[oldmanhorton]

Well to start, there's browser history sync through your Google account. I'm not aware what the privacy policy is on that data, but I'd imagine it allows Google to get aggregate views at least at the domain level, if not the page level.

[baroffoos]

Also the fact that signing in to any google website automatically signs you in to the browser now.

[lrem]

https://support.google.com/chrome/answer/185277?co=GENIE.Pla... allows you to disable that.