Pop-ups, by default, display in a separate window. If you want these pop-ups displayed in tabs, you can do the following:
- Select the Tools menu in Internet Explorer.
- Open Internet Options.
- Switch to the General tab from the Tab section.
- Select Settings.
- When you see the Tabbed Browsing Settings dialog box, select the Always open pop-ups in the new tab.
- Press OK to apply settings.
Read more: How to Block Pop-Up Windows or Ads on HP Computers?