Installing OpenSC PKCS#11 Module in Firefox, Step by Step

Bob Fontana edited this page Nov 1, 2017 · 7 revisions
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Installing OpenSC PKCS#11 Module in Firefox, Step by Step


1.) Start Mozilla Firefox.


2.) Click the Menu Button and choose Options.


3.) For Firefox Release 55 and below, click Advanced and switch to the Certificates tab. Click Security Devices.

For Firefox Release 56 and up, click Privacy & Security, scroll down and click Security Devices.


4.) Click on Load.


5.) Change the Module Name to OpenSC PKCS#11 Module. Click on Browse….


6.) Select the installation directory.
Windows: C:\Windows\System32
macOS: /Library/OpenSC/lib/
Linux: /usr/lib/

Click on opensc‑pkcs11.dll (Windows) or opensc‑pkcs11.so (Linux, macOS). Click Open.


7.) Verify the new module is loaded. Click OK to close the Device Manager.