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Best Countdown Timer Alternatives
Here are some Firefox add-ons that are similar to Countdown Timer:
CountDown
nehan
30 0.00 
(0) 
Countdown Timer
Vardy
1 0.00 (0) 
Task Countdown Timer
Mohamed Hafez
1 0.00 (0) 
Date Countdown
Vardy
1 0.00 (0) 
Toolbar Countdown
igorlogius
14 4.00 (2) 
Deadline Watch
TannhDeina
27 0.00 (0) 
Microtask Countdown
SODO66 – San Choi Dang Cap
- 0.00 (0) 
DeadlineClock
nehan
28 0.00 (0) 
TimerDrop
nehan
28 0.00 (0) Countdown Timer v5
LukeFX
- 2.00 (1) Editable Countdown
Krejzicek
4 1.00 (1) Thunder Countdown Flow
Mathieu
- 0.00 (0)