Ok Update 3: I've just installed Firefox 87 from the website and same graphics 
issues as before. 
What ever they have changed in the Nightly build 89.0a1, seems to have fixed 
the problem.  

Thanks 
Rue

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You received this bug notification because you are a member of Desktop
Packages, which is subscribed to firefox in Ubuntu.
https://bugs.launchpad.net/bugs/1919955

Title:
  weird graphics artifacts in Firefox on Xorg after upgrade

Status in firefox package in Ubuntu:
  Incomplete

Bug description:
  Hi, just updated today and after restart I logged in under Xorg and when 
opening Firefox you get blue and black pixelated static across the screen. this 
only happens running Xorg, not under Wayland. A bit hard to explain the issue, 
so added a screenshot
  Also this could be an Xorg issue 
  It only seems to affect Firefox. 
  Thanks 
  Rue

  ProblemType: Bug
  DistroRelease: Ubuntu 21.04
  Package: firefox 86.0+build3-0ubuntu1
  ProcVersionSignature: Ubuntu 5.11.0-11.12-generic 5.11.0
  Uname: Linux 5.11.0-11-generic x86_64
  AddonCompatCheckDisabled: False
  ApportVersion: 2.20.11-0ubuntu60
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  rue        5652 F.... pulseaudio
  BuildID: 20210222142601
  CasperMD5CheckResult: unknown
  Channel: Unavailable
  CurrentDesktop: ubuntu:GNOME
  Date: Thu Mar 18 18:12:48 2021
  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:348
  DefaultProfileThemes: extensions.sqlite corrupt or missing
  ForcedLayersAccel: False
  InstallationDate: Installed on 2021-03-16 (1 days ago)
  InstallationMedia: Ubuntu 21.04 "Hirsute Hippo" - Alpha amd64 (20210123)
  IpRoute:
   default via 192.168.1.254 dev enp0s25 proto dhcp metric 100 
   169.254.0.0/16 dev enp0s25 scope link metric 1000 
   192.168.1.0/24 dev enp0s25 proto kernel scope link src 192.168.1.70 metric 
100
  ProcEnviron:
   LANGUAGE=en_NZ:en
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_NZ.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:348
  Profile0PrefSources: prefs.js
  Profile0Themes: extensions.sqlite corrupt or missing
  Profiles:
   Profile1 (Default) - LastVersion=None/None (Out of date)
   Profile0 - LastVersion=86.0/20210222142601
  RunningIncompatibleAddons: False
  SourcePackage: firefox
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 06/09/2010
  dmi.bios.release: 1.5
  dmi.bios.vendor: Hewlett-Packard
  dmi.bios.version: 786H1 v01.05
  dmi.board.name: 304Ah
  dmi.board.vendor: Hewlett-Packard
  dmi.chassis.type: 4
  dmi.chassis.vendor: Hewlett-Packard
  dmi.modalias: 
dmi:bvnHewlett-Packard:bvr786H1v01.05:bd06/09/2010:br1.5:svnHewlett-Packard:pnHPCompaq8100EliteSFFPC:pvr:rvnHewlett-Packard:rn304Ah:rvr:cvnHewlett-Packard:ct4:cvr:
  dmi.product.family: 103C_53307F
  dmi.product.name: HP Compaq 8100 Elite SFF PC
  dmi.product.sku: LE093PA#ABG
  dmi.sys.vendor: Hewlett-Packard

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