Facebook has said its users will now have more control over the ways the site uses facial recognition to analyse their photos.In a press release, the company's artificial intelligence research lead Srinivas Narayanan detailed a new expanded setting in which users have the capability to toggling face recognition on or off “People who still have the tag suggestions setting will begin to see a notice in their News Feed today. The notice will include information about the new features and options to learn more about how we use face recognition, along with a button to turn it on or keep it off.”If you do not currently have the face recognition setting and do nothing, we will not use face recognition to recognize you or suggest tags.”The social media firm has has used the technology since 2010 to match known faces in user profile pictures and other photos to unknown faces in newly uploaded photos.