This brief tutorial will show you how to go about analyzing a raw binary firmware image in Ghidra.
I was recently interested in reversing some older Cisco IOS images. Those images come in the form of a single binary blob, without any sort of ELF, Mach-o, or PE header to describe the binary.
While I am using Cisco IOS Images in this example, the same process should apply to other Raw Binary Firmware Images.