alarms does not triggers under 1 minute even in debug

Hello,

I tried to convert an existing Chrome extension that uses alarms API. When you load the package in developper mode, you can put a "PeriodInMinute" under 1 and it triggers the alarm correctly.

In safari, after running in Xcode the converted App, the Alarms seems to be triggered only each minute.

Is there a way to allow alarms to be triggered under 1 minutes using Safari ?

Thanks !