web plugin default resource folder

IE 8.0
your desktop

Google chrome
C:\Documents and Settings\Administrator\Local Settings\Application Data\Google\Chrome\Application\8.0.552.215

Mozilla  Firefox
C:\Program Files\Mozilla Firefox

The windows program named c:\windows\regsvr32.exe is used to register and unregister ActiveX DLL's and OCX's. (An OCX file is merely a renamed DLL file.) You RUN regsvr32 as follows:

                 Register:  regsvr32 dllFileName.dll
               UnRegister:  regsvr32 /u dllFileName.dll

"plugins": [
    { "path": "your_npapi_plugin.dll" }    
  ],

<script>
var plugin = document.getElementById("MyNPAPIPluginId");
...</script>
 

http://stackoverflow.com/questions/9392536/developing-chrome-extensions-

using-npapi-in-c

http://www.firebreath.org/display/documentation/Deploying+and+updating

+your+plugin