Oh there's another kind of crash which has different details which is still Firefox:

Fault bucket 120858127557, type 4 Event Name: APPCRASH Response: Not available Cab Id: 0

Problem signature: P1: bad_module_info P2: 0.0.0.0 P3: 00000000 P4: StackHash_0000 P5: 0.0.0.0 P6: 00000000 P7: c0000005 P8: PCH_84 P9: P10:

Attached files: \\?\C:\ProgramData\Microsoft\Windows\WER\Temp\WER888B.tmp.WERInternalMetadata.xml

These files may be available here: \\?\C:\ProgramData\Microsoft\Windows\WER\ReportArchive\AppCrash_bad_module_info_59ea469c9cde70e5cc5fc8dc983f2f16bebbf3_85207d7d_316b9dc8-2545-4aa0-aaf1-6bd37e6187f2

Analysis symbol: Rechecking for solution: 0 Report Id: 3e6821ac-156b-4324-8b15-7cb22e607899 Report Status: 268435556 Hashed bucket: 0758bc351100ecb0a46f1e72d1780692 Cab Guid: 0

Version=1 EventType=APPCRASH EventTime=132272030114369848 ReportType=2 Consent=1 UploadTime=132272087126584038 ReportStatus=268435556 ReportIdentifier=316b9dc8-2545-4aa0-aaf1-6bd37e6187f2 IntegratorReportIdentifier=3e6821ac-156b-4324-8b15-7cb22e607899 Wow64Host=34404 NsAppName=bad_module_info AppSessionGuid=000399ac-0001-000d-2df7-8553b1ecd501 TargetAppId=W:0006acaa5bfefb8fb28575ce89c11a19097600000000!0000655e856b73232ca376ff8704ee12c404878da363!firefox.exe TargetAppVer=2020//02//17:16:15:47!9434b!firefox.exe BootId=4294967295 ServiceSplit=3669488033 TargetAsId=27242 UserImpactVector=808452912 IsFatal=1 EtwNonCollectReason=1 Response.BucketId=0758bc351100ecb0a46f1e72d1780692 Response.BucketTable=4 Response.LegacyBucketId=120858127557 Response.type=4 Sig[0].Name=Application Name Sig[0].Value=bad_module_info Sig[1].Name=Application Version Sig[1].Value=0.0.0.0 Sig[2].Name=Application Timestamp Sig[2].Value=00000000 Sig[3].Name=Fault Module Name Sig[3].Value=StackHash_0000 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=PCH_84 DynamicSig[1].Name=OS Version DynamicSig[1].Value=10.0.18362.2.0.0.256.49 DynamicSig[2].Name=Locale ID DynamicSig[2].Value=2057 DynamicSig[22].Name=Additional Information 1 DynamicSig[22].Value=0000 DynamicSig[23].Name=Additional Information 2 DynamicSig[23].Value=00000000000000000000000000000000 DynamicSig[24].Name=Additional Information 3 DynamicSig[24].Value=0000 DynamicSig[25].Name=Additional Information 4 DynamicSig[25].Value=00000000000000000000000000000000 UI[2]=bad_module_info State[0].Key=Transport.DoneStage1 State[0].Value=1 OsInfo[0].Key=vermaj OsInfo[0].Value=10 OsInfo[1].Key=vermin OsInfo[1].Value=0 OsInfo[2].Key=verbld OsInfo[2].Value=18362 OsInfo[3].Key=ubr OsInfo[3].Value=657 OsInfo[4].Key=versp OsInfo[4].Value=0 OsInfo[5].Key=arch OsInfo[5].Value=9 OsInfo[6].Key=lcid OsInfo[6].Value=2057 OsInfo[7].Key=geoid OsInfo[7].Value=242 OsInfo[8].Key=sku OsInfo[8].Value=49 OsInfo[9].Key=domain OsInfo[9].Value=0 OsInfo[10].Key=prodsuite OsInfo[10].Value=256 OsInfo[11].Key=ntprodtype OsInfo[11].Value=1 OsInfo[12].Key=platid OsInfo[12].Value=10 OsInfo[13].Key=sr OsInfo[13].Value=0 OsInfo[14].Key=tmsi OsInfo[14].Value=193171 OsInfo[15].Key=osinsty OsInfo[15].Value=3 OsInfo[16].Key=iever OsInfo[16].Value=11.657.18362.0-11.0.175 OsInfo[17].Key=portos OsInfo[17].Value=0 OsInfo[18].Key=ram OsInfo[18].Value=16245 OsInfo[19].Key=svolsz OsInfo[19].Value=464 OsInfo[20].Key=wimbt OsInfo[20].Value=0 OsInfo[21].Key=blddt OsInfo[21].Value=190318 OsInfo[22].Key=bldtm OsInfo[22].Value=1202 OsInfo[23].Key=bldbrch OsInfo[23].Value=19h1_release OsInfo[24].Key=bldchk OsInfo[24].Value=0 OsInfo[25].Key=wpvermaj OsInfo[25].Value=0 OsInfo[26].Key=wpvermin OsInfo[26].Value=0 OsInfo[27].Key=wpbuildmaj OsInfo[27].Value=0 OsInfo[28].Key=wpbuildmin OsInfo[28].Value=0 OsInfo[29].Key=osver OsInfo[29].Value=10.0.18362.657.amd64fre.19h1_release.190318-1202 OsInfo[30].Key=buildflightid OsInfo[30].Value=C6A0BBFE-FA2B-4D86-AAB4-FB51F87B459E.1 OsInfo[31].Key=edition OsInfo[31].Value=ProfessionalN OsInfo[32].Key=ring OsInfo[32].Value=Retail OsInfo[33].Key=expid OsInfo[33].Value=RS:4964 OsInfo[34].Key=containerid OsInfo[35].Key=containertype OsInfo[36].Key=edu OsInfo[36].Value=0 FriendlyEventName=Stopped working ConsentKey=APPCRASH AppName=bad_module_info AppPath=bad_module_info NsPartner=windows NsGroup=windows8 ApplicationIdentity=A01ED07A810B640A20A150D57CC9C420 MetadataHash=408632086

Hi Ben Curthoys

Please reply with your crash ids (should start with 'bp-').

You can find details on how to do this from: https://support.mozilla.org/en-US/kb/mozillacrashreporter

Cheers!

...Roland

As I said:

"It doesn't show an error message on screen or create a Firefox crash report - it just vanishes"

There are no records in the Crash Reports folder, and when it crashes, it doesn't show the Mozilla Crash Reporter dialog box. It just exits.

I expect it's an issue similar to this:

https://bugzilla.mozilla.org/show_bug.cgi?id=1579758

I've stopped a bunch of services I don't need and I'll see if that helps.

... update... nope, I've stopped all the services I can and the problem persists.

Never mind, I've reinstalled Chrome and the problem isn't bothering me any more.

Hi Ben Curthoys, sorry to hear that. Please consider filing a bug report if you choose to pursue this in the future: https://bugzilla.mozilla.org/enter_bug.cgi

Cheers!

...Roland