If I download Firefox and execute it, I get a new set of messages about sandboxing, but worked this time. I used Firefox 92.0.1 in this test.
➜ ./firefox
Gtk-Message: 10:09:32.479: Failed to load module "appmenu-gtk-module"
###!!! [Child][RunMessage] Error: Channel closing: too late to send/recv, messages will be lost
Gtk-Message: 10:09:44.730: Failed to load module "appmenu-gtk-module"
Sandbox: attempt to open unexpected file /proc/net/unix
Sandbox: attempt to open unexpected file /proc/self/maps
Sandbox: attempt to open unexpected file /proc/self/maps
Sandbox: attempt to open unexpected file /proc/net/unix
Sandbox: attempt to open unexpected file /proc/net/unix
Sandbox: attempt to open unexpected file /proc/net/unix
Sandbox: attempt to open unexpected file /proc/net/unix
Sandbox: attempt to open unexpected file /proc/net/unix
Sandbox: attempt to open unexpected file /proc/net/unix
Sandbox: attempt to open unexpected file /proc/self/maps
Sandbox: attempt to open unexpected file /proc/net/unix
Sandbox: attempt to open unexpected file /proc/self/maps
Sandbox: attempt to open unexpected file /proc/net/unix
Sandbox: attempt to open unexpected file /proc/net/unix
Sandbox: attempt to open unexpected file /proc/self/maps
Sandbox: attempt to open unexpected file /proc/self/maps
Sandbox: attempt to open unexpected file /proc/net/unix
Sandbox: attempt to open unexpected file /proc/self/maps
Sandbox: attempt to open unexpected file /proc/net/unix
Sandbox: attempt to open unexpected file /proc/net/unix
Sandbox: attempt to open unexpected file /proc/self/maps
Sandbox: attempt to open unexpected file /proc/net/unix
Sandbox: attempt to open unexpected file /proc/self/maps
Sandbox: attempt to open unexpected file /proc/self/maps
Sandbox: attempt to open unexpected file /proc/self/maps
Sandbox: attempt to open unexpected file /proc/self/maps
Sandbox: attempt to open unexpected file /proc/self/maps
Sandbox: attempt to open unexpected file /proc/self/maps
Sandbox: attempt to open unexpected file /proc/self/maps
Sandbox: attempt to open unexpected file /proc/net/unix
Sandbox: attempt to open unexpected file /proc/net/unix
Sandbox: attempt to open unexpected file /proc/self/maps
Sandbox: attempt to open unexpected file /proc/self/maps
Sandbox: attempt to open unexpected file /proc/self/maps
Sandbox: attempt to open unexpected file /proc/net/unix
Sandbox: attempt to open unexpected file /proc/self/maps
Sandbox: attempt to open unexpected file /proc/net/unix
Sandbox: attempt to open unexpected file /proc/net/unix
Sandbox: attempt to open unexpected file /proc/net/unix
Sandbox: attempt to open unexpected file /proc/self/maps
Sandbox: attempt to open unexpected file /proc/self/maps
Sandbox: attempt to open unexpected file /proc/self/maps
Sandbox: attempt to open unexpected file /proc/self/maps
Sandbox: attempt to open unexpected file /proc/self/maps
Sandbox: attempt to open unexpected file /proc/self/maps
Sandbox: attempt to open unexpected file /proc/self/maps
Sandbox: attempt to open unexpected file /proc/self/maps
Sandbox: attempt to open unexpected file /proc/self/maps
Sandbox: attempt to open unexpected file /proc/self/maps
Sandbox: attempt to open unexpected file /proc/self/maps
Sandbox: attempt to open unexpected file /proc/self/maps
Sandbox: attempt to open unexpected file /proc/self/maps
Sandbox: attempt to open unexpected file /proc/self/maps
Sandbox: attempt to open unexpected file /proc/self/maps
Sandbox: attempt to open unexpected file /proc/self/maps
Sandbox: attempt to open unexpected file /proc/self/maps
Sandbox: attempt to open unexpected file /proc/self/maps
Sandbox: attempt to open unexpected file /proc/self/maps
Sandbox: attempt to open unexpected file /proc/self/maps
Sandbox: attempt to open unexpected file /proc/self/maps
Sandbox: attempt to open unexpected file /proc/self/maps
Sandbox: attempt to open unexpected file /proc/self/maps
Sandbox: attempt to open unexpected file /proc/self/maps
Sandbox: attempt to open unexpected file /proc/self/maps
Sandbox: attempt to open unexpected file /proc/self/maps
Sandbox: attempt to open unexpected file /proc/self/maps
Sandbox: attempt to open unexpected file /proc/self/maps
Sandbox: attempt to open unexpected file /proc/self/maps
Sandbox: attempt to open unexpected file /proc/self/maps
Sandbox: attempt to open unexpected file /proc/self/maps
Sandbox: attempt to open unexpected file /proc/self/maps
Sandbox: attempt to open unexpected file /proc/self/maps
Sandbox: attempt to open unexpected file /proc/net/unix
If I download Firefox and execute it, I get a new set of messages about sandboxing, but worked this time. I used Firefox 92.0.1 in this test. gtk-module"
➜ ./firefox
Gtk-Message: 10:09:32.479: Failed to load module "appmenu-
###!!! [Child][RunMessage] Error: Channel closing: too late to send/recv, messages will be lost
Gtk-Message: 10:09:44.730: Failed to load module "appmenu- gtk-module"
Sandbox: attempt to open unexpected file /proc/net/unix
Sandbox: attempt to open unexpected file /proc/self/maps
Sandbox: attempt to open unexpected file /proc/self/maps
Sandbox: attempt to open unexpected file /proc/net/unix
Sandbox: attempt to open unexpected file /proc/net/unix
Sandbox: attempt to open unexpected file /proc/net/unix
Sandbox: attempt to open unexpected file /proc/net/unix
Sandbox: attempt to open unexpected file /proc/net/unix
Sandbox: attempt to open unexpected file /proc/net/unix
Sandbox: attempt to open unexpected file /proc/self/maps
Sandbox: attempt to open unexpected file /proc/net/unix
Sandbox: attempt to open unexpected file /proc/self/maps
Sandbox: attempt to open unexpected file /proc/net/unix
Sandbox: attempt to open unexpected file /proc/net/unix
Sandbox: attempt to open unexpected file /proc/self/maps
Sandbox: attempt to open unexpected file /proc/self/maps
Sandbox: attempt to open unexpected file /proc/net/unix
Sandbox: attempt to open unexpected file /proc/self/maps
Sandbox: attempt to open unexpected file /proc/net/unix
Sandbox: attempt to open unexpected file /proc/net/unix
Sandbox: attempt to open unexpected file /proc/self/maps
Sandbox: attempt to open unexpected file /proc/net/unix
Sandbox: attempt to open unexpected file /proc/self/maps
Sandbox: attempt to open unexpected file /proc/self/maps
Sandbox: attempt to open unexpected file /proc/self/maps
Sandbox: attempt to open unexpected file /proc/self/maps
Sandbox: attempt to open unexpected file /proc/self/maps
Sandbox: attempt to open unexpected file /proc/self/maps
Sandbox: attempt to open unexpected file /proc/self/maps
Sandbox: attempt to open unexpected file /proc/net/unix
Sandbox: attempt to open unexpected file /proc/net/unix
Sandbox: attempt to open unexpected file /proc/self/maps
Sandbox: attempt to open unexpected file /proc/self/maps
Sandbox: attempt to open unexpected file /proc/self/maps
Sandbox: attempt to open unexpected file /proc/net/unix
Sandbox: attempt to open unexpected file /proc/self/maps
Sandbox: attempt to open unexpected file /proc/net/unix
Sandbox: attempt to open unexpected file /proc/net/unix
Sandbox: attempt to open unexpected file /proc/net/unix
Sandbox: attempt to open unexpected file /proc/self/maps
Sandbox: attempt to open unexpected file /proc/self/maps
Sandbox: attempt to open unexpected file /proc/self/maps
Sandbox: attempt to open unexpected file /proc/self/maps
Sandbox: attempt to open unexpected file /proc/self/maps
Sandbox: attempt to open unexpected file /proc/self/maps
Sandbox: attempt to open unexpected file /proc/self/maps
Sandbox: attempt to open unexpected file /proc/self/maps
Sandbox: attempt to open unexpected file /proc/self/maps
Sandbox: attempt to open unexpected file /proc/self/maps
Sandbox: attempt to open unexpected file /proc/self/maps
Sandbox: attempt to open unexpected file /proc/self/maps
Sandbox: attempt to open unexpected file /proc/self/maps
Sandbox: attempt to open unexpected file /proc/self/maps
Sandbox: attempt to open unexpected file /proc/self/maps
Sandbox: attempt to open unexpected file /proc/self/maps
Sandbox: attempt to open unexpected file /proc/self/maps
Sandbox: attempt to open unexpected file /proc/self/maps
Sandbox: attempt to open unexpected file /proc/self/maps
Sandbox: attempt to open unexpected file /proc/self/maps
Sandbox: attempt to open unexpected file /proc/self/maps
Sandbox: attempt to open unexpected file /proc/self/maps
Sandbox: attempt to open unexpected file /proc/self/maps
Sandbox: attempt to open unexpected file /proc/self/maps
Sandbox: attempt to open unexpected file /proc/self/maps
Sandbox: attempt to open unexpected file /proc/self/maps
Sandbox: attempt to open unexpected file /proc/self/maps
Sandbox: attempt to open unexpected file /proc/self/maps
Sandbox: attempt to open unexpected file /proc/self/maps
Sandbox: attempt to open unexpected file /proc/self/maps
Sandbox: attempt to open unexpected file /proc/self/maps
Sandbox: attempt to open unexpected file /proc/self/maps
Sandbox: attempt to open unexpected file /proc/self/maps
Sandbox: attempt to open unexpected file /proc/net/unix
###!!! [Parent] [MessageChannel ] Error: (msgtype= 0x390077, name=PContent: :Msg_DestroyBro wsingContextGro up) Closed channel: cannot send/recv
###!!! [Parent] [MessageChannel ] Error: (msgtype= 0x390077, name=PContent: :Msg_DestroyBro wsingContextGro up) Closed channel: cannot send/recv
###!!! [Parent] [MessageChannel ] Error: (msgtype= 0x390077, name=PContent: :Msg_DestroyBro wsingContextGro up) Closed channel: cannot send/recv
###!!! [Parent] [MessageChannel ] Error: (msgtype= 0x390077, name=PContent: :Msg_DestroyBro wsingContextGro up) Closed channel: cannot send/recv
###!!! [Child] [MessageChannel ] Error: (msgtype= 0x23002F, name=PBrowser: :Msg___ delete_ _) Channel closing: too late to send/recv, messages will be lost
###!!! [Parent] [RunMessage] Error: Channel closing: too late to send/recv, messages will be lost