A new FireFox #19.0.2 has been released to get the update (2.6MB) use the FireFox bulletin updater. To use the builtin updater go to help>about firefox> check for updates The changelog is here fixes a security problem http://www.mozilla.org/en-US/firefox/19.0.2/releasenotes/. NOTE the Norton toolbar is working OK with this update. For info about the security fix go here https://www.mozilla.org/security/known-vulnerabilities/firefox.html