This is a good time to remind everyone that Google has planted a hard-coded "X-Client-Data" telemetry backdoor that is sent to DoubleClick domains, is never disclosed to users and is impossible to disable.
The header, which is not available to any of their competitors, contains unique information about the install that could allow them to track people better than anyone.
The header, which is not available to any of their competitors, contains unique information about the install that could allow them to track people better than anyone.