Microsoft has confirmed that there will be a browser extension system for Project Spartan, allowing developers to extend its functionality with software that can be built directly into the browser. ?Yes. We?re working on a plan for extensions to a future update to 'Project Spartan,' the developer relations team for IE said during a Q&A chat on Twitter Tuesday.

Microsoft is trying to build a developer ecosystem around the browser, allowing functions to be added that are not supported natively.

Google Chrome and Mozilla Firefox have their own systems for adding functionality to those browsers.

The team also added that IE 11 will remain available in Windows 10 and users may choose to enable bit.

Seperately, Microsoft confirmed Tuesday that the Surface 2 is no longer being manufactured.

However, Microsoft executives said last week that the Surface 2 would receive an update that would bring at least some of the features of the upcoming Windows 10 release to the platform.

As you realize, Windows RT is dead in all but name. But Microsoft is reluctant to discard those customers who bought into the Surface and Surface 2 vision, and purchased one of the early tablets.

But Microsoft will continue to support ARM-based phones, phablets and small tablets up to 8 inches devices through Windows 10.

Meanwhile, the success of the Surface Pro 3 has been confirmed by Microsoft, with the company to say on Monday that revenue for the entire Surface line alone exceeded $1 billion for the quarter.