var retVal = false;
 // Don't show the tooltip if the tooltip node is a document or disconnected.

   return retVal;

After expanding a text area, when scrolling the text area, the browser hangs. After a while there is a pop-up message stating "A script on this page may be busy, or it may have stopped responding. You can stop the script now, or you can continue to see if the scrip will complete." The Error Console indicates that the issus is in chrome://browser/content/browser.js, line 6591. This is the second line of code in the JavaScript function FillInHTMLTooltip(tipElement). function FillInHTMLTooltip(tipElement) { var retVal = false; // Don't show the tooltip if the tooltip node is a document or disconnected. ''' if (!tipElement.ownerDocument || ''' (tipElement.ownerDocument.compareDocumentPosition(tipElement) & document.DOCUMENT_POSITION_DISCONNECTED)) return retVal;