Komunitné fórum Firefox

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.

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

Mine can be perfectly fine after a fresh restart, then after a few days with a bunch of tabs open it starts getting sluggish.

Closing a bunch of tabs helps, but I’m wondering if there’s something else going on. Curious what other people have experienced.

Hi.

My laptop keeps freezing and I suspect Firefox is the reason. It's rather new, I have had it for about a month and half.

I initially thought it was a Windows update issue and updated it but after some experiments I noticed it only freezes when Firefox is open. It doesn't freeze when another browser is used or when am playing video games.

I am currently on Ubuntu and it still happens. It's really annoying and because of this I am still keeping my old laptop. Yesterday for example it happened at least thrice.

when i use firefox browser it is lagging too much even if its youtube,chatgpt or a react web app i try to run locally it is lagging very very much when i use other browser there is no issues i really liked firefox and dont prefer to switch, what should i do

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).

This computer works fine with Firefox, but on my other one it opens to Sorry, we're having trouble getting your pages back. I don't want them back. But Ok, I'll go along with you. Try Start New Session: just buffers. View Previous Tabs? Can't remove the checks. Just buffers. I end up either shutting it down myself through Task Manger (no other way works) or waiting for the popup that Firefox isn't working, what do I want to do? I can't close it with the X. Restarting and shutting down then turning on the computer again didn't do any good.

I had this problem a few months ago, but not as severe. Hard booting worked, and as long as I specifically exited Firefox at the end, with the drop down menu, I could use Firefox. Now I can't use it on my other computer, which is where I prefer to work. I have to use something worse.

When I use Firefox, everything feels slow. Videos pause and stutter often. Pages take a long time to load. I have cleared cache and restarted the phone but it is still happening. Please help me fix this so it works properly again."

When I use Firefox, everything feels slow. Videos pause and stutter often. Pages take a long time to load. I have cleared cache and restarted the phone but it is still happening. Please help me fix this so it works properly again."

Bonjour, depuis la dernière mise à jour, quand je me mets en mode plein écran, ma barre des tâches reste présente et seulement sur firefox . J'ai déjà essayé de désactiver accélération materielle et tout le tralala de l'intélligence artificielle à tester mais rien n'y fait . Si je reviens en mode normal sur une vidéo et remettre ensuite plein écran au bout de 2 ou 3 tentatives, la barre s'éfface mais c'est assez ennervant à faire alors que depuis plus de 20 ans cela n'était jamais arrivé . D'autres personnes on rencontrés ce problème de puis la dernière mise à jour de firefox? Je répete que sur opera,brave et edge le problème est inexistant

So normally firefox uses a reasonable amount of ram but sometimes the amount of ram usage almost doubles, then if I try to change tabs the program freezes. I then have to wait for firefox to stop using the excess of ram and return back to normal levels.

I believe this mainly happens when I have youtube or reddit open but I have no idea how to fix this.

I have already tried reinstalling firefox and deleting/changing extensions. The current extension i have on is adguard adblocker and no others.

Firefox under Linux Mint 22.3 Cinnamon, will not let me input text. How can I get past this?

I am having to type into a text file, copy and paste to get information into a text box in Firefox.

Firefox runs real slow when I changed screens. Sometimes many seconds, things just quit working screen goes blank.

Sometimes it goes to wrong screen. I do not know how to reinstall or update. I would like to talk to a person I am old. I have no technical ability at all. I am confused by all instructions online. Please help me

MAC Platform:

             OS:   macOS Taho 26.5.1

Computer: MacBook Pro 16-inch 2021

                    Chip:  Apple M1 Pro (Silicon)
                    Memory:  32GB LPDDR5 (Hynix manufacturer)
                    Graphics:  Apple M1 Pro  GPU Built-In Bus, - 16 Total Cores, Vendor Apple, Metal Support: Metal 4
                    Model Identifier:  MacBookPro18,1
                   Model Number: Z14Z00109LL/A
                   Total Number of Cores:  10 (8 Performance and 2 Efficiency)
                   System Firmware & OS Loader Version:  18000.120.36
                   Activation Lock Status:  Enabled
                   Internal Storage:  SSD 4TB Capacity ;  File System APFS; Free 2.12 TB
FireFox for MAC:   Version 15.1.0.3 (aarch64)

Firefox MAC freezes intermittently , will get spinning beach ball and status shows Firefox (Not Responding) and must force quit FF.

Sometimes FF after fresh down load from the official FF site for MAC will work great for an hour or half a day and then out of now where go into the spinning beach ball , and unable to enter data into any field - completly bricked and FF status shown as Not Responding. Tnis could happen immediately, or after an hour or anytime within a day or two.

No way of deciphering or determining what in the heck triggers it or why - way way too many factors and settings and variables both within the FF registry and the macOS and the activity I may or may not be doing at any given time.

I will say I experienced this when all apps on my MAC were shutdown, no apps up and running, but I do use Backblaze, Mai Backup X, Malwarebytes, Dropbox, MS NTFS Tuxera, DriveDX which all have ongoing background tasks running all the time or at least in the background from time to time.

However, I have used this setup for the last few years with Firefox MAC with absolutely no hiccup whatsoever.

And then immediately after the last FirForx update on Tahoe, just before I applied the latest 16.5.1 Tahoe upgrade is the intermittant freezing with FF started.

Could this be a FF / Tahoe incompatibility issue?

If not, does anyone out there have anything to fix this?

And yes i did a complete uninstall of all of FF hidden Library folders as well as the "firefox.app" itself - if anyone tells me to uninstall all the hidden FF folders and files in ~/Library one more time, then forget it, I am done using FireFox. Been there and done there a number of times the last week, exhausted with that, and doesn't do a thing.

And yes kept deleting and creating new FF profiles and did not fix the issue.

So does some great genius Mozzilla FF Mac SW engineer have any clue as to the real issue and the real fix without sending me on a wild goose chase?

thank you. clb6

Hello there,

I realized that quite often when I restart Firefox (Developper Edition) and restore my previous session (latest occurence with 46 tabs), the window becomes invisible. It still exists, and I can even see it in the Window menu list pointing to my latest tab but it's nowhere on screen. I can add/navigate through/select/remove tabs using the keyboard, I can see them listed on screen when I Ctrl-Tab but the whole window remains invisible.

It'd be great if someone could help me out.

Best regards,

Emmanuel

9/19/2026 Firefox Version 156.0 (64-bit) for windows 11 up to date with Windows Updates. I often have 2,3,4 Firefox windows open, each with several tabs open. Sometimes, Firefox will just totally freeze, and I can't do anything more. ALL Firefox open windows and tabs freeze. Other windows/apps are fine, and working normally. Only Firefox seems to be affected. The only thing I can do is use Windows to totally close/end the Firefox application. It then closes all the Firefox windows. I can then reopen Firefox, and everything seems fine - but I have totally lost the open windows and tabs I was on.

This has happened across several Firefox updates. I do not think this happened prior to 2026. Maybe just since June 2026.

One Extension - Web Threat Shield

Thanks!

I have version 156.0 (64 bit). It seems like the freezing started soon after the update and it is getting worse. Tonight it is only unfreezing for less than a minute. Some of the extensions showed that they needed permissions updated. Since I could not figure out what they did, I disabled them. None mentioned cursor control or issues that looked like they were nothing but options.