Yesterday morning I uninstalled FF 13.0.1 which I had been using since Jun 2012. I then did a clean install of Firefox 15.0.1.
I printed out a copy that Tony_Weiss submitted, Firefox 15 Support for Norton Toolbar for reference. I must have done a couple of dozen manual Live Updates including reboots numerous times since yesterday and I am still not getting the Norton Toolbar Add-on for firefox. I get all other update except that one.