To add to what I said, this is also a good read - Vivaldi browser and open-source - https://vivaldi.com/blog/vivaldi-browser-open-source/ https://vivaldi.com/bl

To add to what I said, this is also a good read - Vivaldi browser and open-source - https://vivaldi.com/blog/vivaldi-browser-open-source/ https://vivaldi.com/blog/vivaldi-browser-open-source/ ... (Vivaldi offers a browser that is built on the open source chromium web engine framework. But in their previous avatar, they used to sell a closed source browser called Opera. The post linked to explains why they aren't 100% opensource.)