Software vendor Mozilla on Sunday previewed the first commercial build of its Firefox operating system, which is said to be built around apps written using HTML5.

Mozilla also announced several smartphone release plans, claiming that the new operating system is a better alternative for low-end smartphones in developing countries.

The software vendor said that Alcatel One Touch, ZTE and LG Electronics would start selling new OS-based, Qualcomm processor-equipped smartphones sometime in summer this year. ZTE is all set to unveil its first phone in Barcelona today, Monday.

Huawei Technologies is also said to be developing products that will run on Mozilla's Firefox OS.

According to Mozilla's claims, 18 operators, including China Unicom, Sprint, Telecom Italia, TelefA3nica, Telenor, Deutsche Telekom, and Japan's KDDI, are already in line to offer Firefox OS-based devices later this year.

The Firefox OS-phones will first become available in Brazil, Colombia, Mexico, Hungary, Poland, Montenegro, Venezuela, Serbia and Spain.

More phone manufacturers and more markets will be added to the list soon after. However, the U. S. will reportedly have to wait at least until 2014.