Colorful Fractal

Aurora Australis

You can get similar desktop backgrounds here http://www.hqwalls.com/2009/11/aurora-borealis-abstract-widescreen-backgrounds.html

I want to say thanks to everybody that is using this theme (above 20k daily users) and thank you for the wonderful reviews.

BlackR

Blue bokeh dark

Black Abstract Fox

Stylus Green

Stylus Green Persona, BY: Michael E Herndon, Thamyris, Thamyris71.

Clean and Professional

Clean and polished theme for Thunderbird and Firefox.

Grey and Grey

Just Grey

Colour Waves

Weird colours mixed together in Photoshop. Looks really cool.

Abstract Dark 4K

Abstract Dark 4K • The Firefox Theme 'Abstract Dark 4K' is (c) 2017 by Band1to. - All Rights Reserved.

metal paint

violet pink red aqua light blue golden metal paint

Abstract Electric

Colored electric waves

Go Green Floral by Lucky9

Go Green Floral

evil robots