The new mobile design borrows heavily from the way Facebook's Paper app works, with the app automatically sorting posts from the people and pages you follow into different sections or feeds.

While the traditional 'News Feed' remains, it is supplemented with secondary feeds like 'Style', 'Travel', and 'Headlines'.

In addition to the new feeds, Facebook is also testing wider rollout of the 'Marketplace' feature that it's been working on for a few months now. Known simply as 'Shopping', this feature was tested in October, but was buried behind the main section of the app.

However, only a small number of users in the US will be able to see the new Marketplace. "The experience will continue to evolve as we learn more about what's useful for people and effective for businesses," the Facebook  spokesperson said.

"We're still in the early stages of testing and will continue to update the experience as we learn more about what works best," he added.

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