Doing things the right way. The natural way. To wit, this article discussing various visual and functional ergonomic issues and bugs in the Plasma desktop environment, including scrollbars, hot corners, text editor interface, application toolbars management, pinned icons, shortcuts, other inconsistencies, and more. Take a look. https://www.dedoimedo.com/computers/plasma-ergonomics.html Cheers, Mrk
The scrollable area is wider than the slider width, not too bad. Of course, having the ability to change the width would be nice. Firefox and Chrome aren't part of Plasma and so the Plasma team is not to blame here But the slider width can still be altered by the user in ~/.config/gtk-3.0/gtk.css for gtk3 apps other than Chrome. AFAICT, /usr/share/themes has only gtk-related themes, not Plasma ones. Also, I'm not sure "You will need to reload your user session for this, which is annoying" is necessary.
