Thanks for the extra files. I do concur that Firefox is playing a role in all the crashes. Just look how many times it was the process running at the time of the crash. You also have Kaspersky running as your AV program. If you continue to get problems I would try removing this for a while to see if it helps.
Built by: 19041.1.amd64fre.vb_release.191206-1406
Debug session time: Sat Feb 20 20:45:01.692 2021 (UTC + 0:00)
System Uptime: 0 days 0:03:06.316
BugCheck 139, {3, ffffab0eb5268730, ffffab0eb5268688, 0}
Probably caused by: ntkrnlmp.exe ( nt!KiFastFailDispatch+d0 )
BUGCHECK_STR: 0x139
PROCESS_NAME: firefox.exe
¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨``
Built by: 19041.1.amd64fre.vb_release.191206-1406
Debug session time: Sat Feb 20 20:22:04.370 2021 (UTC + 0:00)
System Uptime: 0 days 0:13:25.994
BugCheck 13A, {8, ffff800cad010100, ffff800cb75a2c70, 0}
Probably caused by: dxgmms2.sys ( dxgmms2!VIDMM_RECYCLE_HEAP_MGR::DestroyMultirange+2923e )
BUGCHECK_STR: 0x13a_8
PROCESS_NAME: firefox.exe
¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨``
Built by: 19041.1.amd64fre.vb_release.191206-1406
Debug session time: Sat Feb 20 14:45:57.404 2021 (UTC + 0:00)
System Uptime: 0 days 0:03:16.029
BugCheck 162, {ffffd18b412ac080, ffffe48708ec5b50, ffffffff, 0}
Probably caused by: ntkrnlmp.exe ( nt!KeAbPostRelease+1af8c7 )
BUGCHECK_STR: 0x162
PROCESS_NAME: svchost.exe
¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨``
Built by: 19041.1.amd64fre.vb_release.191206-1406
Debug session time: Sat Feb 20 14:42:16.733 2021 (UTC + 0:00)
System Uptime: 0 days 0:04:32.358
BugCheck 139, {1e, ffffae066aab4f50, ffffae066aab4ea8, 0}
Probably caused by: ntkrnlmp.exe ( nt!KiFastFailDispatch+d0 )
BUGCHECK_STR: 0x139
PROCESS_NAME: steam.exe
¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨``
Built by: 19041.1.amd64fre.vb_release.191206-1406
Debug session time: Sat Feb 20 12:51:37.366 2021 (UTC + 0:00)
System Uptime: 0 days 0:03:58.990
BugCheck 3B, {c0000005, fffff80422c60ae8, ffffaf8d32875de0, 0}
Probably caused by: ntkrnlmp.exe ( nt!ExAcquirePushLockExclusiveEx+108 )
BUGCHECK_STR: 0x3B_c0000005
PROCESS_NAME: csrss.exe
¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨``
Built by: 19041.1.amd64fre.vb_release.191206-1406
Debug session time: Sat Feb 20 12:47:14.060 2021 (UTC + 0:00)
System Uptime: 0 days 0:07:21.685
BugCheck 3B, {c0000005, fffff8052baee8d7, fffffd06556e3b60, 0}
Probably caused by: dxgkrnl.sys ( dxgkrnl!DXGALLOCATIONREFERENCE::~DXGALLOCATIONREFERENCE+114 )
BUGCHECK_STR: 0x3B_c0000005
PROCESS_NAME: firefox.exe
¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨``
Built by: 19041.1.amd64fre.vb_release.191206-1406
Debug session time: Sat Feb 20 12:25:26.282 2021 (UTC + 0:00)
System Uptime: 0 days 0:09:33.907
BugCheck 192, {ffffd988fc7b5080, ffff860aae0da9c8, 0, 0}
*** WARNING: Unable to verify timestamp for klif.sys
Probably caused by: klif.sys ( klif+b4d9d )
BUGCHECK_STR: 0x192
PROCESS_NAME: firefox.exe
¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨``
Built by: 19041.1.amd64fre.vb_release.191206-1406
Debug session time: Sat Feb 20 11:25:19.879 2021 (UTC + 0:00)
System Uptime: 0 days 0:03:32.503
BugCheck 1000007E, {ffffffffc0000005, fffff8025e5bb48b, ffffc885d2d95198, ffffc885d2d949d0}
*** WARNING: Unable to verify timestamp for win32k.sys
Probably caused by: Ntfs.sys ( Ntfs!NtfsAcquireFileForModWrite+fb )
BUGCHECK_STR: AV
PROCESS_NAME: System
¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨``
Built by: 19041.1.amd64fre.vb_release.191206-1406
Debug session time: Sat Feb 20 11:21:23.320 2021 (UTC + 0:00)
System Uptime: 0 days 0:04:49.945
BugCheck A, {7ffb24d48efb, 2, 1, fffff80213c0cece}
Probably caused by: memory_corruption ( nt!MiUserFault+28e )
BUGCHECK_STR: AV
PROCESS_NAME: dwm.exe
¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨``
Built by: 19041.1.amd64fre.vb_release.191206-1406
Debug session time: Sat Feb 20 11:16:08.170 2021 (UTC + 0:00)
System Uptime: 0 days 0:03:11.794
BugCheck D1, {ffffa10f000000c5, 2, 0, fffff807239572e8}
Probably caused by: afd.sys ( afd!AfdPoll64+544 )
BUGCHECK_STR: AV
PROCESS_NAME: firefox.exe
¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨``
Built by: 19041.1.amd64fre.vb_release.191206-1406
Debug session time: Sat Feb 20 11:01:18.476 2021 (UTC + 0:00)
System Uptime: 0 days 2:11:57.096
BugCheck A, {0, ff, 0, fffff80358b8a967}
*** WARNING: Unable to verify timestamp for win32k.sys
Probably caused by: ntkrnlmp.exe ( nt!HvlGetPpmStatsForProcessor+37 )
BUGCHECK_STR: AV
PROCESS_NAME: System
¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨``
Built by: 18362.1.amd64fre.19h1_release.190318-1202
Debug session time: Sat Feb 20 07:21:12.201 2021 (UTC + 0:00)
System Uptime: 0 days 0:50:42.168
BugCheck A, {8, 2, 0, fffff80678a798cd}
Probably caused by: ntkrnlmp.exe ( nt!KiTryUnwaitThread+17d )
BUGCHECK_STR: AV
PROCESS_NAME: EpicWebHelper.exe
¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨``