enable TSL decryption in wireshark

[In+Qui]

The title says everything. I followed the following guide https://gitlab.com/wireshark/wireshark/-/wikis/TLS#tls-decryption, but the log file is always empty. Here are some information:

/etc/environment output

# START KALI-DEFAULTS CONFIG
# Everything from here and until STOP KALI-DEFAULTS CONFIG
# was installed by the kali-defaults package, and it will
# be removed if ever the kali-defaults package is removed.
# If you want to disable a line, please do NOT remove it,
# as it would be added back when kali-defaults is upgraded.
# Instead, comment the line out, and your change will be
# preserved across upgrades.
PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/local/games:/usr/games
COMMAND_NOT_FOUND_INSTALL_PROMPT=1
POWERSHELL_TELEMETRY_OPTOUT=1
DOTNET_CLI_TELEMETRY_OPTOUT=1
SSLKEYLOGFILE=/home/x000/key.log
# STOP KALI-DEFAULTS CONFIG


firefox version

Mozilla Firefox 78.14.0esr 20210901125844 20210901125844



log file permission

-rw-rw-rw- 1 x000 x000 0 Nov 1 08:39 key.log


kali version

Linux x000 5.14.0-kali2-amd64 #1 SMP Debian 5.14.9-2kali1 (2021-10-04) x86_64 GNU/Linux


Is there something missing?