[JimDabell]

> You cannot block this or opt out because it's server-side.

Facebook’s latest approach is to give people instructions on setting up a relay server in their own infrastructure so that privacy software that blocks third-party tracking still works, even when it looks at IP addresses to detect things like CNAME cloaking.

https://developers.facebook.com/docs/marketing-api/conversio...

[Walf]

The positive of that approach (for users) is that it relies on client-side scripts, so it's possible for privacy tools to target those.