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I've just opened one simple Web site (in addition to Mozilla), and already CPU usage sits at about 20%! Please refer to my recent posts here at "Why is Firefox Suddenly Taking Over my CPU?" for the problem description. I'm re-posting simply in hopes that I can "send data" on this one from outside my sandbox. Regards -- jclarkw

Hello,

I’m experiencing a serious issue after updating Firefox to version 150. Since the update, Firefox frequently freezes and crashes, making it almost impossible to work normally.

My laptop has 16 GB of RAM, and I’m using Windows 10. When I check Task Manager, I can see that Firefox’s memory usage suddenly increases to around 7–8 GB, then drops back down to around 3–4 GB. The memory usage keeps fluctuating heavily.

Also, the number of Firefox processes/tabs in Task Manager keeps increasing, and eventually the browser becomes completely unresponsive.

Could you please investigate this issue and let me know how it can be fixed?

Thank you.

Oto moje szczegóły odkąd założyłem sobie aplikację Yes zalogowałem się miałem problem z logowaniem dłuższy czas Nie mogłem odzyskać hasła jak przychodziło mi hasło i zmiana hasła to znów hasło nie odpowiadało następnym urugowaniu i tak w kółko i w kółko już mam dosyć tego jakiś błąd macie w systemie Czy aplikacja jest przeglądarki jest do kitu

Anyway to fix the issue?

Name: Firefox Version: 150.0.1 Build ID: 20260427221700 Distribution ID: canonical-002 User Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:150.0) Gecko/20100101 Firefox/150.0 OS: Linux 6.8.0-111-generic #111~22.04.1-Ubuntu SMP PREEMPT_DYNAMIC Tue Apr 14 17:13:45 UTC OS Theme: Yaru / Yaru Multiprocess Windows: 1/1 Fission Windows: 1/1 Enabled by default Remote Processes: 11 Enterprise Policies: Inactive Google Location Service Key: Found Google Safebrowsing Key: Found Mozilla Location Service Key: Missing Safe Mode: false Memory Size (RAM): 31.1 GB Disk Space Available: 383 GB

When watching twitch and I open another tab, the new tab is very slow to open a web page and sometimes wont open at all just keeps scrolling. Any suggestions how to solve this problem?? I tried with Opera and it doesnt have that problem?? Dont want to give up on Firefox as I like it the most. Any help much appreciated.

BR

Mika Nyqvist

As title, The tabs will suddenly no response somehow, whatever the network condition is good or bad, pull to refresh the page is useless at that moment, in android platform

Windows 10 B650M PG RIptide WiFi (BIOS 3.5) Ryzen 5 7600 RTX 2060 Super (driver 596.36, output to LG C1 over HDMI at 4K 120Hz with certified cable) 16GB DDR5

This issue has been happening for about 1-2 months.

When Firefox is open on my computer, my cursor will randomly lower its frame rate to a very low number, probably below 15 FPS. It doesn't matter what I'm doing, just having Firefox open, even in the background, causes this to happen. No such issues in other chrome-based browsers with or without hardware acceleration enabled. I have disabled all extensions and still encounter the problem.

Disabling hardware acceleration does fix this issue, but then the web, and even high resolution videos, become laggy or choppy as a result. Which is very uncharacteristic for my system, because I remember it being quite snappy in software mode on the my same CPU in the past. So something seems to have gone wrong in recent months that makes acceleration in general poor, with or without hardware acceleration on.

FIREFOX ... MMMMMMMMMMMMMMMMOOOOOOOOOOOOOOOOORRRRRRRRREEEEEEEEEEE THAN 16 GIGABYTES WITH ONLY 4 TABS OPENED. AND OF COURSE .... BROWSER FREEZES, NEED TO KILL FIREFOX TO STAR WORKING AGAIN ....

WHAT ARE YOU SMOKING THESE DAYS?

Firefox has been my default browser on Mac IOS for several years. I update Firefox regularly, the last being several days ago. I've recently had problems with Firefox freezing as I sometimes manually log-in to Amazon. All other tabs are affected. I have to quit, reopen.

  It is now affecting my purchases on Amazon.  I'm asked to provide a security code from my bank to complete the purchase. The code is initially accepted, but quickly the purchase is rejected by Amazon. Both Amazon and my bank said that there were no blocks on my account.
  I subsequently went to Safari, where I have no problems whatsoever with Amazon. Amazon has not asked me for a bank code to domplete the purchase.
  I think the problem is in my Settings, but it all looks okay. Cookies are cleared. Suggestions are appreciated. Thanks

Today Firefox has suddenly started using ~20% of my CPU capacity, causing my cooling fan to run high most of the time. Since I had been running Firefox v.149.latest, I tried updating to v.150.0, but that made no difference.

It's not Firefox by itself (only Task Manager open) but whenever I open another tab with almost any website (including this one) that CPU usage spikes. What gives?!

Details: Running under Windows 10 Pro (yes, I have installed the ESU package, good until thi8s fall) on a Lenovo P1 Gen 2. Currently running Firefox inside a Sandboxie Pro v1.17.4 sandbox.

Please Help! -- jclarkw

Since latest update when trying to view pages with artwork on them I get a message that the page is slowing down Firefox and asks me if I want to stop the page to speed up the browser. I do not want to stop the page so I click the X, but Firefox refuses to load the pages at all anyway! I can no longer view many sites due to this issue. Please get rid of this awful code! Thanks.

Been using Firefox for over a decade. But lately is has become so slow now. Often freezes up if more than two tabs are open or a website is in any way very complex. What settings and issues should I check? What has changed? I can run the same sites on Brave and Edge browsers with no issues or not nearly as slow and bogged down.

Hi, Sometimes I would be browsing on Firefox, then I would need info from another app for instance, then when I get back to Firefox, the page always appears white (see attached). Consequently, I would not be able to see the notifications area and the info below the shortcut icons (see attached screenshot). I would not have this occur in the night mode. Thanks

When the screen rotates, many videos freeze and thereafter all videos become unresponsive (and even some elements of the Firefox UI stop responding to taps) until the application is closed and restarted. I have experienced this problem for at least a year now. Reddit is a repeatable example: going to any feed (such as r/popular with videos), playing one, and rotating the screen.

I turned off all battery and CPU optimizations for Firefox, which improves performance on videos somewhat, but does not resolve this issue.

Hello, I'm on Firefox Nightly 152.0a1 running on a freshly installed new Windows 11 version. I've used Firefox exclusively for my whole life and everything has always been smooth until a few days ago. Firefox started (and continues) to freeze for a second or two pretty regularly, each time I use the search bar for example, open a new tab, while a page is loading (which is very slow at the moment) but also scrolling on a page for example. During the freezes, the temperature of my CPU also increase by approximately 20°C. CPU usage in task manager shows that it is quite high, 10x higher than Edge that I opened for comparison only : https://i.imgur.com/enuMMZl.png.

I have sought the internet for advice but nothing changed this behaviour. I updated my computer through Windows Update, my drivers through Driver Booster, I disabled hardware acceleration on Firefox, I removes all AI components with zoicware/RemoveWindowsAI on GitHub, I changed dom.ipc.processPriorityManager.backgroundUsesEcoQoS on about:config to false but nothing cured the problems.

I'm out of solutions and I don't know if I should be waiting for another Nightly build (usually there's about 1-2 a day but 152.0a1 is sticking since a few days and there isn't any update available since, seemingly), if there's others energy economy parameters I could play with on Windows 11 that I don't know about or if something else is in the way. Any help very appreciated, thanks!

I recently upgraded from Ubuntu 24.04 to 26.04, using Mate Desktop and Compiz compositor. I am using Firefox from the Mozilla Team PPA, currently 150.0.1. I am running custom kernel built from upstream source, currently 6.18.25. Hardware is a home brew CoffeeLake machine, i7-9700k, 64G of RAM, 2TB WD Black SSD and many TB's of spinning rust, graphics is Intel ARC B50 Pro, ASUS XONAR SE 5.1 Channel 192kHz/24-bit Hi-Res 116dB SNR PCIe Gaming Sound Card. Prior to upgrading Firefox was not 100% occasionally tabs would wedge, now if I get two hours I'm doing good, I've tried disabling extensions and plugins no help. Tried with and without hardware decoding, worse without but bad no matter. Any suggestions how to get stability back?