This is my personal opinion only, so take it with a grain of salt. ---- Mozilla can't save Firefox. It's not that Firefox can't be saved, but rather that Mozilla as an organization is not capable of doing so. My take is this - Despite a history of being relatively privacy friendly, the vast majority of funding for the organization comes directly from Google (To the tune of ~90% of their total funding, straight from G…
>Mozilla needs a replacement funding plan because Google can essentially turn the lights off at any point by simply refusing to pay them for search at next contract renewal. And then Bing/Yandex/Baidu buys the rights, and all that changes is the amount they get. It'd drop if Google publicly vowed they won't bid on it anymore, but there's also the possibility that someone like Yahoo pays more than Google like what hap…
Further, the kind of transition where Firefox might gain users from Chrome isn't instantaneous, and it turns out users have a preference here (most users don't want to have google removed from Firefox - they still prefer it. Mozilla is quietly testing a program to use Bing as the default, just to see how loud the feedback is: https://www.pcgamer.com/firefox-is-conducting-a-study-to-see...)
So there's a tension here that's beyond just enterprise deals.
Last - that deal didn't actually work out very well for Yahoo, and that was when Firefox had nearly 15% of the browser market (vs ~8% today).