I want to create a chrome extension and use the Sheets API to do something, so I have reviewed two tutorial.

this article

https://medium.com/swlh/oauth2-openid-chrome-extension-login-system-29285323882f

is using lauchWebAuthFlow to achieve the Authentication, but using Web Application as Application Type.

And this video,

https://www.youtube.com/watch?v=5grkEnYytF4

is using getAuthToken, but the Application Type is Chrome App.

I want to ask when to use Chrome App and when to use Web Application?

For further asking, I want to ask if I want to use my chrome extension not only in Google Chrome but at least with Microsoft Edge, which Authentication method is recommended to do, and if I am using that method, how I can use that method to use the Sheet API.

Thank you.