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How to Fix: This Webpage is using Significant Memory in Safari?

The Safari Browser error “This webpage is using significant energy. Closing it may improve the responsiveness of your Mac.” is generally due to overloading the RAM memory with heavy web pages and tabs. A few of the easiest ways to fix this error is to force quit the Safari browser, clear browser cache, and closed the less useful tabs.

Surfing the web is the new norm now, and I won’t be surprised if you open multiple tabs on your Safari browser. Since the adoption of the feature of multiple tabs, it’s easy to open multiple websites and look for relevant details in one go.

But as you open websites, you might see this message pop up multiple times: This webpage is using significant energy. This is usually followed by a sub-message that closing this tab can help improves systems performance.

Safari browser is very efficient when it comes to resource allocation, but when you open multiple tabs (I’m taking 10+ tabs), this management can go haywire. A message like this can definitely alarm you, but how serious is this, and what do you do to fix it.

I’ve been using a Mac for the last 5 years, and this message pops us now and then. So here is s complete guide to fix the — This website is using significant memory in the Safari Mac problem.

Safari can hold many tabs easily, even with 4GB of RAM. Still, if your workload is higher, then you will start seeing performance issues to the point where the Safari browser will not be able to open normal websites such as Google, Facebook, Reddit, etc. Below are step-by-step troubleshooting methods that will help you to stop this message.

Close less useful tabs

Sometimes we can take all the power we have for granted, but power is not unlimited. You can’t just open 100 tabs in your Safari browser and expect it to run butter smooth. I’m a person who keeps multiple tabs open and switches between them while working.

Hence, it’s a good idea to close all the irrelevant tabs when not in use. And in case you want them to visit later, you can always bookmark them or put them into your reading list.

Force quit Safari

Some web pages have very buggy code, or I use to call it spaghetti code. This is very uncommon to have a website with a bad code design, but if it has, then it is going to use all the resources of your PC. And as a result, Safari will throw you – the “This webpage is using significant energy. Closing it may improve the responsiveness of your Mac” message.

In this scenario, you can force quit the Safari browser and run it again. Any issues with jumbled-up code will get fixed immediately.

Here are the steps to force quit Safari on Mac:

  1. Click the Apple apple logo in the upper-left corner.
  2. Select Force Quit from the dropdown menu.
    This will open the Force Quit Applications window.
  3. Select the Safari app from the list.Force Quit Application window with Safari Browser
  4. Click the Force Quit button.

Relaunch Safari to see if the problem is solved. If not, try restarting your Mac as a simple restart can fix a variety of issues, including this one.

Use a content and ad blocker

In today’s online generation, most websites are swamped with advertisements. These adverts do use a lot of your PC resources, especially in video advertisements.

Safari is good at blocking unnecessary junk code such as tracking info and advertising info as such. But it’s not perfect, but there are other third-party extensions that are good at blocking content to keep the CPU usage at a minimum.

Here are the steps to install a content blocker in Safari Mac:

  1. Open the Adblock website on the Safari browser.
    Get AdBlock Plus on Apple App Store
  2. Download and Install the Adblock for Safari Mac extension.
    AdBlock Extension in Safari Browser
  3. While installing, share all the relevant permissions like webpage content and browser history.

Now Adblock will automatically block heavy resources using ads so you won’t see any warning messages. If you do, we have more methods to fix it down the line.

Our site rely on advertisement for monetization that helps us to support bills and create amazing helpful content for free. Please do consider whitelisting our site in adblocker.

Disable plug-ins

Plug-ins are just a special name for extensions Safari. They are a small teeny-tiny program your Safari browser uses to give you extra functionality. But they can use much of your resources, so I advise all my friends to keep plugin installation to a bare minimum.

Here are the steps to disable Plug-ins in Safari Mac:

  1. Launch the Safari browser on the computer.
  2. Navigate to Preference… and switch to the Advanced settings tab.
    Safari Preferences menu under Apple Logo
  3. Enable the checkbox for Stop plug-ins to save power.
    Stop plug-in to save power option in Safari preferences

This will disable all your plugins that were utilizing the memory in the browser. Now just check the Safari browser to verify if the websites will run smoothly.

Clear Browser Cache

Browser Cache is a temporary file and storage database in your browser that helps certain websites load faster and provide better usability. But if you don’t clean browser cache time to tie, it can slow down your browser and, in some cases, ruin your browsing experience.

The error message This webpage is using significant energy. Closing it may improve the responsiveness of your Mac and can be sometimes fixed by clearing the browser cache manually.

Here are the steps to clear browser cache in Safari Mac:

  1. Launch the Safari browser on the computer.
  2. Navigate to Preference… and switch to the Advanced settings tab.
    Safari Preferences menu under Apple Logo
  3. Enable the checkmark for the Show Develop menu in the menu bar option.
    Show Develop Menu in Menu bar option in Safari PreferencesThis will enable the new Develop tab in the menu bar.
  4. Click on the Develop menu, and choose the Empty caches option.
    You can also use the Safari keyboard shortcut Shift + Command + E to open Empty cache window.
    Empty Cache command in Safari Developer Menu
  5. Choose the time period from the drop-down list.
  6. Hit on the Clear History command button.
    Clear History for Last One Hour option in Safari Mac

After clearing the cache successfully, all your websites will function normally. However, you may need to sign in to accounts that you’ve recently visited and got cookies cleared.

Check for Mining Scripts

Some websites, especially mining websites that use CPU resources at a very rapid rate, and as a result, you might get these error messages. If a website such as an online editor or online tool shows you this message, that is understandable.

But if a normal website shows you the error message of using significant memory in Safari, then it means it must be using some Mining scripts. Check for the website sign some online mining detector tool; if it contains mining scripts, do not use the website.

Update Safari and macOS

macOS developers keep updating the OS for better resource management, security, and performance. If your device is relatively old and you’re using some old mac OS version, then you definitely need to update your system.

Here are the steps to Update macOS System:

  1. Select System Preferences from the Apple apple logo.
  2. Open Software Update to automatically check for updates.
    This will check and let you know if any updates are available.
  3. Click on Upgrade Now for updating OS.
    Update Software Operating System in Mac

You can click on More Info for further details about the software update.

Upgrade RAM

RAM and CPU are the two main key factors of your PC performance. If you do have to use a resource-hungry website for work purposes or your college research work for some reason, you need to upgrade the RAM of your Mac.

Upgrading the CPU in Mac PC is not possible as they are soldered onto the logic board, and it’s quite expensive to upgrade. But you can, in fact, upgrade RAM to get better performance.

Bottom Line: Safari Significant Memory

As you see, the severity of this problem is not so much and with a simple troubleshoot, you can fix this problem without any professional help.

Now, if you use the internet much more often and need to open multiple tabs (more than 10), this message will greet you many times. So it is a good idea to upgrade your RAM and other components to match your PC energy needs.

Let us know if any of these methods have helped you resolve the Safari error – This webpage is using significant energy. I believe we are able to help, please share any other troubleshooting that fixed your problem.

FAQs: Fix: This Webpage is using Significant Memory in Safari

Now, let us go through the frequently asked questions regarding how to Fix “This Webpage is using Significant Memory in Safari.”

What are the major ways to Fix “This Webpage is using Significant Memory in Safari?”

The major ways to Fix “This Webpage is using Significant Memory in Safari” are close less useful tabs, delete cache and browser data, disable plugins, Force quit Safari, and use a content and ad Blocker, upgrade RAM, update Safari and macOS, and Check for Mining Scripts.

How to disable Plug-ins in Safari Mac?

Launch the Safari browser on the computer and navigate to Preference and switch to the Advanced settings tab. Finally, enable the checkbox for Stop plug-ins to save power.

How to force quit Safari on Mac?

Click the Apple icon in the upper-left corner and select Force Quit from the dropdown menu. Select the Safari app from the list and click the Force Quit button.

Lastly, here are the recommended web browsers for your computer and mobile phone that you should give a try.

WindowsMacOSiOSAndroidLinux
Chrome WindowsChrome MacChrome iOSChrome AndroidFirefox Linux
Firefox WindowsSafari MacSafari iOSEdge AndroidChrome Linux
Edge WindowsFirefox MacEdge iOSSamsung InternetEdge Linux

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6 thoughts on “How to Fix: This Webpage is using Significant Memory in Safari?”

  1. Glen McAllister

    What are you talking about w.r.t. disabling Internet Plug-ins in Preferences>Advanced? There is no such setting in Safari 14.1.2 preferences.

  2. Herb Weiner

    It’s too bad there’s no way to tell Safari to stop popping up this annoying warning. (I know that displaying 3D content on my 3D TV is using significant memory.) The solution is to switch to a different browser, like Google Chrome.

  3. Frederick Malouf

    The Internet plug-in option is not available in Safari 15.1. Any other way to do this?

  4. Donald Claxton

    Dude, I’m running Monterey v 12.3 and Safari 15.4. Why, if this posted on 3.17.22, are you showing such archaic graphics? Glen is right, there are no buttons anything like the ones you show on the advanced screen. I wonder if that’s cos I’ve got my Developer bit turned on, however, I’m also running 40 GBs of RAM so RAM, I’m pretty certain, isn’t the issue.

    1. Editor

      Hello Donald, we have the website design makeover that made changes to published dates. We know that’s incorrect and we are updating the article with the latest information and screengrabs.

  5. Jim Price

    I have macOS Catalina 10.15.7. There is no time period drop-down list on Develop -> Empty Caches. NOTHING happens when Empty Caches is clicked.

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