WASHINGTON—Lawmakers grilled Facebook Inc. Chief Executive Mark Zuckerberg on Tuesday over the company’s handling of user privacy while also signaling they were prepared to embark on a new era of regulation for big tech companies.
During several hours of intense questioning, Mr. Zuckerberg sought to manage the discontent through a combination of contrition for missteps and calm explanations to complicated questions. And yet throughout, the 33-year-old billionaire was careful not to commit to any major changes in how the platform...