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Best Stay Sharp Alternatives
Here are some Firefox add-ons that are similar to Stay Sharp:
FocusShield - Block Distractions
NexLifyy
1 0.00 
(0) 
Focus Blocker
123WIN
- 0.00 (0) 
Site Blocker
Serafim Mijo
28 0.00 (0) Focus Shield
Bem88
- 0.00 (0) 
StayFocused
Mohammad Anwar
237 3.00 (2) Site Blocker
Jay
36 5.00 (1) 
Focus Lock
Roberto Esparza
20 5.00 (1) 
Focus Lock
surya
8 5.00 (1) 
Website Blocker
SleekAddons
1 0.00 (0) Block Sites i
HB88
- 0.00 (0) StayFocusd Lite
stayfocusd
35 0.00 (0) 
Pokus - Stay Focused
Eduardo Fran
15 0.00 (0)