UP is the result of series experiments conducted by Mozilla with help of volunteers and web publishers which was aimed to generate content, based on user’s interest with the help of browsing history. But, this type of personalisation comes with price, says Mozilla, it may be come with ads or subscription based model, other innovative models, or it might come in the form of user interaction or engagement.
This is still in experimental stage, Mozilla likes to hear you opinion on this proposal in a way that creates a better, more transparent and more valuable Web experience. Make your voice heard at forum.
Source: Mozilla Labs.