LinkedIn is scanning browser extensions without user consent, collecting data on over 6,278 extensions, and using this information to build detailed profiles of its users. This practice, which has been ongoing since at least 2017, is not disclosed in LinkedIn's privacy policy. The data collected can be used to infer personal information, such as job searching or political affiliations, and can also be used to track users across the web. This has sparked concerns about user privacy and the potential for abuse.