FireFox / Chrome Error: An error occurred during a connection to X.X.X.X SSL received a weak ephemeral Diffie-Hellman key in Server Key Exchange handshake message. (Error code: ssl_error_weak_server_ephemeral_dh_key)

Type the URL given below in your browser's address bar,

about:config

Here in this config page, you will find a list of boolean entries. Search for below two entries,

security.ssl3.dhe_rsa_aes_128_sha

security.ssl3.dhe_rsa_aes_256_sha 

By default, these are set to TRUE. But you have to set them to FALSE in order to allow the less secured pages.

For Chrome and Opera users, instead of using HTTPS try using HTTP.