I want to upgrade to latest version but -Help/About Firefox- window does not show "upgrade" as in the instructions. I cannot find an "upgrade" function anywhere else. How do I upgrade? The version I have is -18.0.1- it came with this used computer. I believe this computer was hacked. Word started doing very strange things. We wiped the hard drive and reloaded everything as it was originally when I bought it. I am now getting hacked online. They originally got into one of my credit cards last fall. That is when this all started. They got my AOL email address. They also got the credit card current balance, minimum payment, due date and then even the payment amount. They got into my Barnes & Noble account and now checkout does not work. Now I believe they have gotten into my AOL account - one thing after another has started going wrong. I cannot change that AOL user id/email address since it is the master and I would lose about 15 years of "stuff". The folks that sold me this computer told me to use a free version of an antivirus. I am very unhappy with it. I never had ANY trouble when I used TrendMicro's expense products. Those folks also told me to use Firefox, since AOL uses Internet Explorer - which I already knew is like Swiss cheese. Now, I cannot seem to get an upgrade of Firefox. Is this also a hack? Please help any way you can. Thank you for your time.