That it doesn't work in Firefox and Chrome isn't Apple's fault. It's up to the makers of the software to use the API. :/
Hugh
Doesn't it strike you as just a TAD bit poor that Apple cannot make THEIR dock work regardless of what app is running how?
I hate to burst people's bubbles. But in Windows 7 (I know that's a bad word around here), I can get the taskbar to show up by hitting the Windows key in ANY application, at ANY time, no matter how it's running. Why? Because the taskbar/task manager controls the apps, not the other way around. That's bass ackwards. It's called OPERATING system for a reason. What good is an OS that doesn't properly control the situation? How is it that people can justify an OS that can't even get its Dock to show except under certain apps? That makes absolutely no sense.
And unfortunately you guys are all-too-keen to make excuses here. "Mozilla didn't code it right!!!'1!!" "Google didn't code it right!!!1'1!" Instead of "wow. Apple created this funky container unnecessarily instead of just letting the app go into the normal full screen it always had and supporting that."
Whatever dude. I acknowledge it does work in Safari. But it's still broken if it requires an "Apple app" to function instead of working across the board.