Mozilla has been open source since day one. Mozilla's engine at one point was the go to for a cross platform embedable browser but things changed: https://grou

Mozilla has been open source since day one. Mozilla's engine at one point was the go to for a cross platform embedable browser but things changed: https://groups.google.com/forum/#!topic/mozilla.dev.embedding/c_NMcO-N8wo/discussion https://groups.google.com/forum/#!topic/mozilla.dev.embeddin... Edit: Should clarify, Mozilla as an entity that releases web browsers, not "Mozilla" as in the Netscape days.