Interface which plugin elements (e.g. embed and object) implement (but don't automatically expose to JS) in addition to their dom specific interface.
readonly ACString actualType
The actual mime type (the one we got back from the network request) for the plugin element.
[noscript] void setActualType ( ACString actualType )
Non-scriptable setter for the actual mime type (the one we got back from the network request).
Reference documentation is generated from Mozilla's source.