Visited

Good idea but it could do with extra options such as ignoring on certain sites. It feels like Chrome fails at this basic feature natively making this add-on very important. It would be nice as well if we could set a colour.

not working now

I give it only three stars because it doesn't allow to do something as simple -yet so useful, as to specify the desired color in settings. Just a simple box where users could set the hex color. Sometimes the default shade of red is too annoying or has too much contrast.