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Why is my instance of Windows 7 showing the equivalent of alt+tab when I press the tab button in Firefox v.12 and how do I stop it?

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Does it only do this while in Firefox? Which version of FF? Does it do it while in Safe Mode? How about if you run FF with no add-ons? Did it always do this, or is this new? –  Ƭᴇcʜιᴇ007 Aug 29 '12 at 15:23
    
To clarify @techie007's question, this is not normal behavior, so further details about what you're seeing and your exact configuration are helpful. –  Shinrai Aug 29 '12 at 15:41
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Press each of the modifier keys (Ctrl, Alt, Shift) on both sides of the keyboard to make sure the system doesn't think they are stuck down or something. –  Darth Android Aug 29 '12 at 15:44

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Try and use the same keyboard on some other machines. If the condition is reproducible, then there is definitely issue with your keyboard. Then I guess replacing it would solve your problem.

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... as Shinrai said 'To clarify @techie007's question, this is not normal behavior, so further details about what you're seeing .... are helpful' –  Crowie yesterday

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