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Best CoolBox Alternatives
Here are some Firefox add-ons that are similar to CoolBox:
Schoolbox Themer
Jimothy
3 5.00 
(2) 
Skool Extensions
Marco Berlin 🔥
26 5.00 (1) 
Schooltape
42willow
16 5.00 (3) 
Baulko Clock
circles.png
3 0.00 (0) 
Modern Classroom
Quatrazoid
19 4.67 (3) 
DevBox
gdotdesign
10 5.00 (1) 
LibrusPro
Maks Kowalski
1K 5.00 (16) 
Smartschool PRO
Taru
24 4.50 (2) 
Smartschool++
sibe
32 5.00 (5) 
Smartschool Dark Mode
Van de Voorde Matthias
12 0.00 (0) 
Weather Customize
Temia
- 0.00 (0) 
ManageBac Pro
Jadua Studios
3 0.00 (0)