Safari Browser Extension

Installed IS 5.4 on 2010 MacBookPro running Mountain Lion. The Safari browser extension for safe surfing did not install. Safe surfing is working in Firefox. How can I load the Safari extension?

 

Waring

Installed IS 5.4 on 2010 MacBookPro running Mountain Lion. The Safari browser extension for safe surfing did not install. Safe surfing is working in Firefox. How can I load the Safari extension?

 

Waring