Comment 21 for bug 1771880

> Seahorse does not support .p12 certificates. It supports GPG and SSH certificates.
I believe this statement and the categorization of the issue as "wishlist" to be incorrect.

On a Debian stretch system with seahorse 3.20.0 this issue does not exist.
I can import *.p12 certificates. There, seahorse has the following categories:
Passwords
Certificates
PGP keys
Secure Shell

In "Certificates" there is "Gnome2 Key Storage". This is where the *.p12 certs go on stretch.
On my Ubuntu box this category does not exist.
So I guess it is an issue of missing packages or misconfiguration rather than an upstream bug.