Eh? Says who? Them?
So many times, companies have lied, cheated, made excuses. So many times "we don't", then they do.
So. Many. Times.
So I should just trust Mozilla, because... well, why?
And this doesn't even take into account new corporate owners, leveraging existing data in a new way. Or rogue elements in corps, employees stealing data for profit, or even data leakage due to misconfigured servers.
These thongs have all happened.
Corps have left dumps of entire client databases, credit cards, id, on open portals!
Over and over, again and again, we have been shown, never ever trust anyone with your data. Ever.