Hi. What these bytes mean? If this is a hash of firmware, where can I find revisions hashes to compare with installed on device?
It’s the git revision for the source code of that release.
you can append it to this url:
https://github.com/trezor/trezor-firmware/commit/<hex goes here>
then if you click “Browse files” on the right side, you can browse all of the sources as they looked at that time.