Facebook Alert "Too Many Login Dialog Permissions"

[smimosmile]

I have Facebook integrated into xf via fb app. I have received today this alert:

Too Many Login Dialog Permissions
Your app asks for 4+ read permissions along with public profile and friend list. Asking for too many permissions can lower conversion by as much as 40%. To improve your conversion rate and give people a great app experience per our Platform Policies, please ask for fewer permissions. Read our règles élémentaires for more details.

I am not a developer and I don't use Facebook, please advice.

How to ask for fewer permissions ?

I don't know if it is xf related problem or fb app related one.