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I used MozBackup to backup my Firefox profile and after I installed Firefox on Windows 7 I simply restored the profile using Mozback up again.

Everything worked perfectly but strangely all my extension weren't working so i uninstalled all the extensions and tried to reinstall them but i get this error

firefox error

Has anyone encountered this? Any solutions?

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what does the error console log say? – John T Oct 4 '09 at 16:17
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protected by Diago Dec 21 '10 at 17:50

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2 Answers

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A possible solution from here says:

99% of the time it is going to be caused by corrupted configuration files on your computer.
To fix this problem follow these steps:

  1. Close Firefox
  2. Locate your Profile Folder

  3. Delete the following files from your profile folder:

    extensions.ini
    extensions.cache
    extensions.rdf

  4. Restart Firefox.

When Firefox restarts it will automatically rebuild the 3 files in step #3 above and should allow you to be able to install add-ons again.

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kudos! that worked like a charm! thank you – rzlines Oct 4 '09 at 16:40
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up vote 1 down vote

I suggest you using FEBE backup extension next time.I am using it and I got no problem up to now.You can pack all your extensions,bookmarks etc.. into one .xpi file so next time you can restore them with a one single click after Firefox set-up.

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