"Non-profit" doesn't mean that money magically appears out of nothing.
> pushed me ever closer to just giving up and going to Chrome, where at least they exploit me in predictable ways.
Chrome is worse, and the ways are much more intrusive. They aren't even predictable. If people keep attacking Firefox like that, there won't be any choice but Chromium/Google, and then it will get even worse.
In Firefox you can usually turn off the things you don't like. Just turn it off.