[Bug 1983010]

[Linottejustin]

i'm on debian 12, i have Firefox 115.14.0esr (64-bit) already installed, i just installed firefox 129.0.2-1 from snap
i tried to launch from my root account and got this and didn't worked: 
root at myname-debian:~# snap run firefox
mkdir: cannot create directory ‘/run/user/0’: Permission denied
Error: no DISPLAY environment variable specified

when switched back to my normal user account, it worked for the first
time from the terminal, but i got this (changed my real name) :

myname at myname-debian:~$ snap run firefox
Importing existing firefox profiles from /home/myname/.mozilla/firefox
Found default profile: 4qwx9y8h.default-esr
Import done in 0.510 s
Gtk-Message: 17:16:58.323: Not loading module "atk-bridge": The functionality is provided by GTK natively. Please try to not load it.
[10965] Sandbox: attempt to open unexpected file /sys/devices/system/cpu/cpu0/cache/index2/size
[10965] Sandbox: attempt to open unexpected file /sys/devices/system/cpu/cpu0/cache/index3/size
[10965] Sandbox: attempt to open unexpected file /sys/devices/system/cpu/present
[10965] Sandbox: attempt to open unexpected file /sys/devices/system/cpu
[10965] Sandbox: attempt to open unexpected file /sys/devices/system/cpu/possible
[10965] Sandbox: attempt to open unexpected file /sys/devices/system/cpu/cpu0/topology/core_cpus
[10965] Sandbox: attempt to open unexpected file /sys/devices/system/cpu/cpu0/topology/thread_siblings

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https://bugs.launchpad.net/bugs/1983010

Title:
  Sandbox: attempt to open unexpected file
  /sys/devices/system/cpu/cpu0/cache/index2/size

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