View > Statusbar = if it doesn't have a check-mark next to it, click on it.

I have checked and unchecked it a couple of times,but nothing.

Are you talking about the Firefox status bar at the bottom of the Window where you see link urls when you pass mouse over a link.

Is the window too low on the screen, like are you missing the bottom of the vertical scroll bar, or the rounded corners at the bottom of the window. If so move or resize the window

• drag window by title bar at top window
• resize window, by dragging edges of window, and then move window up.
• use "Alt+SpaceBar" and chose "Move" you may also need to resize with "Size:"

Perhaps an extension or a style to control which toolbars are shown when such as always, in full screen view, when maximized.

If still no solution try Firefox Safe Mode. If it works in safe mode than an extension or an extension setting is almost certainly the cause.

http://kb.mozillazine.org/Safe_mode

when the dialog comes up don't change any settings go directly to the "Continue in Safe Mode" button.

Thank you very much dmcritchie. You were right,somehow my window got resized and was'nt showing the very bottom of the window and the status bar. It all works fine now and again,thanks.