Help! I have lost the bar on the right of my screen!

[SpookyMadMummy]

You know, the one you scroll down with?

I am running windows xp and firefox browser

Please someone help me get it back! TIA

oh, that happens to me sometimes. I just use the arrow keys on my keyboard or close the window and reopen. (Am using a Mac and firefox.)

Its back! Thanks Edam. Had to restart in the end