Open up a new tab and get greeted by a stunning, moving view. That's the concept behind Live Start Page, which also adds a clock and to-do list to your start page.
Currently there are several live motion photos you can set as the background, live wallpapers, and static backgrounds as well. Since a live background could slow down you computer, you have the option to install lower quality backgrounds instead of the high definition version.
You can customise how everything looks on the start page in the extension's settings. Also handy: when you double-click on the background you'll access the speed dial of your most visited sites.
Live Start Page - Living Wallpapers (Free) [Chrome Web Store]