SACRAMENTO, Calif. — Google, Meta and TikTok have sued to block California’s new restrictions on social-media features for children younger than 16, opening another legal fight over online safety and speech.

Reuters reported Thursday that the companies challenge Assembly Bill 1709’s restrictions on personalized recommendations and autoplay. They argue that the measure infringes their First Amendment rights and conflicts with federal protections for online platforms.

Gov. Gavin Newsom signed the measure September 10 as part of a package of child-safety laws addressing social media, companion chatbots, civil penalties and age-verification signals.

The state’s announced objective is to reduce harm to children online. The lawsuits ask courts to decide whether the restrictions can lawfully accomplish that goal. Filing a challenge does not itself mean a court has blocked enforcement.