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My browser is using 2,3 Gb of extra ram it goes away by restarting but comes back in 5-10 min. It occurs wathing twich, i have tried disabling extentsions but it doesn't work. in about:memory the readout is as thoug it is keaping an extra copy of open browser files in ram.

2,511.83 MB (100.0%) -- heap ├──2,301.00 MB (91.61%) -- committed │ ├──2,016.65 MB (80.29%) ── unused-pages/dirty │ ├────230.75 MB (09.19%) ── allocated │ ├─────32.96 MB (01.31%) ++ bin-unused │ └─────20.65 MB (00.82%) ++ (2 tiny) └────210.82 MB (08.39%) -- decommitted

    ├──210.21 MB (08.37%) ── unmapped
    └────0.61 MB (00.02%) ++ unused-pages

Well I am continuing and repeating my question placed in August 2026, where I found that Firefox V154.x stalled in an erratic way that made it completely impossible to use it or to send a crash report. So your suggestion to send a crash report was not very bright or helpful. I deliberately omitted the subsequent updates, to try again after a main version update. Alas, we have the same situation again in V157.0, this time more predictible. The program stalls immediately after trying to open another tab. And again, you can kill the program only by task manager.

The additional question I have, is how to switch off the annoying update message, as long as Firefox is dysfunctional after an update, I'd like to avoid any update under all circumstances. I have to work with Firefox, so it is more than an leisure thing for me, I cannot afford to cripple Firefox by an unintended update.

I had to reinstall the last known working version (153.03) to send this message.

When I watch YouTube videos, Firefox behaves strangely. After a few minutes of watching, I try to scroll to the comments, and then Firefox starts to lag. Scrolling becomes very sluggish, and the entire image freezes while scrolling. The website stops responding, but the sound continues. The only way to fix this is to minimize and then maximize Firefox. Then I can scroll again and the problem starts again. This problem occurs regardless of whether I clear the cache, use an ad blocker, or which screen I'm using Firefox on. Sometimes, one of my screens even freezes and displays stripes. However, this only happens when I'm using Firefox and YouTube. I have no problems with any other applications for exampmple playing games on one screen and let music streaming app playing on the other screen. Even my Cubase 15 work like sweet on booth screens without errors. Why is firefox acting so strange? Firefox never completly stops or closed itself.

Firefox Version 157.0 (64-bit). AMD Software: Adrenalin Edition 26.8.1. Windows 11, version 26H2 installed October 1, 2026 (previous updates also had the same issue with firefox).

I also got some Firefox Updates when i opened it. I was hoping they catched the issue but it seems like the same.

Have a great day :)

Preferred Firefox for most of my online use in my 82-year career in the ICT space - why has it deteriorated so badly? Am using Chrome for now, works perfectly, doses not freeze up my browsing or simultaneous use like Word or outlook. Should I abandon Firefox and switch to Chrome permanently?

As soon as I start browsing short videos in YouTube Firefox freezes and I have to restart it to continue doing anything. It is very annoying. I have Windows 11 (updated) and Firefox is up to date. I don't use a VPN. I have some extensions installed but it happens with or without them enabled. I use Panda Dome as antivirus (It did not happen when I had Windows 10 and Panda) It does not happen with any other video site

I browse exclusively with Firefox on a Windows desktop. Edge is installed but unused. Even so, Firefox unpredictably starts as many as seven Edge Webview2 processes, which invariably bog the computer down. (Webview2 pops up only when I use Firefox and usually when nothing else of consequence is running; so Firefox seems the likeliest culprit.) Microsoft says that trying to uproot Webview2 will disable many apps and may end civilization. How can I prevent Firefox from invoking Webview2?

This morning, I can no longer download (Save) files to my computer, nor check/change settings in Firefox. Tried all troubleshooting steps to no avail.

If I delete and reinstall Firefox, will I lose all my Bookmarks, etc.? Running version 157.0 (aarch64).

Appreciate any help!

When starting Firefox after a PC startup or restart in Windows 10, Firefox will lockup and exhibit a "Not Responding" message. Windows will then show a "Close Program" or "Wait for the program to respond" choice. This happens on any of my machines, Windows 10 and 11. It's to the point of wanting to uninstall it. After it finally loads the first time it loads fine on subsequent loads.

Ever since the update to 157 I have been having issues when running firefox. Youtube is non functional on the browser. It is using a large amount of memory (consistently at 41-45% according to the task manager). Gmail takes a long time to load, in fact every page takes a long time to load if at all.

I run it in troubleshooting mode and functionality returns... I don't want to run firefox with all my extensions disabled they are there for a reason.

This update seems to be inherently unstable and is causing issues for lot's of folks.

So just to summarize, the update to 157 has not worked. It is using a disproportional amount of memory, that the previous version did not. It is causing my entire system to downgrade and run significantly slower. Pages will not load properly and I am now using a different browser as a work around.

Essentially it is a huge failure and I wish you would have tested more thoroughly. My experiences are not uncommon... You guys released a garbage upgrade to the browser that has catastrophically under performed.

I do not recollect any update in the past that functioned as poorly as this. Congratulations for completely screwing this up.

When will you guys get this working properly?

I got a iPhone 18 Pro Max and installed ios 27. Firefox is extremely laggy now. I alreasy re-installed the latest version of Firefox, but the the problem ist still there.

I also disablwd some funtions like auto fullfilling, but nothing helps.

Firefox just automatically updated and now when playing video while not being the selected window (eg watching a video in the background while doing something else) it plays at a noticeably lower frame rate.

I was using my computer today and everything was working fine, when I closed and reopened Firefox it automatically updated, I have changed no settings anywhere on my computer or in Firefox but when i alt-tabbed to a different window while watching a movie after the update Firefox started playing at a low frame rate.

Any idea what could be happening? it seems to be caused by this latest update.

(I have seen posts from some time ago that seemed to be having a similar problem but the solutions from them do not seem to work).

First the laggy, extremely slow issue was just noticed on YouTube. Now I notice it on Rumble and other sites. For now, I have to abandon Firefox and use an alternative browser. I've stayed with you for years. Maybe it's time to part ways. I really like your browser. But, it has become nearly non-functional for me.

The new Firefox 157.0 update has broken pretty much every video streaming website. I've tried YouTube, Twitch, and Amazon Prime Video. In all cases, the same thing generally happens.

Take YouTube for example. The main page itself is slow to load. And when I click on a video to play, it either fails to load or loads but has horrible stutter. When I open up the Firefox Task Manager, every YouTube page shows it's using 100% CPU.

I've enjoyed using Firefox for years, but I'll be moving on to different browser now.

Hi guys - I am running Firefox 157.0 (aarch64) on a Macmini M2 pro with 32GB RAM .

I am regularly receiving messages that my default browser, Firefox, is the largest consumer of that RAM. This is what I received this morning shortly before my system shut itself down. I did have many files open but noticed that Firefox is consuming 33GB of my RAM. Is this normal?

Overtime android seems to balloon in storage size.

I tried deleting history and data inside the app, it lowered slightly then shot back up.

I does not always go up, seems i can go days or weeks wothout a noticeable increase, my guess it is happens whenever android is managing stored memory on apps, i recently restarted and it grew again.

I have tried remote debugging over usb on a mac and could not find anything taking up any amount of data that would account for this.

I dont really know what to do, i would like to avoid uninstalling the app and manually readding pw thing or gaving to save them to firefoxs cloud save. Eventually i will have to as phone storage is getting very low.

I mostly just watch YT on a regular tab, and browse the web in private tabs. I have ublock , no script, video backgroundplay fix as enabled addons, if any of that helps. None of them had a big memory footprint in remote debug.