Examine source code of Twitch co-stream

{
  "author": "Paris",
  "browser_specific_settings": {
    "gecko": {
      "id": "alt.yk-doictod@yopmail.com",
      "strict_min_version": "126.0"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "action": {
    "default_icon": "images/icon.png",
    "default_popup": "popup/popup.html",
    "default_title": "Twitch co-stream"
  },
  "content_scripts": [
    {
      "js": [
        "addStreamerFrame.js",
        "removeStreamerFrame.js",
        "foreground.js"
      ],
      "css": [
        "coopstream.css"
      ],
      "matches": [
        "https://www.twitch.tv/*",
        "https://twitch.tv/*"
      ]
    }
  ],
  "default_locale": "en",
  "description": "__MSG_appDesc__",
  "icons": {
    "16": "images/icon.png",
    "32": "images/icon32.png",
    "48": "images/icon48.png",
    "128": "images/icon128.png"
  },
  "manifest_version": 3,
  "name": "__MSG_appName__",
  "options_page": "options/options.html",
  "permissions": [
    "storage"
  ],
  "short_name": "Twitch co-stream",
  "version": "1.0.6"
}