Why has my Norton Safe Search Box disappeared after updating to Firefox 46.0.1

I updated to Firefox 46.01 and my Safe Search box has disappeared. Is it available yet? (The Norton safe Search box is still showing on my IE11.) I also wanted to know why I was not able to sign in to my Norton Community Account and had to create a new account, but was able to use my old user name. I have been a member for years.

(Windows 7 Ultimate)