QWebEngine cannot show source code for dev-tools while SSL using self-signed cert

1）http server using SSL width a self-signed cert
2）client using QWebEngineView， and could not show souce code in dev-tools window.
3）When add self-signed cert to system trust-ca list，then the source code could be shown.
4）If add self-signed cert to trust list, it does not work.
// Default ssl configuration
QFile server_pem(":/Resources/ca/server.pem");
server_pem.open(QIODevice::ReadOnly);
QByteArray server_pem_data = server_pem.readAll();
server_pem.close();
QSslConfiguration ssl_configuration = QSslConfiguration::defaultConfiguration();
QList<QSslCertificate> ssl_cert_list = ssl_configuration.caCertificates();
ssl_cert_list.append(QSslCertificate(server_pem_data));
//for (int i = 0; i < ssl_cert_list.size(); i++)

{ // qDebug() << "Cert_" << i << ":\t\t" << ssl_cert_list[i].subjectDisplayName(); //}

ssl_configuration.setCaCertificates(ssl_cert_list);
QSslConfiguration::setDefaultConfiguration(ssl_configuration);

Is there any way to add self-signed cert to trust-ca list without insalling CA-cert for trusting to every computer?