> What I'd really wish for is an EU browser that 'just works'.
Have you tried Zen Browser? It's entirely open source but the core team and sponsor are European, and it's actively positioning itself as the European alternative. I've been giving it a go lately. So far, so good, and I like most of their UI/UX choices.
Not OP, but your comment had me looking into it: the fact that it's Firefox-based is reason enough to give it some consideration: the Chrome monopoly we are currently under is not compatible with a healthy and neutral web.
I've considered Zen, but the problem there is no Widevine, which means no DRM video.
I do love the design and how the interface has vertical and pinned / favorite tabs as its foundation. It's where I expect other browsers to go eventually.