Chrome and Chromium are virtually identical except for Google services, which aren't required to do anything with the browser except for installing Chrome extensions that can alternatively be sideloaded, so this is nitpicking.
Jumping in to defend parent comment, there’s nothing Open Source about Google Chrome and it’s highly relevant in this context because they are notorious for putting technologies and tracking in there that many people find objectionable.
Tangential, but I tried to build chromium the other day but stopped when it said it required access to Google cloud platform to actually build it. If something requires a proprietary build system, does it matter that it's open source?
I think I got my wires crossed with ChromiumOS which when I last read the docs seemed to suggest that Google cloud platform was required. I now can't find those specific docs either so I retract my statement.
Widevine is a Google service so I didn't forget it. You can still play media if you dislike DRM usually, at =< 720p that is, which is a lesser security standard. I'm not even sure whether it involves additional servers.
