xpath code, replied by Avindra V.G.

Avindra V.G. — Fri, 02 Jan 2009 17:07:05 +0000

hi sir, nice script! suggestions:

change your "xpath block" to :

var allBody = document.evaluate("//body[@class='editable tr-field']", document, null, 8, null).singleNodeValue;

if (allBody)
        allBody.innerHTML = changeSignature() + allBody.innerHTML;

Discussion on Gmail Signature for Firefox 3 | Userscripts.org

xpath code, replied by Avindra V.G.