Dev:Internet Plug-Ins

Internet Plug-Ins is a directory in /System/Library/ and /Library/ that contains plug-ins for WebKit. As of iOS 6 and 7, the only default plugin there is QuickTime.

Structure of an Internet Plug-In
Internet plug-ins should have an extension of .webplugin. The principal class should be a subclass of UIView and adopts the WebPlugInViewFactory and WebPlugIn protocols:

The Info.plist should contain some keys starting with WebPlugin…. See for detail.