Last month, Mozilla officially unveiled its forthcoming standalone operating system which will run on smartphones and be known as the Firefox OS.

Now we have some early evidence of what the software will look like on our screens, as a Technical Evangelist for Mozilla has released a series of screenshots via his Twitter account.

Robert Nyman couldn’t keep the Firefox OS developments to himself, and posted six images – the most intriguing you can below. The remaining trio can be seen here.

Nyman was keen to stress that “it’s a work in progress and changes all the time”, but if these are examples of the product in an unfinished and unrefined state, then the OS seems to be shaping up nicely.

Firefox OS-powered devices will run a Qualcomm Snapdragon processor and are expected to launch in Brazil early next year, via the Vivo service of mobile carrier giant Telefónica.

Mozilla says its HTML 5-based platform, "unlocks many of the current limitations of web development on mobile, allowing HTML 5 applications to access the underlying capabilities of a phone, previously only available to native applications.”

This will allow for "the removal of unnecessary middleware layers," and help drive down the cost of the phones, Mozilla said.

But what are the platform's chances of succeeding and breaking the dominance of iOS, Android and Windows Phone? Let this analysis help make up your mind.