> Firefox will send Mozilla search queries (what you are typing into the address bar), and city-level location (what's nearby and relevant, determined from your IP address). Firefox also informs the service if you click on a provided suggestion.
Combine this with "studies" which were never made public, extra avenues of telemetry that one finds out about waaaayyy after the fact etc, the last couple of years have seen Firefox become increasingly hostile to users.
[1]: https://support.mozilla.org/en-US/kb/navigate-web-faster-fir...