One of the major sellers of detailed driver behavioral data is shutting down
arstechnica.com
arstechnica.com
Why hasn't the Mozilla Foundation created a search engine like Brave to avoid the privacy problems with Google? It can't be that expensive if Brave did it.
That said, developing, and operating a search engine is no small lift. Brave did it by acquiring/acquihiring another company. While I suppose that's in the scale of the Mozilla Foundation's budget, I suspect it would be a bad move for them.
Primarily, in terms of politics and partnerships, and maybe the motivation of some of their staff to remain gainfully employed, I expect they have fairly strong incentives to stay out of the search market.