Mozilla just released its financial report for 2014, showing a small revenue increase. VentureBeat reports that 90 percent of that revenue came from Google and Yahoo.
For years, Mozilla has made a lot of their money from a sponsorship agreement with Google. Mozilla made Google Firefox’s default search engine and Google paid them for it. Last year that deal came to an end and a new five-year deal with Yahoo took over. Basically, it works like this: You type in a search, and then Google or Yahoo makes some money off AdSense ads. Then some of that money would come to Mozilla as part of a revenue-sharing deal.
In the report (PDF), the numbers for 2014 breaks down like this. Mozilla Foundation and its subsidiaries made $311 million in revenue in 2012 and $314 million in 2013. In 2014, the number was $329 million (just less than a 5 percent increase.) Expenses went up by 7.6 percent in 2014 to $318 million.