Why shouldn I install Google Browser Sync on computers that other people can access?
Browser Sync keeps all your browsers in sync with each other, so it needs to send potentially sensitive information like your stored passwords, bookmarks, and browser history to the other computers where you’ve installed it. Also, once you install Browser Sync, you don’t need to log in every time you start the browser to access this info. Therefore, someone who uses a computer where you’ve installed browser sync will have access to all the info you’ve chosen to sync across your computers. Any new browser settings they create, such as browsing history, will also show up on your other computers.