Multiple content blockers is a bit of a mess. I think the first one to reject a specific resource simply wins. There is no overriding. There is also no UI to

Multiple content blockers is a bit of a mess. I think the first one to reject a specific resource simply wins. There is no overriding. There is also no UI to manage multiple blockers. For example it is not possible to add a site to a global whitelist. All blockers have to provide their own UI. Hopefully this will improve with iOS 10