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Best Proton modern theme Alternatives
Here are some Firefox add-ons that are similar to Proton modern theme:
Proton Dark Theme
lilaMitaka
3 5.00 
(1) 
Proton Dark
DaBluLite
8 5.00 (1) 
Proton Deep Dark
scde
- 0.00 (0) 
ProtonPro
Ben013
2 5.00 (2) 
Old dark theme (for proton)
Kilanater7
1 0.00 (0) 
Proton Darker
Ylor
- 0.00 (0) 
Proton Dark (FF Theme)
Jack Hannon
1 5.00 (4) 
Modern Light Proton
MrLuxury
- 5.00 (1) 
ProtonMail
Themist
29 5.00 (2) 
Classic like theme for Proton
SimpleThemes
3 0.00 (0) 
Simple black and grey
Samlh
- 0.00 (0) 
Subtle Proton Dark
nrayamajhee
- 0.00 (0)