Adds a clean set of up/down/settings buttons. Settings panel includes a hide timer and a transparency toggle.
this is a very helpful userscript that allows you to scroll to the top and bottom of a web page.
Marjanoo edition - where you have the option to make the button transparent (so that the buttons won't get in the way):
https://greasyfork.org/en/scripts/546045-scroll-up-and-down-buttons?version=1664766
