How to Check on Mozilla Firefox Whether the SSL/TLS Certificate is Expired?
If you still face the Firefox error message SEC_ERROR_EXPIRED_CERTIFICATE after completing the above steps, go through the steps below and check whether the website you’re visiting has an expired SSL/TLS Certificate. In the address bar, click on the padlock. If the SS/TLS Certificate is expired, you’ll get a ‘Connection not secure’ message. Fix Firefox Error Click on the Connection not secure option and click on ‘ More Information .’ Once the Page info pop up opens, check for the expiry date. If the certificate is expired, as a website visitor, you will not be able to do anything unless the website owner renews it. If you’re the owner of the website, then it’s recommended to renew the SSL/TLS Certificate from a trusted Certificate Authority without delaying it further. Call 1-856-514-8666 for help and support of Fix Firefox Error.