Try New Lightning Experience Features with the Lightning Extension for Chrome (Generally Available)
Where: This change applies to Lightning Experience in all editions.
Why: The Lightning Extension lets us roll out new features continuously. Admins can control which features are available to their users.
How: Download the Lightning Extension for your browser. From the Lightning Extension features panel, choose which features to turn on.
To control which features are available to your users, from Setup, in the Quick Find box, enter Lightning Extension, and then select Lightning Extension. From there, you can activate individual features or disable the extension as a whole. Changes can take up to 24 hours to take effect.