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Best Harbour Alternatives
Here are some Firefox add-ons that are similar to Harbour:
Victoria (Purple)
Oussama homida
- 0.00 
(0) 
Transition Colours
Ash
- 0.00 (0) 
Forest tones
R. Hansen
- 0.00 (0) 
theme for firefox
Renuka Kujur
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colourfulx
kitz
- 0.00 (0) 
a comfort place
sierracs.dev
- 0.00 (0) 
Blue n' Gold
Duncan Minivanius
- 4.00 (1) 
Mozilla Firefox- Theme
Sujan Shrestha
11 5.00 (3) 
High Contrast - Valentine's Day
TheWolfBunny64
- 0.00 (0) 
Personal theme
bbandreasb-1364594476.45
- 0.00 (0) 
my new theme
cc
- 0.00 (0)