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

This is how you enable smart cards in Mozilla Firefox (for the old Mozilla and Thunderbird it is mostly the same):

1.) Start Mozilla or Firefox or Thunderbird.

2.) Select "Tools" on the menu bar, select "Option...".

3.) Select "Advanced" Options. Unfold the "Certificates" section. Click on "Manage Security Devices".

4.) Click on "Load"

5.) Change the name to "OpenSC PKCS#11 Module". Click on "Browse."

6.) Select the installation directory. On windows this is usualy "C:\Program Files\Smart card bundle". On Linux and Mac OS X choose "/usr/lib/". Click on "opensc-pkcs11.dll" (windows) or "opensc-pkcs11.so" (Linux, Mac OS X). Click "Open".

7.) Click "Ok".

8.) Click "Ok".

9.) Click "Ok".

10.) Click "Ok".

11.) Click "Ok".