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Every time I update Firefox I can't get back on the internet. I have to uninstall and go back to an old Firefox.

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I have an old Firefox. Every time I update to a new version, I can't get back on the internet. It tells me it can't find the server. So I have to uninstall the updated version and go back to my old version.

I have an old Firefox. Every time I update to a new version, I can't get back on the internet. It tells me it can't find the server. So I have to uninstall the updated version and go back to my old version.

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Check your firewall settings.

http://kb.mozillazine.org/Firewalls