Facebook has tried to prevent yet another privacy row engulfing the social network by admitting it "should have been more clear" about the roll-out of its facial recognition technology.

The company also posted an updated blog post explaining that its Tag Suggestions function had been switched on by default for the majority of its users.

"We should have been more clear with people during the roll-out process when this became available to them. Tag Suggestions are now available in most countries and we'll post further updates to our blog over time."