Did you even check out the link? There is nothing sensational or exceptional about collecting/sending basic user data when using certain features, most of which can be easily disabled/not used.

"Easily disabled" for example like tweaking about:config? Yeah, that's super easy and accessible for the average user!

The fact that he only lists the about:config way doesn't mean that this is the only way to do it. Many of these options have GUI prefs.