iOS: Update of the Facebook SDK v4.31.1 for iOS 11 (#631) (#634)
Android: Add a note in the README and Android Guide about the compatibility with cordova-android >= v7.0.0

Disclaimer

The introduction of the new Facebook SDK for iOS 11 add a new confirm modal to the login flow.

This is the expected design flow defined by Apple which Facebook implemented. The cordova-plugin-facebook4 can't modify this behavior (as far as I know, @peterpeterparker).

iOS 11.3

On iOS 11.3, the user won't have the choice anymore between using the Facebook App or using Email/Phone number for Facebook login process but will go straight to the "Facebook - Accept permissions" screen.

Therefore, with this version, the user will still face only one modal during the login flow.

iOS >= 11 < 11.3

Because of the introduction of the new modal, the user might face two modals during the login flow. One asking him/her if he/she want to open Facebook and one again asking him/her as before if he/she want to open the Facebook App.

About the subject, you could for example have a look to this stackoverflow's post.

This is improved with iOS 11.3.