I am using sh404sef component to mask the urls.

We only have one URL, which is for our Login/Register page. You should easily be able to use sh404SEF to change the alias for that URL however you want, but you'd need to contact sh404SEF for the specifics of creating aliases. The specific URL is:
index.php?option=com_jfbconnect&view=loginregister

If you're seeing JFBConnect URLs elsewhere that you'd like to change, just let us know, but in general, what you're looking for is exactly what sh404SEF and other URL managers are for.

Thanks,
Alex

No, we don't. In 3 years, we've never had a request for one. We do work just fine with sh404SEF though.

As I mentioned, we only have 1 URL for our whole component, and that's just used during the registration process. In addition, that registration process is only shown when the User Creation setting is set to "Full Joomla User". Because this URL is not common, and not even shown in all configurations, we haven't devoted any time to making a pretty URL for it. There are simply a lot more important features we have been focused on.

Hope that makes sense. If you're seeing other URLs from JFBConnect that you think should be corrected, let us know, but in general, it just hasn't been an issue.

Alex