Once you've clicked, type or paste the URL (uniform resource locator) of the website where you want to allow or disallow pop-ups. Under Customized behaviors, you can select pop-up settings for specific sites by clicking the button next to the appropriate entry. How to allow or disallow pop-ups on specific websites You can also enter chrome://settings/content/popups in the Chrome address bar to open the Pop-ups and redirects settings page.
