Custom Domains / Hosting Firebase

Is there any way to link my app web to a custom domain?
I’m thinking of buying a domain from Google Domains but I don’t know how to link it to my app web, I’m going to use hosting from firebase

Take a look into Hostinger. Instead of redirecting your current appgyver url to a new domain, you can just publish the .zip file to a web provider. When you go to build your app you can export the web app which is a .zip file. You can either work out how to publish this online, or you can use options like Hostinger that let you buy a domain and host t he .zip file.

I just did this as codelessfix.app