

Wait wait wait. Where does Vivaldi say that in any way?
In the bit I quoted from what was linked. Of course, they don’t phrase it like that, but it’s what they’re doing.
Their user security https://vivaldi.com/privacy/browser/
We strictly protect the security of any and all personal information you provide to us while using Vivaldi products and services. We do not share or sell information to any third party and we proactively protect all user data from disclosure, with the only exception being if requested by legitimate law agencies with a court order.
…which is immediately contradicted lower down the page by most paragraphs in “Type and purpose of data collected by third party vendors”. OK, it’s not personal information, but it is still information that they’re sharing with third parties.
It’s also not clear to me how much notice they give of changes to that policy, either.
That’s privacy not security, though. The basic problem is that we can’t look at all the code, audit it, modify it, test it, check it always behaves well.
No disagreement there, but Vivaldi isn’t repeating anything that’s been tried before. Vivaldi is an employee owned company that wants to succeed, wants to offer the best interface, security and features to the general public it can whilst simultaneously keeping itself uniquely true to its values and survival. Gee, so horrible of it to want to scrape a living for its employee owners. Ridiculousness indeed.
But this has been tried before. I’ve worked in employee-owned software companies for decades and seen many others come and go. Attempting to hold part of your code hostage seems doomed to fail eventually: most go bust, and some get bought out by so-called “carpet-baggers”. To succeed in an ethical way, they need to find a way to get paid to develop the software, not fall into the trap of creating it and then trying to get paid later by keeping part of it secret. I don’t want to be caught in the fallout yet again if another company learns this the hard way and then their software becomes obsolete and lost.
Maybe some places don’t have alternative suppliers than Walmart? Similarly, some places have governments that still only use the porno social network for some services.