Mozilla has been showing off bits and pieces of its own mobile operating system aka Boot to Gecko since the start of this year and has also released it to developers in July but, still questions still remain as to how the final version of the OS will look like?

Engadget has got its hands on screenshots [below] of what it claims to be is the complete version of Firefox OS Marketplace. There is not much difference between what you find in Apple’s App Store or Google’s Play Store and Firefox OS Marketplace in terms of the layout and design; but, one thing that does catch the attention is that all the apps visible in the screenshot are ‘free’.

The first carrier that is going to ship Firefox OS based devices is Telefonica, probably next year, and more carriers are expected to follow suite.