Privacy
Your browser asks for permission before it shares your location. Nothing is read until you allow it.
When you allow it, your coordinates are sent to this server so it can format them as C# double values and look up your address. The address lookup is made from the server to OpenStreetMap Nominatim, with the coordinates rounded to about 11 metres. The map is shown from OpenStreetMap.
This app does not save your location. Recent address lookups are kept in server memory for up to an hour to avoid repeat requests, then discarded.