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Not sure what seems to be happening after going through the usual list of troubleshooting. I've run it in troubleshooting mode, none of my very few extensions seem to be causing the issue since it crashed during that test too. I've cleared my cache, I've made sure it's up to date, I also turned off hardware acceleration. I even tested my RAM to make sure it wasn't that.

At this point I have no idea what the problem is, and have even less idea how to fix it.

I have had to give up trying to use thunderbird as it constantly hangs for ages or completely freezes and is frankly unusable. Tried both the system and flatpack versions and it is the same.

Is this a known issue and are you doing anything about it?

It looks good if only it would work!

Can you offer any advice?

Geoff

PS full version is 1.153.6.0esr+linuxmint1 but the dialog box will not accept it.

Since 2 day when I attach a document always unknown software aception (0xc0000417)on place Ox00000000501

NVIDIA Systemsteuerung nicht gefunden pops up I dont wont KI on my computer

I'm running 153.6.0esr on Windows 11. I recently signed up for Fastmail (using IMAP) and since adding that account, Thunderbird crashes ~90% of the times I open it - just perma hangs before it can ever show all my mailboxes. This is curious because I have a different IMAP account (different email provide) that has never caused this behavior. Starting in Troubleshoot Mode doesn't help.

I tried checking off "Check for new messages at startup" on that account, but whenever I try to load Thunderbird, I can see it stuck (in UI text at the bottom) checking Fastmail servers...

Occasionally I get lucky and Thunderbird does load ok, I can then use it ok. But even in that case when it can load, *sometimes* it loads my Address Book, but sometimes it thinks my Address Book is empty.

Fastmail would only advise me that I might have a corrupt Thunderbird profile. Fine, I guess I'll try making a new profile, but I have a few questions:

1.) What might have caused this corruption? Clearly it was something about adding a new Fastmail account (whether Fastmail specific or not). Is it possibly something to do with Address Book? Is there some other fix I should try?

2.) Even if a new profile works, how do people usually deal with importing other old accounts? I have a number of big old POP accounts and I need to have all that email around to reference. Do I just try copy and pasting those mailboxes into the new profile?

Thanks.

I’ve tried restarting my phone, closing everything out, updating my phone etc, and the crashing keeps happening. It occurs on different webpages, in different places etc, and I can’t figure out how to stop it. It only started after I downloaded the latest update.

On Thursday 3rd September 2026 Firefox stopped working. I tried lots of things to get it to work to no avail. Today, 8th September 2026, I had already deleted the Firefox that was already on my PC so I downloaded a fresh copy from the Firefox website and installed it. It ran perfectly for about 30 minutes then I shut it down. 5 Minutes later, a Firefox crash report appeared which I duly sent of. Checking Event Manager a string of error messages saying the same thing, Its the XUL.DLL file that keep crashing! This was the same file that caused the failure last week. I had made sure that XUL.DLL was not on the pc when I downloaded Firefox today. When I click on the Firefox icon it open but stays on a black lower half of the screen and boxes at the top, white lined but black and transparent lines moving left to right across them, eventually it fails and closes, after a few minutes it send the crash report. Its a shame because I have used Firefox for many, many years and now having to use Edge!!!!

I am sick & tired of Thunderbird email crashing. It has got so bad that I can only answer one message before it crashes again. It is useless at the moment. Help please.

Cześć Problem polega na tym że Firefox nie potrafi przejść do końca logowanie do różnych stron przez Google . Pojawia się ekran wyboru konta idziemy dalej a nagle Firefox się zawiesza. To samo na Chrome działa bez p problemu. Jest to uciążliwe.

I cannot get Thunderbird to launch. It acts like it is stuck on perhaps one account and circles keep spinning as if it never can get a few of my tabbed emails open. It keeps saying it "isn't responding." Since this began happening a few days ago, I've stopped the Thunderbird task through Task Manager, I've shutdown and restarted my whole system multiple times, I've updated to the latest Windows platform and made sure my drivers were all up to date... I can't update my thunderbird (if required) because I can't get in in the first place. I have hundreds of emails in multiple accounts under my current Thunderbird. I can't afford to lose all that history. I don't know which version I'm using because, again, I can't get the desktop app to launch. What do I do?

My email on Thunderbird no longer loads on my laptop. It's fine on my desktop. It just stays a blank screen. "No message found" it says. I have to shut it down and when I do it says "Thunderbird is not responding." Can you give me a step-by-step on how to fix this?

Hi,

I use Thunderbird for Android, version 24.0. It downloads emails and attachments just fine, but whenever I try to use it for more than about three minutes, it will crash and say "Thunderbird is not responding", and I get sent back to the main screen.

I have Android version 16, One UI 8.5. How can I share my logs with you? Thanks.

--Justin M.