[catch23]

sorry to say this, but I think their API is great. They are innovating, and innovating requires breaking something. If the devs can't keep up, they shouldn't be creating extensions in the first place. Same could be said of iPhone development as well... it just so happens that the cool platforms tend to have more underlying changes than static platforms aka windows. (and even under windows, development can be shaky if you're doing stuff in .net)

EDIT: I'd also like to add that this version of Firebug actually does work in FF3.1. It's only that in their install.rdf file, they specified 3.0.*. I changed it to 3.1b2pre and re-built the extension and it seems to work great under Minefield. I think they put the version restriction to prevent people from reporting bugs for the still beta FF3.1.