Recover from timer being killed (Android GC closing Chrome?)

[iotku]

As far as I can tell, Chrome on Android (And probably other mobile browsers including iOS safari) will close webpages to save memory, for example if you hit your home button and don't return soon, regardless if the timer is running or not.

I believe it sometimes also does this when my phone is locked/display turns itself off.

Would need to find a good way to recover correctly while still maintaining reasonably accurate time.