That's a good point. How do you create a "local working archive" of a website? It's a really good idea. Want to get started on working on some project like this?
You could download
- a page on it's own
- a page an all pages recursively for up to 3 levels
- optionally filtered by domain or path inside domain
- optionally including javascript (IIRC)
Sadly this is now broken in the new extension model and fixing it doesn't seem to be a priority.
Firefox is still my favourite browser by far but my enthusiasm isn't as strong as it used to be.
On the bright side even if it doesn't seem to be a priority work seems to progress on bringing the new extension APIs to a point where several of the old extensions can be recreated.