What are you talking about? Google does not give law enforcement information without a warrant or valid subpoena.
You clearly have no idea how any of this works and are fear mongering based on sound bites you may have heard. I work in this field and I know that Google (at least in the US) won’t just hand over data without a valid warrant or subpoena. Now this can be a FISA warrant where the defendant (imo) doesn’t have proper due process rights, but it is still a court order requiring them to comply.
I’m willing to bet that the people who switch to Firefox for ad-blockers and ad-free YouTube aren’t the kinds of people who are donating much to Mozilla. People in online forums talk a big game about wanting to pay for products and not be the product. But it seems like people don’t really want to pay any meaningful amount of money for a browser.