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Firefox (Mozilla) browser stop working. I cannot download new version (Mozilla 16). I run the application. It tellsme the computer needs to shut down, It shuts

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My FireFox Browser stop working. I deleted old applications and tried unsuccesfully to open new versin (mozilla 16). I safe the application to desktop, run it, it tellsme the computer will turn off, it does, when the computer goes back on Mozilla is NO longer there. Then the cycle continues everytime I tried to download new application.

My FireFox Browser stop working. I deleted old applications and tried unsuccesfully to open new versin (mozilla 16). I safe the application to desktop, run it, it tellsme the computer will turn off, it does, when the computer goes back on Mozilla is NO longer there. Then the cycle continues everytime I tried to download new application.

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Which security software (firewall, anti-virus) do you have?

Some security software has virtualization features that may cause problems by protecting files in the Firefox program folder.


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.