Meta is set to face a jury trial over allegations brought by 30 US states that it harmed children’s mental health and violated their privacy. Proceedings are due to begin in a California federal court before Judge Yvonne Gonzalez Rogers. The lawsuit alleges that the technology company violated federal and state child-protection laws through its Facebook and Instagram operations.

The plaintiffs are seeking more than $1 trillion in damages and major changes to how Facebook and Instagram operate. The states allege that Meta’s algorithms and platform design keep children and teenagers on its apps for long periods and foster addiction. Their proposed changes include ending like counts, disabling infinite scrolling and automatic video playback, and removing filters that create unrealistic images.

Other demands include preventing minors from opening multiple accounts, eliminating features that disappear after a set time such as Instagram Stories, and requiring parental verification for children’s accounts. Meta has denied the allegations, saying it has long worked on safety and support for younger users and will present its position in court. A New Mexico court has already fined Meta $942 million in a child-safety case.