Super cool.

beautiful theme that comes out with all kinds of backgrounds

I really liked this one! Until, that is, it caused the memory pressure on my laptop to skyrocket to the point where it would periodically force me to quit Firefox. This only started after a major update relatively recently, so i believe it is fixable. I'm leaving this review in the hopes that it will be fixed.

Mr.Cline: A flashy yet smooth animated purple and blue theme with glowing rain.

I agree with him there... and, it is slow, so not too distracting.

Its brilliant! Like lasers raining in the night sky