

Vivaldi is the spiritual successor to the version of Opera that ran on the Presto engine, including some of the key people from back then. It has always run on Chromium with all of the baggage that comes with that. Manifest 3 and difficulty blicking autoplay videos without an extension for example.
It is possible that OP needs Chromium for some reason like sites restricting access to other browsers either intentionally, or due to incompetence. I’ve personally never been able to get any Firefox derivative to have anywhere close to as good of a user experience as out of the box Vivaldi despite my trying, though I can’t speak to Brave’s UX.
I might have to give Waterfox a try, though. Is there any word on how up to date they are with security updates, since derivative browsers tend to lack the resources to not lag behind?
This was a vote to table. A no vote is a vote for impeachment, or at least continue the process toward it.