Content blocking is a new system level feature in iOS 9. Content blockers works directly with the Safari browser, but need to be enabled before they can be used.
When a content blocker is working, Safari will not load the site. You will see a blank page in the Safari browser.In the example, we are using the blacklist to block websites with the term "cats" in the site name. In the top screenshot, the search term "cats" shows images and sites of cats from a standard web search. Once the term "cats" is added to the block list, Safari only page shows a blank screen.
Every family is different and only they can decide what content is appropriate for their household. You can customize Earmuffs to match your family's values through the use of a whitelist and blacklist.
The simplest way to add a site to either the white or black list is through the Earmuffs Safari action extension. Once enabled, you can add sites directly while browsing Safari.