rem: this.addDownloads(paramBlock); 
add: var manager = params.GetElementAt(1).QueryInterface(Components.interfaces.nsISupportsInterfacePointer); manager = manager.data.QueryInterface(Components.interfaces.nsIObserver); this.addDownloads(paramBlock, manager); 
context:   observe: function (aSubject, aTopic, aData)  {    switch (aTopic) {      case "xpinstall-download-started":        showView("installs");        var params = aSubject.QueryInterface(Components.interfaces.nsISupportsArray);        var paramBlock = params.GetElementAt(0).QueryInterface(Components.interfaces.nsISupportsInterfacePointer);        paramBlock = paramBlock.data.QueryInterface(Components.interfaces.nsIDialogParamBlock);        this.addDownloads(paramBlock);        break;    }  },
meta: 8395	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/8395/dda8b3a65f2f56f7f0aed5a3b3adbf99a2ffb743/extensions.js/buggy/toolkit/mozapps/extensions/content/extensions.js