rem: navToolbox.parentNode.removeChild(printPreviewTB); 
add: getNavToolbox().parentNode.removeChild(printPreviewTB); 
context:   exitPrintPreview: function (aWindow)  {    window.removeEventListener("keypress", this.onKeyPressPP, true);    // restore the old close handler    document.documentElement.setAttribute("onclose", this._closeHandlerPP);    this._closeHandlerPP = null;    var webBrowserPrint = this.getWebBrowserPrint(aWindow);    webBrowserPrint.exitPrintPreview();     // remove the print preview toolbar    var navToolbox = getNavToolbox();    var printPreviewTB = document.getElementById("print-preview-toolbar");    navToolbox.parentNode.removeChild(printPreviewTB);    var contentWindow = aWindow || window.content;    contentWindow.focus();    // on Exit PP Call back    if (this._onExitPP) {      this._onExitPP();      this._onExitPP = null;    }  },
meta: 10234	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/10234/eb8fa5e63a39aa5089b5af0bc980b4bf8c32f77d/printUtils.js/buggy/toolkit/components/printing/content/printUtils.js