Chromium is the open-source web browser project from which Google Chrome draws its source code. The browsers share the majority of code and features, though there are some minor differences in features and they have different licensing.The Chromium Project takes its name from the element chromium, the metal from which chrome plating is made. Opera began to base its web browser on Chromium with version 15. 2  Sleipnir is a Chromium derivative browser for Windows and OS X. 3  One of its main features is linking to Web apps (Facebook, Twitter, Dropbox, etc.) and smartphone apps (Google Map, etc.).