Xul drag and drop function doesn't work Firefox 17 ESR but works in Firefox 10 ESR

Question

I am having a problem with a xul drag and drop function designed for selenium rc and selenium IDE. It works in Firefox 10 ESR but does not work in Firefox 17 ESR.
the code used for the draganddrop function is added below:
Selenium.prototype.doXulDragAndDropToObject = function(locatorStartElement, locatorEndElement) {
var startElement = this.page().findElement(locatorStartElement);
if (startElement.wrappedJSObject) {
startElement = startElement.wrappedJSObject;
var endElement = this.page().findElement(locatorEndElement);
if (endElement.wrappedJSObject) {
endElement = endElement.wrappedJSObject;
var dropValue;
var startTreerow = getAncestorsByTagName(startElement, 'treerow')[0];
var treeCells = startTreerow.children;
for(var i=0; i<treeCells.length; i++) {
var val = treeCells[i].getAttribute('value');
if(val) {
dropValue = JSON.parse(val);
if(dropValue) {
endElement.drop(dropValue);
The is the error message I received when the draganddrop fails in FireFox 17 ESR:
[error] Unexpected Exception: message -> An attempt was made to use an object that is not, or is no longer, usable, code -> 11, INDEX_SIZE_ERR -> 1, DOMSTRING_SIZE_ERR -> 2, HIERARCHY_REQUEST_ERR -> 3, WRONG_DOCUMENT_ERR -> 4, INVALID_CHARACTER_ERR -> 5, NO_DATA_ALLOWED_ERR -> 6, NO_MODIFICATION_ALLOWED_ERR -> 7, NOT_FOUND_ERR -> 8, NOT_SUPPORTED_ERR -> 9, INUSE_ATTRIBUTE_ERR -> 10, INVALID_STATE_ERR -> 11, SYNTAX_ERR -> 12, INVALID_MODIFICATION_ERR -> 13, NAMESPACE_ERR -> 14, INVALID_ACCESS_ERR -> 15, VALIDATION_ERR -> 16, TYPE_MISMATCH_ERR -> 17, SECURITY_ERR -> 18, NETWORK_ERR -> 19, ABORT_ERR -> 20, URL_MISMATCH_ERR -> 21, QUOTA_EXCEEDED_ERR -> 22, TIMEOUT_ERR -> 23, INVALID_NODE_TYPE_ERR -> 24, DATA_CLONE_ERR -> 25, result -> 2152923147, name -> InvalidStateError, filename -> chrome://selenium-ide/content/selenium-core/scripts/htmlutils.js, lineNumber -> 1183, columnNumber -> 0, location -> JS frame :: chrome://selenium-ide/content/selenium-core/scripts/htmlutils.js :: :: line 1183, inner -> null, data -> null
firefox selenium-rc selenium-ide

Answer 1

hello, your question conatins a few issues...
*if you want to use the regular release version (firefox 18.0.2 at the moment) and not a beta version, then please download the setup file from getfirefox.com & install it on top of your current installation
*when there is a folder named "old firefox data" on your desktop, then you've done a [[Reset Firefox – easily fix most problems|reset of firefox]] which had reset most of your preferences to the factory default & removed all extensions. if you want to revert that, go to ''firefox > help > troubleshooting information'' and click on ''profile folder/show folder''. a windows explorer window should open up. now close all open firefox windows and replace all the contents of your current profile folder with the data that is stored inside the "old firefox data" folder on your desktop.
*the plugin check website isn't working at the moment - so the problem you're seeing here isn't on your end. hopefully this will be fixed soon on the server-side...