Also encountered on Firefox 102.3.0 while listening to music using Spotify's web portal ( https://open.spotify.com/ ).
```
Sandbox: attempt to open unexpected file /sys/devices/system/cpu/cpu0/cache/index2/size
Sandbox: attempt to open unexpected file /sys/devices/system/cpu/cpu0/cache/index3/size
Sandbox: attempt to open unexpected file /sys/devices/system/cpu/present
Sandbox: attempt to open unexpected file /sys/devices/system/cpu
Sandbox: unexpected multiple open of file /proc/cpuinfo
```
Around the same time, the browser tab became graphically unresponsive (blank contents).
Also encountered on Firefox 102.3.0 while listening to music using Spotify's web portal ( https:/ /open.spotify. com/ ).
``` system/ cpu/cpu0/ cache/index2/ size system/ cpu/cpu0/ cache/index3/ size system/ cpu/present system/ cpu
Sandbox: attempt to open unexpected file /sys/devices/
Sandbox: attempt to open unexpected file /sys/devices/
Sandbox: attempt to open unexpected file /sys/devices/
Sandbox: attempt to open unexpected file /sys/devices/
Sandbox: unexpected multiple open of file /proc/cpuinfo
```
Around the same time, the browser tab became graphically unresponsive (blank contents).