CF 9 developer box with SSL

Hi All,

I was able to setup CF9 with SSL in the pass using this https://forums.adobe.com/thread/1330662

Getting an error using Firefox 53.0.2 when I open my site https://localhost:9100/mySite

localhost:9100 uses an invalid security certificate.

The certificate is not trusted because it is self-signed.

The certificate is not valid for the name localhost.

Error code: SEC_ERROR_UNKNOWN_ISSUER

Adding the exception doesn't fix the issue because I cannot use my site with https.

Any ideas about this issue?

Best

JFB