Sleeping Tabs is a feature in Microsoft Edge, introduced in late 2020, which lets the inactive browser tabs sleep after a specified time to save system resources. This feature is based on Chrome's "freezing" technology, but way better than that. An initial report has shown a 26% reduction in memory usage of the browser.
Now, with Microsoft Edge 100, the company has updated sleeping tabs to enable pages that are sharing a browsing instance with another page.