Poper Blocker is a Chrome extension that not only blocks annoying pop-ups it also blocks pop-unders that pop no matter where you click on a page.
It will block all annoying pop-ups/pop-unders that pop no matter where you click on a page. It requires no configuration.
When either pop-up/pop-under is identified and blocked, a notification appears.
You can view the blocked content by clicking on its link in the notification.
Selecting Allow always will stop the blocking and add it to your whitelist of sites that can show pop-ups/pop-unders. Your whitelist can be managed via the extension's options page. If you're signed-in to Chrome, your settings will be synced across devices.
Your privacy is deeply respected and there's absolutely no data whatsoever sent anywhere. The extension is practically off-line in terms of communications.
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Download from the Chrome Store