Meta has reached a settlement in a lawsuit brought by an 18-year-old Mississippi woman over claims that its social media platforms contribute to child addiction. The case, which was scheduled for trial next week in Los Angeles Superior Court, was the fourth of nine bellwether lawsuits filed against major tech companies including Meta, YouTube, TikTok, and Snap. The legal actions allege that the companies’ products, featuring addictive elements such as infinite scroll and algorithmic feeds, cause personal injury comparable to tobacco addiction.

The Mississippi plaintiff, identified by her initials as K.D.B., had previously settled similar claims with YouTube and TikTok, leaving Snap as the only one expected to proceed to trial. Meta owns platforms such as Instagram, Facebook, and WhatsApp, and has faced increasing legal challenges related to harm to children and privacy abuses.

Earlier this year, a landmark verdict in a separate case found Meta and YouTube liable for personal injury, awarding $6 million in damages to a young California woman identified as K.G.M. Two other lawsuits against Meta were dropped. The bellwether cases were selected by a California Superior Court judge from thousands of similar claims and could establish significant legal precedents and large financial penalties for the defendants.

In addition to these lawsuits, Meta has concluded a major $17.1 billion settlement with 47 states, the District of Columbia, and U.S. territories in August, addressing claims over harm caused by its platforms. Texas separately secured a $1 billion settlement from Meta. Financial details of the recent settlement and others, including an agreement with a Kentucky school district in May, have not been disclosed.

Meta has also recently faced a $25 billion judgment from New Mexico related to deceptive privacy practices, along with nearly $1 billion in earlier penalties focused on child safety. The company has signaled its intention to appeal these rulings.

The ongoing litigation has spotlighted internal Meta communications revealing executive awareness of potential harms linked to platform design. Chief Executive Mark Zuckerberg testified in court earlier this year during the K.G.M. trial, marking his first direct involvement in such proceedings.

As part of the settlement with state attorneys general, Meta committed to implementing safety modifications on Instagram and Facebook for underage users, including disabling certain notifications and allowing users to opt out of algorithm-driven content feeds.

The Mississippi plaintiff’s attorney, Emily Jeffcott, expressed satisfaction with the resolution, emphasizing a commitment to protecting children and holding tech companies accountable. Meta issued a statement underscoring that dismissals and settlements are typical in bellwether processes and reaffirmed its dedication to safeguarding young users while continuing to defend itself in court.

Meanwhile, Snap remains set to defend itself in upcoming trials involving plaintiffs K.D.B. and S.J., a 16-year-old from Illinois. Snap’s CEO, Evan Spiegel, is expected to testify in court for the first time in relation to these claims.