steam.profile: fix Proton 5.13+

Starting with version 5.13 Proton internally uses bubblewrap to create a
container for the game. To make this work with firejail we need to allow
these 4 additional syscalls.

fixes: https://github.com/netblue30/firejail/issues/4366
fixes: https://github.com/netblue30/firejail/issues/4686

1 files changed, 2 insertions, 1 deletions

diff --git a/etc/profile-m-z/steam.profile b/etc/profile-m-z/steam.profile
index b0be8a517..e3f353416 100644
--- a/etc/profile-m-z/steam.profile
+++ b/etc/profile-m-z/steam.profile
@@ -143,7 +143,8 @@ novideo
 protocol unix,inet,inet6,netlink
 # seccomp sometimes causes issues (see #2951, #3267).
 # Add 'ignore seccomp' to your steam.local if you experience this.
-seccomp !ptrace
+# mount, name_to_handle_at, pivot_root and umount2 are used by Proton >= 5.13
+seccomp !mount,!name_to_handle_at,!pivot_root,!ptrace,!umount2
 shell none
 # tracelog breaks integrated browser
 #tracelog