The Mozilla Foundation is the nonprofit organization that demonstrated FOSS could compete in consumer software markets — and that a foundation governance model could sustain large-scale product development.
Mozilla originated as Netscape's open source browser project following the netscape-source-release-1998 in 1998. AOL acquired Netscape in 1999 and maintained the Mozilla project for several years; when AOL wound down its involvement, it transferred the project and $2 million in funding to the newly created Mozilla Foundation in July 2003. mitchell-baker served as president.
The Mozilla Corporation, a taxable subsidiary of the Foundation, was launched in 2005 to handle commercial activities — primarily Firefox browser development and the search partnership revenue (primarily from Google) that funded operations. Baker served as Mozilla Corporation CEO. This structure — nonprofit foundation owning a commercial subsidiary — was designed to allow commercial revenue generation while maintaining mission alignment and nonprofit governance.
Firefox launched in November 2004 and grew rapidly, breaking Internet Explorer's effective browser monopoly: Firefox's market share peaked around 30% in 2009-2010 (approximate). This was the FOSS movement's most visible consumer-facing success — demonstrating that a volunteer-rooted project could build software that hundreds of millions of users preferred over a dominant commercial product.
The Mozilla Public License (MPL), drafted by mitchell-baker during the Netscape era, is a "file-level copyleft" license — copyleft applies within files but not across the project — designed as a corporate-usable middle ground between gpl-v2 and permissive licenses. It is OSI-certified and has influenced subsequent hybrid licensing approaches.
Mozilla's trajectory in the modern-foss-and-sustainability-crisis-2015-present era has been troubled: Firefox lost market share to Google Chrome after 2011, the Google search deal became both the Foundation's primary revenue source and a source of mission tension, and repeated strategic pivots (to mobile, to privacy products, to AI) have not recovered lost ground. Baker's departure as CEO in February 2024, accompanied by layoffs, left the organization's future uncertain — a test case for whether a FOSS product organization can sustain itself when its primary revenue source is a strategic competitor.