Since commit [1], the 'jquery.ba-bbq' library has been removed. Now, when you drop the Facebook snippet into a page, there is a traceback. This is because we were still using the 'querystring()' function from 'jquery.ba-bbq' to combine the parameters of the Facebook iframe's URL with its URL. [1]: https://github.com/odoo/odoo/commit/507c36883675a45a15485ce5c73aa4557ba23639 task-3543529 closes odoo/odoo#138592 Signed-off-by: Romain Derie (rde) <rde@odoo.com>