Here's more information about the X-Client-Data header Chrome includes in every HTTP request sent to Google domains: https://9to5google.com/2020/02/06/google-c

Here's more information about the X-Client-Data header Chrome includes in every HTTP request sent to Google domains: https://9to5google.com/2020/02/06/google-chrome-x-client-data-tracking/ https://9to5google.com/2020/02/06/google-chrome-x-client-dat... Your X-Client-Data ID is not reset when you clear your browsing data. You need to launch Chrome with a special command line parameter to reset it.