Adds the ability to customize the requestFullscreen API with FullscreenOptions on Android. This allows developers to chose between making the navigation bar visible versus a completely immersive mode where no user agent controls are shown until a gesture is performed. Some developers may prefer that the navigation bar be visible when entering fullscreen mode as it can be difficult for users to determine how to exit fullscreen mode. Some browsers such as Samsung also make this the default.
Docs: https://github.com/dtapuska/fullscreen https://github.com/whatwg/fullscreen/issues/123