[drchaos]

Not open source per OSI criteria, however they claim the source is available and can be inspected:

https://help.vivaldi.com/article/is-vivaldi-open-source/

[MaxBarraclough]

Interesting.

> This means that for all practical purposes the Vivaldi source code is available for audit.

Acid test: can I build it myself and expect to see identical binaries to what they ship?

[JdeBP]

Actually the acid test in this instance is whether, source in hand, you can prove https://news.ycombinator.com/item?id=17564964 wrong. (-:

[MaxBarraclough]

The ID-generation code should be inspectable, right?

[adrianN]

Can you do that with Firefox? Reproducible builds are pretty hard.

[MaxBarraclough]

Fair point. Of course, to a FOSS purist, it's still not good enough, as mere source-inspectibility isn't enough to qualify as OSI Open Source, or as FSF Free Software.