According to MDN you can choose one of the following MIME types: text/plain text/uri-list text/csv text/html image/svg+xml application/

According to MDN you can choose one of the following MIME types: text/plain text/uri-list text/csv text/html image/svg+xml application/xml, text/xml application/json So at the very least there's image/svg+xml, but that is pretty limiting.