Certificate Expired

The server's TLS certificate has passed its validity period. Firefox blocks the connection until the site renews the certificate or the client's clock is corrected.

References

searchfox.org/nss/source/lib/util/secerr.h
support.mozilla.org/en-US/kb/what-do-network-error-messages-mean

In this namespace

← previous NS_ERROR_UNKNOWN_PROXY_HOST Proxy Server Not Found next → SEC_ERROR_UNKNOWN_ISSUER Unknown Certificate Issuer

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