You can't get at how much is spent on development for each product, but you do get some information: (below all 2018 figures) They took in ~$430M from, primari

You can't get at how much is spent on development for each product, but you do get some information: (below all 2018 figures) They took in ~$430M from, primarily, the search deals, plus a couple million each from some other sources like subscriptions is in there as income too. They spent ~$280M on software development, $52M on marketing, $86M on administration and "general." With 1,000 (okay, 750) employees you're going to have some administrative costs. So it's mostly going to software development writ large, though you don't have reported the breakout of what's being spent on what projects. As for the charitable stuff: the foundation took in $13M in contributions, and also about $13M from the corporation paying the foundation for the use of the trademarks (the foundation owns them). The foundation spent $18M on its charitable programs. Presumably this $18M is part of the $33M total consolidated spending on "other program services." There's truth in the statement that a portion of Firefox's revenue is paying for some of Mozilla's charitable programs, but it's a very small amount relative to the amounts spent on development.