Possible Man-in-the-Middle Detected

Firefox's certificate verifier detected a pattern characteristic of TLS-intercepting security or antivirus software rather than a malicious attacker, and blocked the connection as a precaution.

References

support.mozilla.org/en-US/kb/troubleshoot-mitm-error

In this namespace

— start of namespace —

next → NS_BINDING_ABORTED Load Aborted

MOZILLA_PKIX_ERROR_MITM_DETECTED NS_BINDING_ABORTED NS_ERROR_CONNECTION_REFUSED NS_ERROR_CORRUPTED_CONTENT NS_ERROR_DOCUMENT_NOT_CACHED NS_ERROR_MALFORMED_URI