DNS over HTTPS (DoH) in Firefox helps improve privacy by encrypting DNS requests, preventing third parties from intercepting or spying on your browsing activity. For users in regions where DoH is enabled by default, it ensures that DNS queries are routed securely through HTTPS servers, enhancing overall security and privacy. If there’s an issue with connection, it might be related to network configurations or DNS server settings.

Hi A, if you need additional help with the connection error, could you check the page - click the Advanced button if needed - and let us know what error code you see (normally similar to SEC_ERROR_SOMETHING).

Spoiler alert - many are covered by this article: Troubleshoot security error codes on secure websites.