A mysterious extension installed on Chromium silently listens in to whatever the user is doing on Chromium according to some reports from the security experts and researchers. Google was already aware of this situation and they confirmed that it was Debian's responsibility and reason that the extension was installed without concern because it is a security problem related to privacy. It might affect the users using the Chromium-based web browsers on Debian and Debian-based OSes. Also, it might seem that Chromium itself is not a Google product but then, Google Chrome itself is pretty much based on Chromium and they still have the hands on that technology. The origin of that doesn't belong to Google however.
The only solution will be to disable the microphone and camera on the computer or use other web browsers on the Debian and Debian-based OSes.