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The last few versions of Firefox (since about v52), I have tried to run the 64-bit version of the browser since I have a Windows 7 x64 machine. Firefox 32-bit has always run well on my computer for the last few years but I'd like to switch.

When I double-click Firefox to start it, it starts (shows up in running processes) but closes within 1 second before any UI even shows up on screen. I don't know how to find the culprit. This is what I've tried:

  • Disable any security software (I don't have much; only a firewall)
  • Uninstall and reinstall FF 64-bit
  • Uninstall FF 32-bit
  • Reboot the PC
  • Start FF 64-bit in safe mode (by holding shift while I launch it)
  • Move or rename my profile folder
  • Use the offline (full) installer from download.mozilla.com

I don't know what else to try. There is no error message. The installation seems to complete fine but when I launch the browser, the process just exits.

Any thoughts?

2017-10-08

I've just tried FF 56 64-bit but ran into the same problem. I've also tried to start FF 64-bit from the command line without success:

firefox -safe-mode
firefox -ProfileManager
firefox -CreateProfile testprofile
firefox -P "testprofile"
firefox -headless

It always crashes immediately. I used Nirsoft's AppCrashViewer to take a look at the crash report and saw this:

Version=1
EventType=APPCRASH
EventTime=131519792389108198
ReportType=2
Consent=1
UploadTime=131519792389264199
ReportIdentifier=**REMOVED**
IntegratorReportIdentifier=**REMOVED**
Response.type=4
Sig[0].Name=Application Name
Sig[0].Value=firefox.exe
Sig[1].Name=Application Version
Sig[1].Value=56.0.0.6478
Sig[2].Name=Application Timestamp
Sig[2].Value=59cab571
Sig[3].Name=Fault Module Name
Sig[3].Value=StackHash_f982
Sig[4].Name=Fault Module Version
Sig[4].Value=0.0.0.0
Sig[5].Name=Fault Module Timestamp
Sig[5].Value=00000000
Sig[6].Name=Exception Code
Sig[6].Value=c0000005
Sig[7].Name=Exception Offset
Sig[7].Value=000000006ffe150a
DynamicSig[1].Name=OS Version
DynamicSig[1].Value=6.1.7601.2.1.0.256.27
DynamicSig[2].Name=Locale ID
DynamicSig[2].Value=1033
DynamicSig[22].Name=Additional Information 1
DynamicSig[22].Value=f982
DynamicSig[23].Name=Additional Information 2
DynamicSig[23].Value=f982514d3a20e62867484206e395a99a
DynamicSig[24].Name=Additional Information 3
DynamicSig[24].Value=3a8f
DynamicSig[25].Name=Additional Information 4
DynamicSig[25].Value=3a8fed7ce9e72a7f9314d43de4ce5f60
UI[2]=C:\Program Files\Mozilla Firefox\firefox.exe
UI[3]=Firefox has stopped working
UI[4]=Windows can check online for a solution to the problem.
UI[5]=Check online for a solution and close the program
UI[6]=Check online for a solution later and close the program
UI[7]=Close the program
LoadedModule[0]=C:\Program Files\Mozilla Firefox\firefox.exe
LoadedModule[1]=C:\Windows\SYSTEM32\ntdll.dll
LoadedModule[2]=C:\Windows\system32\kernel32.dll
LoadedModule[3]=C:\Windows\system32\KERNELBASE.dll
LoadedModule[4]=C:\Program Files\Mozilla Firefox\mozglue.dll
LoadedModule[5]=C:\Windows\system32\dbghelp.dll
LoadedModule[6]=C:\Windows\system32\msvcrt.dll
LoadedModule[7]=C:\Windows\system32\VERSION.dll
LoadedModule[8]=C:\Program Files\Mozilla Firefox\MSVCP140.dll
LoadedModule[9]=C:\Program Files\Mozilla Firefox\VCRUNTIME140.dll
LoadedModule[10]=C:\Program Files\Mozilla Firefox\api-ms-win-crt-runtime-l1-1-0.dll
LoadedModule[11]=C:\Program Files\Mozilla Firefox\ucrtbase.DLL
LoadedModule[12]=C:\Program Files\Mozilla Firefox\api-ms-win-core-timezone-l1-1-0.dll
LoadedModule[13]=C:\Program Files\Mozilla Firefox\api-ms-win-core-file-l2-1-0.dll
LoadedModule[14]=C:\Program Files\Mozilla Firefox\api-ms-win-core-localization-l1-2-0.dll
LoadedModule[15]=C:\Program Files\Mozilla Firefox\api-ms-win-core-synch-l1-2-0.dll
LoadedModule[16]=C:\Program Files\Mozilla Firefox\api-ms-win-core-processthreads-l1-1-1.dll
LoadedModule[17]=C:\Program Files\Mozilla Firefox\api-ms-win-core-file-l1-2-0.dll
LoadedModule[18]=C:\Program Files\Mozilla Firefox\api-ms-win-crt-string-l1-1-0.dll
LoadedModule[19]=C:\Program Files\Mozilla Firefox\api-ms-win-crt-heap-l1-1-0.dll
LoadedModule[20]=C:\Program Files\Mozilla Firefox\api-ms-win-crt-stdio-l1-1-0.dll
LoadedModule[21]=C:\Program Files\Mozilla Firefox\api-ms-win-crt-convert-l1-1-0.dll
LoadedModule[22]=C:\Program Files\Mozilla Firefox\api-ms-win-crt-locale-l1-1-0.dll
LoadedModule[23]=C:\Program Files\Mozilla Firefox\api-ms-win-crt-math-l1-1-0.dll
LoadedModule[24]=C:\Program Files\Mozilla Firefox\api-ms-win-crt-multibyte-l1-1-0.dll
LoadedModule[25]=C:\Program Files\Mozilla Firefox\api-ms-win-crt-time-l1-1-0.dll
LoadedModule[26]=C:\Program Files\Mozilla Firefox\api-ms-win-crt-filesystem-l1-1-0.dll
LoadedModule[27]=C:\Program Files\Mozilla Firefox\api-ms-win-crt-environment-l1-1-0.dll
LoadedModule[28]=C:\Program Files\Mozilla Firefox\api-ms-win-crt-utility-l1-1-0.dll
LoadedModule[29]=C:\Windows\system32\ADVAPI32.dll
LoadedModule[30]=C:\Windows\SYSTEM32\sechost.dll
LoadedModule[31]=C:\Windows\system32\RPCRT4.dll
LoadedModule[32]=C:\Program Files\Mozilla Firefox\nss3.dll
LoadedModule[33]=C:\Windows\system32\WINMM.dll
LoadedModule[34]=C:\Windows\system32\USER32.dll
LoadedModule[35]=C:\Windows\system32\GDI32.dll
LoadedModule[36]=C:\Windows\system32\LPK.dll
LoadedModule[37]=C:\Windows\system32\USP10.dll
LoadedModule[38]=C:\Windows\system32\WSOCK32.dll
LoadedModule[39]=C:\Windows\system32\WS2_32.dll
LoadedModule[40]=C:\Windows\system32\NSI.dll
LoadedModule[41]=C:\Windows\system32\IMM32.DLL
LoadedModule[42]=C:\Windows\system32\MSCTF.dll
LoadedModule[43]=C:\Windows\system32\nvinitx.dll
LoadedModule[44]=C:\Windows\system32\Shell32.dll
LoadedModule[45]=C:\Windows\system32\SHLWAPI.dll
LoadedModule[46]=C:\Windows\system32\ole32.dll
LoadedModule[47]=C:\Program Files\NVIDIA Corporation\CoProcManager\detoured.dll
LoadedModule[48]=C:\Program Files\NVIDIA Corporation\CoProcManager\nvd3d9wrapx.dll
LoadedModule[49]=C:\Windows\system32\SETUPAPI.dll
LoadedModule[50]=C:\Windows\system32\CFGMGR32.dll
LoadedModule[51]=C:\Windows\system32\OLEAUT32.dll
LoadedModule[52]=C:\Windows\system32\DEVOBJ.dll
LoadedModule[53]=C:\Program Files\NVIDIA Corporation\CoProcManager\nvdxgiwrapx.dll
LoadedModule[54]=C:\Windows\system32\guard64.dll
LoadedModule[55]=C:\Windows\system32\fltlib.dll
FriendlyEventName=Stopped working
ConsentKey=APPCRASH
AppName=Firefox
AppPath=C:\Program Files\Mozilla Firefox\firefox.exe

2017-10-12

Today I discovered that FF 64bit will actually run within Sandboxie, the security program that creates a container around software as they run so they don't alter your system. I have tried to uninstall Sandboxie and reinstall FF 64bit, but it just keeps crashing if I try to run it outside the sandbox. Trying to right-click + run as admin actually goes far enough to show a crash notification:

  Firefox has stopped working

  Problem signature:
  Problem Event Name:   APPCRASH
  Application Name: firefox.exe
  Application Version:  56.0.0.6478
  Application Timestamp:    59cab571
  Fault Module Name:    StackHash_f982
  Fault Module Version: 0.0.0.0
  Fault Module Timestamp:   00000000
  Exception Code:   c0000005
  Exception Offset: 000000006ffe150a
  OS Version:   6.1.7601.2.1.0.256.27
  Locale ID:    1033
  Additional Information 1: f982
  Additional Information 2: f982514d3a20e62867484206e395a99a
  Additional Information 3: 3a8f
  Additional Information 4: 3a8fed7ce9e72a7f9314d43de4ce5f60

2017-10-13

I've completely uninstalled FF (both 32 and 64bit) and deleted the Mozilla folder in AppData. I've also tried to delete leftover registry keys. I then install Firefox 64bit Portable and tried to run it... same results :-(

  • Download Firefox installer from this Mozilla FTP website. Open both installer with 7zip. Run it with a new user profile for each Firefox. – Biswapriyo Aug 14 '17 at 4:04
  • Was v54 64-bit OK? I haven't seen a v55 update alert (nor anything in the "About Firefox" dialog) yet. Also confirm where you downloaded v55 from. – user3169 Aug 14 '17 at 6:12
  • @user3169 v55.0.1 has been available for several days and v55.0 for longer. – DavidPostill Aug 14 '17 at 11:14
  • @DavidPostill I didn't say it wasn't. – user3169 Aug 14 '17 at 17:04
  • @user3169 I wrote in the OP that I've had this problem since around v52. 64-bit FF will start but close within about a second (before the UI even shows up on screen). I've never actually successfully used 64-bit FF on this machine, though 64-bit versions of other software run fine generally. I downloaded v55 from download.mozilla.org – BeetleJuice Aug 15 '17 at 2:42
0

Go to

C:\Users\YourUser\AppData\Roaming\Mozilla

Erase the folder Firefox (Warning will erase everything)

Firefox should start normally.

  • I will try that this weekend. I'm curious though: why do you think this would affect just the 64bit FF? 32bit works fine. – BeetleJuice Oct 13 '17 at 12:55
  • 1
    This made no difference Jose. Thanks for the suggestion. – BeetleJuice Oct 15 '17 at 3:10

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