@cheeaun playing around some more, I think this might indeed be Firefox's fault. I don't know another site that uses left/right scrolling, so I'm not sure about that. It's specifically far too sensitive left/right and really messes up the boost carousel, which is the only part of it I can't figure out how to work around. I saw something scroll-related in your recent commits, but if you say it's unrelated, I trust you. Sorry for a false report.