Removing window titlebar when maximized

To use all the space available on the desktop, would be nice to hide the window titlebar. Previously - I think in KDE 3.5 - there was a window decoration which hid itself in maximized mode, but still gave the unmaximize and close buttons.

With compiz, we can just hide the window decoration when in maximized state. To hide the decoration under Firefox (which is almost all the time maximized) use CCSM (sudo apt-get install compizconfig-settings-manager). Go to the "Window Decorations", and under "Decoration windows" put:

title=Firefox - hides the decoration of firefox or
!state=maxvert - hides the decoration of all maximized windows.

One can use the gnome panel applet "Window Picker" which replaces the taskbar, shows icons instead of the tasks, and a the remaining place is displayed as the window titlebar, with an "X" close button on the end. This solution is used at the Ubuntu Netbook Remix. An example: