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Firefox updates

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Hello I am presently running OS10.9.5 on a MacMini from 2013 because there are some expensive programs on there that I will lose when I update the OS. I now know I need to do that regardless. My question is: What OS version should I upgrade to for a secure version of Firefox and, MOST IMPORTANTLY... will my Comcast email account and bookmarks be carried into the upgraded Firefox browser? Thanks. a concerned Gary Bellucci

Hello I am presently running OS10.9.5 on a MacMini from 2013 because there are some expensive programs on there that I will lose when I update the OS. I now know I need to do that regardless. My question is: What OS version should I upgrade to for a secure version of Firefox and, MOST IMPORTANTLY... will my Comcast email account and bookmarks be carried into the upgraded Firefox browser? Thanks. a concerned Gary Bellucci

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