To escape from the big corporations of the USA, as a user we have two options, either to use OpenSource alternatives, although not all of them they are free of influences from Google, MS, etc., or using products and services of European companies, which in general are rather more aimed at protect privacy (GDPR), although only a few are known to most. This is why I thought of using this thread to complete a list of the better European alternatives, starting with the link I put opening this thread.
Vivaldi is from Island. Opera from Norway.
Isn't Opera mostly owned by Chinese investors now? Stick with Vivaldi, that's where all the Opera devs went.
just use hardened firefox
No, Vivaldi has an office Iceland and also its servers are there, but the headquarter is in Oslo. Opera has an office in Norway (like MS has a office in Germany, but certainly isn't a German company), but it was adquired by an Chinese Investment Company, it's not a EU browser. It was in the past, until the company was sold to China. https://vivaldi.com/company/