Firefox on Windows (cough ... ) problem

[bob 295]

My brother uses Firefox on Windows on my insistance that it is the least he 
could do to improve his web security.     However, he went ahead and upgraded 
to the latest and greatest version of Firefox the other day and now the 
startup time for the app is long enough to brew a pot of coffee and drink it 
too.    Alas I only run Linux and a Mac here so I'm not much use when it 
comes to the HowTo do things Windows.

How does one downgrade a Firefox installation on Windows?

Thanks.

bob
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