@michi@social.tchncs.de

I'll dive deeper into the Play Services thing. Actually I know about the advertising ID and routinarily change it (but I'd like an App that change it once an hour... i looked to write it myself but apparently I can't find the proper Android's API to use).

As for the Tor Browser's plugin, I'd say it doesn't take #uMatrix into account.
It prevents third parties HTTP requests to be sent, so there's nothing to anonymize.