This area is to test or toggle unstable features that don't have options on the settings page. Most of these settings are only stored on your device. Clearing history or logging in to another device may require you to re-enable features.
Make sure you refresh the page after changing any of these settings.
Window Settings
Fade out in seconds
Faded dialog opacity: %
You may notice your chat/notifications windows not showing up. This will reset them to their default location.