I have no shame... and must tell that a first step in realizing the openinfocard selector as a Firefox plugin instead of an extension was achieved today. A Firefox plugin is probably the correct way to handle HTML <object type="application/x-informationcard" >...</object> inside Firefox. When I implemented the certificate chain validation I had to build my own Firefox browser from sources because I needed an API that is not in the Gecko SDK but in the Firefox source code. Now I had everything