Mozilla has a special agreement with Cloudflare to resolve DNS queries without logging anything, so that's not an argument against Firefox
> Anyone who has worked with DNS servers knows what goes into such logs and in order for Cloudflare to keep their promise they need to: Delete the DNS requests information, but at the same time somehow still keep "anonymized" logs of the total number of requests, a list of all domain names requested, a so-called "sample" of complete DNS queries along with date and time.