Firefox has slipped from an all time high of 20% market share down to a measly 4%, and half a percent on mobile which has far more users than desktop.
At some point I started jokingly saying that Mozilla exists solely so that Google can pretend it has competition. Now I say this with all seriousness.
I think we need to start thinking about what a post-Mozilla world looks like. Can Firefox keep up without a Google-funded corporation behind it?