MyMac won't let me update Firefox. The error message says I don't have the authority to do that. I am the administrator of the computer. I check the controls and I am still the administrator. I prevent kids from downloading anything.

When I drag it per the installation window the popup error says
"The operation cannot be completed because you do not have sufficient privileges for some of the items."
I have a macbook pro (unibody) running OX 10.5.8.
I AM the administrator. It just let me update microsoft office so it looks like the failure to update is targeted at Firefox.
I ran Avast for Mac (Beta and free) last night and it found 14 infected files mostly connected with Java (so much for the virus fee Mac theory). I deleted them all via the program. Then rebooted and redownloaded the new Firefox. Still got the same error message.
I'd appreciate any suggestions, help... magic wands LOL

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 disk image (dmg) file to the desktop
*Firefox 8.0.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 if you uninstall and (re)install Firefox.
*http://kb.mozillazine.org/Profile_folder_-_Firefox

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