Secure Connection Failed
The connection to www.orangecountyscu.org was interrupted while the page was loading.
• The page you are trying to view cannot be shown because the authenticity of the received data could not be verified.
• Please contact the website owners to inform them of this problem.
There is no "I Understand the Risks": "Add Exception" button, just a useless "Try Again" button. After reading the ssl error & TLS 1.2 thread and https://bugzilla.mozilla.org/show_bug.cgi?id=937555, I was able to get Pale Moon to connect to the site by setting security.tls.unrestricted_rc4_fallback and security.ssl3.rsa_rc4_128_sha to true. (No other workarounds worked.) These options no longer exist on Firefox 53.0.2, yet it successfully connects to the site without making any special settings, using "TLS_RSA_WITH_3DES_EDE_CBC_SHA, 112 bit keys, TLS 1.0".
Bug 937555 was fixed by changing server settings on addons.mozilla.org, but obviously I can't get this bank and other sites to reconfigure their servers to allow Pale Moon to successfully connect with secure TLS algorithms. Is there a timeline to merge in whatever Firefox code fixed TLS errors like this one?