cannot complete operation (update) because you do not have sufficient privileges for some items
updating to 3.6.6, get message "cannot complete operation because you do not have sufficient privilege for some items". Running the new second version, works fine, but slow, the old version not updating
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See http://kb.mozillazine.org/Installing_Firefox#Mac_OS_X ..... Download a new copy of the Firefox program: http://www.mozilla.com/firefox/all.html Trash the current Firefox application to do a clean reinstall. Install the new version that you have downloaded. Your profile data is stored elsewhere in the Firefox Profile Folder, so you won't lose your bookmarks and other personal data.