Click the wrench icon on the browser toolbar.
Mac users: If you don't see the wrench icon, go to the menu bar at the top of your screen and click Chrome.
(Preferences on Mac and Linux; Settings on Chrome OS).
Click the Under the Hood tab.
Click Content settings in the Privacy section.
Click Exceptions on any tab to customize how resources for specific websites should be handled. Want to add a site to the exceptions list? In the "Pattern" field, you can enter hostnames and IP addresses, as well as specific domain masks (e.g. enter [*.]google.com to match everything from google.com and www.google.com, but not othergoogle.com).