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Problem upgrading to FF 13.0.1

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When trying to upgrade I get the message indicated below.

I am not sure which "items" the message refers to.

When trying to upgrade I get the message indicated below. I am not sure which "items" the message refers to.

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If you have problem to update/upgrade firefox, the best you can do is to download and install the new version:

1. Download the latest version from :

 http://www.mozilla.org/en-US/firefox/all.html

2. Trash the current Firefox application to do a clean install.

3. Install the version that you have downloaded (13.0.1).

Do not select to remove your personal data, your profile data is stored elsewhere in the Firefox Profile Folder, so you won't lose your bookmarks or other personal data.

see also: Installing Firefox on Mac


thank you

Please mark "Solved" the answer that really solve the problem, to help others with a similar problem.