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What to know about the legal efforts to rein in the power of large tech companies, and what to look for with this latest antitrust legislation.

No one likes a peeper.

Here’s what Frances Haugen told officials about the inner workings of the social network today.

In a statement, Facebook said that a maintenance error accidentally disconnected their servers from the rest of the internet.

Ray-Ban style, Facebook tech

Products like Instagram, WhatsApp and Messenger have also been affected, and some Facebook employees say they can’t get into their offices.

Action stations.

How to preempt and combat abuse online.

The “polls” and “watch together” feature will also be available on both apps.

“Instagram Kids” has attracted criticism for months. WSJ's recent investigative probe refocused attention on the service.