Would the svg version of the icon be available someplace? I could generate icons of different sizes so that they could be used with different screen resolutions. Currently, sometimes I don't get an icon on my bigger screens (and I assume the issue is that there is a single size icon available for zathura only):

$ rpmls zathura | grep icon
-rw-r--r--  /usr/share/icons/hicolor/128x128/apps/org.pwmt.zathura.png