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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.

I started noticing that Firefox was giving me a lot of "not responding" freezes the past couple of weeks. The past couple of days I basically cannot access Firefox at all - constant, immediate freezing. I have tried uninstalling/reinstalling (multiple times), disabling hardware acceleration, running troubleshooter mode (still freezes! if it opens at all!), deleting profiles, restarting my computer, etc. I've done just about everything I can find online about this issue. Nothing has worked. I have no issues with Chrome or Edge.

Any suggestions??

Original FF user here so not a newbie. Run all FF updates on a regular basis. Currently on a MacBk Air circa 2020 running Sonoma 14.7.7 I browse twitter on a regular basis. I run various ad blockers: ABP, Adblocker Ultimate & Privacy Badger. Last month or so I've needed to make some adjustments as maybe the X platform has instituted workarounds or something but suddenly I was seeing ads that looked like someone's post, very deceptive. At one point it was necessary to disable Privacy Badger on twitter/X as there was an interference w what I was seeing. That wasn't that long ago, maybe 2-3 wks? Consequently if I saw an ad I needed to do a "block element" thru Adblocker Ultimate & while it was a bit of a bother that was all fine and good no problem. Again, this was all recent. Tonite was different. An ad appeared and somewhere something got entangled and I had to disable the Adblocker Ultimate. I sent them an email to see what's up. Then I had to disable that on twitter so ads appeared. Next I tried to enable ABP again on twitter to see if maybe since I'd disabled it a couple of wks prior maybe it had been updated and would work ok. This is when things really started to go downhill. It worked but too well - was disabling images from news reports and/or someone's posted video. THEN I noticed my cpu was running a bit loud. I tried to disable/test the ad blockers but my cpu was getting louder so I shut down the twitter website altogether.

That didn't help. I checked the Utility monitor and saw my activity monitor climbing as I heard the fan running louder. SO bizarre! I shut down FF altogether and this calmed down the CPU. Next I opened just a general news site - Al Jazeera - to see what would happen. Within about 2-3 mins the CPU started speeding up again. I closed AlJazeera, and just sat there for a few moments and my cpu calmed down. Opened it again same thing. Began speeding up. That's when I came here to file a report//ask qs because this just doesn't ever happen - literally ever. It is not unusual for me to have both a browser page open w 2-3 windows along w a private window open - maybe mltiple windows there - and NO cpu noise going on. Once more I shut down FF completely before reopening a new window. IF I start browsing a news site - like Al Jazeera, it begins running hot again. Twitter, same thing and now my ad blockers seem to be messed up//not working as well. Right now as I type this I have ABP & AdBlocker Ultimate both highlighted as active; Privacy Badger is showing enabled but no activity, Twitter Video Downloader is just sitting there as is typical unless I need it (it's to download videos off of Twitter, works very well too.) That's all I have for add-ons. Right now in just this window everything is calm and quiet. IF I open a news site tho, or social media, anything w a bit of activity on it everything starts humming louder and louder. I just opened FB for a few moments to see if that creates issues and yes it does w/i maybe 2-3 mins of activity. Also: FF Privacy & Security Settings are on Standard. Not sure what else I can provide but please feel free to ask. I may have left something out. I'm hearing the cpu heat up again so getting ready to just shut things down for the night. Thanks to all who helped build FF - really - and thanks to whoever can help resolve whatever's going on now.

My system froze abruptly while I was browsing on Firefox. Cursor was useless. What should I do if/when that happens again? And how can I prevent the freeze from happening?

I keep having problems with Firefox hanging or disconnecting. I have followed all the steps in the [Hanging] page, and I still have to shut it down and restart it often, sometimes as much as several times a day. I also frequently have to force quit the browser, or I get a message saying "Firefox is open, but not responding" when I try to restart it.

Windows 11 desktop - latest version with previews.

Within the last week or so, my mouse has started moving very slowly within Firefox. I've tried refreshing and reinstalling Firefox (which is up to date) and deactivating all extensions. However, this makes no difference.

If this can't be fixed, I will seriously consider using another browser as my default in Windows (long time Firefox user).

My Dell Precision Laptop from 2019 runs a frequently updated Ubuntu 24.04. About one or two weeks ago, after one of the latest Firefox updates, i noticed that video streaming produces rectangular flickering in rapid sweeps. ( Also fast scrolling large text websites produces similar flickering, I think I would have noticed it before...) . If you detected it once, you see it always again... :-( First I fiddled around with the nvidia settings because the driver was also recently updated, without much success. Playing locally stored videos, e.g. with VLC media player, still works fine, so the nvidia driver is not the problem i think. Yesterday I installed Chromium and the video performance is fine! As good as with firefox some weeks ago! So it must be one of the latest updates, that causes the problem. Generally I like firefox more than chromium. I like the control you have, e.g. via Add ons.. So I hope that the firefox performance will increase again... Thank you for firefox! Florian Mengedoht