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

Nov 16, 2020 9:55 PM in response to sam9502

Edited to add: This looks like it may be an issue with Zoom's web client for recorded videos not playing nice with Big Sur? I started a video and watched in Activity Monitor that over the course of a minute or so, the zoom Safari tab ate more and more memory until Safari killed it at about 6.5gb -- this wasn't happening earlier today under Catalina. So, it's not clear to me whether this is an issue with Zoom, or an issue with Big Sur, or an issue with Safari 14 -- but in any case, there's some kind of runaway memory usage happening.


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I just updated to Big Sur today, and I'm now having the same issue -- I'm watching a recorded lecture video in Safari and the webpage keeps being automatically reloaded while I'm watching. Safari is now unusable for one of my biggest use cases.

Nov 26, 2020 5:39 PM in response to sam9502

I have the exact same issue. So I know it isn't isolated.


I had a message display on Catalina in the past where it says something along the lines of it might be slow because its using significant memory. I always found that very odd and absurd to be frank since I have a 16" top of the line MacBook Pro with more than enough RAM to run a lot heavier applications.


This must be fixed immediately since exams are right around the corner. To make matters more frustrating I have tried every possible work around that I could think of.


Even if you go into terminal and sudo purge, the issue resolves only temporarily and goes right back to committing the same problem.


What is the solution ????


I have posted feedback on Apples site for Safari. But how long would that event take to resolve? I think it will be a while before we see any updates being pushed.



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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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