To add the certificate to Firefox, start by opening Firefox
Click on the top right menu bar (looks like 3 horizontal lines)
Click on Options
Step 1: Click on Advance in the left menu bar
Step 2: Select the Certificates tab in the top menu bar
Step 3: Click on View Certificates
Click the Authorities section tab
Click the Import button
Navigate to the Desktop and select the file named Computerisms.Root.Certificate.pem
Click on open
Check all the options and click on OK
Note that the last option, "Trust this certificate for identifying software makers", is not required. You may leave this unchecked, but the other 2 options are required.
How to install Computerisms Certificate Authority into your Thunderbird mail client
To add the certificate to Firefox, start by opening Firefox
Click on the top right menu bar (looks like 3 horizontal lines)
Click on Options
Step 1: Click on Advance in the left menu bar
Step 2: Select the Certificates tab in the top menu bar
Step 3: Click on View Certificates
Click the Authorities section tab
Click the Import button
Navigate to the Desktop and select the file named Computerisms.Root.Certificate.pem
Click on open
Check all the options and click on OK
Note that the last option, "Trust this certificate for identifying software makers", is not required. You may leave this unchecked, but the other 2 options are required.