I was about to ask, "Anyone know the significance of the part-way filled red-links?" Did an inspect element/hover over the links and it shows the percentage th

I was about to ask, "Anyone know the significance of the part-way filled red-links?" Did an inspect element/hover over the links and it shows the percentage that the site is blocked, which seems to be the same as the proportion of the link background that is red. Pretty neat use of styling.