Www.deere.com is unsafe?

John Deere web site is unsafe???  Does John Deere know about this??

I have a JD tractor and was looking for parts.  Norton Security says the site is unsafe.  Did a chat with Norton and he took over my computer to modify the firewall he says.  After he was done, things worked ok until I realized the Norton add-ins were no longer in my browser.  (identity save, tool-bar, save search). As soon as I enabled them the problem returned.  Actually, after many years with this product, I'm thinking they have lost their competence.  Maybe I try a new VENDOR!