Facebook has admitted providing dozens of tech companies with special access to user data after publicly saying it restricted such access in 2015.

Facebook continued sharing information with 61 hardware and software makers after it said it discontinued the practice in May 2015, the social networking giant acknowledged in 747 pages of documents delivered to Congress late Friday. The documents were in response to hundreds of questions posed to Facebook CEO Mark Zuckerberg by members of Congress in April.

Facebook said it granted a special "one-time" six-month extension to companies that ranged from AOL to package-delivery service United Parcel Service to dating app Hinge so they could come into compliance with the social network's new privacy policy and create their own versions of Facebook for their devices. Data shared without users' knowledge included friends' names, genders and birth dates.