I'm not sure how this was solved - you have to scroll to tab 6 where the REAL solution resides. Why does the mod give the wrong answer???
First go to sittings stop samsung internet ,then go to play store find samsung internet app uninstall (three bars top left). After, unclick auto update. Internet and notification's are now gone (but the icon remains). Keep in mind, now you have to manually update apps - I'd check once a week - just don't select the Samsung internet update... Thanks to the original post (which i edited).
This is not a solution! I don't want this forced on me and automatically used on email links. This will be my last Samsung product. The disable button is grayed out! I hate everything about my S9+. Never again.