Final approval, scheduled for Dec. 19, could be in jeopardy.

Judge William Alsup warned Facebook he would authorize a “bone-crushing” discovery process on behalf of affected users.

It's one of the largest data breach settlements in U.S. history, and it's the latest in a series of legal consequences related to security issues at Yahoo.

The plaintiffs say they would have chosen a different email provider had they been aware of Yahoo's risks.