Block Popups

iOS / iPadOS

1. Open Settings app / Safari
2. Scroll to 'Block Pop-ups' and enable it

macOS

1. Open Safari
2. In top menu bar, select Safari / Preferences
3. Select 'Websites' tab
4. Select 'Pop-up Windows' in the left section
5. Change 'When visiting other websites' to 'Block and Notify'