Porn And Stuff Blocker is a porn blocker extension for Safari. It is as simple as can be with no configuration - it just blocks porn sites. After it starts, a plain white window will come up and tell you that you are ready to start browsing. You can add URLs to the blacklist or close out that window and should never have to rerun the app unless you uninstall and reinstall Safari or OS X or you upgrade the app.
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