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After closing the firefox browser of new 4.0 it hangs and says its still running but no browser is visable, XP on 3.6 didnt have the issue ..so whats up???

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Open browser then close no browser is open and then click to re-open the browser it says it is still running and cannot get another browser for about a 45 sec....have Windows XP and didn't have the issue on 3.6 version.

Open browser then close no browser is open and then click to re-open the browser it says it is still running and cannot get another browser for about a 45 sec....have Windows XP and didn't have the issue on 3.6 version.

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