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window starts to open then closes; right click on icon shows open windows but cannot open to use

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opening firefox the window flashes and closes to right of screen. clicking on icon does nothing. right clicking shows 1 or more windows, but they will not open.

opening firefox the window flashes and closes to right of screen. clicking on icon does nothing. right clicking shows 1 or more windows, but they will not open.

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I have this exact same problem - I use WIN 7 and FF 3.6.13 - no one believes what I am seeing (except you :>) ) - hopefully someone will be able to respond with a solution I have uninstalled FF and re-installed same problem The FF WIN 7 taskbar preview shows the correct display and when I click it I get a flash and it appears to go off right side of screen

Modified by lighthouse47