://goo.gle/3CEBewZ
Proposal technical explainer → https://goo.gle/3CBOjHj
Privacy Sandbox → https://goo.gle/3CGDV0U
Chapters:
0:00 - What are First-Party Sets?
0:27 - Why do we need First-Party Sets?
2:20 - How do First-Party Sets work?
4:14 - First-Party Sets and cookies
5:00 - Find out more about First-Party Sets
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