This is intended for people who would otherwise be dealing with this:
http://kb.mozillazine.org/Getting_started_with_extension_dev...
It's a package that compiles with a big start here arrow and intelligent defaults for toggle-on behavior and cross-tabbed browsing. As for the time savings? It reduced my own development time for a recent plugin to something on the order of 20 minutes. I'm sharing because it might be useful to someone else, not because I'm building a higher level API for Firefox. I don't have the time or inclination for that. :)
i really like the looks of this! thanks for posting.
CSS grids aren't that difficult, but I find http://960.gs/ really useful. Having a nice, packaged example of best practices comes in handy.
If this saves me 5 minutes each time I want to create a quick firefox extension, it provides value. Thanks for sharing, trevelyan!