I've had this issue with NIS as well. When I open either Internet Explorer or Firefox there is no Safe Search option or box to type searches in. Apparently with NIS you had to launch the web browser a few times before you were offered to set it up. As it stands I only have Norton Safe Share under Settings for the NTB.
Did Symantec remove Norton Safe Search in Norton Security? Or do I have to launch the web browser multiple times to get Safe Search to appear.