Firefox Community Forum

Hi,

I recently updated Firefox to the latest version on Windows 11, and since then the browser keeps freezing randomly while browsing. Sometimes it becomes unresponsive when multiple tabs are open, and I have to force close it.

For example, yesterday I was checking a food site with the Dunkin Donuts Menu, and the browser completely froze when I tried switching between tabs. I already tried clearing cache, disabling extensions, and even refreshing Firefox, but the issue still comes back.

Has anyone else experienced this problem after the recent update? Any guidance on what else I can try would be appreciated.

Thanks in advance.

Dear Firefox Support,

Since yesterday, I’ve been experiencing an issue where the entire browser randomly freezes for a few seconds. When this happens, everything stops — I can’t open or close tabs or windows, and I can’t type in the address bar. If I’m typing something when it freezes, the input seems to be stored in the background and then appears all at once after about 5 seconds, when the browser becomes responsive again. All add-ons are disabled, the computer has been restarted, and the latest version of Firefox is installed. This issue started just yesterday — before that, everything was working perfectly. No new programs were installed, and all other applications on my system are functioning normally. When I switch to Chrome, there are no issues at all. Thank you for your help.

Best regards, Peter

Watching CNN on Youtube suddenly freezes the tab. Randomly. Freezing means nothing can be done. The video simply stops without reloading or buffering. The mouse reacts, the pointer will activate ie highlight a button under the mouse, but when I click a button nothing happens. The tab freezes and nothing can be done. I can't even access the URL or search box. Nothing. I tried moving the tab itself or into another browser window, nothing. This tab is dead. Opening the same video in a new tab works like normal. I tried the usual things like deactivating Bitdefender, but no luck. Any ideas?

Macbook Pro using Tahoe 26.0.1; desktop freezes when Firefox 140.3 is active. Desktop icons do not work. Firefox has to be shutdown for the desktop icons to work.

I use both Firefox and Google Chrome. My mouse works fine with Chrome but with Firefox there are frequent long delays (60-120 sec.) when moving from one web site to another. The mouse just freezes up and I have to struggle to close Firefox. No problem with the mouse with Chrome, but I prefer Firefox and its features. Any suggestions?

I am using Firefox on my MacOS Tahoe. There is a persistent annoying issue where whenever I close (physically fold) my laptop screen and reopen it, Firefox will be frozen. It will be frozen in the sense that I am unable to interact with any tabs or anything until I manually quit Firefox and reopen it (which automatically reopens all my tabs), making it usable again. This doesn't happen every time I close and reopen my Mac, but it definitely happens the majority of the time and makes the browser hard to use.

I've attached a screenshot of what a new window looks like when Firefox is frozen. It looks just like a Firefox window when unfocused.

Notes:

• It doesn't entirely freeze Firefox. In fact, I can "switch" to a different tab by clicking on the tab and then shutting and reopening my laptop again. The new tab will show on reopening but Firefox will still be frozen. This process can be repeated.
• I can pretty consistently replicate the bug by shutting my laptop, waiting 10 seconds, and reopening it. This will almost always result in the freeze.
• The bug still happens if I'm not focused on the Firefox window but on a different app.
• The bug doesn't seem to happen if I just lock my screen but don't shut it closed.

Things I've tried that haven't fixed it:

• Updating my OS.
• Restarting my laptop.
• Disabling hardware acceleration.
• Disabling themes and extensions.
• Deleting and reinstalling Firefox, including deleting the user data in the "Library/Application Support" folder.

Let me know if there's any more information I can provide or fixes I can try. Also let me know if I should go ahead and file a Firefox bug report for this. Thank you.

The NY Times home page has taken to​ animating many of their illustrations. I would like to prevent that; they​ sometimes cause Firefox on my Windows 11 system to freeze for​ periods of varying length, and I simply don't want them. Their helpbot suggested restarting FF and clearing the cache, both​ proved useless. Changing the setting in Firefox to block audio & video has no​ apparent effect. Videos still play from the NYT page and the browser​ still freezes. Is there a way?

Firefox opens full screen on my main monitor, one of three, but not the last-opened and before resizing to its last-used location and size. This three-stage process happens in a instant, interfering with live activity on my main monitor besides being really annoying. Hasn't always behaved this way. Any suggestions?

Thanks, Mike

Firefox 144.0 64 bit

Hello,

we are currently experiencing high memory usage issues with Firefox on our terminal servers.

Problem description: All employees work within a terminal server environment. When using web applications such as Vimcar (https://fleet.vimcar.com) in Firefox, we observe a very high RAM consumption. A single Firefox tab can consume 2 GB of RAM or more after being open for several hours. As a result, the terminal server becomes slow or unresponsive, and other users on the same server are affected. Since the terminal server allocates resources on demand, a hanging process continues to request memory until it eventually terminates itself, which severely impacts overall system performance.

Questions: 1. Are there settings or configuration options to reduce Firefox’s memory usage in terminal server environments? 2. Are there recommended best practices for running Firefox with memory-intensive web applications on terminal servers? 3. Is it possible to set memory limits per tab or per user session to improve stability?

Thank you very much for your assistance.

Firefox prevents going into hibernate mode. It only appears to blank screen until mouse is moved or lid moved. This happened on 3 year old dell and now on new lenovo. I've gotten around it by going into task manager and killing firefox before hibernating. This doesn't happen on a newly opened window. I've noticed that as you use it, in the task manager, (not sure of correct term) the amounts of firefox tasks/threads? increases but does not decrease when tabs are closed. Eventually hibernate stops until I kill the firefox program. I thought this might go away with new lenovo with twice the ram, but happens at same rate. If I forget to kill firefox, I end up with a dead battery. This doesn't happen with edge or other browsers I've tried.

For the past few months, I have had a problem with my computer - it seems to try to write to a hard disk (sounds like whirring ) and the keyboard freezes up for a few minutes, when whirring in the computer stops. I have taken the computer to Geek Squad two times and they said they found it, but it still happens.

I have just tried Google Chrome and Microsoft Edge and I haven't noticed it. Is this a problem with Firefox or just coincidence?

(My laptop is very slow. I have cleaned the cashe, performed disc cleanup, cleaned the memory, and everything i can think of. I opened task manager and see that multiple instances of Firefox open. (photo #1) I have uninstalled and reinstalled to no avail. I have also tried changing the preferences to 1 instance, but it wont allow me to. (photo #2) Please help.

Hello,

I tried to use the Cascade window feature on Firefox but its not working, other applications are working fine, I have attached * Screenshot of error* Raw Data and Text. I did not try to check when i installed first but its not working now. I also have not reinstalled it yet.

Windows ver. 10 Pro 22H2 (OS Build 19045.6456) Firefox ver. 145.0 (64-bit)

Please help and thank you. Best Regards, Alootikki

I just got the profiles update and I'm having a lot of issues with firefox, but I'm not sure what I did wrong. When I change windows both too and from firefox, the menu pops up. As I continue to use it, my controls slowly begin to change. My scroll wheel changed from moving up and down the page to the same command that happens when you go backwards or forwards using the buttons in the top left. I lose the ability to use the windows key on my keyboard. Eventually, I lose the ability to type entirely sometimes, so all the keys from the keyboard just stop working, even though it's plugged in and recognized. Also, if I have firefox open for too long in the background, I'm unable to tab out of whatever window I'm presently in, even if firefox is just running in the background.

I've isolated the problem to just firefox by using other browsers like edge and chrome. While having both of these programs on in the background or during regular use I saw no issues with my pc.

I've tried the main trouble shooting steps provided by firefox, but none have helped. I also thought maybe some of the extensions were causing problems so I stopped using all the ones not from firefox directly, but this also didn't help. I still have the container extensions on.

I think I'm on the latest necessary windows 11 update, but maybe need to go to 25h2? I'm just guessing at this point.

What am I doing wrong with the new update and how do I use the profiles properly so I don't have these issues?