I suspect Firefox cause journal problem, doing lags of keyboard and mouse input, or slow apps

[Alejandro Gómez]

I have a new installation of Ubuntu 20.04 LTS.

Two weeks ago I experienced several issues:
-slow boot
-disk failures (inodes corrupted, superblock invalid, read-only at start)
-Firefox slower to respond at start, can't get the previous session
-systemd-journald error trying to write on read-only filesystem
-/tmpfs read-only
-/var/log/journal with 1.6 GB
-snap-store process with the highest memory use

Yesterday I have to abandon the use of this Ubuntu 20.04, because the lack of trust

Today, I trim the max size of journal files (100 MB), change resolution of display and avoid using Firefox (instead using Chromium); however, this report invoke Firefox; during 2 hours I been working as smooth and fine as always.

Finally, I use Ubuntu in a diary basis; in this device I have versions 16.04, 18.04 and 20.04. Only 20.04 give this problems.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: firefox 79.0+build1-0ubuntu0.20.04.1
ProcVersionSignature: Ubuntu 5.4.0-42.46-generic 5.4.44
Uname: Linux 5.4.0-42-generic x86_64
AddonCompatCheckDisabled: False
ApportVersion: 2.20.11-0ubuntu27.6
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC1: alejandro 2458 F.... pulseaudio
 /dev/snd/controlC0: alejandro 2458 F.... pulseaudio
BuildID: 20200720193547
CasperMD5CheckResult: skip
Channel: Unavailable
CurrentDesktop: ubuntu:GNOME
Date: Thu Aug 6 21:48:33 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:725
DefaultProfileThemes: extensions.sqlite corrupt or missing
ForcedLayersAccel: False
InstallationDate: Installed on 2020-05-19 (79 days ago)
InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
IpRoute:
 default via 192.168.1.254 dev wlp2s0 proto dhcp metric 600
 169.254.0.0/16 dev wlp2s0 scope link metric 1000
 192.168.1.0/24 dev wlp2s0 proto kernel scope link src 192.168.1.64 metric 600
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:725
Profile0PrefSources: prefs.js
Profile0Themes: extensions.sqlite corrupt or missing
Profiles:
 Profile1 (Default) - LastVersion=None/None (Out of date)
 Profile0 - LastVersion=79.0/20200720193547
RunningIncompatibleAddons: False
SourcePackage: firefox
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 08/24/2015
dmi.bios.vendor: LENOVO
dmi.bios.version: A4CN40WW (V 2.09)
dmi.board.asset.tag: No Asset Tag
dmi.board.name: Lancer 5B3
dmi.board.vendor: LENOVO
dmi.board.version: SDK0J40688SDK0J40688 WIN
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Lenovo Z50-75
dmi.modalias: dmi:bvnLENOVO:bvrA4CN40WW(V2.09):bd08/24/2015:svnLENOVO:pn80EC:pvrLenovoZ50-75:rvnLENOVO:rnLancer5B3:rvrSDK0J40688SDK0J40688WIN:cvnLENOVO:ct10:cvrLenovoZ50-75:
dmi.product.family: IDEAPAD
dmi.product.name: 80EC
dmi.product.sku: LENOVO_MT_80EC0_BU_idea_FM_Lenovo Z50-75
dmi.product.version: Lenovo Z50-75
dmi.sys.vendor: LENOVO