The newest version of Firefox goes a long way to prevent this with Total Cookie Protection[0]. You’re basically left with fingerprinting as all cookies are site specific - even third party cookies. Combine that with with a DNS that does cname uncloaking like NextDNS and noscript and you’re about as good as you can get without extreme measures.

[0]: https://blog.mozilla.org/en/products/firefox/firefox-rolls-o...