It looks like the promising Firefox OS phone alternative just died.

Firefox OS was publicly demonstrated in February 2012, on Android-compatible smartphones. By December 16, 2014, Firefox OS phones were offered from 14 operators in 28 countries throughout the world.

On December 8, 2015, Mozilla announced that it would stop sales of Firefox OS smartphones through carriers. Mozilla later announced that Firefox OS smartphones would be discontinued by May 2016, as the development of “Firefox OS for smartphones” would cease after the release of version 2.6.