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Best Countdown Timer Alternatives
Here are some Firefox add-ons that are similar to Countdown Timer:
Countdown Timer v5
LukeFX
- 2.00 
(1) 
DeadlineClock
nehan
28 0.00 (0) 
Countdown Timer
Vardy
2 0.00 (0) 
Task Countdown Timer
Mohamed Hafez
1 0.00 (0) Stopwatch Timer Countdown
Betcm
2 0.00 (0) 
CountDown
nehan
30 0.00 (0) 
CountDown
domroa
1 0.00 (0) Microtask Countdown
SODO66 – San Choi Dang Cap
- 0.00 (0) 
TimerClock
Wickskymoa
1 0.00 (0) Countdown Timer
Hinson
1 0.00 (0) Quick Countdown Timer Lab
Kimberly Nelson
- 0.00 (0) Multi Timer & Stopwatch
Sunwin
4 0.00 (0)