Firefox ESR17.0.x does not support TLS 1.1 & TLS 1.2
ESR17.0.x does not support TLS 1.1 nor TLS 1.2 . FF25.x supports both by setting "security.tls.version.max" to 3
ESR17.0.x does not support TLS 1.1 nor TLS 1.2 . FF25.x supports both by setting "security.tls.version.max" to 3