I can't find the post, but I remember reading that they'd rather not expose full raw data because of privacy concerns — there could be a way to mine this data to de-anonymize users.

I'd love to play with the raw data too, but I understand their concern. So far many "anonymous" large data dumps ended up exposing too much (e.g. recently NY taxi data).

Oh I know this might be very sensitive privacy-wise. People should just be aware if they're contributing to a proprietary database (like Google Maps) or an open one (like OSM) when using Mozilla Stumbler.

> wifi AP database

You linked to the download page where there's only the Cell Networks database.

We're going to put some more information there on why we don't publish wifi at this point.

https://github.com/mozilla/ichnaea/issues/330

In a nutshell though, we don't know how to do this yet without creating a privacy nightmare.

Good question, I added a ticket to get this addressed: https://github.com/mozilla/ichnaea/issues/330

I wrote about some of the topics a while back. Not all of it is up-to-date but it gives the broader context: http://blog.hannosch.eu/2013/12/mozilla-location-service-wha...