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10/11/21 update

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Firefox ran the annoying periodic update today and now it doesn't work at all. Cannot open anything. And, now to uninstall and reinstall, how do I avoid losing my bookmarks?

Firefox ran the annoying periodic update today and now it doesn't work at all. Cannot open anything. And, now to uninstall and reinstall, how do I avoid losing my bookmarks?

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Note: Firefox comes in three or more folders on all computers. They are;

Maintenance: (Programs Folder) <Windows Only> Firefox itself: (Programs Folder) And two folders in the profile of each user on the computer for each Firefox profile for that user.

If you remove the Firefox folder, the user profiles would not be affected.


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}