case: in my page, I need to download a plugin, I know firefox plugins directory is c:\program files(x86)\mozilla firefox\plugins. But I find a case, this downloaded plugin is located in C:\documents&settings[username]\plugins(I dont know how,maybe the user download the plugin early). And firefox try to load the plugin in wrong directory, but I can't find the plugin in firefox add-ons.
so why do firefox load plugin which is not in its plugins directory? anyone can show me firefox plugin load rule?