Selenium WebDriver node config

config.json

{
"capabilities":
        [
                {
                        "browserName": "firefox",
                        "version": "6.0.2",
                         "maxInstances":5
                }
        ],
"configuration":
        {
                "cleanUpCycle":2000,
                "timeout":30000,
                "proxy":"org.openqa.grid.selenium.proxy.WebDriverRemoteProxy",
                "maxSession":5
        }
}