Facebook is planning to start using app and website information from users’ browsing habits to target them with more relevant ads. The change will allow advertisers to glean more information on Facebook users to the extent where browsing websites for a new TV may lead to TV deals being displayed within Facebook. It’s an interest-based form of advertising that’s used widely on the web, but Facebook has previously only ever used the tracking data for security reasons. Today’s changes, which roll out to US Facebook users soon, mean consumers will need to opt-out with the Digital Advertising Alliance to prevent their browsing habits being shared with Facebook advertisers.