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

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 [http://kb.mozillazine.org/Profile_folder_-_Firefox Firefox Profile Folder], so you won't lose your bookmarks or other personal data. see also: [https://support.mozilla.org/en-US/kb/install-firefox-mac Installing Firefox on Mac] thank you Please mark "Solved" the answer that really solve the problem, to help others with a similar problem.