Microsoft Edge has a built-in task manager that shows the statics of each site that is currently opened in the browser. If you’re facing slow performance while browsing through Microsoft Edge, you can check which site or extensions might be slowing down your system through the Task Manager.
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In this guide, we will show you how to check which website is consuming more resources in Microsoft Edge.
How to Use Microsoft Edge’s Built-in Task Manager
Here’s how you can do it:
Start by opening “Microsoft Edge” from the Start menu or clicking on the Edge icon pinned to the taskbar.
Next, open the menu in the Edge browser window by clicking on the three horizontal dots at the upper-right corner of the screen.
From the menu, select “More Tools”, and click on the “Browser task manager” option from the extended menu.
Browser Task Manager window will appear on the screen in which a list of all the tabs, processes, and extensions that are currently running is displayed. 
Each column depicts the system resource used by every tab. Here’s what each column means:
Memory: It tells how much system memory a tab is using in KBs.
CPU: It shows how much CPU capacity a tab is using.
Network: The amount of network bandwidth used by a tab is displayed in this column. Tabs that stream media like videos and music will use more bandwidth.
Process ID: This is very useful for in-depth developer troubleshooting as it shows the process ID of the tab.
In order to check which tab is consuming more data, click on the column heading i.e., “Memory”, the most memory-intensive tab will move to the top of the list.