In Feedback Factory you can integrate the Community Builder profile component to extend the user profile.
Download CB extension and install it like a regular Joomla extension. You will see the Community Builder button in the Components menu after installation.
CB comes with some assignable generic fields but you will also need to create your own to assign the Feedback Factory fields to the ones from CB. This can be done by going to Components/Community Builder/Field Management.
Check this page for detailed information about setting up your Community Builder fields for our extensions: Community Builder Fields for thePHPfactory Joomla Extensions
Correct field mapping will be required to display information properly between the questions, profiles and other plugins.
(!) Documentation based on Feedback Factory version 3.0.2