Where's the DOMi gone?

After upgrading to 1.5, I no longer have the DOM Inspector. And some
functions of the Web Developer extension no longer work, which is
assume is related.

This is really quite a serious problem for Mac developers. I've had to
go back to 1.07.

There are instructions for Windows users which involve running the
installer again and choosing some custom or advanced install -- but of
course there's no installer for OS X, just drag and drop.

I really think this is a serious omission. Nobody thought Mac FireFox
users might be developers? Nobody came up with a way to install it by
command-line, or as an extension? Is it just delayed, or forgotten
about altogether?