There are a few ways you can open a new window in Vivaldi, For example, by clicking a button on the Tab Bar, from the File menu, through Quick Commands, etc. One of the more common ways to open a new window, though, is to use Keyboard Shortcuts.

• To open a new window, press Ctrl + N on Windows and Linux, and ⌘ N on macOS.
• To open a new private window, press Ctrl + Shift + N on Windows and Linux, and ⌘ Shift N on macOS.