https://groups.google.com/a/chromium.org/g/blink-dev/c/-unZxHbw8Pc/m/_23CsOkHAQAJ
Intent to Prototype: SameParty cookie attribute
intentprototypecookieattribute
https://privacysandbox.google.com/blog/first-party-sets-sameparty
[OUTDATED] First-Party Sets and the SameParty attribute | Privacy Sandbox
First-Party Sets can allow related domain names that are owned and operated by the same entity to be treated as first-party in situations where first party and...
first partyand theoutdatedsetsattribute