Plugin which utilises Javascript Debugger and/or JetBrains IDE support Chrome extension

Hi,

I've been looking into developing a plugin based on the exisiting Javascript debugger, that will prompt for (or attempt to automatically generate) mappings of remote URLs to local files, based on require paths when given a URL.

I was hoping to basically copy the Javascript debugger and modify it, but given that it is not open source (if I'm wrong and it is open source, a link would be much appreciated!), I'm a bit stuck.

If I could extend or interface with the Javascript debugger somehow, this might be a good way to go. If not, I was thinking that a good starting point might be trying to interface with the JetBrains IDE support Chrome extension (or Firefox equivalent).

Are either of these 2 ideas possible, and are there any docs on either? Or examples of others doing something similar?

Thanks.