>What if, instead of companies taking your data without giving you a say, you could select who gets access to your data and put it to work for public good?

Implied false dichotomy. What if I refuse to use companies that do not fully encrypt my data in such a a way as to them not having any access to it.

Also, Mozilla isn't going even half this far. They are relying on a contractual obligation with their partners and internal audits to protect my identity. I'm skeptical of their ability to protect my data to the point I will never use this service.