

Propietary because part of it’s unique UI which can’t be used legally by Chrome or EDGE, but by the user to mod it, not OpenSource but source public available. For feature rich Gecko browsers it is way easier to be OpenSource, because there isn’t any big (US) corporations which use these browsers, also for simple Chromium forks whithout much features which are interesting for GOOGLE or M$. I understand that opt in to dirct match, partner ads and search engine are preferable, but at least it’s way more ethical to create incomming for the Vivaldi infrastructure (Mastodon, usermail, userblog, sync server, etc…) than logging and selling user data.


















Not so easy, the Chromium market is brutal, more for an indie browser like Vivaldi. Releasing it’s full code will be, not only the end of Vivaldi, but also the end of other Chromiums. No for nothing, Vivaldi, despite an marginal market share (~2%) is mencioned on level eye with the US global players because it’s features which nobody else has, the only even used as automotive browser in a lot of EU car brands, not even archived by Google.
https://vivaldi.com/blog/technology/why-isnt-vivaldi-browser-open-source/