Someone
public javascript v1 · immutable var ioService=Components.classes["@mozilla.org/network/io-service;1"] .getService(Components.interfaces.nsIIOService); var uri = ioService.newFileURI(file); var channel = ioService.newChannelFromURI(uri); var listener = { onDataAvailable: function( aRequest, aContext, aInS, aOffset, aCount ) { alert("Data available!"); } }; channel.asyncOpen(listener, null);