Open Firefox. Click the 3 lines at the top right of Firefox
Select Options
Select the Privacy and Security tab at the left-hand side of the screen and scroll to the bottom of the page until you see the heading Certificates
Select View Certificates to view the certificate store contents.
Select Import on the Your Certificates tab
The Certificate File To Import dialogue box will appear. Select All in the drop-down box at the bottom right of the dialogue box
Browse to your NASH Certificate and click Open.
Enter the NASH Certificate password and select OK
The NASH Certificate will now be shown within the tab Your Certificates along with the NASH Certificate expiry date confirming the Certificate has been installed successfully
