Wait, how is read/write permissions to messages (assuming that’s what you allude to) in any way necessary? On iOS at least, apps can’t even get access to your messages, and sharing works very well. I must misunderstand something.
No, they mean Facebook Messenger. The extension can be used for things like collaboratively creating a playlist with contacts in Messenger, sounds like that would require being able to read messages from Messenger and write messages to it.
