Comment Comment by that 1. go to about:config2. search for: widget.non-native-theme.scrollbar.size.override3. set the value from 0 to however many css pixels wide you want the scrollbar parent that 3 years ago
2. search for: widget.non-native-theme.scrollbar.size.override
3. set the value from 0 to however many css pixels wide you want the scrollbar