1) Install it if you haven’t yet:
$npm install weinre -g
2) run it:
$ weinre -boundHost [your ip address here or localhost]
3) Put the following reference in the page you are trying to troubleshoot:
<script src=”http//[the ip address you entered]:8080/target/target-script.js#anonymous”></script>
4) Point your browser to the ip address you entered, that will give you the firebug kind of debugger:
http://[localhost or ip address]:8080/