Error in Firefox: Secure Connection Failed An error occurred during a connection to alfresco:8080. SSL received a record that exceeded the maximum permissible length. (Error code: ssl_error_rx_record_too_long)
For the user that the problem occurs in Firefox, it doesn't in Chrome. Another user has the same problem with Chrome, but it works in Firefox.
Try using firefox dev tools (Tools > Web Developer > Network) to trace the network requests that the browser is requesting. See there if there really is a redirect that that browser is following.