CEO Gary Kovacs told AllThingsD that the first Firefox OS phones will launch in 5 countries this June. The first countries will be Brazil, Poland, Portugal, Spain, and Venezuala.

ZTE plans on launching another phone running Mozilla's Firefox OS, this time with a dual-core processor, a bigger screen, and a revamped user experience, a company executive said on Tuesday.

Spanish smartphone OEM GeeksPhone has sold out its initial stock of Firefox OS developer preview handsets in a matter of hours. The $118 Keon and the $194 Peak went on sale yesterday, but both devices ...

Mozilla has unveiled two Developer Preview smartphones that will act as a vanguard ahead of Firefox OS's consumer release later this year. The phones are being developed by Geeksphone -- a Spanish ...

Mozilla said Monday that it has named its forthcoming HTML5 mobile operating system Firefox OS, gained support for it from more telcos and found two device manufacturers that intend to build ...

Mozilla’s aim of competing with the market leaders was admirable but ultimately Firefox OS didn’t turn out to be a platform capable of rivalling Apple and Google. A lack of apps, limited ...

For the Firefox OS to be successful, app developers would have had to embrace the platform more enthusiastically. Although in theory any HTML5 Web app works on a Firefox OS phone, it’s not that ...

Against those older-generation Android phones, the Firefox OS phone does well. The ZTE Open didn’t seem to lag or slow down with use during my short test.