The CEO promised to move away from Google and to not solely rely on their revenue 16 years ago [0]. Nothing has changed and now Google is going to get broken up and it includes ending this deal directly affecting Mozilla. It's quite frankly Mozilla's fault for not looking for sustainable sources of income.
Mozilla should really have gone through the Rust consultancy route. Now, there is no way out other than begging to the courts and hoping that it doesn't get cut.
Oh dear.
[0] https://web.archive.org/web/20120105090543/https://www.compu...