Vivaldi is configurable in a way both easy and comprehensive. It has Windows 10-like square corners, but is much more attractive than Windows 10 software. The one thing that's impressed me so far is how darned fast pages load. I haven't tried importing bookmarks yet.
It works bookmarks, history, downloads and other things you can add to a retractable side panel that's really neat. Then, for history, for instance, you can expand into a whole window. The way Vivaldi works history is really amazing, with graphs, top domains visited.....they really remade what a history is supposed to do.