In Episode 3 of Yet Another Tech Podcast I take a look at some of the projects that Mozilla had endeavored to see through in the past and why they failed or got handed over to the community. Firefox OS of course is the the big project and eventually I'll tackle that by itself but for now, here's a good overview of some of the things that didn't make it past the chopping block.
Sources:
https://developer.mozilla.org/en-US/docs/Mozilla/Firefox_OS_for_TV https://support.mozilla.org/en-US/kb/what-is-persona-and-how-does-it-work https://en.wikipedia.org/wiki/Mozilla_Persona https://medium.com/@bfrancis/the-story-of-firefox-os-cb5bf796e8fb https://www.seamonkey-project.org/about https://en.wikipedia.org/wiki/History_of_Mozilla_Application_Suite
Credit for Intro: Don't Be Afraid by Hybrid Infradead - https://soundcloud.com/hybrid-infradead/dont-be-afraid