Steam question


When I launched FiveReborn I noticed it had my Steam profile name and thumbnail. It was also open in a shortcut through Steam (meaning it said I was in-game in my friendslist) even though I didn’t place it in or run it through my library. Did the program get this from my open Steam program or from somewhere else? I don’t have GTA V on Steam so I don’t know how it got it or how to stop it from doing so. Anyway to stop this?