Follow below steps to get your Firebae Project ID :
Step 1 : Go to Firebase
Step 2 : If you have a Firebase account, Sign in, else create an account
Step 3 : Click on Get Started
Step 4 : Select your project
Step 5 : Click on the cogwheel icon next to Project Overview.
Step 6 : Click on Project settings.Step 7 : Under the Your Project section, you will find your Project ID. Copy the Project ID to your clipboard.Step 8 : Paste the copied Project ID in the respective field on the creator software.