What a 1 minute timer is good for
Steeping tea, a plank or a set of stretches, a quick breathing exercise, or brushing teeth for the full two minutes.
The countdown runs against your device clock, so it stays accurate if the tab is throttled in the background. At zero it fills the screen with a Stop button, plays your chosen sound, and vibrates on phones. Prefer a clock time instead? Use wake me up in 1 minute.