+ //let channel = Services.io.newChannel("chrome://mandelbrot/content/mandelbrot-tab.xul",
+ // null, null);
+ let ios = Components.classes["@mozilla.org/network/io-service;1"]
+ .getService(Components.interfaces.nsIIOService);
+ let channel = ios.newChannel("chrome://mandelbrot/content/mandelbrot-tab.xul",
+ null, null);