Installing an SMIME certificate
From MozillaZine Knowledge Base
You can import/install your personal certificate by doing the following:
Note: You must set a master password first. The master password is needed so that imported certificates are stored securely. If you need instructions for setting a master password, look here.
- Go to "Tools -> Options -> Advanced -> Manage Certificates"
- Make sure that you are on the "Your Certificates" tab.
- Click on "Import".
- Select the PCKS12 cert.
- It will ask you for the master password for the software security device. Enter your master password and click OK.
- Next, it will ask you for the password protecting your personal certificate. Enter this password and click OK.
You should have now imported your S/MIME certificate.
If your certificate was not trusted, look here.