[Vimperator] How to debug firefox extensions?

[Lee Hinman]

Looks like Vimperator still doesn't work past version 0.3 on Mac, does 
anyone know how I would go about debugging the extension? I haven't ever 
debugged an extension before.

When firefox loads, the top menu and navigation bar is shown, the bar on 
the bottom is 10 times as large as it should be and no Vimperator 
commands/keys work at all.

Anyone have any ideas on how I could debug it?

- Lee