Firefox Community Forum

I am running Firefox 151.0.4 on a Win 11 (25H2) AMD Ryzen 5, 32 GB ram. Every time I close Firefox, it generates a crash report. That takes several minutes during which I can't start a new Firefox window. The crash report says the report was submitted successfully but when I look in about:crashes the reports shows they need to be submitted.

I ran in troubleshoot mode and disabled all plugins and did not see any extensions listed. I restarted and it still crashes. Firefox seems to run fine. But the crashes when it closes are annoying and disruptive.

here are the first few lines of a recent crash report: Firefox 147.0.1 Crash Report [@ shutdownhang | mozilla::SpinEventLoopUntil | nsThreadPool::ShutdownWithTimeout ]

   Search Mozilla Support for this signature How to read this crash report 

You are seeing public data only. See protected data access documentation for more information. Crash ID: c921c76e-8902-414d-aad6-1d4d50260611 Signature: [@ shutdownhang | mozilla::SpinEventLoopUntil | nsThreadPool::ShutdownWithTimeout ]

As I write I am seriously considering walking away from using Firefox and advising all my friends to not use it.

Every time a programme does a update on my desktop, which is several times a week, it crashes Firefox and I get endless messages all day to keep rebooting Firefox.

It is getting extremely aggravating, frustrating and making me very annoyed.

This is supposed to be a modern browser with no big issues, supposedly easier to use than others? not on my desktop it is not and has not been for several months.

Yesterday Firefox started crashing tabs on load of a handful of websites that are seemingly random, like Twitter and a few shopping site tabs I had open. It wasn't after a system update or anything, it just started happening while Firefox was already open and those tabs had already been open and loaded. I've tried clearing my cache, site data, reinstalling Firefox, and it still does it. Upon further investigation, it seems to be something regarding libfontconfig, and mostly specific to users of openSUSE Tumbleweed.

https://crash-stats.mozilla.org/signature/?product=Firefox&signature=libfontconfig.so.1

So for three days now, my firefox constantly crashes. I would be reading a story online or watching a video on Youtube and then it will suddenly freeze. In videos, it'll still play the sound but the screen will freeze. I can't pause or stop it. Then either Firefox crashes and closes or I have to close it for it to stop. Sometimes, when I try opening it again, it still won't open. I used to have 50 tabs open and never ad this issue. After this, I closed all the open tabs, even deactivated a bunch of extensions, run malware detection, and still the issue continues. I don't know what the problem is. I even followed instructions and deactivated hardware acceleration options in Performance. And I have all AI options turned off too. The app also recently was updated.

crash report bp-e455fd8b-e30b-4cdc-811a-346ac0260607

I had this trouble after Firefox's previous update, where the browser would just close as I was in a tab. It had stopped so I thought the problem was fixed. However, it just updated the browser a few days ago and again I'm having a problem where the browser will just close in the middle of me entering information. It does not have to do with which program I am in as it just seems to happen randomly. It does not save any information I've typed in.

I cannot use Firefox without it blowing up my memory to 86GB used in Activity Monitor. I've cleared my cache, closed all my tabs and bookmarked them. I have a Macbook Air M1 2020. I've tried restarting and am definitely using the current version of Firefox. I also updated to the latest OS Tahoe 26.5 to see if that helped. What should I do next please?!

All the tabs, in both my profiles are constantly crashing. I cannot keep at a task for more than a few minutes without needing to restart the tab. Is this a setting problem? I've cleared the cache, and reset Firefox, to no avail. Thank you for any relevant advice and/or assistance.

Since the latest Firefox update, it has frozen the app & crashed my computer multiple times within a few days; it has also caused problems logging into my primary bank account ("access denied") but has nothing to do with the bank (I called the bank; no problems there, but they suggest using Chrome browser. NO WAY!) Every time Firefox has updated the past few months, it has interfered with my password vault’s proper functioning {Last Pass}. I am using a late 2012 Mac mini, running OS 10.15.1 (the newest acceptable OS for my computer). I attribute some of the problem to their adding a number of new features without making certain the basic app is stable.

Responses should be addressed to [edited email from community support forum]

In past 2 days I've experienced Firefox randomly closing all open firefox windows and then bringing them back after a brief delay. There is no mention of an update or other reason while this would occur.

Whenever I try to click the upload button it freezes, it doesn’t even open Finder it just gives me the spinning wheel and then I have to force quit. But strangely if it gives me the option to drag the file it works fine.

I'm on Big Sur 11.7.11 if that helps. I saw a very similar post but it was posted in 2018 by pinwhale.

Hello, I have been experiencing tab crashes while watching MSNOW at 4pm eastern. These have also occurred in troubleshooting mode. I have submitted the error codes and pasted the most recent five here. I also received an error code which to the best of memory stated to possibly reinstall firefox. Any assistance would be appreciated. Regards Bruce Caress

I use Linux Mint and I have been experiencing numerous system crashes involving Firefox which requires a cold boot. What is the problem? How can I debug this? Are you getting crash reports?’

This happens several times a week. It has happened continuously tonight since installing the latest update via the Software Manager.

The program causes a total freeze of the OS. All other running programs and all input sources. I have no choice but to shut down via the power button on the tower.

Mint generates crash reports but I have no way to determine if they are being sent to Mozilla.

Firefox for Linux does not provide a troubleshooting system like it does on Windows. Neither does Mint.

I studied Computer Science in the 80s when Firefox was known as Navigator. I learned C and the Unix OS, but since then I became a psychologist, and don't remember too much of the Com Sci stuff I learned and I don't think Mint allows user modifications anyway.

What can be done to fix this? I don't have the Benjamins to buy a new Windows to replace the Linux, nor do I want to.

I have asked several times, and received no responses that helped. I am continuously hammered with GAH! I've tried everything I've found both from Mozilla, and Google AI, but have had no solutions. What am I missing? If I have to uninstall, then reinstall Firefox, I'm going back to one of the better versions, like 98, or 99, or earlier, which I've got on old HDD's that still function. Thanks to anybody who can offer a real solution.

Tabs will crash over and over again. I can barely look at any given page for longer than a minute or two. What happened?? Firefox was never like this before. It just crashed in the middle of me typing this LMAO. Using Brave in the meantime. This is ridiculous.

YouTube Seiten crashing after a few seconds with Firefox Nightly from 23.05.2026. The build from 22.05.2026 did not have this problem. Right now i did a rollback to the last build to fix this.