Once upon a time, Wolfgang S. Rupprecht wolfgang.rupprecht+gnus200905@gmail.com said:
It is a shame that there isn't a simple documented way to add other CA's to Firefox's approved list or some system global way to add CA's for all programs looking for pki certs.
For Firefox, you just have to publish the cert in DER format (with the MIME type application/x-x509-ca-cert). If you click on such a link, Firefox will ask you if you wish to trust the cert (and what classes of things you trust it for).