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.
More Abstract Themes
this is an awesome theme for firefox wish i could use it on my site
Rated 5 out of 5 stars by lo primario on August 12, 2016
Sieht toll aus :)
Rated 5 out of 5 stars by Julia_195 on May 25, 2016
Looks great! Need I say no more.
Rated 5 out of 5 stars by BonsaiGil on February 23, 2016