rem: var pageid = document.documentElement.currentPage.pageid; if ("onWizardCancel" in this._pages[pageid]) this._pages[pageid].onWizardCancel(); 
add: try {  if (this._updateMoreInfoContent) this._updateMoreInfoContent.stopDownloading(); } catch (ex) { dump("XXX _updateMoreInfoContent.stopDownloading() failed: " + ex + "\n"); } 
context:   onWizardCancel: function() {    var pageid = document.documentElement.currentPage.pageid;    if ("onWizardCancel" in this._pages[pageid])      this._pages[pageid].onWizardCancel();  },
meta: 8395	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/8395/7ec26b5efc083903750dfaebee4b0fbde80a948a/updates.js/clean/toolkit/mozapps/update/content/updates.js