Hello, same problem, they have said (even in the web of rex) that s esoluciona applying the plugin "Inappbrowser" of cranberrygame, but still adding the plugin in c2 and the cordova plugin still does not work the google login through the "rex firebase login" plugin.
Does anyone have a solution? The only thing I can think of is using javascript and html and if the login has been correctly loaded the index.html generated by construct 2, but it is not a definitive solution ...