Most people aren't aware of the difference between
Mozilla Foundation (the non-profit that most think of as being "Mozilla") and
Mozilla Corp (the enterprise that gets around $500 million per year from Google, is said to have a war chest of around $1 billion, pays its CEO about $7 million per year, still lays off staff, and lets Firefox slowly and silently decompose while it ventures into the "AI" business)
Google is essentially paying Mozilla Corp for being their court jester, to keep them utterly dependent and to inflate Mozilla's image as a serious "competitor", which it has ceased to be, a long time ago.
Losing the Google "annuities" would sink the rotten Mozilla Corp, including its opportunistic leadership. IMO that's the only way how something like a decent open-source browser might emerge again, a tool that isn't steered by a group of people pretending to be into privacy, but actually concerned mostly about Google money.