You don't seem to understand the point I'm trying to make. You're stuck in that the changes have been made because Mozilla want to do something new with your data.
No. They changed legalese in case someone, at some point, somehow, would try to come after them for what they have been doing - even though it would be a (legal) stretch.
All is as before.
This is exactly the same as what Mozilla are saying here:
https://blog.mozilla.org/en/products/firefox/update-on-terms-of-use/