hello mike, go to firefox > help > troubleshooting information and click on profile folder/show folder. a windows explorer window should open up - in there delete the file named localstore.rdf & restart firefox afterwards - this will reset the window proportions & customizations of the interface.

You can also try these steps:

• Use Restore or Maximize in the right-click context menu of the Taskbar icon to set focus to the Firefox application if you do not see the Firefox window.
• Open the system menu of that Firefox window via Alt+Space and see if you can move and resize that window (use the keyboard cursor keys).

If that works then first close all other open Firefox windows and then close Firefox via "File > Exit/Quit" to save that setting.

If the above didn't help then see:

• http://kb.mozillazine.org/Corrupt_localstore.rdf

Thanks cor-el I deleted my localstore.rdf file and am now back to normal. Unfortunately I occasionally get randow mouse movements and I took my finger off the mouse just as it was moving.

Mike