@PorFin
I mean the code for those trackers is empty, and does absolutely nothing.
There are other requests the browser makes
- tracking protection lists
- safebrowsing lists
- search engine update lists
- add-on lists
- blocked add-on lists
- update checking
- feedback reporting
- release notes
- mozilla news snippets
- pocket integration
- error reporting
- crash reporting
- wifi location lookup
- network connectivity checks
- firefox sync
- etc.