they want to collect data to train their bullshit AI projects
I don't think it's that innocent. They've been removing features and firing devs and instead funding research into how to censor the open web for years now.
https://foundation.mozilla.org/en/blog/fellow-research-decentralized-web-hate/
And just recently they announced a whole brand refresh to make clear that they are not 'just a technology company', but rather a "global crew of activists".
https://blog.mozilla.org/en/mozilla/mozilla-brand-next-era-of-tech/
I think they want your data to identify wrongthinkers.