If you rely on Google donation in order to survive, at the end of the day you are under some sort of control. I’m not saying that Google is running Firefox directly, of course, but if Firefox would grow enough to became a problematic competitor for Chrome, they would definitively have the power to step in. So, how really free can they be?
While I like those options, they are definitely not for everyone. Those problems are collective, protecting the privacy of 1% of the population is as good as protecting nobody.