Many users are running the default command that installs the BIOS bootcode overtop of their EFI ESP partition and getting an unbootable system.
A few minor suggestions to be more precise.
I'd use a colon at the end of the sentence.
Same here for the EFI instructions.
No sentence stop (or even an exclamation mark) here?
I think you need to mention "gpart show" here, so that users know what you are referring to when talking about freebsd-boot (where is that output coming from).