FreshInbox is a email productivity and collaboration tool for Gmail. To install FreshInbox in chrome:

  1. Open FreshInbox in Chrome Webstore

  2. Click on "Add to Chrome" button in the upper right corner

  3. Click on "Add extension" on the confirmation popup to allow installation.

  4. Navigate to Gmail

FreshInbox is currently available for Chrome only. You can learn how to activate FreshInbox here.