We have released a Limited Compatibility patch for the Norton Toolbar which contains Firefox 43 compatible signed extension for Norton Security 126.96.36.199, Norton Security with Backup 188.8.131.52, Norton Internet Security, Norton 360, Norton Antivirus 184.108.40.206, Norton Security Suite 220.127.116.11. This patch is available via LiveUpdate to customers with a current subscription.
As with the previous Firefox release, the Norton Toolbar in Firefox 43 has Web-Protection functionalities enabled, but the VAULT feature is not available. More information about this limited compatibility is...
The Norton Toolbar now has limited compatibility with Firefox 41 & 42. Web-Protection functionalities are enabled, but the VAULT feature is not available with this update. We will be releasing another compatibility update to restore VAULT features to the Norton Toolbar on Firefox 41 & 42.