Server Not Found

DNS resolution failed for the requested hostname. Shown as "Hmm. We're having trouble finding that site." Usually means the domain doesn't exist, was mistyped, or the DNS resolver is unreachable.

References

searchfox.org/mozilla-central/source/xpcom/base/ErrorList.py
support.mozilla.org/en-US/kb/what-do-network-error-messages-mean

In this namespace

← previous NS_ERROR_REDIRECT_LOOP Redirect Loop Detected next → NS_ERROR_UNKNOWN_PROTOCOL Protocol Not Recognized

NS_ERROR_NET_RESET NS_ERROR_NET_TIMEOUT NS_ERROR_OFFLINE NS_ERROR_PROXY_CONNECTION_REFUSED NS_ERROR_REDIRECT_LOOP NS_ERROR_UNKNOWN_HOST NS_ERROR_UNKNOWN_PROTOCOL NS_ERROR_UNKNOWN_PROXY_HOST SEC_ERROR_EXPIRED_CERTIFICATE SEC_ERROR_UNKNOWN_ISSUER SSL_ERROR_BAD_CERT_DOMAIN