about:blank is an application that blocks websites in Safari. You specify the websites that you want to block on your Mac or iOS device, and the rules will be synchronized across all your other devices. The rules are based on regular expressions, which allows for fine control over a blocked URL. For example, you can block the landing page of YouTube and still watch individual videos. Furthermore, you can block websites on the fly inside of Safari.
This application helps you prevent other users from accessing certain webpages.
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