Adding exception for specific address using certutil.exe

[Lompocman]

Hello,

Having some difficulties with the firefox certificate store. I have an application that gets installed locally that needs to interact with https requests being made from the browser on the same machine.
The final hurdle has come when trying to install a valid certificate into the firefox store.

Since the application is listening on a port running on localhost I am using a self-signed certificate that I just binded to the port. This works fine for both Chrome and IE since they are using the windows certificate store.
I can add an exception manually in Firefox at which point the certificate is added into the store. I haven’t been able to export the cert from the windows store and then import it to the firefox store as the cert does not seem to indicate it is from the port it was originally binded to anymore.

Is there a way I can add this exception using tools like certutil? I have not found any information on this.