This solution covers any incident where you encounter a web security certificate error message when viewing Sphere websites using Firefox or Safari. The message says 'This Connection is Untrusted'.
The message will make it look like that the security certificate is expired, but this is not the case. If you launch the same website using Internet Explorer, Google Chrome, and other browsers you will see that the certificate is not expired.
You will need to contact Firefox or Safari Support to further assist you on this issue.