FireFox 39 Incompatible with all Cisco devices

With the last update access to all devices Cisco via FireFox is no longer supported. Now, I get the following errors:

The secure connection failed
An error occurred during a connection to [IP]. SSL has received a low ephemeral Diffie-Hellman key in the handshake message exchange the server key. (Error code: ssl_error_weak_server_ephemeral_dh_key)
The page you are trying to view cannot be shown because the authenticity of the received data could not be verified.
Contact the Web site owners to inform them of this problem.

Is there a way to roll back the version to avoid this or a permanent fix? FireFox is currently the only browser that works very well with Cisco devices, and now it won't work at all.

What happens if you set these false in two: config:

Security.SSL3.dhe_rsa_aes_128_sha
Security.SSL3.dhe_rsa_aes_256_sha

Are you able to connect with disabled ciphers?

Tags: Firefox

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