I've done this for my parents for close to 10 years now. Been able to give them a stable gui environment over the years going from Gnome2 to MATE. Mozilla Sui

I've done this for my parents for close to 10 years now. Been able to give them a stable gui environment over the years going from Gnome2 to MATE. Mozilla Suite to Seamonkey to combo Firefox/Seamonkey email client. Really, the biggest issue is that websites will complain about seamonkey/firefox, saying things like "your browser not supported", "please upgrade your browser", etc.