Related website setsRelated website sets declares relationships between sites so the browser allows cookie and storage access between them through methods such as document.requestStorageAccessFor().limitedhttps://wicg.github.io/first-party-sets/https://privacycg.github.io/requestStorageAccessFor/https://developer.mozilla.org/docs/Web/API/Document/requestStorageAccessForapi.Document.requestStorageAccessForapi.Permissions.permission_top-level-storage-accesshttps://nowyoucanuse.com/features--related-website-sets.html