btw. I wonder if this would also work as smooth as it does now in webkit, when you would add all the -moz- to it and then test it on a Firefox OS phone.
Runs smooth, comparable with Firefox Desktop Browser. But the scrollMask doesn't fade nicely and I have no clue why this happens. You can reproduce it using regular Firefox Browser (use Tools > Web Developer > Responsive Design View).
Changes on github: https://github.com/c2prods/Project-Tyson/pull/4