If it is describing a solution that should work then has anyone any ideas why it might not be working for me (I'm trying it with Mozilla 1.7.6 on WinXP Pro) - I've followed the instructions as given but without any success. Note: my XPCOM component is very simple
That page refers to plugins, not XPCOM components... (i.e., dynamic libraries implementing the NPAPI)
(And for those, it does seem to be implemented)
smime.p7s
Description: S/MIME Cryptographic Signature
