Apple jams Facebook's web-tracking tools

Apple will attempt to frustrate tools used by Facebook to automatically track web users, within the next version of its iOS and Mac operating systems. "We're shutting that down," declared Apple's software chief Craig Federighi, at the firm's developers conference. He added that the web browser Safari would ask owners' permission before allowing the social network to monitor their activity. The move is likely to add to tensions between the two companies. Apple's chief executive Tim Cook had previously described Facebook's practices as being an "invasion of privacy" - an opinion Facebook's founder Mark Zuckerberg subsequently denounced as being "glib".