I just tried updating my emby server truenas plugin from 4.6 to 4.7.1 and I'm now seeing an Alert that the Check for plugin upates has failed. this could be because i use a mount point to redirect the emby server configuration folder to a directory outside the jail which does not have the correct permissions now for some reason(i have been using this method to perserve my emby settings and metadata for years now without permission issues)
@Vidman Updating an existing install is more akin to the regular freebsd install instructions. You should open a shell in the jail you want to update and install the latest emby package like you would on freebsd.
pkg add -f https://github.com/MediaBrowser/Emby.Releases/releases/download/4.7.5.0/emby-server-freebsd13_4.7.5.0_amd64.pkg
Or freebsd12 if your jail is version 12.