Facebook Messenger: Sign up Without a Facebook Account

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android - How to login using facebook In my webview app without typing my username and password - Stack Overflow

version 5.15.3, sign in Facebook without Facebook app installed opens a webview login webpage instead of an overlay popup · Issue #676 · facebook/ facebook-android-sdk · GitHub

Can you use Messenger without Facebook on Mac?

iphone - facebook login give me already authorized this app without automatic returning to the app - Stack Overflow

How to use Facebook Messenger without a Facebook account

You Can Now Use Messenger App without a Facebook Account