Some popups may be really required, eg. if you have to accept any licence agreements.
If you trust these pages to open useful popup windows for you, you can enter the website here.
Click "Add" or "Remove" to edit the entries.
Note: You can also use wildcards like "*" for the URLs of the websites you trust. For example, *.ashampoo.* would mean that popups on http://tech.ashampoo.com would be allowed as well as on www.ashampoo.biz while popups on www.ashampoo2.com would be blocked.