That seems rather odd if you can not download it on two separate alternative browsers. Where are you trying from ?

• getfirefox.com
  • https://www.mozilla.org/firefox/all/

You could even try the ftp downloads from https://ftp.mozilla.org/pub/firefox/releases/48.0.2/win32/ As your current issue appears to be with Windows or alternative browsers that is outside our area of expertise. See also

• How to install Firefox on Windows

Hello joyanne, John

also, try to download and install firefox from the second link from John's reply ...../all/ but when you are in Windows Safe Mode with network support (press F8 on the boot screen).

thank you