The Google new tab page displays links to up to nine websites you visit most, nine recent browser and Google bookmarks, and three tabs closed within the past five minutes. You may find it necessary to clear your new tab page, like when you're shopping for a surprise gift and don't want anyone to find out (wink wink, nudge nudge). You can delete individual website thumbnails by following these steps:
On the bottom of your new tab page, click the Edit thumbnails link.
Click the X icon to remove a thumbnail.
If you're having trouble with new tab page and it isn't updating like it should, try these troubleshooting steps: