I am using Internet Explorer and want to block certain websites (to increase my productivity, not that it matters). I went to: Internet Options > Privacy > Sites. It promises to block certain domains and I added three sites there:
quora.com theverge.com reddit.com
Yet I am able to open all three websites. What am I missing? If it helps, my Windows account is Administrator and I am using Internet Explorer 11. OS is Windows 8.1 Update 1.