https://instantlisted.com/privacy

The extension stores your InstantListed session locally in your browser to keep you signed in. It sends your email address and verification code to instantListed's servers (api.instantlisted.com) solely to authenticate you, and fetches the listings you created so it can fill marketplace forms on your device. It does not sell or share your data, does not track your browsing, and only runs on Facebook Marketplace and Gumtree listing pages. Contact:
contact@instantlisted.com.