add:  this.lastSeconds = Infinity; 
context: function DownloadProgressListener() {  var sb = document.getElementById("downloadStrings");  this._statusFormat = sb.getString("statusFormat2");  this._transferSameUnits = sb.getString("transferSameUnits");  this._transferDiffUnits = sb.getString("transferDiffUnits");  this._transferNoTotal = sb.getString("transferNoTotal");  this._timeLeft = sb.getString("timeLeft");  this._timeLessMinute = sb.getString("timeLessMinute");  this._timeUnknown = sb.getString("timeUnknown");  this._units = [sb.getString("bytes"),                 sb.getString("kilobyte"),                 sb.getString("megabyte"),                 sb.getString("gigabyte")];}
meta: 10234	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/10234/fed39c2b838dad96d871c63389cab398dee99140/DownloadProgressListener.js/clean/toolkit/mozapps/downloads/content/DownloadProgressListener.js