nsIPluginManager in Firefox 2.0

 Returns the value of a variable associated with the plugin manager.

 (Corresponds to NPN_GetValue.)

 @param variable - the plugin manager variable to get
 @param value - the address of where to store the resulting value
 @result - NS_OK if this operation was successful

 Fetches a URL.

 (Corresponds to NPN_GetURL and NPN_GetURLNotify.)

 @param pluginInst - the plugin making the request. If NULL, the URL
   is fetched in the background.
 @param url - the URL to fetch
 @param target - the target window into which to load the URL, or NULL if
   the data should be returned to the plugin via streamListener.
 @param streamListener - a stream listener to be used to return data to
   the plugin. May be NULL if target is not NULL.
 @param altHost - an IP-address string that will be used instead of the 
   host specified in the URL. This is used to prevent DNS-spoofing 
   attacks. Can be defaulted to NULL meaning use the host in the URL.
 @param referrer - the referring URL (may be NULL)
 @param forceJSEnabled - forces JavaScript to be enabled for 'javascript:'
   URLs, even if the user currently has JavaScript disabled (usually 
   specify PR_FALSE) 
 @result - NS_OK if this operation was successful


 Posts to a URL with post data and/or post headers.

 (Corresponds to NPN_PostURL and NPN_PostURLNotify.)

 @param pluginInst - the plugin making the request. If NULL, the URL
   is fetched in the background.
 @param url - the URL to fetch
 @param postDataLength - the length of postData (if non-NULL)
 @param postData - the data to POST. NULL specifies that there is not post
   data
 @param isFile - whether the postData specifies the name of a file to 
   post instead of data. The file will be deleted afterwards.
 @param target - the target window into which to load the URL, or NULL if
   the data should be returned to the plugin via streamListener.
 @param streamListener - a stream listener to be used to return data to
   the plugin. May be NULL if target is not NULL.
 @param altHost - an IP-address string that will be used instead of the 
   host specified in the URL. This is used to prevent DNS-spoofing 
   attacks. Can be defaulted to NULL meaning use the host in the URL.
 @param referrer - the referring URL (may be NULL)
 @param forceJSEnabled - forces JavaScript to be enabled for 'javascript:'
   URLs, even if the user currently has JavaScript disabled (usually 
   specify PR_FALSE) 
 @param postHeadersLength - the length of postHeaders (if non-NULL)
 @param postHeaders - the headers to POST. Must be in the form of
 "HeaderName: HeaderValue
".  Each header, including the last,
 must be followed by "
".  NULL specifies that there are no
 post headers
 @result - NS_OK if this operation was successful


 Persistently register a plugin with the plugin
 manager. aMimeTypes, aMimeDescriptions, and aFileExtensions are
 parallel arrays that contain information about the MIME types
 that the plugin supports.

 @param aCID - the plugin's CID
 @param aPluginName - the plugin's name
 @param aDescription - a description of the plugin
 @param aMimeTypes - an array of MIME types that the plugin
   is prepared to handle
 @param aMimeDescriptions - an array of descriptions for the
   MIME types that the plugin can handle.
 @param aFileExtensions - an array of file extensions for
   the MIME types that the plugin can handle.
 @param aCount - the number of elements in the aMimeTypes,
   aMimeDescriptions, and aFileExtensions arrays.
 @result - NS_OK if the operation was successful.

 Causes the plugins directory to be searched again for new plugin 
 libraries.

 (Corresponds to NPN_ReloadPlugins.)

 @param reloadPages - indicates whether currently visible pages should 
 also be reloaded

 Unregister a plugin from the plugin manager

 @param aCID the CID of the plugin to unregister.
 @result - NS_OK if the operation was successful.

 Returns the user agent string for the browser. 

 (Corresponds to NPN_UserAgent.)

 @param resultingAgentString - the resulting user agent string