| MOZILLA_PKIX_ERROR_MITM_DETECTED | Mozilla Firefox Error Code MOZILLA_PKIX_ERROR_MITM_DETECTED: How to Fix It | critical | Medium |
| PR_CONNECT_RESET_ERROR | Mozilla Firefox Error Code PR_CONNECT_RESET_ERROR: How to Fix It | medium | Easy |
| PR_END_OF_FILE_ERROR | Mozilla Firefox Error Code PR_END_OF_FILE_ERROR: How to Fix It | medium | Easy |
| SEC_ERROR_EXPIRED_CERTIFICATE | Mozilla Firefox Error Code SEC_ERROR_EXPIRED_CERTIFICATE: How to Fix It | high | Easy |
| SEC_ERROR_OCSP_TRY_SERVER_LATER | Mozilla Firefox Error Code SEC_ERROR_OCSP_TRY_SERVER_LATER: How to Fix It | low | Easy |
| SEC_ERROR_REVOKED_CERTIFICATE | Mozilla Firefox Error Code SEC_ERROR_REVOKED_CERTIFICATE: How to Fix It | critical | Easy |
| SEC_ERROR_UNKNOWN_ISSUER | Mozilla Firefox Error Code SEC_ERROR_UNKNOWN_ISSUER: How to Fix It | high | Medium |
| SSL_ERROR_BAD_CERT_DOMAIN | Mozilla Firefox Error Code SSL_ERROR_BAD_CERT_DOMAIN: How to Fix It | high | Easy |
| SSL_ERROR_NO_CYPHER_OVERLAP | Mozilla Firefox Error Code SSL_ERROR_NO_CYPHER_OVERLAP: How to Fix It | high | Medium |