Problems with WSS and the latest browser updates

[catrielr]

There are problems with the latest browser updates and with the use of self-signed certificates.

config.json:
  "server" : {
    "address" : "counter",
    "bind" : "0.0.0.0",
    "port" : 12212,
    "authentication" : {
      "enabled" : false,
      "token" : "1234567890"
    },
    "tls" : {
      "enabled" : true,
      "selfSigned" : true,
      "cert" : "tls/default-cert.pem",
      "key" : "tls/default-key.pem",
      "caBundle" : null
    }
  },

GET
wss://counter:12212/printer
NS_ERROR_CONNECTION_REFUSED

Firefox cannot establish a connection to the server on wss://mostrador:12212/printer.index.php:1444:26
Disconnected

When I configure everything to default and without using TLS, it works perfectly.