Google Chrome scans private files on the computer without mentioning the user and without the possibility do disable this "feature". Google never announced this anywhere.
Someone (Kelly Shortridge, @swagitda_ on Twitter) found this randomly and confronted Google. It answered that this was only an AV scan and wasn't done more than once a week.
Well, THAT'S why I use Firefox. I don't trust Google, and again and again it gives more and more reasons for this mistrust.

Welp, time to uninstall Chrome I guess.

Shoooo Shoooo here comes the bullshit train

If once was so damn crazy about privacy that this would be a problem, they wouldn't use chrome anyway or at least have read the privacy whitepaper that explicitly states “Chrome periodically scans your device to detect potentially unwanted software.”.

The scan is sandboxed and only scans for malware that manipulates chrome itself, to prevent extensions from coming in that you really should worry about, because these will happily steal you CC numbers and go shopping.

If something is found, chrome asks before removing, including a checkbox that asks if details should be send to google

case closed.

@Kimmax The thing is, at least they would have had to talk about it, inform the user. Then, next to the fact that a browser shouldn't browser your private files on its own, why is there no option to disable it?

Not talking about it, not giving any possibility to disable it and doing all of this in a browser is suspicious and sounds wrong. A company like Google shouldn't do something like this.

@Benedikt I have made my poit