Installing Your S/MIME Certificate into Thunderbird
From this point on the instructions will assume that you have applied for, been granted, and have downloaded a certificate file (client-certificate.p12). Be sure to back up the file from Firefox in order to be able to import it into Thunderbird (no. 6 below). In Firefox, under Tools > to Options > Advanced > Encryption tab > View Certificates > Highlight the most recent Trusted Device > Click Backup > Click OK.
- Open Thunderbird
- From within Thunderbird select Options from the Tools menu (or Preferences from the Thunderbird menu if you are using Mac OS X)
NOTE: If you have already configured a master password in Thunderbird, skip to Step 5.
- Click the Privacy tab; click the Passwords sub-tab; click Change Master Passwordbutton
- Enter the password, confirm it, and click the OK button.
NOTE: Use the password quality meter to ensure that this is a good quality.
- Click the Advanced tab; click the Certificates sub-tab; click View Certificatesbutton
- Under the your certificates tab click the Import button
NOTE: If you have certificates that have expired DO NOT delete them. If you do you will not be able to view messages that were encrypted using them.
- Browse and locate the certificate bundle file (.p12 file).
- When prompted, enter your master password and click the OK button
- At the next password prompt, enter the password you chose in step 13 of the request process and click the OK button.
- You will be presented with a notice that your certificate has been successfully restored. Click the OK button to close the window then click the OK buttons on the two remaining windows.
- You should now delete the .p12 file from your computer.