I have been using Firefox version 3.0.7. I have been trying to update but the message I get is "The operation cannot be completed because you do not have sufficient privileges for some of the items." I have no idea what this means nor how to proceed.
I use firefox on my Mac (desktop) & my PC (laptop) & so I am not new to updating.
If there are problems with updating or with the permissions then easiest is to download the full version and trash the currently installed version to do a clean install of the new version.
Download a new copy of the Firefox program and save the DMG file to the desktop
- Firefox 6.0.x: http://www.mozilla.com/en-US/firefox/all.html
- Trash the current Firefox application to do a clean (re-)install
- 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.