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just installed the latest update and now nothing works--why?

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wfan
wfan
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I have been running firefx and occassional updates without trouble but I was asked to install ver 4 and now nothing is working when I try to open the browser it will not start. How can I go back to the old version and skip this update which has now taken my entire operating system down?

I have been running firefx and occassional updates without trouble but I was asked to install ver 4 and now nothing is working when I try to open the browser it will not start. How can I go back to the old version and skip this update which has now taken my entire operating system down?