I am facing the same issue and it is not browser specific.
webAuth = new auth0.WebAuth({
domain: ‘DOMAIN’,
clientID: ‘CLIENTID’,
redirectUri: ${HOST}/callback
,
responseType: ‘token id_token’,
scope: ‘openid profile email picture’
})
webAuth.popup.authorize(
{ connection: ‘google-oauth2’ },
(err, authResult) => {
console.log(‘login Google popup, err’, err, authResult)
)