I too am using sandboxie and I too suspected it may have been sandboxie, given it uses the user "anonamous logon"; I am not using any server, IIS or SQL software, and it tends to happen after loading...

TCP fast open is another security threat: TCP FastOpen Security : The Grumpy Troll

Performance yes, but TLS False start does not improve security, it does the opposite; Firefox Hardening Guide 2018

Disable TLS False Start

This is because it does not allow the client to fully...