As the blog post points out, this requires coordinating Wireshark's "(Pre-)Master Secret Log filename" / tls.keylog_file preference with you web browser's environment, so a while back I wrote a Wireshark Lua plugin that automates as much of this as possible. It pops up a window that lets you launch Chrome or Firefox with the SSLKEYLOGFILE environment variable set to the correct value: https://gitlab.com/-/snippets/2156054