This theme is not compatible with Firefox Containers. Other themes have visual cues that showcase which container is being used. This theme does not have such cues. Apart from that this theme does not have anything else as a negative.

Moderno, y elegante. No cansa la vista y se visualizan comodamente las pestañas. Felicitaciones!

A modern geometric design that works really well across most web pages (it does clash a little when on this on this specific page due to the dark purple, but most pages aren't like that).