How do you force Safari to open new windows in tabs?

To force Safari to open new Windows in tabs, go to Safari's preferences by clicking on "Safari" in the menu bar and selecting "Preferences." Then, navigate to the "Tabs" section and choose the option "Open pages in tabs instead of Windows." You can select from options like "Automatically" or "Always," depending on your preference. This will ensure that new Windows open as tabs in the same window.