No Scrollbars in Firefox 57

I’m here in the Firefox 57 Nightly build, trying to salvage something of the user interface I got used to in Ffx versions past.

E.g. The addon, “Stylish”, is dead here. “Stylus”, supposedly a substitute, is almost as useless.

If nothing else, I wanted to not have to see horizontal and vertical scrollbars. It is still…