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Install a client certificate for Firefox

After having requested a user certificate, you'll receive a delivery email. Download your certificate from its status page (to do so, click on the link provided in the delivery mail). NOTICE: you have to use the same machine, same user, same browser and same session you did to request your certificate. You'll see a button: "Download the certificate".

Click on it to launch the importation of your certificate in your browser. You won't see anything, if the operation is a success your browser won't display any message.

You can check its presence in: Menu icon or "Edit" menu / "Preferences" or "Options" / Privacy and Security / Display certificates.

You should see your certificate in the Your certificates. If you select this certificate and click on the button View, you'll see your certificate's details.

You can now use this certificate:

  • with Firefox (authentication on websites)

or export it in PKCS 12 format to an other software (See Signature / Email cypherment) or just keep a backup copy.

To use this certificate in Thunderbird, you must use a browser (as you just did!) then export it (Export a user certificate from Firefox), and then re-import it in Thunderbird (Import a PKCS 12 file for Thunderbird).

Possible errors

You might see this error:

"This certificate can't be verified and will not be imported. The certificate issuer might be unknown or untrusted, the certificate might have expired or been revoked, or the certificate might not have been approved."

If so, make sure the chain has been correctly installed. If not you'll have to import the certification chain manually.

Useful links