Considering open source?
For a new browser like this, which is amazing by the way, open soucing would be an amazing way to intergrate with the developer community to have a "hackable" browser so us, developers, can send pull requests to make the browser better. This would change how the browser evolves as it would be much faster and bugs could be fixed by third-party devs. What do you, the community, think of this?
It seems those FOSS topics are "growing like mushrooms out of the soil" as we say in my language.
Of course it would be awesome. It depends on what is keeping Vivaldi from becoming free though. Developers choice? Bundled software incompatible with any free license? First we need to know why it's closed source. Then we're able to see which options there might or might not be.