For Mac Users:

To make sure that your computer can access SSL sites on the internet you will need to install these 2 certificates into your keychain.  You click on each link to download then click or double click to install them.

Here is a video showing you how to install them on Mac computers:

Installing_certificates_OSX

For Windows and Mac users using Firefox browser:

Here is a video showing how to install the CA01-chain on firefox

Adding certificates to Firefox Browser

Here are the certificate files:

1. CA01-chain
2. cert_PA-Sub