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trying to access a program that doen't support over 2.0

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I'm trying to log on to a site through work intranet, but it keeps telling me "irefox 4.0.1 - Failed We don't support versions above 2.0.x.x." can you help me?

I'm trying to log on to a site through work intranet, but it keeps telling me "irefox 4.0.1 - Failed We don't support versions above 2.0.x.x." can you help me?

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You can use the portable Firefox version for such websites.

You can find the portable Firefox 2.0.0.20 version under "Mozilla Firefox, P.E. Legacy > Mozilla Firefox":