Application crashes when firebase.analytics(); is called from within an iframe in macOS Safari.

Regression of or otherwise related to #631 ?

import * as firebase from 'firebase/app'; import 'firebase/analytics'; const app = firebase.initializeApp({...); const analytics = firebase.analytics(); 

• Operating System version: macOS Mojave
• Browser version: Safari 13.0.3
• Firebase SDK version: firebase@7.5.0
• Firebase Product: @firebase/analytics@0.2.7