Open the app at fogo.howtofirebase.com.
Sourcemaps are currently broken in Chrome for Fogo as of July 2018.
This is best done in Firefox.
Right-click inspect element and select the Debugger tab. Then click command + P to search for and open two files:
observers/images.observer.js,- and
queries/images.query.js.
{% embed data="{"url":"https://youtu.be/eOXlUYruPjw\",\"type\":\"video\",\"title\":\"Walkthrough: Cloud Firestore","description":"Full-Stack Firebase:\n\nhttps://www.fullstackfirebase.com/cloud-firestore/walkthrough","icon":{"type":"icon","url":"https://www.youtube.com/yts/img/favicon\_144-vfliLAfaB.png\",\"width\":144,\"height\":144,\"aspectRatio\":1},\"thumbnail\":{\"type\":\"thumbnail\",\"url\":\"https://i.ytimg.com/vi/eOXlUYruPjw/maxresdefault.jpg\",\"width\":1280,\"height\":720,\"aspectRatio\":0.5625},\"embed\":{\"type\":\"player\",\"url\":\"https://www.youtube.com/embed/eOXlUYruPjw?rel=0&showinfo=0\",\"html\":\"<div style=\"left: 0; width: 100%; height: 0; position: relative; padding-bottom: 56.2493%;\"><iframe src=\"https://www.youtube.com/embed/eOXlUYruPjw?rel=0&showinfo=0\\\" style=\"border: 0; top: 0; left: 0; width: 100%; height: 100%; position: absolute;\" allowfullscreen scrolling=\"no\"></iframe>","aspectRatio":1.7778}}" %}
