Show me the adverts that GNOME or the KDE project pushes. How do I block ads in my Linux kernel? Where are the ffmpeg adverts? What about the curl ads? Where do you go about finding adverts in LibreOffice? I’ve never seen any ads in nginx, but maybe I’ve missed them.

There’s so much free software out there.

Mozilla gets money, they can also apply for funding if things get that tight. Given that they’re pouring money into useless projects no one has ever asked for, that’s widely unpopular and has lost them a tonne of goodwill among their userbase, I don’t think money is a massive problem for them.