Android apps can make use of a WebView (web browser that runs inside the app).
Depending on the Android version Google preferred used Chrome webbrowser app to provide this WebView or the Chrome based WebView app.
Any other WebView capable web browser can also be used.
Go to Settings -> System -> Developer options -> WebView implementation to see and ...
You need to know this before disabling all in-app browsing,
In-app browsing is a required component by built-in requirements in order for web functions to render properly, as described by Google:
Android WebView is a system component powered by Chrome that allows Android apps to display web content. This component is pre-installed on your device and should ...