This plugin does what it is intended to do. It fakes GPS coordinates for browser and does not provide a map. Also it has usefull feature for faking not only static position but it also can fake movement on track.

The app gives an image claiming there is a map. There is no map. The localhost:8080 on the blurry screenshots do nothing. The development mode for this app is hard to use and there's no map. Where there should be a map it is completely blank. The app only allows raw number inputs which are useless. It needs a map.