You can whitelist websites in the edge://settings/system page's Optimise Performance section. There is no option to put tabs to sleep manually, though users have requested the feature on Microsoft's feedback hub. It is a decent way to monitor the system, though Windows' Task Manager still beats it since you can get a breakdown of the resource usage on a per-tab basis.

You can pin the Performance monitor to stay on top, to keep an eye on the resource usage. This will open a pop-up window that displays the number of tabs that are sleeping, and a graphical indicator to show you the percentage of memory savings with sleeping tabs, and remaining usage. To access it, click on the three-dot menu and select Performance. Edge 100 has added a new performance monitor, to provide a way for users to see how Sleeping Tabs is helping save system resources. That is quite impressive, and if you are interested in crunching the numbers, you will probably like this. Changing the Efficiency mode in the Performance pop-up panel, to 'Always', will snooze tabs faster. This allows Sleeping Tabs save up to 85% of memory, and 99% CPU usage on average. How does that work? Pages that are sharing a browsing instance with another page will be put to sleep. The announcement from the company says that Edge will put 8% more tabs to sleep, to save more resources. I think we can agree that sleeping Tabs is a handy feature, and Microsoft Edge 100 improves it further. Brave Browser is the only one that doesn't support Tab Snoozing natively, but that can be easily fixed by using an extension like Auto Tab Discard. Waterfox G4.1.0 which was released yesterday added Tab Unloading, and allows you to snooze tabs manually. Edge is not the only browser to support it natively, it is also a feature that you can find in Google Chrome, Mozilla Firefox, Opera, and Vivaldi.

This is also called Tab Unloading, Tab Discarding, or Tab Snoozing. idle tabs, and snoozes them automatically. Sleeping Tabs monitors tabs that you haven't used for a while, i.e. As you browse the internet and hoard a number of tabs, the browser begins to consume more resources, which results in a dip in the system's performance. It was rolled out to all users in Edge 89, in March 2021. The feature debuted in September 2020, when Edge Canary 87 was released. The Redmond company has highlighted that the latest version improves the browser's performance with a more optimized version of Sleeping Tabs. Microsoft Edge 100 was released a few days ago, and is essentially a security update.

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