Interesting. I use Firefox v54 as my default and had no problem. But when I used the current version, I got:

An error occurred during a connection to www.hamdata.com. Peer using unsupported version of security protocol.

Error code: SSL_ERROR_UNSUPPORTED_VERSION

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https://www.ssllabs.com/ssltest/analyze.html?d=www.hamdata.com

Overall Rating : F

This server supports SSL 2, which is obsolete and insecure, and can be used against TLS (DROWN attack). Grade set to F. MORE INFO »

This server supports insecure cipher suites (see below for details). Grade set to F.

This server supports insecure Diffie-Hellman (DH) key exchange parameters (Logjam). Grade set to F. MORE INFO »

This server supports 512-bit export suites and might be vulnerable to the FREAK attack. Grade set to F. MORE INFO »

This server is vulnerable to the POODLE attack. If possible, disable SSL 3 to mitigate. Grade capped to C. MORE INFO »

This server is vulnerable to MITM attacks because it supports insecure renegotiation. Grade set to F.