Thanks to Barry :
Add
Code: Select all
gtk-primary-button-warps-slider = false
to root/.config/gtk-3.0/settings.ini
and add:
Code: Select all
scrollbar {
-GtkScrollbar-has-backward-stepper: true;
-GtkScrollbar-has-forward-stepper: true;
}
to root/.config/gtk-3.0/gtk.css
The first change will re-enable clicking on the scroll bar and moving only a page at a time (instead of all the way to the end).
The second will add missing scroll arrow buttons back. This affects not only Seamonkey, but also late Open Office, and any other program that uses gtk3.