Norton Security in /windows 10

Hi  I have just got a brand  new HP Pavilion Laptop with Windows 10.  I took MacAfee out and put in on my Norton Security. 

I found that Windows 10  runs The Edge (a new MS browser ) but I don't like it much and Norton keeps telling me that some Norton extensions are not working in The Edge. 

So then I searched my system and found Internet Explorer 11 was also installed in the laptop. So I started using it.  Now I get Script bug errors. 

It is all driving me mad and worrying me that I am not fully protected.  Please advise on which browser is protected by Norton and also why the script bug error messages are appearing.

 

Thanks - Sue