The MSX Firstie comes in a .bin format,

but my MSX Emulator could not read it.

What does it take to open this file?

Thanks!

you need to put that bin file into disk image and then execute BLOAD"FIRSTIE.BIN",R (if I remember correctly)
gorgh

there's a ready disk image on pouet:
https://www.pouet.net/prod.php?which=89657