How to enable Cardinal Key for macOS on Firefox Version 75+
Follow these steps to use Cardinal Key on Firefox Version 75+ with a macOS machine:
Open Firefox and type "about:config" into the Search bar.
A Proceed with Caution screen appears. Select the Accept the Risk and Continue button
On the next screen, search for "security.osclientcerts.autoload" in the Search Preference Name box.
Click the toggle button to set the value to "true."
Restart Firefox.
Try to log in again. If you are still unable to log in, please submit a help request below.