Click on 'CONNECT' tab, right click on 'Database' and select 'Create firebird connection'
cm set "demo_cm_firebird" {execute "db.firebird.config.get" "[hostname]" "localhost, 127.0.0.1" "[port]" "3050" "[database]" "test_db" "[user]" "SYSDBA" "[password]" "masterkey" ;};
"1"Click on refrech button: