Support for Chrome App OAuth2

[godd9170]

I'm trying to use the chrome.identity api to authenticate within a chrome extension. The only way to use chrome.identity however, is to register a chrome app as opposed to a standard web application like this:

Unfortunately this type of registration doesn't give you a client secret, which appears to be a requirement in the docs here.

VS.

Is it even possible to oauth2 without a client secret?

[omab]

I'm not familiar with Chrome App authentication flow, but if it's close to OAuth2, it shouldn't be hard to implement by ignoring the some fields, there's any docs regarding this flow?