Please help me out here. I never understood why people always argue that Chromium is open source. Sure, Chromium is, but not Google Chrome. From what I understa

Please help me out here. I never understood why people always argue that Chromium is open source. Sure, Chromium is, but not Google Chrome. From what I understand, the changes for Chrome from the Chromium source are not obvious. It is not by accident, that it takes me 10 secs to find a Google Chrome download, but to find a Chromium download ready for install on all platforms? I doubt that Average Joe will either understand the difference, and/or find a Chromium download.