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FireFox Crash Error - Event Name: BEX64

  • 6 svar
  • 1 har dette problem
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  • Seneste svar af FredMcD

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Okay so FireFox was working fine then it just started to crash on its own. It wont even open now. I just re-downloaded the newest version and I get this error ...

Problem Event Name: BEX64

 Application Name:	firefox.exe
 Application Version:	78.0.0.7481
 Application Timestamp:	5ef4dbb9
 Fault Module Name:	firefox.exe
 Fault Module Version:	78.0.0.7481
 Fault Module Timestamp:	5ef4dbb9
 Exception Offset:	000000000001271f
 Exception Code:	c0000409
 Exception Data:	0000000000000000
 OS Version:	6.1.7601.2.1.0.256.48
 Locale ID:	1033
 Additional Information 1:	f1e5
 Additional Information 2:	f1e5046f37a223b79a118bdfd5eab172
 Additional Information 3:	8325
 Additional Information 4:	8325dfc337d75cdd245b20a32aa6ad8b

Any ideas ?

Valgt løsning

It could be the work of one of your add-ons, or it could be Hardware Acceleration.
How to disable Hardware Acceleration {web link}

Type about:addons<enter> in the address bar to open your Add-ons Manager.
Hot key; <Control> (Mac=<Command>) <Shift> A)

In the Add-ons Manager, on the left, select Extensions. Disable a few add-ons, then Restart Firefox.

Some added toolbar and anti-virus add-ons are known to cause Firefox issues. Disable All Of them.

If the problem continues, disable some more (restarting FF). Continue until the problem is gone. After, you know what group is causing the issue. Re-enable the last group ONE AT A TIME (restarting FF) until the problem returns.

Once you think you found the problem, disable that and re-enable all the others, then restart again.

Let us know who the suspect is, detective.
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All Replies (6)

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Hi chris.meister12, sorry to hear about this problem. A BEX error typically refers to an illegal memory access that triggers Windows to kill a program. But it's difficult to know the exact root cause of such errors when both the application and module name are firefox.exe.

A Firefox 78.0.1 update will be released soon and if that doesn't help, you could try some tests along these lines:

(A) Start Firefox in its Safe Mode to rule out add-on issues (steps at the end)

(B) Start Windows in "Safe mode with networking" to see whether Firefox runs better -- this bypasses numerous programs that start automatically

(C) File a bug and let the developers advise on what kinds of logs would be helpful


For (A):

In its Safe Mode, Firefox temporarily deactivates extensions, hardware acceleration, any userChrome.css/userContent.css files, and some other advanced features to help you assess whether these are causing the problem.

If Firefox is not running: Hold down the Shift key when starting Firefox. (On Mac, hold down the option/alt key instead of the Shift key.)

If Firefox is running: You can restart Firefox in Safe Mode using either:

  • "3-bar" menu button > "?" Help button > Restart with Add-ons Disabled
  • (menu bar) Help menu > Restart with Add-ons Disabled

and OK the restart.

Both scenarios: A small dialog should appear. Click "Start in Safe Mode" (not Refresh).

Any improvement?

Helpful?

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Hello,

Yes I can start Firefox while Firefox is in Safe Mode, and while my Computer is in Safe Mode.

Anything I should try next ?

Thanks.

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Valgt løsning

It could be the work of one of your add-ons, or it could be Hardware Acceleration.
How to disable Hardware Acceleration {web link}

Type about:addons<enter> in the address bar to open your Add-ons Manager.
Hot key; <Control> (Mac=<Command>) <Shift> A)

In the Add-ons Manager, on the left, select Extensions. Disable a few add-ons, then Restart Firefox.

Some added toolbar and anti-virus add-ons are known to cause Firefox issues. Disable All Of them.

If the problem continues, disable some more (restarting FF). Continue until the problem is gone. After, you know what group is causing the issue. Re-enable the last group ONE AT A TIME (restarting FF) until the problem returns.

Once you think you found the problem, disable that and re-enable all the others, then restart again.

Let us know who the suspect is, detective.

Helpful?

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BEX errors also have been associated with malware, so you can also do a malware scan.

Do a malware check with several malware scanning programs on the Windows computer.

Please scan with all programs because each program detects different malware. All these programs have free versions.

Make sure you update each program to get the latest version of their databases before doing a scan.

You can also do a check for a rootkit infection with TDSSKiller.


https://support.kaspersky.com/viruses/utility

Helpful?

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Thanks it looks like the Hardware Acceleration was the issue !

Problem solved !

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Glad to help. Safe Surfing.

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