Since the integrity environment gunk, I've switched all boxes over to use Firefox as primary. This took a lot of configuring, as Firefox out of the box brings… a lot of stuff I don't want.
One of those things is telemetry — whatever that means to Mozilla — that was tamed only with a combination of an enterprise profile (hi sudo!) and user.js hacks.
However, the policy and user.js changes don't work on the Ubuntu box, where I've installed Firefox from the PPA to get it out from under Snap (and thereby usable with a password manager). The policy locks down and disables the right configs and the configs all have the right settings, but it keeps pinging incoming.telemetry.mozilla.org. Two Macs and a Pop!_OS box don't ping Mozilla at all with these settings.
No harm no foul, I just blocked them in NextDNS and laugh in their general direction. I just wonder what else is different in the PPA.
You can type
about:telemetryinto the URL bar to see what it sends.well i feel stupid now for not doing the obvious. but…
on the PPA box, this is what it showed me (meanwhile it was attempting to connect to incoming.telemetry.mozilla.org). another symptom of displaying respect for enterprise policies but in fact ignoring them. (as i had mentioned, on this box all of the settings look locked down as they should be, but it's still attempting to send telemetry.)