I'm assuming the app impersonated a real login with Facebook prompt. When I use a real Facebook login in another app, it tells me which permission I want to gra

I'm assuming the app impersonated a real login with Facebook prompt. When I use a real Facebook login in another app, it tells me which permission I want to grant to another site, and lets me edit them. But I wouldn't think twice if I was asked to enter my credentials (which happens if you don't have the Facebook app installed) and didn't receive that permissions prompt.