sudo apt-get install kinit

gwenview
Reading profile /etc/firejail/gwenview.profile
Reading profile /etc/firejail/disable-common.inc
Reading profile /etc/firejail/disable-devel.inc
Reading profile /etc/firejail/disable-passwdmgr.inc
Reading profile /etc/firejail/disable-programs.inc
Reading profile /etc/firejail/whitelist-var-common.inc
Parent pid 18801, child pid 18802
Blacklist violations are logged to syslog
Child process initialized in 185.51 ms
Invalid Context= "stock" line for icon theme:  "/usr/share/icons/Ambiant-MATE/stock/22/"
Invalid Context= "stock" line for icon theme:  "/usr/share/icons/ubuntu-mono-dark/stock/16/"
Invalid Context= "stock" line for icon theme:  "/usr/share/icons/ubuntu-mono-dark/stock/22/"
Invalid Context= "stock" line for icon theme:  "/usr/share/icons/ubuntu-mono-dark/stock/24/"
Invalid Context= "stock" line for icon theme:  "/usr/share/icons/ubuntu-mono-dark/stock/32/"
Invalid Context= "stock" line for icon theme:  "/usr/share/icons/ubuntu-mono-dark/stock/48/"
Invalid Context= "stock" line for icon theme:  "/usr/share/icons/ubuntu-mono-dark/stock/64/"
Invalid Context= "stock" line for icon theme:  "/usr/share/icons/ubuntu-mono-dark/stock/128/"
UdevQt: unable to create udev monitor connection
The desktop entry file "/usr/share/applications/veracrypt.desktop" has Type= "Application" but no Exec line
kf5.kservice.sycoca: Invalid Service :  "/usr/share/applications/veracrypt.desktop"
klauncher not running... launching kdeinit
Can not find 'kdeinit5' executable at  "/usr/games:/home/msk/bin:/home/msk/.local/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin" "/usr/bin, /usr/lib/x86_64-linux-gnu/qt5/bin"
klauncher not running... launching kdeinit
Can not find 'kdeinit5' executable at  "/usr/games:/home/msk/bin:/home/msk/.local/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin" "/usr/bin, /usr/lib/x86_64-linux-gnu/qt5/bin"
klauncher not running... launching kdeinit
Can not find 'kdeinit5' executable at  "/usr/games:/home/msk/bin:/home/msk/.local/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin" "/usr/bin, /usr/lib/x86_64-linux-gnu/qt5/bin"
kf5.kio.core: couldn't create slave: "Cannot talk to klauncher: The name org.kde.klauncher5 was not provided by any .service files"
klauncher not running... launching kdeinit
Can not find 'kdeinit5' executable at  "/usr/games:/home/msk/bin:/home/msk/.local/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin" "/usr/bin, /usr/lib/x86_64-linux-gnu/qt5/bin"
klauncher not running... launching kdeinit
Can not find 'kdeinit5' executable at  "/usr/games:/home/msk/bin:/home/msk/.local/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin" "/usr/bin, /usr/lib/x86_64-linux-gnu/qt5/bin"
kf5.kio.core: couldn't create slave: "Cannot talk to klauncher: The name org.kde.klauncher5 was not provided by any .service files"
klauncher not running... launching kdeinit
Can not find 'kdeinit5' executable at  "/usr/games:/home/msk/bin:/home/msk/.local/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin" "/usr/bin, /usr/lib/x86_64-linux-gnu/qt5/bin"
klauncher not running... launching kdeinit
Can not find 'kdeinit5' executable at  "/usr/games:/home/msk/bin:/home/msk/.local/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin" "/usr/bin, /usr/lib/x86_64-linux-gnu/qt5/bin"
kf5.kio.core: couldn't create slave: "Cannot talk to klauncher: The name org.kde.klauncher5 was not provided by any .service files"
klauncher not running... launching kdeinit
Can not find 'kdeinit5' executable at  "/usr/games:/home/msk/bin:/home/msk/.local/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin" "/usr/bin, /usr/lib/x86_64-linux-gnu/qt5/bin"
klauncher not running... launching kdeinit
Can not find 'kdeinit5' executable at  "/usr/games:/home/msk/bin:/home/msk/.local/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin" "/usr/bin, /usr/lib/x86_64-linux-gnu/qt5/bin"
kf5.kio.core: couldn't create slave: "Cannot talk to klauncher: The name org.kde.klauncher5 was not provided by any .service files"
klauncher not running... launching kdeinit
Can not find 'kdeinit5' executable at  "/usr/games:/home/msk/bin:/home/msk/.local/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin" "/usr/bin, /usr/lib/x86_64-linux-gnu/qt5/bin"
klauncher not running... launching kdeinit
Can not find 'kdeinit5' executable at  "/usr/games:/home/msk/bin:/home/msk/.local/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin" "/usr/bin, /usr/lib/x86_64-linux-gnu/qt5/bin"
kf5.kio.core: couldn't create slave: "Cannot talk to klauncher: The name org.kde.klauncher5 was not provided by any .service files"
klauncher not running... launching kdeinit
Can not find 'kdeinit5' executable at  "/usr/games:/home/msk/bin:/home/msk/.local/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin" "/usr/bin, /usr/lib/x86_64-linux-gnu/qt5/bin"
klauncher not running... launching kdeinit
Can not find 'kdeinit5' executable at  "/usr/games:/home/msk/bin:/home/msk/.local/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin" "/usr/bin, /usr/lib/x86_64-linux-gnu/qt5/bin"
kf5.kio.core: couldn't create slave: "Cannot talk to klauncher: The name org.kde.klauncher5 was not provided by any .service files"
klauncher not running... launching kdeinit
Can not find 'kdeinit5' executable at  "/usr/games:/home/msk/bin:/home/msk/.local/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin" "/usr/bin, /usr/lib/x86_64-linux-gnu/qt5/bin"
klauncher not running... launching kdeinit
Can not find 'kdeinit5' executable at  "/usr/games:/home/msk/bin:/home/msk/.local/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin" "/usr/bin, /usr/lib/x86_64-linux-gnu/qt5/bin"
kf5.kio.core: couldn't create slave: "Cannot talk to klauncher: The name org.kde.klauncher5 was not provided by any .service files"
klauncher not running... launching kdeinit
Can not find 'kdeinit5' executable at  "/usr/games:/home/msk/bin:/home/msk/.local/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin" "/usr/bin, /usr/lib/x86_64-linux-gnu/qt5/bin"
klauncher not running... launching kdeinit
Can not find 'kdeinit5' executable at  "/usr/games:/home/msk/bin:/home/msk/.local/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin" "/usr/bin, /usr/lib/x86_64-linux-gnu/qt5/bin"
kf5.kio.core: couldn't create slave: "Cannot talk to klauncher: The name org.kde.klauncher5 was not provided by any .service files"
klauncher not running... launching kdeinit
Can not find 'kdeinit5' executable at  "/usr/games:/home/msk/bin:/home/msk/.local/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin" "/usr/bin, /usr/lib/x86_64-linux-gnu/qt5/bin"
klauncher not running... launching kdeinit
Can not find 'kdeinit5' executable at  "/usr/games:/home/msk/bin:/home/msk/.local/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin" "/usr/bin, /usr/lib/x86_64-linux-gnu/qt5/bin"
kf5.kio.core: couldn't create slave: "Cannot talk to klauncher: The name org.kde.klauncher5 was not provided by any .service files"
klauncher not running... launching kdeinit
Can not find 'kdeinit5' executable at  "/usr/games:/home/msk/bin:/home/msk/.local/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin" "/usr/bin, /usr/lib/x86_64-linux-gnu/qt5/bin"
klauncher not running... launching kdeinit
Can not find 'kdeinit5' executable at  "/usr/games:/home/msk/bin:/home/msk/.local/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin" "/usr/bin, /usr/lib/x86_64-linux-gnu/qt5/bin"
kf5.kio.core: couldn't create slave: "Cannot talk to klauncher: The name org.kde.klauncher5 was not provided by any .service files"
klauncher not running... launching kdeinit
Can not find 'kdeinit5' executable at  "/usr/games:/home/msk/bin:/home/msk/.local/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin" "/usr/bin, /usr/lib/x86_64-linux-gnu/qt5/bin"
klauncher not running... launching kdeinit
Can not find 'kdeinit5' executable at  "/usr/games:/home/msk/bin:/home/msk/.local/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin" "/usr/bin, /usr/lib/x86_64-linux-gnu/qt5/bin"
kf5.kio.core: couldn't create slave: "Cannot talk to klauncher: The name org.kde.klauncher5 was not provided by any .service files"
klauncher not running... launching kdeinit
Can not find 'kdeinit5' executable at  "/usr/games:/home/msk/bin:/home/msk/.local/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin" "/usr/bin, /usr/lib/x86_64-linux-gnu/qt5/bin"
klauncher not running... launching kdeinit
Can not find 'kdeinit5' executable at  "/usr/games:/home/msk/bin:/home/msk/.local/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin" "/usr/bin, /usr/lib/x86_64-linux-gnu/qt5/bin"
kf5.kio.core: couldn't create slave: "Cannot talk to klauncher: The name org.kde.klauncher5 was not provided by any .service files"

which kdeinit5

[Desktop Entry]
Name=Icecat
Exec=firejail /opt/icecat/icecat
Terminal=false
X-MultipleArgs=false
Type=Application
Categories=Network;WebBrowser;
Icon=/opt/icecat/browser/chrome/icons/default/default48.png