When I'm at a site with many different topics in a list, it's nice to see which ones I've already visited. Links that don't show this or (even worse) don't dif

When I'm at a site with many different topics in a list, it's nice to see which ones I've already visited. Links that don't show this or (even worse) don't differentiate as a link until they are moused over are one of my pet peeves.