interesting, do want more information on this. Can someone who work for Mozilla care to comment on this? If this is true, then I would rather be using brave or ungoogled chrome build than Firefox.
The big advantage of using Firefox that you don't get with Brave or UnGoogled Chromium is that you are supporting browser engine diversity.
To what end and through what means, though? Do you really think Mozilla would never do anything nefarious with the data that they collect? They would never, ever, swear on their mother's grave, sell that data to a third party, is that what you believe?
You're replying to a comment about browser engine diversity, which is largely decoupled from privacy.