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I can't access Firefox after trying to change the settings for the administrator/current user. I also can't delte the program and reload it.

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  • Last reply by cor-el

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In attempting to change the administrator settings to enable me to avoid the constant request asking if it is OK for Mozilla to access my computer, I have caused the system to completely block ccess to Firefox. It also blocks me if I try to uninstall Firefox to download it again. this is very frustrating!

In attempting to change the administrator settings to enable me to avoid the constant request asking if it is OK for Mozilla to access my computer, I have caused the system to completely block ccess to Firefox. It also blocks me if I try to uninstall Firefox to download it again. this is very frustrating!

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What settings did you change? is the user you are logged in as an admin or standard user?

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In such cases check that Firefox isn't set to run as Administrator.
Right-click the Firefox desktop shortcut and choose "Properties".
Make sure that all items are deselected in the "Compatibility" tab of the Properties window.

  • Privilege Level: "Run this program as Administrator" should not be selected
  • "Run this program in compatibility mode for:" should not be selected

Also check the Properties of the firefox.exe program in the Firefox program folder (C:\Program Files\Mozilla Firefox\).


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.

  • It is important to delete the Firefox program folder to remove all the files and make sure that there are no problems with files that were leftover after uninstalling.
  • (32 bit Windows) C:\Program Files\Mozilla Firefox\
  • (64 bit Windows) C:\Program Files (x86)\Mozilla Firefox\

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.