Microsoft Edge’s new “Sleeping Tabs” feature will reduce RAM usage

Microsoft Chromium Edge

Web browsers like to use memory and give your computer a good
workout if you keep a lot of tabs open on a regular basic. On a
laptop or 2-in-1, this can have a negative impact on the
battery backup of your device. Fortunately, it looks like
Microsoft Edge’s next update will solve that problem by
automatically freezing those unused tabs.

Microsoft is working on a new feature called “sleeping tabs”
for Microsoft Edge that lets the browser tabs ‘sleep’ by
freezing those tabs down when they’re not in use.

Last year, Google introduced a similar feature called ‘freeze
tabs’ as a way to reduce the amount of RAM used by the browser.
Chrome’s freeze tabs feature, Microsoft Edge’s sleeping
tabs feature is more advance and it could help you reduce the
memory usage on Windows 10 or macOS.

Microsoft Edge’s new killer feature doesn’t actually close your
tabs. In theory, it only suspends/freezes tabs that you’ve left
fallow. According to an experimental flag in Edge Canary, this
feature will automatically put idle background tabs to sleep to
save resources.

Microsoft Edge sleeping tab

If you’re someone who keeps over a dozen tabs open at any given
time, this feature could help you boost the performance of
Windows 10, especially on low-end hardware.

In addition, when it’s time to revisit that tab, you need to
simply click on it and you’ll be able to access the tab again.

Microsoft says it will also observe “heuristic violations”
which are the characteristics to determine the activity of a
tab. For example, if a tab is playing audio or video in
background, Edge browser won’t freeze or suspend the tab
because it’s doesn’t qualify “inactive” metrics.

Microsoft will also allow you to configure a timeout setting to
decide when to put the background tabs to sleep automatically.

Edge sleeping tabs setting

As you can see in the above screenshot, Microsoft Edge will
automatically put your tabs to sleep after a set number of
minutes or hours.

For example, you can put inactive tabs to sleep after the
specified amount of time: 15 minutes, 30 minutes, 1 hour, 2
hours, 3 hours, and 6 hours.

Likewise, one experimental flag suggests that another option
will allow you to freeze tabs in one minute. This way you can
ensure that Microsoft Edge won’t eat up memory until you go
back to your sleeping tabs and load the page back up.

Interestingly, this feature also lets you whitelist any
websites, like Twitter or news feed, that are too important to

How to enable Sleeping Tabs in Microsoft Edge

To enable Sleeping Tabs in Microsoft Edge, follow these steps:

  1. Open Edge://flags in Edge Canary.
  2. Search for “Sleeping Tabs”.
    Sleeping tabs in Edge
  3. Enable the flags.
  4. Relaunch the browser.
  5. Head to Settings and search for “Sleeping Tabs”.
  6. Enable the feature.

Sleeping tabs support for Microsoft Edge is expected to land in
the stable builds later this year.

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