I'd be mildly surprised if the current version remains unchanged for a long time. It raises the question of "how do I determine whether I'm one of the 'most people' who wouldn't think of you as selling my data", and I doubt they'll want to answer that.
I wish there was a way to tell the Wayback Machine to do a snapshot for historical preservation.
You can, and I just submitted the https://www.mozilla.org/en-US/privacy/faq/ URL.
At the top of the page, click "Web". On the right-hand side of the menu that appears, you'll see:
"Save Page Now
Capture a web page as it appears now for use as a trusted citation in the future."
And a spot to enter the URL.
Resulting snapshot for today: https://web.archive.org/web/20250227182726/https://www.mozil...