Some websites don’t offer a download at all. Instead, they display a fake interface asking you to enter your Facebook username and password to "verify" your identity before the mapping process begins. If you enter your details, you are handing your account directly to hackers.
Facebook Friends Mapper Extension Download For Android: How It Works Facebook Friends Mapper Extension Download For Android
This is the closest you can get to an "extension for Android." Some websites don’t offer a download at all
Using such tools violates Facebook's Terms of Service and can lead to your account being restricted or banned. Legitimate Alternatives Facebook Friends Mapper Extension Download For Android