Create signal-desktop.profile

Profile for signal-desktop (standalone electron app, see https://github.com/WhisperSystems/Signal-Desktop)

etc/signal-desktop.profile

@@ -0,0 +1,35 @@
+# Firejail profile for sinal-desktop
+# This file is overwritten after every install/update
+# Persistent local customizations
+include /etc/firejail/signal-desktop.local
+# Persistent global definitions
+include /etc/firejail/globals.local
+
+noblacklist ~/.config/Signal
+
+include /etc/firejail/disable-common.inc
+include /etc/firejail/disable-devel.inc
+include /etc/firejail/disable-programs.inc
+
+mkdir ~/.config/Signal
+whitelist ${DOWNLOADS}
+whitelist ~/.config/Signal
+include /etc/firejail/whitelist-common.inc
+
+caps.drop all
+netfilter
+nodvd
+nogroups
+nonewprivs
+noroot
+notv
+protocol unix,inet,inet6,netlink
+seccomp
+shell none
+
+disable-mnt
+private-dev
+private-tmp
+
+noexec ${HOME}
+noexec /tmp