[Phenix88be]

Open source is NOT free software. You are not free because you are using Chromium instead of Chrome. Free software is a philosophy, Open source just mean every one can read the source.

You can contribute to Open Source and be evil...

[majewsky]

Well technically, when you can just read the source, it's not called "Open Source", but rather "Shared Source".

[tasn]

I think the term source-available is more commonly used. https://en.wikipedia.org/wiki/Source-available_software

[icebraining]

Chromium is free software, just like the vast majority of open source.

The philosophies are certainly different, but the code produced by one generally fits the other definition as well. MIT, BSD, Apache, WTFPL, etc - all of these licenses fit both the open source and free software definitions.