Firefox CUCM SSL Handshake Error

Firefox Error:

Secure Connection Failed

An error occurred during a connection to <IP ADDRESS of CUCM>. SSL peer rejected a handshake message for unacceptable content. (Error code: ssl_error_illegal_parameter_alert)

In Firefox:

Open About:Config

Search for “security.tls”

Edit security.tls.insecure_fallback_hosts and add the <IP ADDRESS of CUCM>

Edit security.tls.version.fallback-limit and set to 0

Edit security.tls.version.min and set to 0