I really like the subtleties of this theme. It has great qualities. If possible, I would like to suggest the possibility of either framing the pinned tabs with white or a light color to help to demarcate the different dark spaces. Maybe I can do that with the basic firefox settings somewhere. I plan on enjoying this one nfor a long time.

I love this Fractal add-on, it's beautiful, intricate, classical, elegant and yes, the colours are restful! I also love that I can easily read my toolbar and tab details, it's perfect.