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Best Cool Sci-Fi Alternatives
Here are some Firefox add-ons that are similar to Cool Sci-Fi:
Sci FiBlue theme
ArimdeR
1 0.00 
(0) 
Blue and black SciFi
Shadow
- 0.00 (0) 
Retro Sci Fi Anime Inspired
River
1 0.00 (0) 
cyberpunk_AA
Walid Ahmed Samy
1 0.00 (0) 
Cyberpunk
Nate
1K 4.65 (51) 
Green Synthwave Galaxy Theme
Jansin3
- 3.00 (1) 
Science Fiction Cyberpunk
Edward
- 0.00 (0) 
Elemental
Geoffrey
1 5.00 (2) 
Space Travel (Green)
local.orange.cat
1 0.00 (0) 
Abstract Galaxy
Fowtowsjop
- 5.00 (1) 
Shades of Green
Grvmvtic
- 0.00 (0) 
supernova_simple
kz6fittycent
- 0.00 (0)