On Tuesday, the social network outlined a number of measures it would be rolling out to comply with a strict new data law in the European Union known as the General Data Protection Regulation (GDPR). You can read all about that here.
One of the features it is introducing in Europe is face recognition. The company says that it can help protect your privacy by allowing it to detect when another person is using your image as their profile picture. It can also recognize other faces and suggest friends you might want to tag in photos or videos.
But Facebook stopped this face recognition feature in Europe in 2012 after concerns from regulators and privacy advocates. At the time, the Irish data protection authority was investigating Facebook's transparency on user data and privacy. Ireland is the home of Facebook's European headquarters.
The Irish Data Protection Commissioner asked Facebook to delete any data that Facebook had garnered at the time through the facial recognition feature. Facebook complied. The regulator also said that the social network would need to "agree a process for collecting consent" with the data protection authority before reintroducing facial recognition.
CNBC is yet to hear back from either Facebook or the Irish Data Protection Commissioner on whether the two spoke about the feature before it was announced.