docs: protected WebDriver getDefaultDriver(DesiredCapabilities caps) {
  		String hubUrl = getHubUrl();
  		if (hubUrl == null) {
  			return new FirefoxDriver(caps);
  		}
  		try {
  			return new RemoteWebDriver(new URL(hubUrl), caps);
  		} catch (MalformedURLException e) {
  			throw new SebException("Unable to construct remote webdriver.", e);
  		}
  	}