Firefox extension to alert on missing .js files?

Question

I am porting a Web App to a new environment. Due to changed paths, some references to JavaScript Files () are broken. I know of no way to make Firefox / Firebug / the web developer toolbar to warn on missing JS files, or at least issue an information somewhere.

Am I overlooking something? Thanks in advance.

Answer 1

The Net tab of Firebug should highlight any missing JS files in red.