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Firefox install program will not run

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I was having problems with Firefox freezing (Not responding), so I uninstalled it and downloaded the installation program. Once downloaded I double clicked on the program. Norton said that it was safe, but the program never ran.

I was having problems with Firefox freezing (Not responding), so I uninstalled it and downloaded the installation program. Once downloaded I double clicked on the program. Norton said that it was safe, but the program never ran.

All Replies (4)

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Start Firefox in Safe Mode {web Link} by holding down the <Shift>
(Mac=Options)
key, and then starting Firefox. A small dialog should appear. Click Start In Safe Mode (not Refresh).

Is the problem still there?


Some problems occur when your Internet security program was set to trust the previous version of Firefox, but no longer recognizes your updated version as trusted. Now how to fix the problem: To allow Firefox to connect to the Internet again;

  • Make sure your Internet security software is up-to-date (i.e. you are running the latest version).
  • Remove Firefox from your program's list of trusted or recognized programs. For detailed instructions, see

Configure firewalls so that Firefox can access the Internet. {web link}

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My problem was not with opening Firefox, but with installing it. I realized that 50.0.2 might be for use with Windows 10, so I downloaded 37.0.2 for use with Windows 7 and it installed.

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As far as I know, 50 should install on your system.

Start your Computer in safe mode with networking. Then try the installer. Is the problem still there?

Starting The Computer In Safe Mode;
Free Online Encyclopedia

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Since I was having problems I'd rather stick with the older version.