after reading the privacy site that doesn’t sound too bad. or at least “tracks you private data and shares it with their business partners” bad which makes it sound like they are literally spying on you.
they do send telemetry data yes, but not your ip or anything that could be used to track against you, they do share some data while using the search function from url bar which is prettt much necessary and that seems to be only the stuff you typed.
most of it seems to just be about sponsored content where they send the amount of clicks and time when those clicks happened so advertisers know some statistics and advertisors get their royalties. firefox does suggest you content based on your browsing history but that happens locally. in no point does you browsing history go outside your computer, which is the most important part to me. they do know what was suggested, but not how it was suggested
so in conclusion, they do send some device information, information about your clicks and where those clicks happened and some other very basic telemetry with no information that could be tracked to you.
of course if one want the ultimate privacy that can be a dealbreaker. but to say that they collect your private data is quite an overstatement imo. I couldn’t give a damn if my browsing is part of some anonymous statistics.
but yeah in a way you’re correct, they do collect data. like almost literally every application does in the modern era