The Microsoft Edge web browser is based on Chromium and was released on January 15, 2020. It is compatible with all supported versions of Windows, and macOS. With speed, performance, best in class compatibility for websites and extensions, and built-in privacy and security features, it's the only browser you'll ever need.
The sleeping tabs feature in Microsoft Edge makes background tabs sleep after two hours of inactivity by default in order to free up resources for active tabs, new tabs, and other applications on your device. Sleeping tabs will fade to indicate they’ve released resources. To resume a sleeping tab, click/tap on it like a normal tab. The tab will un-fade and your content will be immediately available.
When efficiency mode is turned on and active, inactive background tabs will be put to sleep after 5 minutes or less.
Learn about performance features in Microsoft Edge - Microsoft Support
Learn about performance features in Microsoft Edge, such as sleeping tabs, efficiency mode, and performance detector.
This tutorial will show you how to turn on or off fade sleeping tabs in Microsoft Edge for your account in Windows 10 and Windows 11.
1 Open Microsoft Edge.
2 Click/tap on the Settings and more (3 dots) button, and click/tap on Settings. (see screenshot below)
3 Click/tap on System and performance in the left pane. (see screenshot below step 4)
4 Turn on (default) or off Fade sleeping tabs for what you want. (see screenshot below)
Fade sleeping tabs will be grayed out and disabled if Save resources with sleeping tabs is turned off.