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version 20 will not open, Says incompatible

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  • 1 has this problem
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  • Last reply by cor-el

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Installed version 20. After it opens I cannot get my e-mail address. So I exit Firefox and now it will not open. Tried the automatic method,but the program would not install. I cannot open firefox to try manual method

Installed version 20. After it opens I cannot get my e-mail address. So I exit Firefox and now it will not open. Tried the automatic method,but the program would not install. I cannot open firefox to try manual method

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Did you have Firefox 19 before and get the automatic upgrade, or was this a new installation?

You could try starting up in Firefox's Safe Mode. Hold the shift key when launching Firefox, then click the "Start in Safe Mode" button. Can you get further that way? If so, that points to one of your extensions or custom settings as the likely problem.

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Do a clean reinstall and delete the Firefox program folder before reinstalling a fresh copy of Firefox.

Download a fresh Firefox copy and save the file to the desktop.

Uninstall your current Firefox version, if possible, to cleanup the Windows registry and settings in security software.

  • Do NOT remove personal data when you uninstall your current Firefox version, because all profile folders will be removed and you will also lose your personal data like bookmarks and passwords from profiles of other Firefox versions.

Remove the Firefox program folder before installing that newly downloaded copy of the Firefox installer.

Your bookmarks and other profile data are stored in the Firefox Profile Folder and won't be affected by an uninstall and (re)install, but make sure that "remove personal data" is NOT selected when you uninstall Firefox.

If you keep having problems then also create a new profile.