I want to hide the status bar / statusbar on Android (instead, I want an full screen / full-screen / fullscreen app).

Hiding the status bar is not that good in terms of Google GUI guidelines in combination with web content, so it’s not the default option in WebViewGold and would require some further modification. The best choice would be to use the included WebViewGold features for styling the background and text color of the status bar (e.g., the same color as the web app header).