firefox is freezing

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firefox is freezing while openning new page or scrolling

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: firefox 78.0.2+build2-0ubuntu0.20.04.1
ProcVersionSignature: Ubuntu 5.4.0-40.44-generic 5.4.44
Uname: Linux 5.4.0-40-generic x86_64
AddonCompatCheckDisabled: False
ApportVersion: 2.20.11-0ubuntu27.4
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC1: ljubisa 982 F.... pulseaudio
 /dev/snd/controlC0: ljubisa 982 F.... pulseaudio
BuildID: 20200708170202
CasperMD5CheckResult: skip
Channel: Unavailable
CurrentDesktop: ubuntu:GNOME
Date: Fri Jul 17 15:52:34 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:730
DefaultProfileThemes: extensions.sqlite corrupt or missing
ForcedLayersAccel: False
InstallationDate: Installed on 2020-06-17 (30 days ago)
InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
IpRoute:
 default via 192.168.8.1 dev wlp3s5 proto dhcp metric 600
 169.254.0.0/16 dev wlp3s5 scope link metric 1000
 192.168.8.0/24 dev wlp3s5 proto kernel scope link src 192.168.8.100 metric 600
ProcEnviron:
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=sr_RS
 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:730
Profile0PrefSources: prefs.js
Profile0Themes: extensions.sqlite corrupt or missing
Profiles:
 Profile1 (Default) - LastVersion=None/None (Out of date)
 Profile0 - LastVersion=78.0.2/20200708170202 (In use)
RunningIncompatibleAddons: False
SourcePackage: firefox
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 08/10/2016
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: V8.4
dmi.board.asset.tag: To be filled by O.E.M.
dmi.board.name: A68HM-E33 V2 (MS-7721)
dmi.board.vendor: MSI
dmi.board.version: 9.0
dmi.chassis.asset.tag: To Be Filled By O.E.M.
dmi.chassis.type: 3
dmi.chassis.vendor: MSI
dmi.chassis.version: 9.0
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrV8.4:bd08/10/2016:svnMSI:pnMS-7721:pvr9.0:rvnMSI:rnA68HM-E33V2(MS-7721):rvr9.0:cvnMSI:ct3:cvr9.0:
dmi.product.family: To be filled by O.E.M.
dmi.product.name: MS-7721
dmi.product.sku: To be filled by O.E.M.
dmi.product.version: 9.0
dmi.sys.vendor: MSI