Vivaldi 2.4 comes with no less than 42 bug fixes, as well as 9 new features. The most important changes are the ability to remove buttons from the Navigation Toolbar and move them between the Navigation and Status bars, as well as the introduction of multiple user profiles — each with a separate set of Bookmarks, Extensions, history, and so on.
https://www.notebookcheck.net/Vivaldi-2-4-comes-with-customizable-toolbars-multiple-user-profiles-and-more.415192.0.html