It provides a convenient way to stay in touch with family, friends and co-workers-and now you can use it without a dedicated app! Facebook Messenger – Overviewįacebook Messenger is an app-based instant messaging service that lets you send and receive messages, pictures, videos and other multimedia on almost any device. Explore how to use Facebook Messenger without having to download an additional app, what features are available to users who don't have the app installed, and how to troubleshoot any issues that might arise. But did you know that you can use Facebook Messenger without downloading a separate app? That's right – you can access all your messages, files, and contacts via your browser or mobile device just like you would with the app. Whether it's for keeping in touch with friends and family, sending important documents, or just staying connected with the world, Messenger is a great way to do it. Facebook Messenger has become an essential part of the modern day communication toolbox.