Safari 14 on Big Sur: How to prevent a webpage from automatically reloading because it was using significant memory?

In previous versions of Safari, only a message banner would pop up informing me that a webpage was taking up significant memory. Under Safari 14, the browser now automatically reloads the webpage without my permission, and there seems to be no way to turn this function off.


I am unable to pause lectures, type notes in another app, and then return to play the recorded lecture without the webpage reloading, causing me to lose my place in the lecture. For my purposes, Safari has become unusable because of this new, automatic reloading. I preferred a message banner appearing on top of the webpage so I could reload at my convenience.


Is there a fix that I can do through Terminal to turn this function off? What can I do?

MacBook Pro 13″, macOS 11.0

Posted on Nov 14, 2020 4:15 PM

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Posted on Mar 4, 2021 1:02 PM

I had the same problem when watching Disney+ I tried a few different things but finally seemed to have stopped it happening.

I monitored the memory use of the Disney+ tab in Activity monitor.


Under safari > Settings for this website - I turned off "Content Blockers"

I am running Ghostry Lite - so I "Trusted the site"

I am running AdBlock - so I added www.disneyplus.com to the sites allowed to show Ads.


If I do the above and play Disney+ in a separate window the memory usage fluctuates but doesn't grow like it used to. Previously I would get the warning when the tab used around 2.0GB memory. Now it stays between 650Mb-850Mb





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198 replies

Apr 17, 2021 3:03 AM in response to arnuuv

If this is some type of new feature for Big Sur there needs to be a way of turning it off or managing it. Presently I have a series of large (20-25 Gb) video files to upload to a customer's Vimeo site. I keep getting kicked off. I don't mind if the system slows down or even holds it's place, but a total turn off and re turn on does absolutely no good to an upload file. I then have to start all over again.

Apr 22, 2021 6:27 AM in response to Gregory Jones1

I went backwards on my MBP and it did not help. I kept Big Sur on my iMac. Is it an apple problem or something else? I tried Chrome and Firefox with no solution. I went back to my videos (20 Gb) and lowered the size to about 6-7 Gb and then had no problem uploading to Vimeo. However, I am not sure where the problem lies as I thought that Vimeo was able to take 4K videos ( no mine were not). Some of the larger files had actually been accepted but it was hit and miss and very time consuming.

Apr 22, 2021 9:06 AM in response to MartinAS65

MartinAS65 wrote:

Well, too true, the power does not rest with the minions. On top of which, most of us are not deeply versed in the techy aspects. Actually we should not have to be. Does one need to know all about the workings of a car, boat or plane to use and appreciate them???

Your analogy of «a car, boat or plane» would seem to more properly correspond to your web-browser.


In this case, your web-browser is working properly (more-or-less, at least).


The problem, on the other hand, would, then, correspond with the roadway/highway, or waterway, or runway (and/or the weather conditions).


Your browser («car, boat or plane») is indicating that there is something wrong with the website (the roadway/highway, or waterway, or runway [and/or the weather conditions]).


Just as with «a car, boat or plane», you are not responsible for the conditions of the roadway/highway, or waterway, or runway (and/or the weather conditions).


However, except in the case of the weather conditions, you have a right to bring the issues up with those responsible for the website. In the case of the «plane» in adverse weather conditions, you’ll need to take appropriate mitigating actions.

Apr 22, 2021 9:21 AM in response to Halliday

i appreciate your explanation but in this case, the Safari is behaving like a pampered car. Imagine i upgrade my car model and the new car behaves like this - if the road gets too bumpy, the engine will stop, and it will kick you out of the car. Then, please start the drive again and if the road gets bumpy again, repeat.


When that happens, what do you think i will do? Repair the road or get a different car?


ps: when i said manage the website, i meant manage how the browser deals with the website, apologies for being unclear

Jun 1, 2021 5:50 AM in response to sam9502

This is an ongoing problem many of us have had and now, with the update to the Mac OS (11.4) and Safari (14.1.1) it has reared its ugly head again. Apple must be aware of it but just doesn't care! It's clearly a Safari thing because Chrome and FireFox do not do this! I have just given up on Safari. Maybe they (Apple) use this to encourage us to use their Apple TV and other products instead of other streaming services like xfinity or zoom! I guess Apple isn't making enough money and needs to pull tricks like this! Come on Apple, use some of that billions in revenue to fix this!

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Safari 14 on Big Sur: How to prevent a webpage from automatically reloading because it was using significant memory?

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