Would this bypass most Google Font tracking? An extension that makes Google Font requests on behalf of the requesting site and caches the response indefinitely and for all sites, somewhat like LocalCDN/Decentraleyes, but on demand.
That would prevent Google from getting every request.
FWIW, I'm not sure how much of an issue this even is. My comment was a hypothetical. Sadly the way Google/ Facebook/ etc operate, I just assume that whatever I think of, they've already done it plus 1000s of other things which would never occur to me.