Firefox error code: ssl_error_rx_record_too_long
Most likely SSL certificate has been installed improperly on your server. We strongly recommend you to contact your hosting company and ask their technical department to fix the issue. If site that you would like to secure is hosted with Namecheap Hosting please submit a ticket to Hosting -- Technical department to get assistance. In case you are the administrator of your own virtual private server or dedicated server you may try the recommendations below.