While it's a small thing, it bothers me a little, because scroll bars won't display correctly on firefox, it appears default firefox white bars instead black bars (I assume black bar is the intended way, because all site got black background and chrome displays this middle bar black) Both my windows 10 and firefox are fresh installed, no extensions or modifications on browser, it's in your original state! Some images to better understand the problem: Not sure it it's a site issue, or a firefox one... Any help appreciated!