The “SSL_ERROR_RX_RECOD_TOO_LONG” error is a problem that’s specific to Mozilla Firefox. In other words, you likely won’t come across it when using other browsers, although they may have their own versions of the error.
The particular wording can vary. However, along with “SSL_ERROR_RX_RECORD_TOO_LONG”, you’ll typically see a “Secure Connection Failed” message
This is a relatively common error. Fortunately, that means there are a handful of tried and true methods you can use to resolve it.