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Looking for background on XPCOM_CORE.DLL

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Firefox decided to crash on me today, and threw up this error:

Firefox caused an invalid page fault in module XPCOM_CORE.DLL

I didn't even know there was such a DLL. I searched my system and found 3 different versions of it. Strange info in the file-properties:

Version "Personal" 2/19/2008
Version 2008121709 12/17/2008 (probably the one I was using)
Version 2009041504 4/15/2009

Copyright: License: MPL 1.1/GPL 2.0/LGPL 2.1. Company name is either Netscape or Mozilla. No file description.

Just a fluke, or is there a better (more stable) version somewhere?

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I use Firefox, too. In my Faultlog.txt file I see:

Date 07/08/2012 Time 01:39
FIREFOX caused an invalid page fault in
module KERNEL32.DLL at 016f:bff7671f.
EAX=00d9de00 CS=016f EIP=bff7671f EFLGS=00010212
EBX=0344efbc SS=0177 ESP=0341fff4 EBP=034200c4
ECX=034200dc DS=0177 ESI=8195b844 FS=1d4f
EDX=03420138 ES=0177 EDI=0342022c GS=0000
Bytes at CS:EIP:
ff 75 fc 9d 57 8d bd 30 ff ff ff 6a 04 55 57 e8 
Stack dump:

Date 07/08/2012 Time 01:39
FIREFOX caused an invalid page fault in
module XPCOM_CORE.DLL at 016f:603a1359.
EAX=ffff0120 CS=016f EIP=603a1359 EFLGS=00010a83
EBX=01005f70 SS=0177 ESP=01c0ff24 EBP=01004598
ECX=00000000 DS=0177 ESI=01004570 FS=131f
EDX=00000004 ES=0177 EDI=034423d0 GS=0000
Bytes at CS:EIP:
ff 50 04 57 8b ce e8 e9 01 00 00 53 ff 15 ec 52 
Stack dump:
034423d0 01033d1c 0103281c 01c0ff98 8196d284 ffffffff 6039de1b 01bd5d67 
01033c70 601b52f1 01032810 01001d30 01001d30 8196af70 01033690 601b72bb

Date 02/07/2013 Time 02:00
FIREFOX caused an invalid page fault in
module XPCOM_CORE.DLL at 016f:603b0526.
EAX=09c01000 CS=016f EIP=603b0526 EFLGS=00010206
EBX=00d9f528 SS=0177 ESP=00d9f4f4 EBP=00d9f52c
ECX=000606ce DS=0177 ESI=000606c6 FS=3057
EDX=00061003 ES=0177 EDI=000606c6 GS=0000
Bytes at CS:EIP:
c7 00 01 00 00 00 89 70 04 5e c3 56 8b 74 24 0c 
Stack dump:
04660a94 603b06cf 000606c6 00030362 04660a94 04660a94 603b0d55 00030362 
00d9f528 00d9f524 00030362 04660a94 00000000 00000000 00d9f5c0 603b0dcd
I don't know the cause(s), but it might be when I occasionally run out of virtual memory (swap drive gets full).

xpcom_core.dll: 2008121709
Design feedback requested:
KernelEx 4.5.2015
IHAtool - IpHlpApi tester; call various functions and report results
--status-> framework is solid; 22 api's fully supported; preview release coming soon
Future projects: Kexter - IP40+Ktree+Kexstubs

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