It all changes again in 1.5. (sigh) It's like a game where every time I upgrade Firebug on a machine I have to relearn the entire UI. I have no idea why they do it pretty much every single time. (FYI-- http://getfirebug.com/releases/firebug/1.5X/ )
I overheard a developer looking for 15 minutes to find the "inspect" option when it became a flashlight. Now it's some square with a cursor pointed at it (which isn't so bad), but now there's a little "Off" button over on the right side instead of the way I typically closed the window. So now I double-take whenever I'm trying to hide Firebug-- I keep wondering for a split second if I'm clicking the right button.
I love Firebug more than any other extension ever (besides the Tree-style tabs), but the UI refactoring keeps messing me up.