Step 1: Make sure your smart card reader and smart card are inserted.
Step 2: Add the CAC module to Firefox as a security device.
a. From the Firefox taskbar, click the Options icon (“gear” shape).
b. Click the Privacy & Security menu from the left-hand navigation.
c. Scroll down until you see the Certificates heading, and then click Security Devices.
d. At the Device Manager window, click the Load button.
e. Enter the following for the module name: ActivClient PKCS#11 Module.
f. Click the Browse button to select the directory where the ActivClient PKCS #11 driver is located. Note: You must select the driver version based on your Firefox version – 32 bit driver if your Firefox version is 32 bit and 64 bit driver if your Firefox version is 64 bit. Determine your Firefox version by navigating to Menu → Help → About Firefox. i. 32 bit version → C:\Program Files (x86)\HID Global\ActivClient\acpkcs211.dll OR C:\Program Files (x86)\ActivIdentity\ActivClient\acpkcs211.dll ii. 64 bit version→ C:\Program Files\HID Global\ActivClient\acpkcs211.dll OR C:\Program Files\ActivIdentity\ActivClient\acpkcs211.dll
Step 3: In Firefox, test your configuration by navigating to a CAC-enabled website.