I love using Facebook's messenger.com web app but don't like the Messenger Universal App for Windows.
So I thought I'd create my own Hosted Web App wrapper for messenger.com.
The process seemed simple. And it was. The app opens and loads messenger.com.
But, the second you click the Login button it kicks you out to a browser window.
Is it possible to log into a 3rd party service in a Hosted Web App?