Its usage and the data it collects are not malicious or done to track you. "Data collection" is arguably a clearer name than telemetry to the average user and is clearly labelled, and can be disabled in a single checkbox in settings. It is transparent.

"Its usage and the data it collects are not malicious or done to track you."

There is tracking also for ad purposes activated by default in firefox. A recent developement. Before the tracking was ocasionally and hidden under "studies". Firefox in its default settings spies on its users and sells this data to advertisers - that is the situation.

On the frontpage FF is advertised as privacy friendly and there is 0 indication that FF itself will also track you.

If that is transparent to you, than we can just agree to disagree.