Follow these steps to install and enable the CAC driver for use in Firefox: To enable Firefox to trust your macOS trusted certificates, follow these steps: Beginning with version 60, Mozilla makes available an advanced setting to force Firefox to use the systems trusted root store, and by extension the DoD root certificates that were installed via configuration profile. Instead Firefox maintains it's own trusted root store. Unlike other browsers, Firefox by default does not use macOS builtin system trusted certificates.
Completion of Enabling CAC Support for macOS.Firefox 60 or greater, or Firefox Extended Support Release 60.Additional configuration steps are needed to enable CAC support. Unlike other third party applications, Firefox on macOS does not natively support the use of CAC. This article will detail how to enable CAC support in Firefox for macOS.