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It is annoying, but Firefox asks if you want to allow to use the 3rd party cookies for specific domain. Example of how it looks: https://hacks.mozilla.org/fil

• everybodyknows 2y ago
  In the example, the 3rd party is a sub-domain name. Are sub-domains treated the same as unqualified, "second level" domain names? https://en.m.wikipedia.org/wiki/Domain_name https://en.m.wikipedia.org/wiki/Domain_name
  • DanielHB 2y ago
    when you set a cookie, by default it sets it at the sub-domain level. You can opt-into setting it at a parent sub-domain (or the root-domain) level if you want. So for example: a.foo.com sets cookie X (Set-Cookie: X=value;) a.foo.com sets a cookie Y on foo.com (Set-Cookie: Y=value; domain=foo.com) b.foo.com can read Y, but can not read X