I copied and pasted a comment from a reviewer/user that someone could comment on?
"Mozilla: another reviewer made a relevant statement. You have really streamlined the header (thank you!), but we only see a small strip of these beautiful themes. Would it be possible to add levels of transparency so that on certain pages (New Tab is all I can think of right now) we could use the entire theme as a background? As a person with chronic migraines, I try to avoid large blocks of stark white and beautiful themes like this one would be better as a background than a muted, solid color.