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This Webpage Is Using Significant Memory/Energy on Safari, What to Do?

Many Safari-users found that when using Safari on a Mac, " This webpage is using signific ant memory (or energy). Closing it may improve the responsiveness of your Mac " will suddenly pop up. Some users also reported that this message appeared when they tried to use Safari to open Netflix, Facebook, and websites such as CNN, CBS, MSN and so on. Many a user also encountered the same error when using another browser, Firefox.

This Webpage Is Using Significant Memory

Why Does Safari Keep Saying: This webpage is using significant memory (energy)?

Currently, there is no clear reason to explain why this error occurred. But it's related to the update of macOS High Sierra for the problem only came out after users have upgraded the system to macOS High Sierra on their MacBook. The problem hasn't been seen on macOS Sierra, OS X El Capitan or earlier.

In this regard, here are six easy ways for you to figure out how to fix "This webpage is using significant memory(energy" on Safari.

1. Force Quit Safari

It's a simple way to quit Safari. Open Apple icon, then click Force Quit Application. After that, choose Safari in the app window. At last, click Force Quit button to quit.

Force Quit Safari

2. Turn off Extensions on Safari

If you want to figure out why the error "this webpage is using significant memory/energy" pops up, turning off Safari Extensions is the way to go.

Step 1 . Choose Preference from the Safari menu. Step 2 . Select the Extensions icon, then you'll see many extensions from the list. Choose one extension. Step 3 . To turn off that extension, deselect the Enable checkbox. Step 4 . Now, it's time to see whether if the "significant memory/energy" error comes back after turning off an extension. If the answer is yes, clicking Updates to update the extension or you can delete the extension by clicking the Uninstall button.

Disable Safari Extension

3. Delete Internet Plug-ins from Safari

Internet plug-ins and other add-ons can also be the reasons why Safari is acting weirdly. So deleting unused plug-ins may help to fix the report of the webpage with significant memory.

Step 1Quit Safari and Open Library folders

Open Go > Go to Folder from the menu bar. Then type /Library and click Go to open the Library folder.

Step 2: Remove Files from Library Folders

The following Library folders contain files for Safari add-ons. Move the listed files in these folders to the Trash

  • Internet Plug-Ins (Keep in mind that do not remove these files: Default Browser.plugin, nslQTScriptablePlugin.xpt, Quartz Composer.webplugin, or QuickTime Plugin.plugin.)
  • Input Methods
  • InputManagers
  • ScriptingAdditions

Clear Internet Plugins

Step 3: Put the Files Back to Library Folders

See whether removing the files from these folders resolves the issue. If it works out, quit Safari again. Then gradually put the files back to Library folders until you find the file that is causing the problem.

4. Clear Safari History, Cookies and Cache

At the very beginning, I would like to explain what are cookies. Cookies are files on your Mac which help to keep the information of what you've done on a website. To remove history and cache of Safari, there is a useful app for you to clear cookies, history on Safari at once: FonePaw MacMaster , which can remove data that you don't need completely. The following steps below are to help clear Safari's history and cache on Safari.

Step 1 . Download and install FonePaw MacMaster on Mac. Step 2 . Select Privacy option. Step 3 . Click Scan. Wait until scanning is done, choose Safari. Tick Cookies, Search History and more, click Clean button so as to clear Safari history.

Clear Safari History

5. Switch to Google Chrome For Help

If the problem has not been resolved, you can use Google Chrome to replace Safari. The message "this webpage is using significant memory or energy" haven't been found on Google Chrome.

6. Update or Downgrade macOS

The error appears only after upgrading to macOS High Sierra. So you can try upgrading your MacBook or iMac to the latest macOS Mojave version or downgrading High Sierra to an earlier version.

Above is the full guide to figure out how to fix "This webpage is using significant memory(energy" on Safari.

SHARE THIS ARTICLE!

guest

I am using OS X El Capitan on a 2015 Macbook Pro with Safari 11.1.2 and just received this message while on a webpage. You assertion it is related to the High Sierra update would therefore appear to be incorrect.

HakunaMatata Vibe

Hey! Yeah, I agree! I am using macOSMojave and still I have this message!

Yorgi1950

I'm also using Mojave and I still keep getting this message. I called apple sometime last year and the tech seemed like she had never heard of the problem. Re-installed Mojave and didn't help one dang bit!! Computer slows to a crawl when typing and when I try to close the window I'm on, I have to click the red close button 30 or 40 times! The colored ball comes up and keeps on spinning and spinning forever. Has anyone found a solution for this???

Callum Giles

Are you still having this issue?

I was. I just installed Big Sur and so far, no problem.

Kenny Dorman

This is happening on Mojave so it is defiantly not related to High Sierra at all. Can someone please fix this, it is driving me mad! ????

I upgraded to Mojave and it's still happening. I spoke with a tech sometime last year when I had High Sierra and the tech didn't seem to know anything about this. I re-installed High Sierra but shortly upgraded to Mojave hoping that would fix the problem. No such luck!

Ds9000

So no head fix?

*Smashes phone; stomps skateboard*

"Wonders will never cease" I've heard that statement several times over the years, but have never had the opportunity to use it myself.....until now! I don't have a clue just exactly what I did, but I haven't had that dreaded "webpage is using significant memory/energy" notice appear on my screen in over a week now! I re-installed Mojave - didn't help at all. But then I went thru finder and dumped anything and everything I no-longer needed from documents, downloads, recents, desktop....everything. Then got rid of "Ad Block" and installed another one from the App Store, and lo and behold....NO MORE "Webpage is using...."! One full week of peace and internet bliss. Don't give up folks, because somehow, someway there is a solution to this problem.

Marie

@Yorgi1950 - Glad to hear you found a solution! Forgive me if you already answered my question in your post already, it's early, and my coffee has not kicked in yet, lol. Is Truth Finder the extension you are using now? If not, which on did you find that works, and does it block ads in YouTube videos effectively like Adblock Plus? Is it configurable? (i.e. can you whitelist and can you turn it off at will if you need want to view something on a site but don't want to whitelist the site)? I am running Mojave 10.14.6 (just ugraded from High Sierra about a week ago). Thank you, for any help you can provide. Marie

Hi Marie, The only TruthFinder I know of is the website you use to get some personal info on someone. I also have never used YouTube, or Facebook for that matter. (I know, I'm a relic from the past! LOL). I know what whitelisting is, but also have never used it. Do I sound like a broken record? LOL! I am so sorry I can't be of help to you. As I stated, cleaning out Finder of anything I no longer needed seemed to do the trick. I have been thinking of replacing Mojave with the new Catalina that has been released. Wish I could help you, but I think I may have been a dinosaur in my past life, as computers are like learning a new language to me; it just ain't gonna happen!

This only happens to me on Yahoo and it still happens with Mojave. I have tried setting preferences for Yahoo to disable any extensions in Safari and additionally making sure the ad blockers themselves (that are in my toolbar) were also disabled for the site), it still does not change how much memory consumption Yahoo uses. Perhaps I need a different ad blocking program that is just as effective at blocking ads, but also blocks ads in videos on YouTube? I have Adblock and Adblock Plus installed. I only recently upgraded from High Sierra (in the last week). I am not going to downgrade software or remove my plugins, so that answer will not help. Any suggestions for a safe adblocking software that works with both Safari (primarily) and Chrome that will also block ads in YouTube videos on Safari?

tommyphi

Remove Adblock. It is nasty-ware (my opinion). Adguard works much better and much faster.

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How to fix “Webpage is using significant energy”

safari using significant energy

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. This article will help you fix the “webpage is using significant energy” error.

safari using significant energy

Why Safari is overloaded

The underlying reason for the “This webpage is using significant energy” error is your Mac’s resources being stretched too thin. This might either be the result of too many tabs open or even just a few tabs with websites that are continuously refreshing and loading up new scripts and content.

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. If none of that had any result, proceed with a few more steps below.

1. Close less useful tabs

Opening 100 tabs in your Safari browser and expect it to run butter smooth, which is not a good idea.

I advise you should 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. If the alert persists, you can force quit the Safari browser and run it again.

2. Empty Safari’s cache and cookies

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 can be sometimes fixed by clearing the browser cache manually.

To clean your cache in Safari:

  • Go Safari ➙ Preferences in the menu bar (or use ⌘ + ,).
  • Navigate to the Advanced tab and check the box “Show Develop menu in menu bar.”
  • Now select the Develop menu in menu bar and click to Empty Caches.
  • Restart Safari to make sure the cache is clear.

safari using significant energy

In addition, it could be beneficial to delete your cookies:

  • Open Preferences once again.
  • Go to the Privacy tab ➙ Manage Website Data

  • Click ⌘ + A to select all fields.
  • Remove All.

safari using significant energy

After clearing the cache/cookies successfully, all your websites will function normally.

3. Turn off all Safari extensions

Extensions can use much of your resources. So disabling them might actually help the problem, especially if you have lots going at the same time.

To turn off Safari extensions:

  • Fire up Preferences
  • Go to Extensions.
  • Uncheck all boxes to disable your extensions.
  • Restart Safari to see if the error has disappeared.

safari using significant energy

4. Disable plug-ins

Internet plug-ins and other add-ons can also be the reasons why Safari is acting weirdly.

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

  • Launch the Safari browser on the computer.
  • Navigate to Preference
 and switch to the Advanced settings tab.
  • Safari Preferences menu under Apple Logo
  • Enable the checkbox for Stop plug-ins to save power.

safari using significant energy

5. 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:

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

safari using significant energy

We suggest that you don’t worry about this alert, because Safari, by sending you this error message, is just looking for you and is attempting to warn you of a website that’s drawing on system resources.

But some things are outside of your control. If you get this error message and you don’t notice a significant reduction in performance or battery life, then it may be best to just ignore it. We hope that Apple addresses this warning message in future versions of Safari and macOS.

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Safari 14 Using Significant Energy

  • Thread starter Taz Mangus
  • Start date Sep 19, 2020
  • Sort by reaction score
  • Older macOS Versions
  • macOS Catalina (10.15)

Taz Mangus

macrumors 604

  • Sep 19, 2020

I have Safari v14 installed under Catalina 10.15.6 with all the latest Supplemental updates. I have Safari set so that when I launch it to show the Start Page, not the Home Page. I noticed that with Safari only showing the Start Page, not browsing to any websites and not having any extensions installed, under battery it shows Safari Using Significant Energy . I have looked at the preference settings and even looked at the Develop preferences in Safari. Nothing seems to get rid of it. Anyone else seeing this? I have reported this to Apple Feedback for Safari.  

This seems to be an intermittent situation. I browsed to this website and Using Significant Energy went away. It came back again when I opened a new tab which only had Start Page in it. I close the Start Page tab and it is now showing Using Significant Energy again. And now it just stopped again. Very strange behavior.  

gabo_macondo

gabo_macondo

Macrumors newbie.

  • Oct 3, 2020

Apple should realize that people use laptops or MacBook primarily for internet browsing. I saw many posts saying that wi-fi and browsing causes faster battery drain in MacBook. Does that mean I should use other laptops for work and MacBook only for watching movies and all? When will Apple fix this issue with Safari and Wi-Fi which eats battery like a demon? It is a short-sighted thinking from the technology giant!  

macrumors regular

  • Oct 7, 2020

The new Safari update is the worst so far. Draining too much energy, lagging. What did Apple think when they were about to release it??  

brianmowrey

brianmowrey

Macrumors 6502.

Taz Mangus said: This seems to be an intermittent situation. I browsed to this website and Using Significant Energy went away. It came back again when I opened a new tab which only had Start Page in it. I close the Start Page tab and it is now showing Using Significant Energy again. And now it just stopped again. Very strange behavior. Click to expand...

How-To Geek

How to fix "this website is using significant memory" on a mac.

What do you do when Safari tells you a website is hogging more than its fair share?

Quick Links

What the "significant memory" warning really means, things you can try that may help, ditch plugins and extensions to speed up safari.

Your Mac only has a finite amount of memory available, so if a process starts to use more than its fair share, the rest of the system can suffer. Sometimes, Safari will warn you that a website is using a lot of memory, but what can you do about it and how do you stop it from coming back?

Your computer uses physical memory, or RAM (random access memory), to store data that needs to be rapidly accessed by the system. The more memory you have, the longer you can go before running out. To make the most of available memory, the solid-state drive is used as a temporary location to " swap " data in and out as required, which is why a Mac with twice as much memory isn't necessarily twice as capable.

Some websites require more system resources than others. This is often the case with complex websites like social media feeds or web applications like Google Docs which handle a lot of data. There also may be scripts running in the background of a webpage that introduce additional overhead.

The "significant memory" warning is an indicator that a tab is asking for a lot of system resources, which may lead to a performance drop. More memory being used by one process means there is less memory available to the system overall. This can result in slowdowns, crashes, and instability.

This warning will only appear above the tab causing the issue, so you may need to cycle through tabs if you suspect a web page is causing your computer to perform poorly.

The easiest remedy is to refresh the tab in question. This should force Safari to reallocate resources, freeing up any memory that's tied down and removing the warning. Unfortunately, a problematic website is likely to keep asking for more resources and so the warning can come back.

Safari splits tabs up by process in Activity Monitor (accessible via Spotlight or under Applications > Utilities). Access the "Memory" tab then arrange the "Memory" column by descending to see which processes are using the most memory at the top. You can quit any webpage process to force a reload.

You can take the more drastic route of quitting Safari altogether (using Command+Q or simply right-clicking on the dock in the icon). If Safari has become unresponsive you may need to force quit the process to restore performance.

Sometimes warnings such as these can be caused by problems rendering a webpage as a result of an outdated browser. Install any available updates for Safari under System Preferences > Software Update is recommended for both  performance and security reasons .

If the website in question has an issue with Safari in particular, installing and using a second browser like Chrome or Firefox  could be the answer. Safari is a solid choice for Mac users on account of being highly optimized, but it often doesn't enjoy the same support as more popular cross-platform browsers.

If you're seeing this error a lot, you might want to consider upgrading your Mac . If your machine is relatively new, it's likely a problem with the website and you may want to submit a support ticket or seek an alternative. Accessing the website periodically rather than leaving it open all of the time could work too.

Webpages using more than their fair share of resources is an issue that appears from time to time, but there may be more you can do to improve Safari's performance across all websites.

Consider ditching web plugins and removing unnecessary browser extensions  to reduce Safari's overall footprint, freeing up more resources for thirsty webpages and other processes.

safari using significant energy

MacBook Pro 13" Two Thunderbolt Ports 2020

Released in May 2020, the 13" MacBook Pro features quad-core Intel 8th generation Core i5 and i7 processors, and Intel Iris Plus 645 integrated graphics. (Model A2289/EMC3456 with two Thunderbolt 3 ports)

safari using significant energy

Sam @sz1809

Posted: Aug 30, 2020

  • Unsubscribe

Safari - Using Significant Energy

Even when only one tab is opened on Safari browser, Safari shows as “Using Significant Energy”. Is this something to be concerned about? Not sure if this is normal?

Using Catalina 10.15.6 on a brand new MacBook Pro 13”.

Any advice would be appreciated.

Update (08/30/2020)

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Is this a good question?

safari using significant energy

Rep: 478.1k

Self employed contract worker

Posted: Aug 31, 2020

In truth there is little you can do to fix this as its often the web page you’re viewing is forcing your system to run code which is looping and/or has a memory leak.

You still want to make sure you have a good antivirus, malware and spyware apps to reduce your risk of getting infected. Also make sure you don’t have any Safari plug-ins which is causing issues.

Was this answer helpful?

5 Comments:

Any particular Malware and Spyware apps you would recommend @danj ? For antivirus, I use Bit Defender. Any thoughts?

When you state that a web page might be forcing the system to run looping code etc. - would just the Google home page also do this for example? I have no extensions and plug-ins installed at the moment. I notice that even if I simply have the google homepage open on a single Safari tab, it "uses significant energy". What could I do to resolve a memory leak, if that is indeed the problem?

Aug 31, 2020 by Sam

MalwareBites is a good tool to have!

What happens if you just open a empty widow or Apples web site?

As far as looking for memory leaks you have Activity Monitor for that.

Aug 31, 2020 by Dan

@danj Thanks will install MalwareBites. I think BitDefender Antivirus for Mac has been slowing down my system a little - or perhaps I am imagining things. Not sure.

Been noticing some strange behaviour with Safari:

Upon a reboot of the MacBook and when opening an empty window - No apps using significant energy.

When opening www.apple.com - Safari using significant energy.

When opening a blank window after a reboot and a minute or two of browsing - Safari using significant energy.

Posting some screenshots of the Activity Monitor.

@sz1809 - Well you have something lurking inside of Safari !!

Did you add any plug-ins? You do need to run MalwareBites to see if there is something in Safari.

You could also try creating a new user account to see if its reacting the same way.

Sep 1, 2020 by Dan

@danj I ran a scan with Malwarebytes, no threats and PUPs detected. On Safari, I when I noticed this issue, no plugins and extensions were installed. The "Using significant Energy" issue started showing up from the time I used the MacBook when it was brand new last week. I recently installed Bitdefender AV so it has now installed three extensions in Safari which I have not enabled, but even when there were no extensions installed, I noticed this behaviour. I will crate a new user account and see if Safari is behaving the same way. Will update.

Sep 1, 2020 by Sam

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Safari using "Significant Energy"

Even when only one tab is opened on Safari browser, Safari shows as “Using Significant Energy”. I am not watching any video on the tab and this occurs even when the Google homepage is the only one page/tab open. Is this something to be concerned about? Not sure if this is normal?

Using Monterey 12.2 on a brand new MacBook Pro 14.

Any advice would be appreciated.

MacBook Pro 14″, macOS 12.2

Posted on Feb 4, 2022 9:50 PM

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bruno75

Feb 5, 2022 6:38 PM in response to rohith777

Hi there rohith777,

Great question! We'd like to help answer it as best we can.

When we load websites on our own Mac within Safari, we also see this message. It is normal, and of no concern.

We use it as a guideline on which websites may be using more energy than another, in conjunction with how much battery charge we have in our Mac.

If you'd like to submit feedback to Apple about this, you can do so using this link: Product Feedback

COMMENTS

  1. How to Fix "This Website Is Using Significant Energy" on a Mac

    You can see the effects of Safari by opening Activity Monitor (Search for it in Spotlight or find it under Applications > Activity Monitor.). Click on the "Energy" tab, and then click on the "Energy Impact" column to reorganize it in descending order to see the most energy-intensive processes at the top. At any time, you can also click on your ...

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    The first thing you can try and do is simply force quit Safari and relaunch it. Occasionally, it'll just be a buggy website that's drawing resources and a force restart could allow the site to reload and behave normally. Click the Apple logo menu in the upper-left corner. Select Force Quit from the dropdown menu.

  3. How to fix "This webpage is using significant energy" error

    Open CleanMyMac X (download it for free here ). Go to System Junk. Click Scan. The app will detect all of the junk files your system stores and offer the Clean option after the scan is complete. 3. Free up RAM for a faster system. Safari is showing you the "This website is using significant energy."

  4. Safari is "using significant energy" even


    Tonight, I had closed the Safari app early when I noticed that under the battery icon in the top bar, it still showed Safari "using significant energy" for a few minutes after it had closed. And tested a few minutes later, using only one window open iwht a site that doesn't play videos, and the message was back there.

  5. How to prevent Safari banner "This webpage is using significant energy

    Just be aware of that - Safari uses least power to render pages and dynamic content. I have plenty of power to spare on my MacPro that I am willing to throw at it to prioritize performance over energy savings. The irony is, that when Safari pops up this message, the webpage actually slows down and becomes laggy.

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    In this video, I'll address the "Webpage using significant energy" error.👉 Get the free version of CleanMyMac X here:https://bit.ly/3gnKooI Possible reasons...

  8. battery

    I am currently using a 2017 Mac Pro touch bar that is still on Mojave 10.14.6. My safari is consistently shown using significant energy on my menu. In my activity monitor, I noticed there are many apps running behind my safari despite only opening 4 tabs: mailbox, youtube, google and apple stack exchange.

  9. How to Fix "This Webpage Was Reloaded Because a Problem ...

    To enable the menu, click on "Safari" in the top-left corner of the screen then choose Preferences followed by the Advanced tab. Enable "Show Develop menu in menu bar" and return to the webpage in question. You can now use the Develop > Empty Caches menu bar option to delete any saved data causing an issue and try again.

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    After two hours, half my battery capacity has been used--and the battery icon pull-down menu, under "using significant memory" Safari is listed. I turned off pop-ups, but animated ads keep showing up on websites. I made my screen dimmer, drastically curtailed notifications, and other suggested fixes--but I can't turn off wi-fi.

  11. How to fix "Webpage is using significant energy"

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  12. Safari using "significant energy" : r/macbook

    However, when I use safari it claims that it is using "significant energy". This happens with 0 plugins/extensions, only about 3-4 tabs open, and within 5 minutes of the application being active. In the activity monitor, safari has an energy impact between .1 and 2 and a 12 hr power of around 8.

  13. Safari 14 Using Significant Energy

    I have Safari set so that when I launch it to show the Start Page, not the Home Page. I noticed that with Safari only showing the Start Page, not browsing to any websites and not having any extensions installed, under battery it shows Safari Using Significant Energy. I have looked at the preference settings and even looked at the Develop ...

  14. How to Fix "This Website Is Using Significant Memory" on a Mac

    Access the "Memory" tab then arrange the "Memory" column by descending to see which processes are using the most memory at the top. You can quit any webpage process to force a reload. You can take the more drastic route of quitting Safari altogether (using Command+Q or simply right-clicking on the dock in the icon).

  15. Safari

    When opening www.apple.com - Safari using significant energy. When opening a blank window after a reboot and a minute or two of browsing - Safari using significant energy. Posting some screenshots of the Activity Monitor. Aug 31, 2020 by Sam. @sz1809 - Well you have something lurking inside of Safari !!

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    The main issue here is your use of mouseover, which fires once for every pixel that the mouse moves over the element the event is attached to. When combined with an animation this can be very demanding on the system. A better workaround for this would be to use mouseenter instead, which can be achieved with the use of hover(). Even better than that would be to use CSS, but that would require ...

  17. Safari using "Significant Energy"

    This webpage is using significant energy. Closing it may improve the responsiveness of your Mac. How to fix it? Safari goes back one page when loading Sometimes (multiple per day) Safari (15.2) jumps back to the previous pages when loading the new. It seams to happen both when clicking links and typing in the address.

  18. Safari (Using Significant Energy) : r/Safari

    r/Safari A chip A close button. Get app Get the Reddit app Log In Log in to Reddit. Expand user menu Open settings menu. Log In / Sign Up;