That is the great thing about firefox, when I disable the telemetry which they make extremely easy to do. I can be certain that it is actually disabled. Unlike the shady practices Chrome uses where I never feel comfortable or like they are telling me the whole story. Hidden options and settings force me to not be able to feel safe using their product after an update. I have stopped using Chrome entirely over 3 years ago and have no tried it since. Too many shady and irresponsible practices at play there.

Not all probes are active at all times. They are all defined in the descriptors that I’m including links for. [1][2]

They all include expiry dates, and probes with perpetual lifetimes require devs to take responsibility for them.

All probes need to go through the data collection process outlined at [3].

[1] https://searchfox.org/mozilla-central/source/toolkit/compone...

[2] https://searchfox.org/mozilla-central/source/toolkit/compone...

[3] https://wiki.mozilla.org/Firefox/Data_Collection

What kind of audit?

Every telemetry probe requires a privacy review in addition to the code review. If you want more, the source code is available online. Do you have more in mind?