By default, many apps open links inside the app using an in-app browser. On Android, this is a version of Chrome, called Chrome Custom Tabs, optimised for in-app use (1).
When in-app browsing is disabled, clicking a link results in the default browser app opening and rendering the webpage.
To disable in-app browsing on the Facebook app, users can go to Setting > Media to find a checkbox related to this behaviour (2).
How can in-app browsing be disabled in the Facebook Lite app? This light version does not seem to include the same checkbox as the regular Facebook app.