The European Union has levied a record $4.2 billion fine against Google for tracking user activity during Chrome's Incognito browsing mode, violating GDPR privacy protections.

The Violation

EU investigators found that Google collected browsing data, search queries, and location information from Incognito mode users through embedded analytics on third-party websites. This data was used for ad targeting despite users' explicit choice to browse privately.

Google has pledged to appeal but must implement changes within 90 days. The ruling could force fundamental changes to how browsers handle private browsing worldwide.