Yup, we have 2 options. Some people want the account created automatically, others want the user to be able to customize their information. It's your choice what works best for your site.
Should you have any other questions or need any more help, just let us know!
Finally, if you haven't already, please consider leaving a rating and review for JFBConnect, or our support, on the Joomla Extension Directory. It's certainly not required, but very appreciated:
extensions.joomla.org/extensions/social-...ook-integration/7215
Thanks, and good luck,
Alex