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Firefox just tried to upgrade to 9 from 8 and now I am in a loop. it keeps asking to restart to complete new version but will not complete.I have restarted in both safe an normal mode. xp pro and all up to date except firefox any ideas on how to fix this?

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  • Last reply by cor-el

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Firefox tried to upgrade and it failed.It now has a message about restarting to complete upgrade. you can't uninstall it because the same message appears. it will not start no matter how many restarts. had to switch to chrome.

Firefox tried to upgrade and it failed.It now has a message about restarting to complete upgrade. you can't uninstall it because the same message appears. it will not start no matter how many restarts. had to switch to chrome.

Chosen solution

Did you try to delete the current Firefox program folder (C:\Program Files\Mozilla Firefox\) ?

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If files already have been downloaded then remove the files in the updates and updates\0 folder.
You can also delete active-update.xml and possibly updates.xml (stores the update history).

C:\Documents and Settings\<user>\Local Settings\Application Data\Mozilla\Firefox\Mozilla Firefox\updates
(%USERPROFILE%\Local Settings\Application Data\Mozilla\Firefox\Mozilla Firefox)

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

Uninstall your current Firefox version, if possible.

  • Do NOT remove personal data when you uninstall the current version or you lose your bookmarks and other data in the profile folder.

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

Your bookmarks and other profile data are stored elsewhere in the Firefox Profile Folder and won't be affected by a reinstall, but make sure that you do not select to remove personal data if you uninstall Firefox.


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deleted" C:\Documents and Settings\<user>\Local Settings\Application Data\Mozilla\Firefox\Mozilla Firefox\updates" still in loop. if you try to uninstall it prompts you to reboot. if you try to install a fresh copy it asks for a reboot. every action starting the program asks for a reboot. I do not want to lose my entire profile or I would just delete all files since it will not allow an uninstall.

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Chosen Solution

Did you try to delete the current Firefox program folder (C:\Program Files\Mozilla Firefox\) ?