
Facebook’s C.E.O. Mark Zuckerberg rings the Nasdaq’s opening bell from Facebook’s headquarters in Menlo Park, Calif., on May 18, 2012, the day of the company’s initial public offering, while Sheryl Sandberg, Facebook’s C.O.O., looks on.

Facebook’s C.E.O. Mark Zuckerberg rings the Nasdaq’s opening bell from Facebook’s headquarters in Menlo Park, Calif., on May 18, 2012, the day of the company’s initial public offering, while Sheryl Sandberg, Facebook’s C.O.O., looks on.

The chief executives of Meta, Snap, Discord, X and TikTok testified on Wednesday in a Senate hearing about online child safety. Lawmakers have at least six bills waiting in the wings about the issue.