We realize sites sometimes communicate useful information with pop-up windows. The Google Popup Blocker can be told to remember these sites so pop-up windows are allowed to launch. This information is stored on your computer in what's known as a "whitelist" (as opposed to a "blacklist"). The Popup Blocker uses the whitelist to turn itself off when you visit sites whose popups you would like to see.

To add a site to your whitelist, visit the site and press the Popup Blocker button. The button text will change to read "Allow site popups," indicating that the Popup Blocker is disabled on the site in question.

If you would like to remove a site from your whitelist, visit that site and click the Popup Blocker button. The button text will change to display the number of ads you've blocked. The changed text indicates that the site has been removed from your whitelist, and the Popup Blocker will resume activity on that site.

Please note that it is not possible to view or manually edit the whitelist. You can only add and remove sites from this list by toggling the Popup Blocker button on and off.

If the Popup Blocker is preventing a new window from opening, you can always let a new window open from a "blocked" site by holding down the Ctrl key while you click on a link.