I've got Firefox running on CentOS v6.

Somehow (possibly when the cat walked accross the keyboard), it went into Full Screen mode where it takes up all of the screen including the top desktop menu bar as well as the bottom status bar.

To see the Firefox menu bar, you mover the mouse up, and it appears, but not the desktop menu bar.

In about:config there is this: browser.fullscree.autohide

If I toggle that to false, the autohide goes away, but the browser is still full screen which as I said hides the desktop menu bar and status bar.

Firefox can only be minimized, not resized.

I uninstalled and reinstalled, but maybe the config file didn't get deleted?

What's the fix?

maybe I am misunderstanding your problem but...F11 to toggle full screen mode?

In CentOS / RHEL (Gnome) F11 does not function as you might think.

First, ESC+F11 will re-establish the browser menu bar, but you can still not resize the browser, only min/max. As well, the desktop menu bar / status bar are still not visible unless you min or close the browser.

there is a difference in FULL SCREEN and maximizing
<f11> VS. clicking the square on the top tool bar

FULL screen is just that 100% of the screen

to resize
mouse over the bottom left or right corner and the mouse will change into a drag icon

depending on the Desktop you are using
the default Gnome2
the toolbars have a option
ALWAYS VISIBLE
that is they will ALWAYS be on top even if a program is in full screen

BUT
that might make things NOT work it they are covered by the toolbars
as in you might NOT be able to click "yes" to setting changes

The fullscreen you have is not a desktop function, but a firefox function. You press F11 while firefox has focus - ist exits fullscreen.

However, if this does not work you can use the mouse: right click just on the right side of the search bar (not in the search bar, but to the right of it). A context menu pops up, with the option "Exit full screen mode".

and you can always turn back on the Firefox top toolbar menu

the NEWER versions have it turned off


r- click a empty space and from the pop-up put a check in the "menu bar"