3 ms·

Correct. In order to preserve compatibility, Firefox's implementation has a "fallback" where if it sees that it can't resolve a domain, then it will fail back

• extra88 7y ago
  You can also exclude specific domains but at this point they have to be written in about:config. https://support.mozilla.org/en-US/kb/firefox-dns-over-https#w_excluding-specific-domains https://support.mozilla.org/en-US/kb/firefox-dns-over-https#... It looks like Firefox Policies can be used to enable, disable, or specify the DoH provider but cannot yet specify excluded domains. https://github.com/mozilla/policy-templates https://github.com/mozilla/policy-templates