Оказалось надо было просто mozilla-firefox научить понимать outerHTML
//учим firefox outerHTML
if (typeof(HTMLElement) != "undefined") {
var _emptyTags = {
"IMG": true,
"BR": true,
"INPUT": true,
"META": true,
"LINK": true,
"PARAM": true,
"HR": true
};
HTMLElement.prototype.__defineGetter__("outerHTML", function () {
var attrs = this.attributes;
var str = "<" + this.tagName;
for (var i = 0; i < attrs.length; i++)
str += " " + attrs[ i ].name + "=\"" + attrs[ i ].value + "\"";
if (_emptyTags[this.tagName])
return str + ">";
return str + ">" + this.innerHTML + "</" + this.tagName + ">";
});
HTMLElement.prototype.__defineSetter__("outerHTML", function (sHTML) {
var r = this.ownerDocument.createRange();
r.setStartBefore(this);
var df = r.createContextualFragment(sHTML);
this.parentNode.replaceChild(df, this);
});
}
//конец обучения
