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i am trying to update to new firefox version but only shows on list as a download; doesn't change from old version

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I clicked on the green update box on Firefox homepage to update to the new version. The download occurred but it did not install. I shut down and restarted and it's still the old version. I looked at the help screen, and The Open File Security Warning dialog box does not appear for me so I cannot click Run to install. Help?!?! ops, never mind. I clicked on the downdload and the box came up am running now...

I clicked on the green update box on Firefox homepage to update to the new version. The download occurred but it did not install. I shut down and restarted and it's still the old version. I looked at the help screen, and The Open File Security Warning dialog box does not appear for me so I cannot click Run to install. Help?!?! ops, never mind. I clicked on the downdload and the box came up am running now...

Modified by helpplz20112012

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Download fresh installer from here and install