I-Firefox Community Forum

Summary - Firefox crashes repeatedly. yesterday, I decided to switch to Firefox after using Chrome for a while. it worked fine and I synced my data from Chrome. today, at some point I noticed Firefox is no longer open in my taskbar. I decided to reopen it - it crashed. since that moment it has never worked again. I tried launching it in safe mode (firefox.exe -safe-mode), didn't work. tried reinstalling it, didn't work. manually deleted the files from C:\Program Files and AppData, installed Firefox again, didn't work. reinstalled gpu drivers, didn't work. sfc /scannow-ed, you guessed it - still crashes. what else could I possibly try? please help.

os: Windows 11 Home Firefox source: https://www.mozilla.org/en-US/firefox/all/desktop-release/win64/

p.s. this was posted through an android phone but the problem only occurs on windows

Please tell me how to resolve this issue. The 3 reports I have submitted from the crash window are:

Crash ID: bp-4107d3db-4280-445b-a0cd-e96400251020 [10/20/2025 2:43 PM (Pacific)] Crash ID: bp-b5e0bbf3-d4f6-4b2a-898a-f56960251020 [10/20/2025 2:40 PM (Pacific)] Crash ID: bp-975fcb26-5886-492f-8253-e37820251020 [10/20/2025 2:39 PM (Pacific)]

Firefox accounts renamed Mozilla accounts - What you need to know

i am using fox to open the zoom , but is not working

firefox doesnt start and gives me this error If i uninstall the have a fresh, install, everything will work normally until i restart my pc

AvailablePageFile: 13664788480 AvailablePhysicalMemory: 20233519104 AvailableVirtualMemory: 138533665595392 BackgroundTaskMode: 0 BuildID: 20260116091309 CPUMicrocodeVersion: 0xa50000d CrashTime: 1769253421 HeadlessMode: 0 InstallTime: 1768730212 LastStartupWasCrash: 1 ModuleSignatureInfo: {"Mozilla Corporation":["firefox.exe","xul.dll","gkcodecs.dll","nss3.dll","mozglue.dll","lgpllibs.dll"],"Microsoft Windows Software Compatibility Publisher":["msvcp140.dll","VCRUNTIME140.dll","VCRUNTIME140_1.dll"],"Microsoft Windows":["wsock32.dll","DWrite.dll","textinputframework.dll","dbgcore.dll","dbghelp.dll","version.dll","CoreUIComponents.dll","CoreMessaging.dll","ktmw32.dll","WinTypes.dll","propsys.dll","uxtheme.dll","dwmapi.dll","kernel.appcore.dll","windows.storage.dll","ntmarta.dll","CRYPTBASE.dll","wldp.dll","ntasn1.dll","ncrypt.dll","msasn1.dll","profapi.dll","KERNELBASE.dll","ucrtbase.dll","bcryptPrimitives.dll","gdi32full.dll","win32u.dll","bcrypt.dll","msvcp_win.dll","wintrust.dll","cfgmgr32.dll","crypt32.dll","user32.dll","oleaut32.dll","shlwapi.dll","advapi32.dll","msvcrt.dll","imm32.dll","ole32.dll","rpcrt4.dll","shell32.dll","kernel32.dll","SHCore.dll","ws2_32.dll","gdi32.dll","sechost.dll","psapi.dll","combase.dll","msctf.dll","ntdll.dll"]} ProductID: {ec8030f7-c20a-464f-9b0e-13a3a9e97384} ProductName: Firefox ReleaseChannel: release SafeMode: 0 SecondsSinceLastCrash: 899 StartupCacheValid: 0 StartupCrash: 1 StartupTime: 1769253421 SubmittedFrom: Client SystemMemoryUsePercentage: 40 Throttleable: 1 TotalPageFile: 37688152064 TotalPhysicalMemory: 34198491136 TotalVirtualMemory: 140737488224256 UptimeTS: .1135774 Vendor: Mozilla Version: 147.0.1 Ce rapport contient également des informations techniques sur l’état de l’application lors du plantage.

I wanted to refresh Firefox. When I downloaded the installer from the Mozilla website, I got this message: "Firefox is already running, but is not responding. The old Firefox process must be closed to open a new window." I finally downlaoded it from the App store and now I get this message "Your Firefox profile cannot be loaded. It may be missing or inaccessible."

I can't recollect doing anything lately that would have caused such a problem. I don't mess with the registry, and I don't use rogue programs. I do have a Surfshark VPN, which I disabled to download the latest version of Firefox.

I am running Windows 11 on a Dell PC, which is about 6 months old.

I didn't have any problems until reciently.

How can I fix this?

I can't open FIrefox. When I try to open it I get the following error message. "Firefox is already running, but is not responding. The old Firefox process must be closed to open a new window." I opened Task Manager and could not find any instance of Firefox or Mozilla running. I uninstalled Firefox and deleted all the files and folders having to do with Mozilla and Firefox. Then I reinstalled Firefox. I continue to get the same error message. I am running Windows 11 64bit on a Dell laptop. Any suggestions? Ray

Hello,

Recently, (past month or so) I have had difficulty opening Firefox on my PC. Found suggestion of renaming the .exe which did work, but now it will not open AT ALL. Uninstalled, and re-installed. nothing. Renamed .exe. Nothing. It will OPEN as admin, but cannot access any settings or browse. I am at a loss, and really do not want to go back to Chrome.

Previously attempted uninstalling ESET antivirus and Defender, and still would not open.

Thank you!

-Tim

Hi,

I have a laptop with an AMD Ryzen 7 8845HS CPU, including a Radeon 780M iGPU, running Ubuntu 24.04. In order to fully utilize the GPU by supporting OpenCL acceleration I installed the additional drivers by: `sudo amdgpu-install --usecase=graphics,multimedia,opencl --opencl=rocr --opengl=mesa`

After that programs which benefit from OpenCL acceleration recognize the GPU, however firefox starts crashing with the following error msg:

XPCOMGlueLoad error for file /usr/lib/firefox/libmozgtk.so: libwayland-client.so.0: failed to map segment from shared object Couldn't load XPCOM.

It seems that the AMD GPU drivers registered their libraries in `/etc/ld.so.conf.d` as 10-rocm-opencl.conf, 20-amdgpu.conf which means that libraries within the given folders are found first.

This applies to the libwayland-client library, which is used by `/usr/lib/firefox/libmozgtk.s`:

ldd /usr/lib/firefox/libmozgtk.so | grep amd libwayland-client.so.0 => /opt/amdgpu/lib/x86_64-linux-gnu/libwayland-client.so.0 (0x00007013767bf000)

Interestingly the same `libmozgtk.so` library is used by thunderbird:

ldd /usr/lib/thunderbird/libmozgtk.so | rg -i amd libwayland-client.so.0 => /opt/amdgpu/lib/x86_64-linux-gnu/libwayland-client.so.0 (0x00007d44b0f41000)

However thunderbird just works fine, so I expect that there might be something wrong with firefox utilizing this library.

Maybe I should also mention, that I'm not even using wayland as desktop compositor, but good old x11:

echo $XDG_SESSION_TYPE x11

Is there any way to further debug this issue?

After installing Firefox on a new Windows 11 computer, when I click on the Desktop icon, a Firefox window opens but it doesn't open previous Tabs and the Application menus does not work. I can open new Tabs though and it downloads websites. If I click on the Firefox icon on the Windows Taskbar, Firefox operates normally.

Why doesn't the Desktop icon start Firefox so it works correctly?

Thanks

Wayne Carpenter

ich habe probleme firefox zu starten wenn ich den browser öffnen will erscheint die meldung das firefox nicht geöffnet werden kann weil er noch geöffnet ist obwohl er aber geschlossen ist ich habe schon versucht den laptop neuzustarten und Firefox neu zu installieren es kam immer die selbe meldung der laptop verwendet Windows 7