A simple browser extension for creating timers.

Available for download at addons.mozilla.org, Chrome Web Store and Microsoft Edge Add-ons.


Use of the extension is primarily through the use of the omnibox. To create a timer page enter tid followed by a duration or specific time. For instance tid 10m.

Time Example
relative 30s, 20m, 1h
absolute 12:30

Advanced usage

The extensions parser understands a couple of operators.

Operator Example
+ (addition) 20m + 10s, 12:30 + 1h
- (subtraction) 20m - 40s, 12:30 - 5m
% (modulus) %20m, next even 20 minutes