How to add Stop/Reload Button Firefox Addressbar again

  address-bar, button, firefox, reload, windows

I accidentally removed the Reload/Stop button in my Firefox and wanted to add it again. Unfortunately I can neither move it nor adjust it again.
I would like to have it again as inserted in the picture below with the reload button:

Firefox Addressbar with Reload Button:

MySystem: Windows 7 64bit / Firefox 82.0.3

Maybe it could be a solution to edit some file or to edit a parameter in the the about:config command?

I’ve just tried this here but no success:

Can someone please help me here?

Source: Windows Questions