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Best SimpleBlackout Alternatives
Here are some Firefox add-ons that are similar to SimpleBlackout:
Black whit
GAMES PL
- 0.00 
(0) 
Black and Blue
Luiz Henrique
- 5.00 (1) 
BlackAndBlueAndWhite
Fantasma
- 0.00 (0) 
preto/black - azul/blue
RJAbade
48 5.00 (2) 
Branco no Preto
José de Castro Arnaud
36 0.00 (0) 
roxo_preto
Diego
21 3.50 (2) 
Minimalista Dark
Lucy
1 5.00 (1) 
color brushe azul e preto
maubuscape
- 0.00 (0) 
Preto no Branco
José de Castro Arnaud
7 0.00 (0) 
Minimal Black
Firefox user 10204762
- 4.33 (3) 
Preto e Branco
Satinilo
4 3.50 (2) 
Testing Black
Rafael Venâncio
- 5.00 (1)