What Sleeping Tabs Do in Microsoft Edge
Microsoft Edge includes a feature called Sleeping Tabs (officially named Sleeping Tabs in the settings interface). This feature automatically puts inactive browser tabs into a low-power state to free up system resources such as memory (RAM) and CPU usage. When a tab is sleeping, it stops actively updating its content until you click back on it. At that point, the tab reloads and becomes active again. This can help improve browser performance, reduce battery drain on laptops, and keep Edge running smoothly when many tabs are open at the same time.
The feature is enabled by default in recent stable versions of Microsoft Edge. However, you may want to adjust how it behaves, disable it for certain websites, or turn it off entirely depending on your workflow. The steps below explain how to manage these settings.
How to Access the Sleeping Tabs Settings
The controls for Sleeping Tabs are located within Edge’s main settings menu. The exact menu path has remained consistent across recent versions of the browser, though the layout may shift slightly with major updates.
- Open Microsoft Edge on your computer.
- Click the three-dot menu button in the upper-right corner of the browser window (it looks like “…”).
- Select Settings from the drop-down menu.
- In the left sidebar, click System and performance.
- Scroll down to the section labeled Optimize Performance.
You will see the Sleeping Tabs toggle and several related options in this section. If you cannot find the setting, use the search bar at the top of the Settings page and type “sleeping tabs” to jump directly to the correct location.
How to Enable or Disable Sleeping Tabs
Within the System and performance section, the first control is a toggle switch labeled Save resources with sleeping tabs.
- If the toggle is blue and positioned to the right, Sleeping Tabs are enabled.
- If the toggle is gray and positioned to the left, Sleeping Tabs are disabled.
Click the toggle once to switch between the two states. Edge will apply the change immediately. You do not need to restart the browser.
When Sleeping Tabs are enabled, Edge will automatically put background tabs to sleep after a set period of inactivity. The default timeout is usually five minutes, but you can change this as described below.
How to Adjust the Inactivity Timeout
You can control how long a tab must remain inactive before Edge puts it to sleep. Shorter timeouts save more resources but may cause tabs to reload more often when you return to them. Longer timeouts keep tabs active longer but use more memory.
Under the Sleeping Tabs toggle, look for the dropdown menu labeled Put inactive tabs to sleep after the specified amount of time.
Available options typically include:
- 30 seconds
- 1 minute
- 3 minutes
- 5 minutes (default)
- 15 minutes
- 30 minutes
- 1 hour
- 2 hours
- 3 hours
- 6 hours
- 12 hours
Select the interval that best suits your usage. If you frequently switch between many tabs and want them to reload less often, choose a longer timeout. If you keep many tabs open for long periods without actively using all of them, a shorter timeout can free up more memory.
How to Keep Specific Tabs Active
Some websites, such as webmail, music streaming services, or collaboration tools like Google Docs, may not work well when put to sleep because they rely on continuous background activity. Edge allows you to create an exception list so that certain domains are never put to sleep, even when Sleeping Tabs are enabled globally.
To add a website to the exception list:
- In the same System and performance section, find the heading Never put these sites to sleep.
- Click the Add button.
- Type the full URL of the website you want to exclude (for example,
https://mail.google.com). - Click Add again to confirm.
The site will now appear in the list below. Edge will keep tabs from that domain active regardless of inactivity. You can remove a site from the list at any time by clicking the “X” next to its name.
If you want to add the site you are currently viewing instead of typing the URL manually, you can also right-click an open tab and select Never sleep this site from the context menu. This adds the domain to the same exception list automatically.
How to Control Visual Indicators for Sleeping Tabs
By default, Edge shows a visual cue when a tab is sleeping. A sleeping tab appears slightly dimmed or faded compared to active tabs. You can turn this visual indicator off if you prefer a uniform appearance.
In the System and performance section, look for the checkbox labeled Show visual indicator for sleeping tabs.
- If the box is checked, Edge will visually dim sleeping tabs.
- Uncheck the box to hide the visual indicator. Tabs will still sleep according to your settings, but they will look the same as active tabs until you click them and they reload.
How to Control Tab Discarding
Edge also includes a related feature called Tab Discarding, which is separate from Sleeping Tabs. Tab Discarding removes a tab from memory entirely when system memory is low, rather than putting it into a low-power state. When you return to a discarded tab, Edge reloads it from the network or from disk cache if available. This feature is controlled by a separate setting in the same section.
Under Optimize Performance, you may see a toggle labeled Increase efficiency with sleeping tabs and tab discarding or similar wording depending on your version. Enabling this option allows Edge to discard tabs aggressively when the system is under memory pressure. Disabling it keeps tabs in their sleeping state rather than removing them from memory entirely.
If you find that tabs are being reloaded too often, especially when you have many other applications open, you may want to disable tab discarding while keeping Sleeping Tabs enabled. Test both configurations to see which one works better for your typical workload.
Common Problems and Observations
Sleeping Tabs generally works reliably, but you may notice a few behaviors worth understanding.
When you click on a sleeping tab, it takes a moment to reload. The delay is usually less than a second for simple pages but can be longer for complex web apps. If you frequently switch between tabs, a longer inactivity timeout or an exception list for key sites can reduce the number of reloads.
Some browser extensions that monitor tab activity may interfere with Sleeping Tabs. If you notice that tabs are not sleeping despite the feature being enabled, try disabling extensions one at a time to identify the cause.
Sleeping Tabs applies only to background tabs. The currently active tab and any pinned tabs remain active by default. If you want pinned tabs to sleep as well, there may be an experimental flag available in edge://flags, but this is not a standard setting and may change between updates. For most users, the default behavior of leaving pinned tabs active is sufficient.
Frequently Asked Questions
Does Sleeping Tabs close my tabs?
No. Sleeping Tabs does not close or remove tabs. It only puts them into a low-power state. The tab remains visible in the tab bar and will reload its content when you click on it.
Will I lose unsaved data in a sleeping tab?
If you have unsaved input in a form field or a text editor within the tab, that data may be lost when the tab sleeps and later reloads. Edge does not automatically save form state across sleep cycles. If you are working on important content, save it before switching away from the tab, or add the website to the exception list.
Does Sleeping Tabs work in Private or InPrivate windows?
Yes, Sleeping Tabs applies to all windows, including InPrivate browsing windows. You can manage the same settings for all windows through the main Edge settings page.
Can I use Sleeping Tabs on all operating systems?
Sleeping Tabs is available in Microsoft Edge on Windows, macOS, and Linux. The exact settings layout may vary slightly between operating systems, but the feature functions similarly across all of them.
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