If your computer is looking for a server, it sounds like you might have a problem with your Internet connection. Chrome is probably trying to warn because .exe files can contain viruses. Chances are, if you're connected to mozilla.com and have https: (a secure connection), you don't have to worry about getting software with viruses or other malware. Is your account on your computer an administrator account? Are you able to install other programs without limitation? If not, you might not have administrative privileges, which will make it hard to install things. You can download things, that doesn't require admin privileges, but altering the computer's operation by changing programs requires such privileges. If you do have admin privileges, I don't know what could be causing your problem. Don't know if I've helped you or not, hopefully someone else knows specifically to what you refer and can answer, if my suggestions didn't do anything to help

Thanks for your response. I am an Admin on my computer and I do not have problems installing other programs. My internet connection is working fine. No problems getting to other sites. I have been having problems with Firefox crashing or not responding for several months and kept trying to install the upgrade each time thinking "Well maybe it will work this time." I was too busy to sit down and do a work-around. I did know that they do give warnings for .exe files, but for some reason it escaped me at the time because I thought for sure Mozilla would not be considered a malicious software.

I did go ahead and save the .exe file through Google Chrome and have since updated Firefox that way. So far so good! For those out there who are having this same problem, use another browser to download the .exe file then install it as an upgrade.