I am Questions. (Filejail Error)

I downloaded the app image from here. If I do sudo ./appimage, it works well, but I just want to try filejail.

~$ sudo firejail --appimage --private --net=eth0 --x11 balenaEtcher-1.5.69-x64.appimage

Error: X11 sandboxing is not available when running as root

Will you help me? I’d like to run it with a filijail.

I think it is not possible to run balenaEtcher with Firejail since it needs administrative privileges in order to be able to get access to the hardware to flash USB devices.

Maybe try Firejail with an app that does not need this.