Mozilla's CEO has confirmed that the smartphones running on the open-source Firefoc OS operating system will be landing in Brazil, Colombia, Hungary, Mexico, Montenegro, Poland, Serbia, Spain, and Venezuela this summer. During the D: Dive into Mobile conference, held in New York on Monday and hosted by tech site All Things D, Gary Knowles, the head of the organization , said that he hoped the phones will have launched in 16 countries in total by the end of the year, and that to begin with, Mozilla's focus would be on emerging markets. However, the handsets won't be arriving on US shores until 2014.

The Firefox OS supports HTML5, meaning that phones running it will be able to run browser-based apps or download applications directly from websites.

Mozilla debuted the first FireFox OS phones at this year's Mobile World Congress in February and revealed that five handset makers including heavyweights Sony and LG were committed to building phones that run the operating system.