Michael Kohler (@KohlerSolutions) Mozillian since 2008 give an introduction about Firefox OS.
Firefox OS has gained quite a lot attention since its first launch in Spain in July 2013. Since October 2013 it's available in Germany. Most of the devices are available in South America and a few European countries. Even though it's not available in Switzerland through a carrier, you can get it on the Internet.
* Open Web Apps (Manifest)
* Web APIs