Step 1: Open dndemail.com and scroll at the bottom, then click Download.

Step 2: Click the link for Chrome Store Extension

Step 3: Click Add to Chrome

 

When you log in to your gmail account, you will see the DND buttons (one at the top and another one on the left side)
Step 4: Fetch Mail button at the top. Will let you fetch your email anytime you want.
Step 5: On the left side, you’ll have the DND ON/OFF button (If DND is on, you’ll see “Turn DND off”, if it’s off, it’s “Turn On DND”)

Step 6: Once you turn it back ON, it will let you set your fetch times, enable do not disturb, and open the Advanced settings of the DND app.