Do you can't differentiate the visited link in Google?
          
         .
          Now you have blue color in visited links.

          You use Google Chrome Browser frequently and the unvisited and visited links colors are too                   close each other, very hard to distinguish.So  you can change the color of the links

         

 --- click SETTINGS
        --- click EXTENSION
        --- find the stylist extension and click OPTIONS
        --- click STYLES
        --- click ADD NEW STYLE
        --- copy & paste the following:
        A:visited { color: red ! important }
         --- name the style
        --- click the ALL SITE check box
        --- click SAVE---