Who owns Mozilla? Put another way, if Google stops funding Mozilla, will it still exist?
The only reason Firefox exists is because Google wants something they can point to in court and say "look! we're not a monopoly!"
I'm guessing you're referring to the search partnership between the two? That doesn't mean that Google owns Mozilla, unless you're really unclear about what "partnership" or "deal" means. Mozilla have multiple deals with search engines, not just Google.
https://github.com/mozilla/standards-positions/issues/852
I guess they would.
The internal organisation of Mozilla doesn't really seem relevant here.
A competitor that survives at the charity of a monopoly is evidence of a monopoly, not evidence of the opposite. A court might see a non-profit that is directly dependent on Google for ongoing operating cash very differently that how it saw Gates' one-time personal investment in Apple.
If Google stops funding Mozilla, would they manage to get another deal, e.g. with Bing? If so, the power of Google would be limited.
Also, Bing has on average twice higher RPMs, so, a 50% of drop in income after rev-share.
So, you remove 90% of the revenue, and you divide by 2 what is remaining.