In this post, you will learn how to Enable or Disable Sleeping Tabs in Microsoft Edge Chromium. Microsoft introduced Sleeping tabs in Microsoft Edge to improve the memory and CPU usage of the browser. Sleeping tabs built on the core of Chromium’s “freezing” technology (which pauses a tab’s script timers to minimize resource usage) to create sleeping tabs. Sleeping tabs allow inactive background tabs to “go to sleep”, releasing system resources (memory and CPU) after a set amount of time for other tabs or applications running on your device.
Microsoft Edge typically increases battery life as a sleeping tab uses 26% less CPU on average compared to a non-sleeping tab. It also reduces memory usage by 16% on average. Your overall savings with sleeping tabs will vary based upon your browser usage and the total numbers of tabs you use. The more tabs you have, the more savings you’ll see.3


Enable or Disable Sleeping Tabs in Microsoft Edge Chromium
- Open Microsoft Edge.
- To quick access Enable sleeping tabs settings, type or copy and paste the following following path into the address bar and press Enter.
edge://flags/#edge-sleeping-tabs
- From the Enable sleeping tabs drop down menu, Select the Enabled option. Once done! changes will take effect after you restart Microsoft Edge.

Modify Sleeping Tabs Settings
- Open Microsoft Edge, click on the … (3 dots) in the top-right corner of Edge and then click on Settings.

- Navigate to Settings > System.

- Under Save resources section, Specify time interval for tabs to go to sleep after in Put inactive tabs to sleep after the specified amount of time drop down menu. By default, tabs go to sleep after two hours of inactivity.
Note – By accessing Microsoft Edge Settings under Save resources > Save resources with sleeping tabs section. You can use this option to turn on or off sleeping tabs .

- Once configured, Tabs that are asleep will fade to let you know they’ve released resources.
Note – A sleeping tab resumes automatically when clicked.

Disable Sleeping Tabs for Specific Sites
- In Microsoft Edge, Select Settings > System. Under Save resources section, click the Add button for the Never put these sites to sleep option.
- Type the Site URL to add a site that you never want to go to sleep and click on Add.

- Once done with above steps, Microsoft Edge settings page will show the configured settings as shown below

Resources
- Microsoft Edge 89: Delivering improved browser performance
- Introducing Sleeping Tabs Experiment: Improving Memory Usage in Microsoft Edge
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