Firefox is trying to gain back user trust with this video: https://www.youtube.com/watch?app=desktop&v=O-xyNkvIB9g

This is a legit question: Should anybody trust Firefox again unless they put "we won't sell your data" back into the privacy policy? I'm actually not sure if they haven't already done so, let me elaborate:

https://brave.com/privacy/browser/ Brave: "We do not sell, trade, or transfer your information to any third parties." This seems to obviously be in the legally binding text part. As is this one: "It’s Brave’s policy to not collect personal data1 unless it’s necessary to provide services to our users, or to meet certain legal obligations. We do not buy or sell personal data about consumers." (Disclaimer: I'm not a lawyer.)

However, for Firefox it seems ambiguous to me, which worries me: https://www.mozilla.org/en-US/privacy/firefox/#notice There is no appearance of "sell" in the entire privacy document, excpet for the top summary where i'm not sure if it's at all legally non-binding.

Does anybody know if it is legally binding? If Mozilla were serious about it, why would they leave it ambiguous whether it is...?

Based on that, I'm not sure if Mozilla's video about getting users back is worth trusting. I wonder if it's just me.

Update for clarification: I'm not using Brave myself, and this isn't a suggestion anybody should blindly do so.