How to take a screenshot of desktop/entire screen

To capture a screenshot of your entire screen or a web page that's been restricted from running scripts, please follow steps below. 

1. Click Capture tab in the extension's popup menu
2. Choose the Entire Screen & App Window 

    3. In the "Choose what to share" window, click Entire Screen to choose a screen

  4. Click the Share button 

Related instructions:

How to capture content in a window or in an app window

What is a tab and what is a window in a browser