Sorry, but I couldn't help but laugh the whole time reading this. The vast majority of these things are bullshit.
- portal detection is a plain GET request - no actual data is sent
- Google Analytics is used on Mozilla Web pages, not Firefox itself
- default search engines are meaningless, as you can pick which one to use and not even suggestions are requested without opt-in
- FHR I believe is still opt-in and also contains no PII
- Pocket does absolutely nothing unless you manually register and log in
- Auto updates are only on Mac and Windows, but if you're using either of those, you really can't complain here
That site is a good resource, but it is extremely exaggerating the situation - and that's not ok. Once you label Firefox as "spyware level HIGH", what do you call something like Windows 10? Firefox has a few opt-out points of telemetry that share no PII and aren't correlatable by design, whereas Windows 10 has no opt-out and automatically sends everything from local search queries to full binaries back to the mothership.
Saying everything is bad isn't helping anyone. We need to work on getting people off the things that actually violate their privacy (Windows, most Google products, FB, Web trackers...) and only then start working on improving the lesser offenders.
