Toolbar in FF 31.0 won't enable

I have Comcast Norton version 21.3.0.12 and have run Live Update until it says 'no mas'. When I updated to Firefox 31.0, the toolbar is disabled. I have toolbar version 2014.7.2.6. I am running Windows 7. I need to find out how to get the latest version of toolbar for Comcast. Any advice will be appreciated.