Microsoft has adopted the Chromium open source project in the development of Microsoft Edge on the desktop to create better web compatibility. This new Microsoft Edge runs on the same Chromium web engine as the Google Chrome browser, offering you best in class web compatibility and performance.
The new Chromium based Microsoft Edge is supported on all versions of Windows 7, Windows 8.1, Windows 10, Windows Server (2016 and above), Windows Server (2008 R2 to 2012 R2), and macOS.
Starting with Microsoft Edge Canary version , you can enable the Ask Before Closing Multiple Tabs experimental flag in Microsoft Edge to prevent accidentally closing multiple tabs, the browser can prompt if you want to close all tabs. If enabled, you will be able to turn on or off Ask Before Closing Multiple Tabs in Microsoft Edge settings.
This tutorial will show you how to enable or disable Ask Before Closing Multiple Tabs in the Chromium based Microsoft Edge in Windows 7, Windows 8, or Windows 10.
EXAMPLE: "Do you want to close all tabs?" prompt for "Ask Before Closing Multiple Tabs" in Microsoft Edge
Read more: Browsers and Mail - How to Enable or Disable Ask Before Closing Multiple Tabs in Microsoft Edge