Facebook will be disabling messaging using its web app very soon which means all users will need to install Facebook Messenger to view and send messages. This will be effecting both iOS and Android mobile devices.
This seems like a drastic move from Facebook, as it will be limiting the choices users have when it comes to communicating.
Though Facebook Messenger looks good and functions well, users will have good reasons for not using Facebook Messenger. On top of having the Facebook app, you also need Facebook Messenger in order to receive and send messages, certain users might not want to install both for various reasons.