Found a ? bug
this addon conflicts with scroll to to addon
tested both
https://addons.mozilla.org/en-US/firefox/addon/top-and-bottom-scroll-buttons/
https://addons.mozilla.org/en-US/firefox/addon/scroll-to-top/
this addon caused the top bottom button to follow the page when scrolled up/down
kindly fix if possible. Otherwise its a great addon.