How to parse HTML from JavaScript in Firefox?

Question

What is the best way to parse (get a DOM tree of) a HTML result of XmlHttpRequest in Firefox?

EDIT:

I do not have the DOM tree, I want to acquire i

Answer 1

You can use the DOMParser to parse HTML - even tag soup:

var parser = new DOMParser()
parser.parseFromString('
helloworld
', 'text/html')

I don't know if it handles partial table markup well, but it should create the same DOM the browser itself does for pretty much any markup.