If you’re upset about that, you know nothing about IP law.
If you do not grant Firefox a license to use your information, the only thing they can legally do is destroy it. So no storing of bookmarks, usernames/passwords, search history, browsing history, no saving your open tabs so your next session picks up where the last ended, none of the things that we all expect of a modern browser. Without that, you’re basically left with just a URL bar with no search ability.
They’d gotten by without that clause for a while despite being technically illegal in the EU and California. And again: what’s the alternative? Chromium has the same thing, and no Firefox fork can exist without mainline Firefox.
They’re mostly [Trade deficit]/[Exports to US]
Which is a fucking stupid basis for tariffs.