Great extension, straightforward and minimalistic!
Could make it a little more obvious you can rename saved locations/timezones as I was about to suggest this, but otherwise as I said very helpful extension :)

really like the UI, and it's easy to use :) I do have a suggestion, I would really like to be able to set one time zone to the 24hr clock and a different time zone to the 12hr clock at the same time, instead of making all time zones set to the same clock. keep up the good work :D

time.