1668187 - "add security exception" does not "Get Certificate"

Status: RESOLVED DUPLICATE of bug 1665577

(Thunderbird :: Untriaged, defect)

Description

[andrew]

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/85.0.4183.121 Safari/537.36

Steps to reproduce:

I'm trying to add a security exception for my self-signed cert. You can see my cert here:

$ openssl s_client -connect 23.23.15.17:993

In thunderbird go to Certificate Manager.
I choose "Add Security Exception"
I put in Location: 23.23.15.17:993
click "Get Certificate"

Actual results:

Nothing.

Oddly, when I use port 993 I see no traffic with wireshark, like the connection is not attempted. If I use another port, I see the outgoing connection attempt. Does thunderbird treat 993 specially?

Expected results:

I would expect to get the cert and accept it.

Comment 1

[andrew]

I think this is the problem:
https://stackoverflow.com/questions/61077885/add-thunderbird-security-exception-for-self-signed-ssl-certificate