Visit the Dayscape page (or search for 'Dayscape') on the Chrome Web Store and click the Add to Chrome button.
When prompted click the Add extension button.
If you do not have Chrome sync enabled you may be prompted to turn it on. Sync is a Chrome feature using your Google account. It syncs your Chrome information such as history and settings across all your Google devices.
Dayscape can use the sync feature to keep your Dayscape settings and links consistent across all your Chrome desktop browsers. If you do not enable Chrome sync your Dayscape settings will be kept separate. It's entirely up to you.
When you next open a new Chrome tab or window you'll be notified the page was changed by the 'Dayscape' extension. Click Keep it. Now each time you open a new tab or window in Chrome you'll be using Dayscape.