Don’t get me wrong, I think what Mozilla did is absolutely stupid. But unless it’s spying on you as you browse or whatever, how is this a problem? From what I see here in Developer Edition, it just iframes the chat window and docks it in a sidebar. It’s just bloat for people who don’t use it, or turn it off, and an upgrade for people who will use it.

My only problem with it is that this kind of stuff should be an add-on.