You are talking about two different computer systems.

You should ask for help here; https://support.norton.com

http://community.norton.com/

marv6 said

Norton toolbar still does not work on my win 8.1 computer with firefox 49.0, however it works just fine on my labtop win vista computer. Why?

Same version of Norton? Same version of the toolbar extension?

the-edmeister, the answer is Yes to both questions.

https://community.norton.com/en/forums/pre-release-norton-identity-safe-extension-firefox-browser

Note it is Symantec that supports Firefox with their Norton extensions and not the other way.

Problem solved. Norton toolbar was not checked in tab.