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How can I go back to the previous version of firefox - the new one is causing me major problems

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I have just installed the new version of firefox and I cannot access my works emails. I have been on for nearly 6 hours trying to sort it out and it is making me feel ill. How can I go back to the previous version of firefox as I could access my emails then

I have just installed the new version of firefox and I cannot access my works emails. I have been on for nearly 6 hours trying to sort it out and it is making me feel ill. How can I go back to the previous version of firefox as I could access my emails then

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To revert to the previous secure version, please do the following.


  • Go to Download Firefox v3.6.17 and download it to the desktop.
  • Then go to Add/Remove Programs, scroll down to "Mozilla Firefox" and remove it, choosing to keep your bookmarks, customizations etc., (don't checkmark the box).
  • Then reboot and delete the folder called "Mozilla Firefox" at this location: C:\Program Files\Mozilla Firefox
  • Finally run the installation file you downloaded to the desktop earlier.

Your bookmarks, customizations etc., are maintained in a different location and will become available to you again once you complete the installation.


After you downgrade, update these two plugins.


The version of Flash you have installed at the moment is a security risk. See http://www.adobe.com/support/security/advisories/apsa11-02.html