In September, Facebook for users in the European Union after privacy regulators there raised concerns.

A Facebook spokesman said the company was examining the FTC report, but didn't have an immediate comment.

The report recommends best practices for companies using or planning to use facial recognition software, the FTC report said. The best practices, where they go beyond existing legal requirements, are not intended to "serve as a template" for future FTC enforcement actions, the report said.

"If companies consider the issues of privacy by design, meaningful choice, and transparency at this early stage, it will help ensure that this industry develops in a way that encourages companies to offer innovative new benefits to consumers and respect their privacy interests," the report said.

The commission voted 4-1 to release the report, with Republican Commissioner . The report "goes too far, too soon," he wrote.