The countdown timer should:
- last for 14 minutes and 24 seconds from the time the user visits the website,
- stay active and counting down, even if the tab is inactive,
- chime at the end of the countdown and display an option to repeat.
The code I have written manages the first two tasks - it counts down and it holds an accurate count even when the tab is inactive - however it does not *always* chime and does not *always* show an option to repeat the countdown. Sometimes the countdown simply continues.
I'm looking for somebody to help fix this so that it works across all mainstream browsers: Chrome, Firefox and Safari, without the use of WebWorkers.
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