Re: Workstation, Server, and Router Options
"Firefox has decided to use Cloudflare by default, you can change it but then you'll have to start managing browser configs. "
Not true, Firefox uses your system DNS, there is currently an opt in experiment to test Firefox's DNS over TLS (DoT) support that uses Cloudflare as the test DNS server but that is only a test.
Since Firefox uses it's own crypto library and not your systems one it has to have it's own DoT support, most applications will not need to have their own support and can just pass the request to the OS. Once the test is over and DoT support is enabled in Firefox by default it will use your systems DNS provider (but send the request itself).
Everyone is dropping DoH support and switching to DoT, DoH was merely a stopgap.