Mozilla has posted several pictures on its official blog showing what can be expected from its upcoming Firefox OS mobile operating system.

Having officially launched at MWC 2012 earlier this year, few details of the software have emerged since the initial announcement. However, Mozilla, the firm behind the successful Firefox desktop browser, has now released images which show various aspects of the platform’s user interface.

An open-source platform, Firefox OS will be based entirely on HTML5, the new programming language which has recently usurped Adobe’s Flash as the main format for online videos on smartphones.

Judging by the images, the OS bears more than a passing resemblance to the later versions of the Symbian platform. The older operating system, which powered many leading Nokia devices, existed for many years in an open-source model itself before being aquired and turned into a proprietary system by the Finnish manufacturer.

As for handsets that will run the new operating system, ZTE recently announced that it is working on a number of such devices with an eye on bringing them to market in the first quarter of 2013.

US newspaper the Wall Street Journal reported that He Shiyou, ZTE’s executive vice president, told journalists at a press event earlier this month that the Chinese firm is working on Firefox OS smartphones, but gave few other details about exactly what his company is planning.