The timers in the Chrome Stopwatch is controlled using the three default buttons located at top of application.
Also, the timers can be directly controlled using the Chrome buttons on the Stopwatch.
For example the Top Chrome button automatically changes between the 'start' and 'stop' states.
Stopwatch-Mode is used to track long running operations.
Countdown-Mode is used for common events, like tracking breaks at work.
The Chrome Stopwatch's right button is used to change modes.
And the Chrome Stopwatch's left button is used to reset timers.