The company came under intensifying scrutiny by lawmakers and regulators after news reports in March that a political consulting firm, Cambridge Analytica, misused the private information of tens of millions of Facebook users.
In the furor that followed, Facebook’s leaders said that the kind of access exploited by Cambridge in 2014 was cut off by the next year, when Facebook prohibited developers from collecting information from users’ friends. But the company officials did not disclose that Facebook had exempted the makers of cellphones, tablets and other hardware from such restrictions.