Mozilla has signed a contract with the devil, this is their problem. Although Mozilla is very privacy focused, its movement is limited to what Google allows. It is always a problem when a company depends on external investors, since they have a say in the decisions it may have. They may object to accepting FloC or other Google mechanisms, because Google does not require them to do so, because it already has its googleanalytics and googletagmanager built into Mozilla with which they obtain their data. I only hope that Mozilla manages to free itself from this contract this year, as it has announced, because only then will it have a free hand to be truly private.