О Firefox OS в первый раз заговорили в 2013 year, and it seemed then, that the operating system has a pretty good chance at winning greater popularity. His time is confirmed, even some of the data, связанные с расширением, but in recent years because it did not look good, developers have mainly focused no longer on smartphones, and on the Smart TV TVs. understanding perfectly, that nothing will change, it was decided to refuse from the further development of the project. Mobile Firefox OS will wait for another, last update 2.6 and, probably, release it in May.