The relevant section isn't what you linked to - scroll down to the change in structured-data-firefox-faq.html

Here is the previous version of the FAQ: https://web.archive.org/web/20250128115051/https://www.mozil...

Here it is now: https://www.mozilla.org/en-US/firefox/faq/

All three statements about not selling your personal data are gone.

Specially bits like this: "This data may be shared with our advertising partners on a de-identified or aggregated basis."

Apologies for my previous defense of Firefox. I can't find a reason to defend them anymore.