WHAT'S SO SPECIAL?
If the time remaining is less than 10 seconds, it beeps.

WHY THIS EXTENSION?
Since the era of Work From Home began, we've experienced a rising "Strict Monitoring Attendance System". As per the inputs from my friends and colleagues, most of the companies have the time slot of 45 minutes. If the slot isn't renewed, then the time is not considered. Hence, this extension beeps when the time remaining is 10 seconds.