"How do you want to start" is asked always after page reload.
Need to ask only on first time or when location is not available
Firefox 49.0, Windows 10
IE 11, Windows 10
In both of those browsers you have the option to "Always allow positioning", in which case you won't be asked to select a location again. The only exception is Safari, that only allows you to allow positioning for a day, after which we have to ask again.
In other words, this is a browser-defined fact that we cannot change.
I suggest we close this issue.