Just copy your PNG icon file to /usr/share/icons/hicolor/[SIZE]/applications
Then run the command: “sudo gtk-update-icon-cache /usr/share/icons/hicolor”
That’s it!
Just copy your PNG icon file to /usr/share/icons/hicolor/[SIZE]/applications
Then run the command: “sudo gtk-update-icon-cache /usr/share/icons/hicolor”
That’s it!