-e: see title, scene stays silent, message about changed behaviour being logged in console
--regression with Chrome, not Unity

-repro:
--open attached project
--build and run in Chrome66 (current dev release)
--NOTICE the scene stays silent and message being logged:

The AudioContext was not allowed to start. It must be resume (or created) after a user gesture on the page. https://goo.gl/7K7WLu

Workaround: See https://forum.unity.com/threads/chrome-on-the-dev-branch-version-66-may-block-audio-for-unity-webgl.517758/#post-3463792