Unlike at GOOG, MSFT, AAPL, Firefox isn't a loss leader or cost for Mozilla that can be subsidized by other products. Before criticizing their finances, go find an organisation that can afford to even build and maintain a full-fledge cross-platform browser with mobile support for less than that. Browsers are not simple things. You have to create an entire ecosystem of software and development tools to go along with it as well as maintaining full legacy support. Most software of similar complexity are all built by organisations with deep pockets.