I'm not sure this is a real issue, though the icons rendered as intended when opening them as a web page and also in the GUI menu of Greasemonkey web extension. https://github.com/OpenUserJS/OpenUserJS.org/issues/1951#issuecomment-1124410512 https://openuserjs.org/users/sjehuda/scripts I'm not marking the extension component because I think this is a GUI issue, if this is an issue at all.