FLoCculated
I haven't seen a message from all browsers besides Chrome that want to integrate Google's cookie “replacement” FLoC to track user behavior. But just to really make sure that your own website does not participate in the whole thing, you should prevent the whole thing with a Permissions Policy. Since there is currently only the OptOut using the HTTP response header, you have to put a stop to the whole thing either directly via the server configuration, the htaccess file or by setting the headers using TypoScript:
config { additionalHeaders { 10.header = Permissions-Policy: interest-cohort=() } }
Of course, please adjust the order in the additionalHeaders array, I'm assuming that there are a few more headers such as content security policy etc.