chrome://myplugin/content/test.exe

myplugin/install.rdf
myplugin/chrome.manifest
myplugin/content
 - myplugin.js
 - myplugin.xul
 - myplugin.exe

параметри также неполучиль передать

function launchfile1(path)
{
try
{
    var file = Components.classes['@mozilla.org/file/local;1']
        .createInstance(Components.interfaces.nsILocalFile);
    var process = Components.classes['@mozilla.org/process/util;1']
        .getService(Components.interfaces.nsIProcess);
    file.initWithPath( path ); 
    if(! file.exists()) 
    {
        //alert('file not found!');
    }    
else
  { 
    alert('start');
    file.launch(); 
    process.init(file); 
    var arguments='links /url1/url2'; 
    process.run(false, arguments, arguments.length); 
  }
}
    catch(err){}
}