We have released a Firefox 26 compatibility patch for Norton Internet Security 188.8.131.52, Norton 360 184.108.40.206, and Comcast Norton Security Suite 220.127.116.11 which is available via LiveUpdate. The patch is also available for the Norton 2013, Norton 2012, and Norton Identity Safe standalone product.
The versions for this compatibility update are as follows:
Norton Internet Security, Norton 360 & Comcast Norton Security Sui...
Dear Norton Community,
We have completed testing our latest update of Norton Antivirus, Norton Internet Security, and Norton 360 18.104.22.168, and are ready to release the patches for all languages. To download the update, simply run LiveUpdate. As with our previous updates, this version is being released in a phased manner; see the below FAQ for details. A reboot will be required for Windows XP & Vista customers, however no reboot will be required for Windows 7 or Windows 8 customers.
To verify you have the update, launch the Main User Interface, click on Support, and select About.