Depending on the social media platform, you may be able to simply download a CSV of the contacts. Once you do this email it to email@example.com. We will upload it for you.
Unfortunately, Facebook, Twitter and Instagram do not currently have ways to export contacts. As of late 2018, Linked In no longer allows people to export their contacts unless the connection has intentionally opted to share their information.
If you would like information for other social media platforms and whether or not those contacts can be exported, please email 'firstname.lastname@example.org'. We'll be glad to help!
Also, FYI, First does automatically search for and append some social media accounts of your contacts once they are uploaded. See below for where you can find them on the contact card.