Did you try install → disable
Or, remove Norton Safe Web
fwiw ~ by my read:
Protect your searches with Norton Safe Search reads like notice for Norton Safe Web users that the Norton Safe Web extension will stop providing the ratings to all search engines except for Norton Safe Search.
And to continue seeing site ratings, Norton Safe Web users will need to install the Norton Safe Search extension.
by my read:
regardless of whether Norton Safe Web users have Norton Safe Search installed now or not
================================
Care to try Bitdefender Traffic Light [here]