Popups are windows that appear, typically unsolicited, when you activate a web browser. These are typically advertisements or requests to download some software that may contain viruses or programs that could be destructive to your computer.
QUICK GUIDE:
Privacy & Security Preferences - Popup Windows: This section describes how to use the Popup Windows preferences panel. Follow these steps:
- Open the Edit menu and choose Preferences.
- Under the Privacy & Security Preferences category, click Popup Windows. (If no subcategories are visible, double-click Privacy & Security to expand the list.)

- Click the box that says Block unrequested popup windows.

- Click the "Allow Sites" button.

- Select the Remove All button to remove default sites from menu.

- In the form, type in any sites that you would like to allow popups.

- Click Add.
- Click Ok.
- Popups should now only appear from the sites you have allowed when you use Netscape 7.1 for web browsing