At some point Google will get tired of this and will withdraw from the agreement. They won't be the default search provider, but that will play to their advantage - Firefox out-of-the-box user experience will take a sharp nose dive. Say all you want about DDG and alternatives, but they still can't hold a candle to Google's search quality. So what Mozilla will end up with is (a) a dip in funding and (b) a dip in the user share. This might be just enough to either make them reconsider their ethics or to kill Mozilla altogether.
So, yeah, a good CEO that can shed the Google dependency is very much required.