Firefox fails to start in Ubuntu 22.04 Live USB persistent on reboot

[Kamalakar Agashe]

I have made Ubuntu 22.04 Live USB persistent using daily build iso using mkusb on Ubuntu 20.04. On first boot the firefox can be used but on reboot after saving settings firefox fails to start. The firefox command in terminal gives:
$ firefox
snap-confine has elevated permissions and it is not confined but should be. Refusing to continue to avoid permission escalation attacks

This is happening because Live mode breaks AppArmor.

The workaround is as follows:
In Live Persistent mode:
$ sudo mkdir /lib/systemd/system/apparmor.service.d

to create a directory apparmor.service.d in /lib/systemd/system/

sudo gedit /lib/systemd/system/apparmor.service.d/30_live_mode.conf

to create config file in the new directory

Paste
[Unit]
ConditionPathExists=

Save and reboot.

and Firefox works!

[Kamalakar Agashe (kagashe)]

Forgot to add
Source of workaround
https://forums.whonix.org/t/live-mode-breaks-apparmor/7559

[sudodus (nio-wiklund)]

mkusb version 12.7.4 is in the unstable PPA now, and Firefox works for me, at least with standard Ubuntu and Lubuntu [persistent live made by dus]. Please test that it works for you too.

[Kamalakar Agashe (kagashe)]

Downloaded and installed mkusb version 12.7.4 on Ubuntu 20.04, made new persistent usb and tested. It works for me as well. Thank you for releasing this mkusb version just in time for Ubuntu 22.04 released on 21st April 2022.
This bug may be marked appropriately.