Please see screenshot attach of the newest Firefox update.
Your connection is not secure
The owner of percussion.com has configured their website improperly. To protect your information from being stolen, Firefox has not connected to this website.
Here’s the error message:
www.percussion.com uses an invalid security certificate. The certificate is not trusted because the issuer certificate is unknown. The server might not be sending the appropriate intermediate certificates. An additional root certificate may need to be imported. Error code: SEC_ERROR_UNKNOWN_ISSUER
