Norton Confidential issues this alert: This version of Firefox is not supported by Norton Confidential. You will not be protected while browsing the Web. Norto
No matter what version or update I install, Norton Confidential will not support it. Symantec support is also clueless.
The alert: This version of Firefox is not supported by Norton Confidential. You will not be protected while browsing the Web.
Norton Confidential cannot protect you while you use this version of Firefox. Phishing Protection requires Firefox 1.5 or later.
Opaite Mbohovái (2)
I think Norton Confidential has been discontinued and is no longer supported. It might not be compatible with any version of Firefox since 2012, based on the number of compatibility threads from that era.
What features does Norton Confidential offer that you want to use? Maybe there is a good and maybe even free alternative.
The old Norton Confidential has been replaced by Norton Identity Safe. https://identitysafe.norton.com/