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My computer unexpectedly shut down when the power went out. When I try to open Mozilla Thunderbird, it doesn´t respond. Messages appear on the tabs at the top and a dot flashes on one. When I press anything, the text turns gray and the program doesn´t respond. I´ve turned off my computer many times, and that doesn´t help. I´ve also deleted a locked file according to the instructions. The situation is the same in Safe Mode, and it doesn´t help. What should I do now? Thank you!

Hi everyone,

Firefox on my desktop has been crashing frequently, sometimes shortly after opening it and other times while browsing normally. There doesn't seem to be one specific website or action that consistently causes the crash.

I've already tried restarting Firefox and my computer, but the problem keeps coming back.

Has anyone experienced frequent Firefox desktop crashes recently? I'd appreciate any suggestions on what I should check first, especially regarding extensions, hardware acceleration, crash reports, or corrupted profile data.

I'm happy to provide my Firefox version, Windows version, and crash report details if needed.

Thanks in advance for any help!

Firefox browser opening and closing on it's own, rapidly opening multiple windows at once, over the top of all other open pages on my computer. I've restarted my computer, run a virus scan, cleaned my keyboard (no stuck keys), unplugged all extra things (web cam, mouse), nothing seems to work. I use Chrome and Firefox simultaneously for different things, and have never had an issue before.

Hi, My Firefox crashes when alt tabbing into it from a 3D accelerated fullscreen application. Sometimes I am able to just close Firefox, most of the time the only thing helping is a complete system restart.

Hardware is an AMD Ryzen 5800X with a Radeon 6900xt and 32Gb of Ram. Windows 11 and the graphics drivers are up to date.

Firefox itself does not seem to recognize the crash and does not have any logs of it.

Copiolet tried to hep me with many different ways. I am locked out of Thunderbird they said I could be frozen and tried to unfreeze it but that did not work Nothing is showing I have thunderbird in the downloads

I finally found the solution! With help from my friends at Dell Computers, that is. The crash was due to the C: drive becoming overloaded with data. On advice, I purchased an USB portable hard drive and moved all the data not needed to be on the C:\ drive. It would be nice to have more than "common sense" to decide which files and folders are needed to run the computer nicely. If there is a book or manual that can list this for me, I'd buy it and check regularly. The computer now runs nearly like a new one and I'll be looking for a while before upgrading. Note that USB hard drives are relatively inexpensive, but need to be treated similar to the way most USB drives are (Don't just plug or unplug while the data is flowing). Storing unused files will pay off so that you don't get caught having to clean house at a very busy time. Enjoy...

I've been using Mozilla Firefox browser for the better part of the last two decades, having always found it to be the most functional and useful over all competitors, who generally seem more interested in raising revenue or spewing puerile and slanted politics. I've been accustomed to the occasional "crashes" and always provided input when they occurred, convinced that the interruptions would be brief and with any issues resolved. Today was different.

Lately, my processor was experiencing some "aging" issues: slowdowns, freezing forcing me to re-start, and random re-starts on its own. Over the weekend I conducted a comprehensive series of diagnostic tests of all features of the operating system. To my relief, the system went back to normal and efficient, including the browser -- for about 2 days.

Early today the browser became slow, eventually inactive, and ultimately crashing 7 times. But all these time were different: my input into the "crash warning box" was not permitted and closing the box only resulted with the next crash. All crashes had the same reason posted on their reports: "Crash Reason EXCEPTION_ACCESS_VIOLATION."

When the crashes finally ended, my browser looked totally unlike it did before:

(1) ALL of the shortcuts I entered on the home page and relied upon for years VANISHED. (2) ALL of the browser windows and the open tabs I was working through at the time EVAPORATED. (3) ALL extensions I saved and used routinely GONE.

By the end of the day, one spent trying to resurrect "my" Mozilla browser with minimal damage, something else disconcerting occurred: the processor's operating system randomly shut and re-started. I don't want to point fingers just yet and allege this was connected with my browser failing, but the coincidence is troubling, one I would recommend looking into. My assistance is, of course, automatic.

--Thanks, Steve Saucedo

So, similar to this post but I haven't downgraded, only upgraded.

OS: Windows 11 (26100.8893) Browser: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:153.0) Gecko/20100101 Firefox/153.0

I can load it up in the morning, load all my standard tabs, then not too long into it a tab will 'crash' and require a reload. The reload then says its a dramatic crash and the whole browser needs to restart. Soft or Hard (i.e. "Exit") restarts always then ask to create a new profile on startup. This means I lose so much configuration (settings, etc) that is not in the Account Sync, meaning huge amounts of time have been wasted setting Firefox back up again every day.

When I go to about:profiles I can see all the old and new profiles (recently cleaned up all the old ones).

I do use my FF Account across various versions of Firefox (run a linux OS that still has a 14x version - need to upgrade OS to get more recent, but its a significant upgrade that had previously failed so not high on my 'want to resolve' list) - all the Windows OS's have the latest FF.

URL at time of crash. https://mail.yahoo.com/d/folders/1

Can get very little done in my eMail for www.att.net. Yahoo.com does also crash occasionally.

I've tried reloading my software for ATT.net, Norton.com, Dell.com and others as I went. Reload went okay, Tried several reboots. Still no luck.

Been to various sites for diag info. I have uninstalled antivirus and tried it, no joy. I have done all the following to each folder - compess, repair, deleted old emails, etc. (I actually have rules that are to do this automatically). I have captured config info, uninstalled and installed fresh. Still have the problem. -- and finally restored so I still have email addresses, etc. etc. This problem has started for me with in the past 2 weeks.

1) ALSO note: I am running W11 home. Mozilla keeps calling this W10. I do not know what the difference is between Home and Pro, but I am planning to upgrade to PRO within 2 months (looking for a reasonable deal on the cost of the upgrade). 2) Wife's computer is W11 Pro, she does not have the problem.

- However I think it may be to do with a recent bookmark entry stored in the bookmarks bar?? The website is a national UK hardware store and it seems to open OK. I cannot be sure but I think the problem started after I added this bookmark. It is a real nuisance and I have had to switch to Edge. Please advise how I might fix the problem.

bookmark https://www.radiatoroutlet.co.uk/?gad_source=1&gad_campaignid=1488717521&gclid=EAIaIQobChMIlO36_NLelQMVopdQBh0cygqfEAAYASAAEgL9EPD_BwE

I'm running TB on Windows 11 on a Dell Desktop machine. It's a pretty basic installation with EE Cyber security, which is I think Norton. I've been using TB for a couple of years but recently it has almost stopped working. I notice from Task Manager that TB is massively leaking memory and consuming much CPU time. I don't think I have any add-ons and I only use TB for email. It's now so bad that I'm even unable to go into TB's Settings or Tools or anything else. I've tried creating an exclusion for TB profiles and TB.exe in the Norton. I've tried starting TB in troubleshoot mode but all to no avail. I have it in IMAP, Port 993, SSL/TLS for incoming mail and Port 465, SSL/TLS, Authentication Required for Outgoing mail. I'm currently often unable to even access mail previously downloaded to the local Mail folders, TB is just hanging with the bar in the lower right corner endlessly running along. Most puzzling of all, is that very occasionally is starts working again and then I dare not switch the machine off! It's become an indeterminate system. Please help, I'm nearly eighty and trying to organize my holiday, which is needs email to make bookings. Thanks in anticipation.

I am running Thunderbird on a new Windows 11 laptop. When I download new messages and try and open them my laptop locks up. Anyone else have this problem? Thanks Dave