code: func startBrowser(url string) bool {
  	// try to start the browser
  	var args []string
  	switch runtime.GOOS {
  	case "darwin":
  		args = []string{"open"}
  	case "windows":
  		args = []string{"cmd", "/c", "start"}
  	default:
  		args = []string{"xdg-open"}
  	}
  	cmd := exec.Command(args[0], append(args[1:], url)...)
  	return cmd.Start() == nil
  }
docs: // startBrowser tries to open the URL in a browser, and returns
  // whether it succeed.