How to Use Sleeping Tabs in Microsoft Edge

Keeping many browser tabs open can consume memory, processor time, and battery power even when you are not actively viewing them. Microsoft Edge’s sleeping tabs feature reduces the resources used by inactive background tabs while keeping them available for later.

This guide explains how to turn on sleeping tabs in Microsoft Edge, choose when tabs should sleep, keep important sites active, and fix common problems when the feature does not behave as expected.

What sleeping tabs do in Microsoft Edge

A sleeping tab is an inactive background page that Edge temporarily pauses. Microsoft explains that sleeping tabs reduce CPU use and release some memory for the active tab, other tabs, and applications on the computer. A sleeping tab normally appears faded and wakes when you select it.

Sleeping a tab does not close it, remove it from the tab bar, or erase its browsing history. In most cases, clicking the tab restores it quickly without making you find the page again.

How to turn on sleeping tabs

1. Open Microsoft Edge.
2. Select the three-dot Settings and more menu in the upper-right corner.
3. Choose Settings.
4. Select System and performance.
5. Open or scroll to the Performance section.
6. Turn on Automatically put tabs to sleep.

You can also enter edge://settings/system/managePerformance in the address bar to open the relevant settings directly. The wording may vary slightly between Edge versions, but the controls are found in the System and performance area.

Microsoft’s current Edge performance documentation says inactive background tabs normally sleep after two hours by default, although Edge settings, energy saver, organisational policies, and memory pressure can change that behaviour.

Choose how quickly inactive tabs sleep

After enabling sleeping tabs, find Put inactive tabs to sleep after the specified amount of time or similarly worded setting. Open the menu and select an inactivity period.

A shorter delay may help when you routinely keep dozens of tabs open or use a computer with limited memory. A longer delay can be more convenient when you frequently switch between web apps and do not want them paused. Start with 30 minutes or one hour, then adjust the setting based on how you browse.

If the interval is locked or different from what you selected, check whether Edge’s energy saver is active. Microsoft notes that energy saver may put tabs to sleep after 30 minutes or less to reduce power use.

How to recognise and wake a sleeping tab

Edge can fade inactive tabs after they go to sleep. To wake one, click it as you would any other tab. The tab should return to its normal appearance and become usable again.

Some pages may briefly refresh or reconnect, particularly web apps that depend on a live session. If an important page loses unsaved work when sleeping, add that website to the always-active list rather than disabling the feature for every tab.

Turn off the faded-tab appearance

If faded tabs make the tab bar harder to read:

1. Open Settings > System and performance.
2. Go to the Performance settings.
3. Turn off Fade inactive tabs.

This changes only their appearance. Edge can continue putting eligible inactive tabs to sleep.

Keep a website from going to sleep

Webmail, dashboards, browser-based phone systems, messaging tools, music services, and editing apps may need to remain active. Add only the sites that genuinely require continuous background activity:

1. Open Settings > System and performance.
2. Go to Performance.
3. Find Always keep these sites active.
4. Select Add site.
5. Enter the site’s full address and select Add.

To edit or remove an exception, open the three-dot menu beside the listed site. A shorter exception list preserves more of the resource-saving benefit.

Why some tabs do not go to sleep

Edge deliberately keeps certain pages active to reduce interruptions and compatibility problems. According to Microsoft, a tab may remain awake when it is:

• The currently visible tab.
• Playing audio.
• Using the microphone or camera.
• Sharing or capturing a screen or window.
• Casting or mirroring content.
• Connected to a WebUSB device.
• Open in developer tools.
• An organisation’s internal site.
• Added to the always-active exception list.

Some tabs can also share browser processes or resources with another page, which may keep them awake. A tab not sleeping is therefore not necessarily a fault.

Sleeping tabs versus discarded tabs

Sleeping and discarding are related but different:

• Sleeping tab: Edge pauses much of the page’s background work and releases some resources. Returning to it is normally quick.
• Discarded tab: Edge removes the page content from memory more completely. Selecting it requires the page to reload.

Microsoft says automatic discarding can happen after a sleeping tab remains unused across browsing sessions. Discarding can release more memory, but it may also reload the page and lose page state that was never saved.

How to put a specific tab to sleep

Edge’s performance hub may identify individual tabs using unusually high CPU or memory. To inspect it:

1. Open the three-dot Settings and more menu.
2. Select More tools.
3. Choose Performance.
4. Review any tab flagged for high resource use.
5. Open the menu beside that tab and choose Sleep tab if the option is available.

Do not put a tab to sleep while it is uploading a file, saving work, running an online meeting, or performing another task that must continue in the background.

How to turn sleeping tabs off

If a critical web application repeatedly stops working:

1. Open Settings > System and performance.
2. Select or scroll to Performance.
3. Turn off Automatically put tabs to sleep.

Before disabling the feature completely, add the affected website to Always keep these sites active. This lets other inactive tabs continue saving resources.

What to do if sleeping tabs are not working

Restart and update Edge

Open Settings and more > Help and feedback > About Microsoft Edge. Edge checks for an update on this page. Install any available update and restart the browser.

Remove unnecessary site exceptions

Review Always keep these sites active. Broad entries or websites added in the past can prevent more tabs from sleeping than intended.

Check for managed settings

A work or school administrator can control sleeping tabs, the inactivity timeout, and blocked websites through Edge policies. If a control is greyed out or marked as managed, the local setting may not be changeable. Contact the organisation’s IT administrator rather than attempting to bypass the policy.

Review active media and permissions

A page using audio, video, screen sharing, a microphone, a camera, casting, or a connected USB device may stay awake by design. Stop the activity first, then wait for the selected inactivity interval.

Check energy saver

Energy saver can apply a shorter sleeping interval than the one you selected. Review its Balanced or Maximum setting under System and performance if tabs sleep earlier than expected.

Practical settings for different browsing habits

For a computer with limited memory

Enable sleeping tabs, select a shorter delay such as 15 or 30 minutes, and keep the always-active list small. Close tabs you no longer need instead of relying on sleeping tabs indefinitely.

For online work and browser-based tools

Use a moderate delay and add only essential tools that must receive updates in the background. Save work before switching away from editing pages, even if they are excluded from sleep.

For battery-powered laptops

Keep sleeping tabs enabled and consider Edge’s energy saver when you are away from a charger. Microsoft notes that reducing background-tab activity can help lower power use, although actual benefits vary by device and browsing habits.

Organise tabs as well as putting them to sleep

Sleeping tabs reduce resource use, but they do not solve tab clutter. Close pages you have finished, bookmark reference material, and use tab groups for active projects. If you also use Chrome, see how to save and reopen Chrome tab groups.

For privacy rather than performance, our separate guide explains how to clear Microsoft Edge browsing data when you close it.

Frequently asked questions

Do sleeping tabs close my webpages?

No. They remain visible on the tab bar and normally wake when selected. A discarded tab is different because Edge reloads its page content.

Will a sleeping tab lose form entries?

It usually retains the page, but web applications behave differently and a later discard or session timeout can force a reload. Save important work before leaving a tab inactive.

Why is a tab faded in Microsoft Edge?

A faded tab usually indicates that Edge has put it to sleep. Click the tab to wake it, or disable Fade inactive tabs if you want sleeping tabs to keep their normal appearance.

Why does a music or meeting tab stay awake?

Edge avoids sleeping tabs that play audio or use media-capture features such as a microphone, camera, or screen share.

Can my employer control sleeping tabs?

Yes. Microsoft provides enterprise policies for enabling the feature, setting the timeout, managing site exceptions, and controlling automatic discarding.

Conclusion

Microsoft Edge sleeping tabs can reduce the resources used by inactive pages without forcing you to close them. Turn the feature on under System and performance, select a practical inactivity interval, and add only essential sites to the always-active list. If a tab stays awake or sleeps too quickly, check media activity, exceptions, energy saver, and managed policies before disabling the feature.

Featured image: Photo by Salah Ait Mokhtar on Unsplash.