I-Firefox Community Forum

• OS: Debian (trixie)
• Firefox version: 149.0b3

Firefox suddenly crashes without any displayed error. Attempt to troubleshoot it in "safe mode" doesn't help (it also suddenly crashes.

• When I had redirected following output: "Exiting due to channel error."
• after restart, I launched "about:crashes", but there were no entries

I've got constant crashes jn last update Firefox 148.0.2 (Desktop). Often it happens when Google Meets launched in browser and i started switch between tabs or another applications. In Widows logs i found this error: Имя сбойного приложения: firefox.exe, версия: 0.0.0.0, метка времени: 0x00000000 Имя сбойного модуля: unknown, версия: 0.0.0.0, метка времени: 0x00000000 Код исключения: 0xc00000fd Смещение ошибки: 0x00007ffce9d07286 Идентификатор сбойного процесса: 0x0x3F64 Время запуска сбойного приложения: 0x0x1DCB6A7BAE6121F Путь сбойного приложения: C:\Program Files\Mozilla Firefox\firefox.exe Путь сбойного модуля: unknown Идентификатор отчета: 1a851f87-1b94-4270-8d86-a6850200a62b Полное имя сбойного пакета: Код приложения, связанного со сбойным пакетом:

Installed system Windows 11

Crash submitted, ID = 320cc808-4505-4cba-6e0f-9f2c2955d007 Still happens in troubleshoot mode. Still happens with extensions disabled (Ublock origin, Proton Pass) Started happening since Dec. 5, 2025 System is current with all Debian?Ubuntu updates installed (daily refreshes) Linux Kernel 6.8 on Lenovo Yoga i7 (ca. 2022) with Intel i5 & Intel graphics

My firefox has been closing while I am away from my computers. I have a few computer running linux (Ubuntu 24.04) and one in mac osx (Big Sur). Usually, I can start firefox and it will remember my tabs which is annoying but still manageable. However, once in a while, (which happened yesterday), all the firefox closed on all the computers and it forgot my tabs when I start firefox again.

I have already set app.update.auto to false on all of the firefox instance prior to this incident to avoid firefox update would close out firefox itself. So if anyone has any idea of what to check to see why firefox keep closing and/or why once in a while it will not remember my tabs, I would really appreciate it.

Hi Mozilla I hav got a problem with Firefox on Kubuntu 24.04.3. Everytime the computer is restarted Firefox crashes the first time it's started. That's not a big problem, starting Firefox again don't take long. But the problems is exceeding. If i start Firefox by clicking a link in a mail in Thunderbird. And Firefox has not yet been started, It crashes, but now it's also invaliding the Task bar on the screen where Firefox was started. Invaliding means that I cannot start apps from that screens taskbar, and the clock has stalled, none of the tools works etc. The only possibility solution I have been able to figure out, is restart (It's like going back to Win 98). Sometimes I am able to start a app from that invalid taskbar. But it's not the one app that i clicked on. Even though I can trigger it via Thunderbird, the invaliding of the taskbar will occur after a while. And I have to restart. I am not sure if this is the right place to post. But Firefox is always involved, but maybe Thunderbird or Ubuntu was the right place? Every time Firefox crashes there is send a crash report to Mozilla, but is has been going on for a while, so i guess that nobody is looking at the crash report. If I use Chromium instead of Firefox I don't see the problem.

I had an issue where my browser disappeared. Here are specifics for my installation.

Name Firefox Version 142.0.1 Build ID 20250827004350 Distribution ID raspberrypios User Agent Mozilla/5.0 (X11; Linux x86_64; rv:142.0) Gecko/20100101 Firefox/142.0 OS Linux 6.12.62+rpt-rpi-2712 #1 SMP PREEMPT Debian 1:6.12.62-1+rpt1~bookworm (2026-01-19)

I relaunched and then restored previous session. After that, I searched open tabs, but when I selected a tab that was reported to be opened,  it was not restored. I went to troubleshooting mode and it worked fine suggesting some issue with an extension.  What, if any logs could I capture to help debug? thanks

Just got my repaired laptop back. Windows Home 23H2 build 22631.6199. Installed Firefox, synched my account. Firefox or a firefox tab have crashed 19 times in the last 3 days since the fresh install.

5 most recent submitted

Report ID Date Submitted bp-d5cc4d87-e2dd-4149-93ec-d91000260401 4/1/2026, 10:39 AM View bp-09b6f228-0b9e-4827-85e7-108df0260401 3/31/2026, 7:43 PM View bp-2edc9f85-37b3-4a37-8a1b-ed6390260331 3/31/2026, 11:03 AM View bp-df98c40c-38d4-4d41-ad0a-104430260331 3/31/2026, 10:59 AM View bp-5a3b7f96-699e-4096-98c4-411ab0260402 4/2/2026, 9:51 AM

Actually crashed while preparing this message. What to do?

my firefox keep crashing when i join google meet and i need to do multitask so i open another firefox windows(private or not) it always crash few second after, i have tried the trouble shoot mode its still crashing, even the new windows from SSO request do trigger my firefox to crash. when the browser crash it does offer me to restore my session

hello Ive been dealing with this constant battle of Firefox working for about a week and then just completely stops randomly. This problem never occurred when i was on windows 10 but ever since i installed windows 11 this has started to happen. If i turn on my desktop and Firefox doesn't work i have to either refresh Firefox through the uninstaller or boot into safe mode and then boot into regular and it will work for a couple days and then stop again its a full on cycle and in tired of dealing with this mess just to keep using your guys browser. I don't want to leave Firefox but it doesn't really leave me a choice unless you guys can help me solve this problem.

hi when I play on facebook june's journey the game starts to crash in several different ways, windows 10 is supposed to start on october but I have been having lots of problems on mine since they send the end agreement notice, I am a 76 grandparent and I am not interested in new changes I am ok with my computer as it is, I've paid for windows 10 when it came out, and i will not pay again for a new one. Appreciate all the help I can get from you and many thanks in advance for your help

Hello,

I would like to report a potential bug in Mozilla Firefox related to recent updates.

After downloading a PDF file and opening it directly in the browser, the tab crashes. Following this crash, it becomes impossible to open any files (regardless of file type) within the browser — every attempt results in another tab crash. The crash report cannot be reviewed, as the tab fails immediately and can only be closed.

As a temporary workaround, changing the default PDF handler to an external application prevents the issue. However, this is not a viable solution for us, since some of our internal systems require PDFs to open directly in the browser after download.

We have verified that this issue does NOT occur in version 148.0.2 — everything works correctly there. However, after updating to version 149.0, the problem reappears consistently. Firefox also automatically updates after synchronization, making it difficult to remain on a stable version.

According to the release notes, there were changes in PDF handling in recent updates, so this may be related to a technical regression.

Could you please investigate this issue or advise on a proper fix or workaround?

Best regards, Daniel Mazur VanityStyle IT Specialist

Hello,

I am experiencing a recurring issue with Firefox on Kali Linux.

Environment:

- OS: Kali Linux (running inside Termux on Android) - Connection: VNC (RealVNC) - Device: Android phone (low RAM) - Desktop: XFCE

Problem: Whenever I open Firefox, tabs frequently crash with the message: “Gah. Your tab just crashed.”

What I already tried:

- Disabled hardware acceleration - Disabled recommended performance settings - Ran Firefox in safe mode - Created a new Firefox profile - Lowered VNC resolution - Restarted the system

The problem still persists.

I believe this may be related to graphics rendering or memory limitations under VNC/Termux.

Please advise if there is a workaround or configuration that can prevent this crash.

Thank you for your support.