Google's Chrome browser is introducing a feature called Related Website Sets, which allows websites owned by the same organization to share cookies and other data, potentially undermining user privacy. Researchers conducted a study and found that users are unable to accurately determine which websites are related, making it difficult for them to make informed decisions about their privacy. The feature has been criticized for prioritizing advertiser interests over user privacy. Other browsers, such as Brave, Firefox, and Safari, have rejected the feature due to its potential privacy risks.