autoHideStatusbar is a Firefox, SeaMonkey, Thunderbird and Flock extension that hides the status-bar. The status-bar is shown back when hovering a "sensitive zone" with the mouse. In Firefox and Flock, the status-bar can be shown back when a page loads or when hovering a link, according to the preferences. Additionally, a status-bar icon and/or a toolbar button (not in SeaMonkey) can be used to quick enable/disable.