I\'m just trying to do a simple set-up for hosting on firebase. I\'m following the instructions at (https://www.firebase.com/docs/hosting/guide/deploying.html) but I\'m miss
I had this exact same error. I fixed it by changing the path variable to include firebase.
Try finding firebase.cmd on Windows through C:\Users\myname\AppData\Roaming\npm. I couldn't find firebase.exe, which is where I got confused. Looking at your screenshot, I can see where the path is saved.
Just search for the firebase.cmd and add it to your %PATH% C:\Users\myname\AppData\Roaming\npm
. Then restart and try again: firebase should be a valid command
Sorry this is a year late and hope this helps someone.