cursor flickers/disappears and windows resize or move randomly

[Barmak Nassirian]

Ubuntu 20.04 natively installed on 2013 Google Pixel Chromebook (i.e., it is the only OS on machine)

Installation went fine, but after a few minutes of use, the cursor begins to act up--flickering and sometimes disappearing altogether. Even more problematic: Firefox windows resize on their own or move. Sometime moving the cursor moves the resized windows (as if I am clicking and holding the menu bar) and sometimes not.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: firefox 75.0+build3-0ubuntu1
ProcVersionSignature: Ubuntu 5.4.0-42.46-generic 5.4.44
Uname: Linux 5.4.0-42-generic x86_64
AddonCompatCheckDisabled: False
ApportVersion: 2.20.11-0ubuntu27
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: barmak 1859 F.... pulseaudio
BuildID: 20200403170909
CasperMD5CheckResult: skip
Channel: Unavailable
CurrentDesktop: ubuntu:GNOME
Date: Wed Aug 19 01:44:02 2020
DefaultProfileExtensions: extensions.sqlite corrupt or missing
DefaultProfileIncompatibleExtensions: Unavailable (corrupt or non-existant compatibility.ini or extensions.sqlite)
DefaultProfileLocales: extensions.sqlite corrupt or missing
DefaultProfilePrefErrors: Unexpected character ',' before close parenthesis @ /usr/lib/firefox/omni.ja:greprefs.js:733
DefaultProfileThemes: extensions.sqlite corrupt or missing
ExecutablePath: /usr/lib/firefox/firefox
ForcedLayersAccel: False
InstallationDate: Installed on 2020-08-19 (0 days ago)
InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
IpRoute:
 default via 192.168.1.1 dev wlp3s0 proto dhcp metric 600
 169.254.0.0/16 dev wlp3s0 scope link metric 1000
 192.168.1.0/24 dev wlp3s0 proto kernel scope link src 192.168.1.237 metric 600
ProcEnviron:
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
Profile0Extensions: extensions.sqlite corrupt or missing
Profile0IncompatibleExtensions: Unavailable (corrupt or non-existant compatibility.ini or extensions.sqlite)
Profile0Locales: extensions.sqlite corrupt or missing
Profile0PrefErrors: Unexpected character ',' before close parenthesis @ /usr/lib/firefox/omni.ja:greprefs.js:733
Profile0PrefSources: prefs.js
Profile0Themes: extensions.sqlite corrupt or missing
Profiles:
 Profile1 (Default) - LastVersion=None/None (Out of date)
 Profile0 - LastVersion=75.0/20200403170909 (In use)
RunningIncompatibleAddons: False
SourcePackage: firefox
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 06/04/2020
dmi.bios.vendor: coreboot
dmi.bios.version: MrChromebox-4.12
dmi.board.name: Link
dmi.board.vendor: GOOGLE
dmi.board.version: 1.0
dmi.chassis.type: 9
dmi.chassis.vendor: GOOGLE
dmi.modalias: dmi:bvncoreboot:bvrMrChromebox-4.12:bd06/04/2020:svnGOOGLE:pnLink:pvr1.0:rvnGOOGLE:rnLink:rvr1.0:cvnGOOGLE:ct9:cvr:
dmi.product.name: Link
dmi.product.version: 1.0
dmi.sys.vendor: GOOGLE