Add custom scrollbar CSS for code examples
It would be nice if the scrollbars for the code examples matched the styling of the rest of the box. I know this has limited browser support for now.
We shouldn’t do anything to the site’s main scrollbar. I think fiddling with the browser chrome could be pretty confusing for a lot of site visitors, and is largely unnecessary.
See https://css-tricks.com/the-current-state-of-styling-scrollbars/