Error '403 disallowed_useragent' logging to google via angularfire on a mobile browser

I am developing a project with angularfire2 v4.0.0-rc.2 in angular4 and publishing it on firebase.

The logins with facebook and google are both working on the desktop browser and on a native android app.

When I try to login within chrome via mobile browser, I got the following error:

I've found many post about google blocking the access by webViews but none give a really answer about how to fix the problem without workarounds not specific to firebase.

The error occurs either using angularfire signIn with popup and redirect.

Any thoughts?

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