Allows you to override Chrome's default 'New tab' behavior.
By default, Chrome opens a special "New Tab" page that displays some of your most recently/frequently used pages. That's kinda cool, if you happen to be going to one of those places, but I find that it adds an extra click to my work flow every time I open a new tab. I'd rather just start with a fresh clean Google home page every time I open a new tab. Maybe you want something different, but here you have a choice.
This extension should work in both Windows (beta channel) and Mac (dev channel). http://dev.chromium.org/getting-involved/dev-channel
The chrome developers decided to make this functionality only available via extensions. See: http://code.google.com/p/chromium/issues/detail?id=68