The HCP S Series Management Console is accessible on port 8000 with HTTPS. The Management Console communicates with the S Series Node by using the management API, which uses port 9090 with HTTPS.
When accessing the Management Console, you are prompted to accept a security exception. When the security exception is accepted, browsers such as Microsoft Edge or Google Chrome automatically propagate the exception to both required ports (8000 and 9090). After accepting the exception, you can start using the Management Console.
With Mozilla Firefox, the security exception on each port must be explicitly accepted (first on port 9090 and then on port 8000). This is a known limitation with Firefox. As a workaround, to use the Management Console, you first need to make a separate HTTPS call to each of the applicable ports.