Currently, Google pays Firefox’s bill by having them set their default search engine to Google.
This will no longer be when Chrome is in the hands of another party. DOJ is currently advocating for this forced sellout.
So will Firefox be no more after that?
You’re missing the point as to why Google is paying Firefox and @dysprosium said it
Chrome is there to collect data in order to target adds, sell them, and show them. It’s a vehicle.