Facebook rolls out friends-based search product

Facebook has taken the wraps off a new search tool that lets people trawl their network of friends to find everything from restaurants to movie recommendations. 

Mark Zuckerberg, Facebook's 28-year-old founder and chief executive, introduced the new product at the company's first major product launch since a rocky initial public offering in May last year. 

Observers say it's an improvement that's likely to increase competition with review websites like Yelp and potentially even Google. 

The so-called graph search marks the company's biggest foray into online search to date, though it displays only information within the walls of the social network rather than links to sites available across the Internet.