Google secretly logs users into Chrome whenever they log into a Google site

Google has made an important change to the way the Chrome browser works, a move the company did not advertise to its users in any way, and which has serious privacy repercussions.

According to several reports [ 1, 2, 3], starting with Chrome 69, whenever a Chrome user would access a Google-owned site, the browser would take that user's Google identity and log the user into the Chrome in-browser account system --also known as Sync.

This system, Sync, allows users to log in with their Google accounts inside Chrome and optionally upload and synchronize local browser data (history, passwords, bookmarks, and other) to Google's servers.