Created attachment 527044 [details] screenshot The supported browsers section on the marble run demo is never seen even after scrolling to the bottom of the page See the attached screenshot
This is because #firstVisitContainer is "position: fixed;". If "absolute", then we see "behind" the black veil. David can probably fix that.
Should be fixed per davids email (works for me). Please test.
verified fixed https://mozillademos.org/demos/marblerun/demo.html