Bad tab preview when using Firefox and hovering above taskbar

[Daniel LaSalle]

Using latest Ubuntu MATE + Firefox, when I hover my mouse cursor over the tag preview over the task bar it does not show the proper representation of the content.

This used to work well in a somewhat distant (~6+ months ago) past.

See screenshots for details.

ProblemType: Bug
DistroRelease: Ubuntu 22.04
Package: mate-panel 1.26.2-1
ProcVersionSignature: Ubuntu 5.15.0-46.49-generic 5.15.39
Uname: Linux 5.15.0-46-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.11-0ubuntu82.1
Architecture: amd64
CasperMD5CheckResult: pass
CurrentDesktop: MATE
Date: Wed Aug 10 21:34:09 2022
InstallationDate: Installed on 2022-06-27 (44 days ago)
InstallationMedia: Ubuntu-MATE 22.04 LTS "Jammy Jellyfish" - Release amd64 (20220419)
SourcePackage: mate-panel
UpgradeStatus: No upgrade log present (probably fresh install)