Rumble events may be received for controllers that are no longer present or attached
so they should be dropped instead of being forwarded to JS for handling.
Adding fullscreen class to the #listener seems to fix the game stream
getting stuck in a black screen. I suspect that #main-content isn't
recomputing its layout when #listener is resized.
Moonlight's fullscreen requests generally conflict with
what ChromeOS is trying to do automatically for the app, especially when
using tablet mode. Just remove it for now and let the OS handle
fullscreen.
utopiafallen