Geolocation on request only, Add a hint somewhere, that geolocation service is not done by MG Maps
I just recognized, that Firefox uses Google's geolocation service. Everytime I use MG Maps with geolocation service, my location is requested. I guess, MGMaps can request the actual position or not only. Maybe the request could be made, if the user wants it. The setup could be saved in the URL or in a cookie. Maybe right of the car there could be a actual position marker that could be drag'n'dropped to the list of way points.