NPAPI Plugin

http://mqjing.blogspot.com/2008/09/plugin-firefox-plugin.html
http://docs.rinet.ru/Plugi/
http://docs.rinet.ru/Plugi/ch8.htm
http://devedge-temp.mozilla.org/library/manuals/2002/plugin/1.0/initdestruct.html
https://developer.mozilla.org/en/Gecko_Plugin_API_Reference/Scripting_plugins
https://developer.mozilla.org/en/Gecko_Plugin_API_Reference
https://developer.mozilla.org/en/Gecko_Plugin_API_Reference/Plug-in_Side_Plug-in_API
https://developer.mozilla.org/en/Gecko_Plugin_API_Reference

The plug-in APIs, which are called from Netscape.

API Name	Description
NPP_Destroy	Deletes an instance of a plug-in.
NPP_DestroyStream	Called when a data stream is complete.
NPP_GetJavaClass	Returns the plug-in associated Java class.
NPP_HandleEvent	Macintosh-only event handler.
NPP_Initialize	Global initialization.
NPP_New	Creates a new instance of a plug-in.
NPP_NewStream	Called when a new stream has been created.
NPP_Print	Print handler.
NPP_SetWindow	Called during plug-ins window activity.
NPP_Shutdown	Global termination.
NPP_StreamAsFile	Gives the filename for the stream.
NPP_URLNotify	Notifies the completion of a URL request.
NPP_Write	Called to write data to a plug-in.
NPP_WriteReady	Determines whether a plug-in is ready for data.

The Netscape APIs, which are called from the plug-in.

API Name	Description
NPN_DestroyStream	Terminates a data stream.
NPN_GetJavaEnv	Returns the Java execution environment.
NPN_GetJavaPeer	Returns the plug-in associated Java object.
NPN_GetURL	Requests that a new stream be created.
NPN_GetURLNotify	Requests that a new stream be created with notification.
NPN_MemAlloc	Allocated memory.
NPN_MemFlush	Macintosh-only flush memory.
NPN_MemFree	Frees memory.
NPN_NewStream	Creates a new stream of data.
NPN_PostURL	Posts data to a URL.
NPN_PostURLNotify	Posts data to a URL and notifies of result.
NPN_RequestRead	Requests bytes from a stream.
NPN_Status	Displays a status message.
NPN_UserAgent	Gets Navigator's user agent field.
NPN_Version	Gets the Navigators plug-in version.
NPN_Write	Writes to a stream.