

Mozilla Stumbler
Mozilla Stumbler is an open-source wireless network scanner that collects GPS data for the Mozilla Location Service, our crowd-sourced location database.
Retired in February 2021: https://discourse.mozilla.org/t/retiring-mozilla-stumbler/75206. No longer works with Android 10. Mozilla announcement suggests
Tower Collector as an alternative.
Features
- Location-based
- Network Scanner
- GPS Location Tracking
Mozilla Stumbler News & Activities
Recent activities
Mozilla Stumbler information
What is Mozilla Stumbler?
Mozilla is a nonprofit project and global community building a better internet. Mozilla Stumbler is an open-source wireless network scanner that collects GPS data for the Mozilla Location Service, our crowd-sourced location database. As you move around, the app "stumbles" upon new Wi-Fi networks and cell towers. The Mozilla Location Service combines these wireless network measurements to provide geolocation services for Firefox OS devices and other open source projects. For more information, visit our project page: • https://location.services.mozilla.com
How to use Mozilla Stumbler • The app stops/pauses automatically when you are not moving or your battery is low. (This feature works better on newer devices as they have better sensors). • Go to un-stumbled areas (not covered in blue) to fill in the coverage map: https://location.services.mozilla.com/map • Improve the accuracy of the service by stumbling in the blue areas. • Try walking, biking, or driving new routes with Mozilla Stumbler every day! • Start with major streets and intersections, then explore smaller streets. • Your contributions will take a day to show up on the coverage map.





