Why do I see a strange code but only on Firefox?
This has been a bug in modernizr.jshttps://hashnode.com/post/dude-that-carpet-really-tied-the-room-together-cjc225hrm05iz9cwuz18md3mohttps://github.com/Modernizr/Modernizr/issues/1052
it's fixed in the newer versions. Either update your theme and see if they load a new version or get the js here and replace it in your theme-file. https://cdnjs.com/libraries/modernizr