Hold down Shift while scrolling.


On 5/16/20 5:58 AM, users-request@lists.fedoraproject.org wrote:
Until recently, Firefox had a feature I really liked and used a lot: if
you clicked anywhere in a scroll bar other than on the slider, it would
jump instantly to the top or bottom of the page. This seems to have
gone, and clicking just scrolls the way it does in most browsers. Does
anyone know if there's a setting to control this?

poc