Chromium crashes after about a day.

After about a day of use (or more accurately, after about half a day of non-use) my browser reports "aw snap: SIGTRAP" on every new page. Old pages still render, but a reload causes the "aw snap!"

It happens on both my Ubuntu 20.04 workstations. It is not hardware on either one, I'd think. Other stuff like: "is the disk full" seem like likely candidates, but... two different machines, same behaviour!

--
the gritty details:

1) Both machines report:
Description: Ubuntu 20.04.1 LTS
Release: 20.04

2) One machine reports:

% dpkg -l chromium-browser
ii chromium-browser 1:85.0.4183.83-0ubuntu0.20.04.2 amd64 Transitional package - chro>

the other says: dpkg-query: no packages found matching chromium-browser

3) I expect to be able to continue to work with my browser even after I've been away for 8 hours (sleep, you know).

4) all new pages display "aw snap!" instead.
---
ProblemType: Bug
ApportVersion: 2.20.11-0ubuntu27.14
Architecture: amd64
CasperMD5CheckResult: skip
DRM.card0-DVI-I-1:
 enabled: enabled
 dpms: On
 status: connected
 edid-base64: AP///////wAEcmgEvF9hlC4dAQOANB14KizFpFZQoSgPUFSzDABxT4GAgcCBAJUAswDRwAEBAjqAGHE4LUBYLEUACSUhAAAeAAAA/QA3TB5TEQAKICAgICAgAAAA/wBUM1NFRTAwNTQyMDYKAAAA/ABBY2VyIEtBMjQwSFEKAGg=
 modes: 1920x1080 1680x1050 1280x1024 1440x900 1280x800 1152x864 1280x720 1024x768 1024x768 800x600 800x600 640x480 640x480 720x400
DRM.card0-HDMI-A-1:
 enabled: disabled
 dpms: On
 status: disconnected
 edid-base64:
 modes:
DRM.card0-VGA-1:
 enabled: enabled
 dpms: On
 status: connected
 edid-base64: AP///////wAQrBRAWDFBQgIRAQMOJh547mh1olpJnyMTUFSlSwBxT4GAAQEBAQEBAQEBAQEBMCoAmFEAKkAwcBMAeC0RAAAeAAAA/wBHVTYyMDcxREJBMVgKAAAA/ABERUxMIDE5MDdGUAogAAAA/QA4TB5RDgAKICAgICAgAAQ=
 modes: 1280x1024 1280x1024 1152x864 1024x768 1024x768 800x600 800x600 640x480 640x480 720x400
DiskUsage:
 Filesystem Type Size Used Avail Use% Mounted on
 abra2:/home nfs4 459G 431G 4.4G 100% /home
 tmpfs tmpfs 3.9G 217M 3.7G 6% /dev/shm
 abra2:/home nfs4 459G 431G 4.4G 100% /home
DistroRelease: Ubuntu 20.04
InstallationDate: Installed on 2013-10-01 (2673 days ago)
InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Release amd64 (20130424)
MachineType: System manufacturer P5QL PRO
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
Package: chromium-browser 1:85.0.4183.83-0ubuntu0.20.04.2
PackageArchitecture: amd64
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-62-generic root=UUID=0f69857e-ab0d-4b7b-9d51-a3832ea3d262 ro quiet splash vt.handoff=7
ProcVersionSignature: Ubuntu 5.4.0-62.70-generic 5.4.78
Snap.Changes:
 ID Status Spawn Ready Summary
 417 Done 2021-01-26T08:52:52+01:00 2021-01-26T08:54:01+01:00 Auto-refresh snap "chromium"
Snap.ChromeDriverVersion:
 ERROR: ld.so: object 'libgtk3-nocsd.so.0' from LD_PRELOAD cannot be preloaded (failed to map segment from shared object): ignored.
 /bin/bash: warning: setlocale: LC_ALL: cannot change locale (en_US.UTF-8)
 ChromeDriver 88.0.4324.96 (68dba2d8a0b149a1d3afac56fa74648032bcf46b-refs/branch-heads/4324@{#1784})
Snap.ChromiumVersion:
 ERROR: ld.so: object 'libgtk3-nocsd.so.0' from LD_PRELOAD cannot be preloaded (failed to map segment from shared object): ignored.
 /bin/bash: warning: setlocale: LC_ALL: cannot change locale (en_US.UTF-8)
 Chromium 88.0.4324.96 snap
Tags: focal snap
Uname: Linux 5.4.0-62-generic x86_64
UpgradeStatus: Upgraded to focal on 2020-08-14 (165 days ago)
UserGroups: adm cdrom dialout dip lp lpadmin plugdev sambashare scanner sudo video
_MarkForUpload: True
acpidump:
 Error: command ['pkexec', '/usr/share/apport/dump_acpi_tables.py'] failed with exit code 127: polkit-agent-helper-1: error response to PolicyKit daemon: GDBus.Error:org.freedesktop.PolicyKit1.Error.Failed: No session for cookie
 Error executing command as another user: Not authorized

 This incident has been reported.
dmi.bios.date: 07/01/2009
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 1004
dmi.board.asset.tag: To Be Filled By O.E.M.
dmi.board.name: P5QL PRO
dmi.board.vendor: ASUSTeK Computer INC.
dmi.board.version: Rev 1.xx
dmi.chassis.asset.tag: Asset-1234567890
dmi.chassis.type: 3
dmi.chassis.vendor: Chassis Manufacture
dmi.chassis.version: Chassis Version
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr1004:bd07/01/2009:svnSystemmanufacturer:pnP5QLPRO:pvrSystemVersion:rvnASUSTeKComputerINC.:rnP5QLPRO:rvrRev1.xx:cvnChassisManufacture:ct3:cvrChassisVersion:
dmi.product.family: To Be Filled By O.E.M.
dmi.product.name: P5QL PRO
dmi.product.sku: To Be Filled By O.E.M.
dmi.product.version: System Version
dmi.sys.vendor: System manufacturer
---
ProblemType: Bug
ApportVersion: 2.20.11-0ubuntu27.14
Architecture: amd64
CasperMD5CheckResult: skip
DRM.card0-DVI-I-1:
 enabled: enabled
 dpms: On
 status: connected
 edid-base64: AP///////wAEcmgEvF9hlC4dAQOANB14KizFpFZQoSgPUFSzDABxT4GAgcCBAJUAswDRwAEBAjqAGHE4LUBYLEUACSUhAAAeAAAA/QA3TB5TEQAKICAgICAgAAAA/wBUM1NFRTAwNTQyMDYKAAAA/ABBY2VyIEtBMjQwSFEKAGg=
 modes: 1920x1080 1680x1050 1280x1024 1440x900 1280x800 1152x864 1280x720 1024x768 1024x768 800x600 800x600 640x480 640x480 720x400
DRM.card0-HDMI-A-1:
 enabled: disabled
 dpms: On
 status: disconnected
 edid-base64:
 modes:
DRM.card0-VGA-1:
 enabled: enabled
 dpms: On
 status: connected
 edid-base64: AP///////wAQrBRAWDFBQgIRAQMOJh547mh1olpJnyMTUFSlSwBxT4GAAQEBAQEBAQEBAQEBMCoAmFEAKkAwcBMAeC0RAAAeAAAA/wBHVTYyMDcxREJBMVgKAAAA/ABERUxMIDE5MDdGUAogAAAA/QA4TB5RDgAKICAgICAgAAQ=
 modes: 1280x1024 1280x1024 1152x864 1024x768 1024x768 800x600 800x600 640x480 640x480 720x400
DiskUsage:
 Filesystem Type Size Used Avail Use% Mounted on
 abra2:/home nfs4 459G 431G 4.3G 100% /home
 tmpfs tmpfs 3.9G 197M 3.7G 5% /dev/shm
 abra2:/home nfs4 459G 431G 4.3G 100% /home
DistroRelease: Ubuntu 20.04
InstallationDate: Installed on 2013-10-01 (2673 days ago)
InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Release amd64 (20130424)
MachineType: System manufacturer P5QL PRO
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
Package: chromium-browser 1:85.0.4183.83-0ubuntu0.20.04.2
PackageArchitecture: amd64
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-62-generic root=UUID=0f69857e-ab0d-4b7b-9d51-a3832ea3d262 ro quiet splash vt.handoff=7
ProcVersionSignature: Ubuntu 5.4.0-62.70-generic 5.4.78
Snap.Changes:
 ID Status Spawn Ready Summary
 417 Done 2021-01-26T08:52:52+01:00 2021-01-26T08:54:01+01:00 Auto-refresh snap "chromium"
Snap.ChromeDriverVersion:
 ERROR: ld.so: object 'libgtk3-nocsd.so.0' from LD_PRELOAD cannot be preloaded (failed to map segment from shared object): ignored.
 /bin/bash: warning: setlocale: LC_ALL: cannot change locale (en_US.UTF-8)
 ChromeDriver 88.0.4324.96 (68dba2d8a0b149a1d3afac56fa74648032bcf46b-refs/branch-heads/4324@{#1784})
Snap.ChromiumVersion:
 ERROR: ld.so: object 'libgtk3-nocsd.so.0' from LD_PRELOAD cannot be preloaded (failed to map segment from shared object): ignored.
 /bin/bash: warning: setlocale: LC_ALL: cannot change locale (en_US.UTF-8)
 Chromium 88.0.4324.96 snap
Tags: focal snap
Uname: Linux 5.4.0-62-generic x86_64
UpgradeStatus: Upgraded to focal on 2020-08-14 (165 days ago)
UserGroups: adm cdrom dialout dip lp lpadmin plugdev sambashare scanner sudo video
_MarkForUpload: True
acpidump:
 Error: command ['pkexec', '/usr/share/apport/dump_acpi_tables.py'] failed with exit code 127: polkit-agent-helper-1: error response to PolicyKit daemon: GDBus.Error:org.freedesktop.PolicyKit1.Error.Failed: No session for cookie
 Error executing command as another user: Not authorized

 This incident has been reported.
dmi.bios.date: 07/01/2009
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 1004
dmi.board.asset.tag: To Be Filled By O.E.M.
dmi.board.name: P5QL PRO
dmi.board.vendor: ASUSTeK Computer INC.
dmi.board.version: Rev 1.xx
dmi.chassis.asset.tag: Asset-1234567890
dmi.chassis.type: 3
dmi.chassis.vendor: Chassis Manufacture
dmi.chassis.version: Chassis Version
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr1004:bd07/01/2009:svnSystemmanufacturer:pnP5QLPRO:pvrSystemVersion:rvnASUSTeKComputerINC.:rnP5QLPRO:rvrRev1.xx:cvnChassisManufacture:ct3:cvrChassisVersion:
dmi.product.family: To Be Filled By O.E.M.
dmi.product.name: P5QL PRO
dmi.product.sku: To Be Filled By O.E.M.
dmi.product.version: System Version
dmi.sys.vendor: System manufacturer