Why are Google cookies getting sent to third-party website even after completely cleaning my browser?

Question

I just cleared all my browser's data and opened a new Incognito window. I navigated to askubuntu.com and logged in.

Interesting, in one of the first requests cookies are getting sent back to askubuntu that appear to be of the Google Analytics style.

What I am wondering is how can cookies on one domain (Google) get sent to a third party domain (AskUbuntu) ?

Answer 1

I think the answer is in your question: "in one of the first requests cookies are getting sent back" . If it's not the first request, then it's normal to have cookies sent back, since they would have been set earlier by Google Analytics.

What I see is that you have the preserve logs option on, and before the request to askubuntu.com , there are others requests, which tells me this is a subsequent request, not the first one.

Do this:

• Close/Reopen an incognito window
• Uncheck preserve logs
• Go to askubuntu.com

--> Look at the very 1st request to askubuntu.com , there won't be any GA cookies in it.