How to fix Firefox Error code: sec_error_expired_certificate (Untrusted Connection)

Описание

When i try loading the site facebook.com from the firefox, i am getting the error 'Untrusted Connection'. This connection is Untrusted.
Technical details: www.facebook.com uses an invalid security certificate.
(Error code: sec_error_expired_certificate)
Solution: How to resolve this error with easy fix - Check your PC's current date and time. If it is set to be wrong or old date and time, then you will get this error. So, ensure you PC has correct current date and time, in order to successfully validate the security certificate.