This is done through the google-chrome-stable package because no additional involvement of the system administrator is required while updating this package in future.

The Linux Package Signing Key within an apt key ring gives Google a path to install anything virtually into the user's OS.

You need the root access to install Google Chrome from a RPM or DEB package. In Linux, a Google Chrome web browser is included as a pre-compiled RPM or DEB package. But, the binaries which Chrome is distributed with come under a restrictive BSD license. The source code of Google Chrome is free software. So let’s check out how you can easily install Chrome browser from a Linux terminal. Installing Chrome on Linux has a little twist as it’s not an open-source browser. If you still want to install the Google Chrome browser on Linux, this article is for you. Hence, Debian comes with a pre-loaded Chromium browser, and not a Chrome. However, it is not an open-source web browser. Google Chrome is fast and secure as well. Google Chrome is a widely used web browser in the world.

How to open google chrome download page