[EXT] Scroll To Top not showing

[Gazdok]

I am using FF 52 ESR and have been using the "Scroll To Top" extension for a long time. Currently version 4.91 is installed, but it is not showing on the screen at all. I can open the options and configure it and at the top of the page I get the notice that it was saved, but it is never showing on the page.

The PC has an i7 CPU and windows 10 Pro installed with the latest feature update.

[Gazdok]

Does anyone have an idea whether there are scroll-to-top xpi versions ealier than 4.8 anywhere on the net? The scroll-to-top 4.91 is still not working.
I can set everything, but it seems to be unable to store and savethe settings.

[morat]

Can you download the .xpi file from the internet archive?

Versions for Scroll To Top
https://addons.mozilla.org/firefox/addon/scroll-to-top/versions/
https://web.archive.org/web/20170830193 ... /versions/

Versions for Scroll To Top Button
https://addons.mozilla.org/firefox/addon/scroll-to-top-button-extension/versions/
https://web.archive.org/web/20170830193 ... /versions/

Maybe download the .xpi file from the classic addons archive.

Waterfox addons
https://www.waterfox.net/addons/

Classic addons archive
https://github.com/JustOff/ca-archive
https://github.com/JustOff/ca-archive/releases