I use Mint 19.3 and is attached to a hardware product Winston Privacy which due to lack of sales the piece of Hardware is no longer available but the Hardware I have has a Lifetime License in the firmware. My point is the tracking that Mozilla does seems to be very high with Mozilla even though I have turned off the tracking with Firefox. As you can see with the attached file 'ScreenShot1' Pie graph Domain 'incoming.telemetry.mozilla.org' is the majority of the pie which has a count of 61 blocks. File 'ScreenShot2' shows the actual number count for the Domain.