Obsolete since Gecko 51 (Firefox 51 / Thunderbird 51 / SeaMonkey 2.48)
This feature is obsolete. Although it may still work in some browsers, its use is discouraged since it could be removed at any time. Try to avoid using it.
MozAlarmsManager object you can use to schedule notifications or applications to be started at a specific time.
var alarms = window.navigator.mozAlarms;
navigator.mozAlarms is a
|Web Alarms API||Working Draft||Defines the extention for the