Forefront uses an older method to display a social menu at the bottom right, as follows:
If you connect your site to popular social networking sites such as Facebook, Twitter, LinkedIn or Tumblr with Publicize in Setting → Sharing, you can display links to your profiles on those sites from the Connect in the Customizer.
If you prefer not to set that up, you could instead add a Social Icon widget to one of the widget areas instead:
https://en.support.wordpress.com/widgets/social-media-icons-widget/
Let me know how it goes.