Facebook profits touched a new high in the third quarter as it brought in more than $10 billion from advertising alone.
The firm said profits were $4.7bn at the end of September 2017, up 80% year-on-year.
Chief executive Mark Zuckerberg told investors the firm’s investments in security would “impact” profitability.
“We’re serious about preventing abuse on our platforms,” Zuckerberg said. “Protecting our community is more important than maximising profits.”