An arbitrator has decided in favor of Meta in a case the company brought against Sarah Wynn-Williams, the former Meta employee who wrote a memoir published this week detailing alleged claims of misconduct at the company. Macmillan Publishers and its imprint that published the memoir, Flatiron Books, were also named as respondents.

Meta Platforms on Wednesday won an emergency arbitration ruling to temporarily stop promotion of the tell-all book "Careless People" by a former employee, according to a copy of the ruling published by the social media company.

An arbitrator has prevented the employee from promoting her book and disparaging the company until private arbitration concludes.

Sarah Wynn-Williams alleges in her book "Careless People" that she was fired after reporting inappropriate behavior by her boss

Meta has notched an early victory in its attempt to halt a surprise tell-all memoir from a former policy executive turned whistleblower.