"All of them are produced with the aim of benefiting their parent corporations in some way -- for example, Mozilla Corp rents the default search engine setting to Google for hundreds of millions per year."

You've crafted a sentence that will mislead people.

Mozilla did not, and does not, make Firefox in order to generate search revenue. Mozilla makes Firefox to directly advance Mozilla's non-profit, public benefit mission to improve the Web.

Firefox is not produced with the aim of generating revenue. It never has been and it never will be.