I have also seen this when you close FF in maximized mode, then FF gets stupid about where is is supposed to be on the screen.

How I Fixed:
Open FF, it takes the entire screen
Press F11, or Alt-Space->unmaximize to make the window no longer full screen
Close FF
Reopen FF, it should come up windowed just like it was when closed
click the maximize button
Close FF
Reopen FF, all should be OK

Hope this helps
Kevin

On Mon, Feb 8, 2010 at 2:47 PM, Dale Farnsworth <dale@farnsworth.org> wrote:
>   Whenever I maximize Firefox in Ubuntu, it takes up my whole desktop.
>  Its really irritating because I have to press Alt-F9 to minimize it,
> as the window controls are gone (it super maximizes it, the header on
> the window is not visible nor is the other Gnome desktop controls).
> Any ideas on why this is happening?  This is the Gnome environment.

I saw a similar problem when my graphics card didn't support the
latest and greatest features.

Try setting Main Menu-> System->Preferences->Appearance->Visual Effects
to None.

-Dale
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