Nothing to download, nothing to update
There is no install step, no permissions list to approve up front, and no app sitting on your phone between sessions. You never have to go and fetch an update — a reload picks up the current version.
The camera works the same way
Your phone browser asks for the camera and microphone when a match connects, and you can flip between the front and rear camera during a call. The permission is the browser's, which means you can withdraw it later from the browser's own site settings.
From the home screen it opens in its own window
Once added, FunChatt opens from the icon in its own window rather than inside your browser tabs. Exactly how much browser furniture disappears varies a little by phone and browser version.
Leaving the page ends the session
There is no background service, so closing the tab or the home-screen window ends what you were doing. Nothing keeps running when you are not looking, and nothing arrives while you are away.