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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.

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.

Search bars are stuttering and videos audio is running twice at the same time, sometimes three times over top one another so garbled up you can't understand the audio. When I type in duckduckgo search or any web page search bar, it happened on Chewy, & Walmart, search bars also. Example: (Search: MetallicaMetallica JamesJames Hetfield ) Everytime I hit space bar it adds the same word again.

Hello,

After updating to,

150.0 (Build #2016155439), 1a6c5c6f11fca486436075d92fd82d51f706c775 GV: 150.0-20260415192539 AS: 150.0.1 OS: Android 15

I have been having issues with the address on top of my phone (Motorola Edge 50 Neo).

As you can see, as soon as I switch from Private Browsing to Normal Browsing, the address bar on the top shifts and never goes back to its original position.

It only resets back to its position when I close the App and open Firefox again but the issue persists whenever I try to switch from Private browsing to Normal browsing (vice-versa).

Everything is gone from the browser today. There is no content in the menu at the top right, except for keyboard shortcuts. When I type in the search bar, nothing happens, and clicking the + to open a new tab does nothing either. My account is still showing at the top, I am signed in and the profile looks fine. I can't "refresh" the browser from the menu, as that is not an option.

UPDATE: FIXED - Today, April 13 - everything is back - I guess Firefox fixed itself.

I have a problem with 'efficiency mode' in Windows 11. Windows 11 forcefully puts many of Firefox's tasks into efficiency mode marked by green leaves within task manager in processes tab. It doesn't seem to do this to anything else except Steam Client WebHelper. My Laptop is always in max performance mode in all possible settings as it is always plugged in (this does not influence efficiency mode). It slows down performance making things take longer to load and might even break them. If you try to enable efficiency mode on a task it even warns you of this: 'Efficiency mode will lower process priority and improve power efficiency but may cause instability for certain processes. Do you want to continue?' There is no way to permanently disable it. Currently out of 19 tasks 8 are in efficiency after I woke up my laptop from sleep (I have 5 tabs open). Only way to stop it is to manually disable each one by one (right click on each task and disable efficiency mode). But Windows 11 will turn them back on automatically usually within a few seconds (it seems to depend on opening new tabs, reloading them or waking up the PC from sleep mode). From looking it up online there seems to be a way to disable it in browser on Edge and Chrome but that might be something else (I do not use the so I'm not sure). There was a solution for Chrome but it doesn't work on Firefox.

Is there any way this can be disabled permanently through Firefox or Windows 11?

I've just now noticed that whenever I open the website hxxps://www.hex-rays.com it will hang without finishing loading for a couple of seconds, then the entire browser will freeze. I've already tried on a new profile, verified that no addons or plugins are installed there, and no DLLs hooked into the process. This happens on my physical PC and in an (almost unused) VM, with an ancient version 134.0 and the latest 149.0.

Can anyone else replicate this? Should I create a bug report?

Hi, I use a website called Slickdeals which has a lot of thumbnail photos showing the product on the homepage.

Firefox seems to have a problem with it where Chrome does not.

Scrolling fast throws it off...the screen turns white and I have to wait for the images to load. Also, the scrolling tends to get choppy while using my touchpad scroll.

I've tried disabling hardware acceleration, disabling smooth scrolling, and clearing cache/history.

Sometimes the cursor lags about a second from the arrow to the hand pointer on links to click.

I have fast FIOS internet and a laptop with 16 GB RAM.

Thanks!

In 2024-25 Microsoft Edge gained the ability to limit the usage of physical RAM that the processes uses. Once that limit is reached tabs are put to sleep or are unloaded. So a user of Microsoft Edge could restrict the memory usage to say 1GB or 2GB or 3GB and so on till the maximum available physical RAM.

Does Firefox have such an ability? Is there some flag or settings in about:config that can be enabled for a similar feature to be used? Does Firefox have ability to put tabs to sleep once SWAP is started to be used? Is there some flag or settings in about:config that can be enabled for a similar feature to be used?

If none of one of the above is not available with Firefox then will Firefox add this feature as part of the browser in the future?

Recently, my Samsung A23 5G started freezing when closing tabs. I only started having this issue since Firefox updated to a new version with a new UI. I am currently on 147.0.3 on both devices. I load one tab, close it, load another, and then it usually freezes on the next close. Clearing the cache often allows me to go a couple more tabs without freezing, while simply closing Firefox still usually has the limit of two tabs before freezing. I usually just press "close app" when the "Firefox isn't responding" system box comes up. I've restarted my Samsung phone but the issue persists. My new Moto G Stylus 2025 doesn't freeze, but Firefox still feels noticably slower, especially when closing tabs.

I've uploaded three screenshots. The first one shows how it freezes while I close a tab, while the second shows how Android's "not responding" message comes up. The third one shows the current version on both of my phones.

I have a two monitor setup. Since I installed the new AMD driver (26.1.1), sometimes when I play a game on my main monitor, and watch stream on Twitch in Firefox on my second monitor, it can cause the PC to freeze completely. I hear the sound, but the image is stuck.

I tried to disable the hardware acceleration in Firefox, and it seemed like a good solution. But because of that (which is its function), sites became laggy.

Is this a Firefox, or an AMD issue? Or Windows (I'm on Windows 11 25H2)? I will try to install an older AMD driver, but honestly streams had became laggy before the driver update for me.

После включения ПК бывает, что я не могу ввести текст в браузере.(как буд-то включается режим только для чтения, что не позволяет текст ввести). горячие клавиши работают, но текст не вводиться только в браузере. Оно само по себе проходит. Как это исправить?

Hi, I'm on Firefox 147.0.3 and windows 11 business 25H2 (26200.7623), with two displays. For the past few weeks: - firefox stays on top - alt-tab to other window on that screen doesn't work, other app is not displayed over firefox - clicking on other app icon in task bar doesn't bring it to foreground/top - even other firefox window (like new private window) is opened in background - the only way around is to minimize firefox - without firefox opened, everything works normally It is really disturbing my flow / ways of interacting with apps / habit of using keyboard to move between apps.

Is it a bug, or is it a matter of some settings? I've seen similar quesiton from 9 years ago https://support.mozilla.org/en-US/questions/1140245 but there is no setting of the same name now?

Since a while, I think it is since I created an extra testprofile with "firefox-esr -P", but I've set my main profile as default again

When opening a link in another program than firefox I get always: a popup "Close Firefox" "Firefox is already running, but is not responding. To use Firefox, you must first close the existing Firefox process, restart your device, or use a different profile."

I do have both firefox and firefox esr, I usually use regular firefox the second came with the debian 13 repository.

I keep the esr to test display issues for reproducibility on my personal desktop, because I manage debian 13 kiosk-style desktops with firefox-esr.

(I noticed also that the regular firefox profiles can not be opened in firefox esr, so I use an extra profile for esr)

Top bar reappears after page scrolled down, preventing further scrolling, but when releasing finger at the top of the screen the bar completely disappears and doesn't come back.

149.0a1 (Build #2016141823), 62b991cbf35038109ba97ee21e4de10476194d9a GV: 149.0a1-20260203210813 AS: 149.20260203050225 OS: Android 16

On updating to linux mint 22.3 - cannot type anything in firefox in address box, search and primary password or anywhere else within firefox - have uninstalled & reinstalled but nothing happens