Address Bar Popup ?
Is there a keyboard short-cut to open the address bar in a pop-up window ?
Not sure what you're asking exactly, there is a quick command popup which also serves as address bar, on F2
Also, press CTRL+F1 for a Keyboard shortcuts Cheat Sheet!
Or indeed press F2 and start typing what you're looking for, including actions and settings.
There's even a 'Focus Address Field' option in there.
Argh, I forgot F2 also suffices as an address bar