If you read a bunch of websites that do not relate to your work whatsoever while you're at work, well, here's the one chrome extension worth downloading: Panic Button. It quickly hides all of your open tabs in Chrome and lets you open them up all later. Like, when your boss isn't around.
You can set up PanicButton to either replace all your tabs with a blank page or a specific URL. Just activate it by pressing the PanicButton on Chrome or press F4 to hide and restore the tabs. You needed this in your life yesterday. [Chrome Web Store via