When I reinstalled Windows 10 recently, I was careful to disable all the options for Cortana. I removed it from the taskbar then when into the settings and disabled every permission I could find. I'm using an offline account and I've never logged into Cortana, Office, Skype or any other product with a Microsoft account.
However, I just received a Windows notification that seems to have been triggered by the system reading my web browser. I had just opened up Gmail in Chrome and one of my new emails was a shipment confirmation from Amazon. The Windows notification (within seconds) suggested that I use Cortana to track packages.
Am I missing something or is this an obvious case of software reading my personal information despite being configured to leave me alone?