Run Norton LIve Update to update those Norton addons.

hello Batmann, mozilla is not responsible for the compatibility of third-party addons - norton's homepage states that their product is compatible with the latest version of firefox - you might have to apply all the updates in norton's LiveUpdate: https://www-secure.symantec.com/norton-support/jsp/help-solutions.jsp?ct=us&docid=kb20100720113635EN_EndUserProfile_en_us&lg=en&product=home&version=current&pvid=f-home

in case this doesn't work for you, please contact norton's support to find out if/when there's an update available for their product or how to resolve that...

the-edmeister,,,,,,,,,,,, Thanks my friend, I didn't Update after I install FireFox. My fault. Have a good one edmeister

Don't get so upset madperson, I fixed my issue, everyone should be happy!