There are other articles that do go into an initiative from Mozilla, Telefónica,...

There are other articles that do go into an initiative from Mozilla, Telefónica, Verizon and other phone companies to make flip and slider phones using a version of the OS with a simpler interface.

http://www.engadget.com/2015/03/01/mozilla-is-bringing-firef...

http://liliputing.com/2015/03/firefox-os-coming-to-low-end-f...