Examine source code of YouTube Alchemy

{
  "manifest_version": 3,
  "name": "YouTube Alchemy",
  "author": "Tim Macy",
  "version": "10.16",
  "description": "Swiss Army knife for YouTube with customizable features and interface improvements, all controlled via intuitive settings panels.",
  "homepage_url": "https://github.com/TimMacy/YouTubeAlchemy",
  "icons": {
    "16": "icon16.png",
    "32": "icon32.png",
    "48": "icon48.png",
    "64": "icon64.png",
    "128": "icon128.png"
  },
  "permissions": [
    "storage",
    "scripting"
  ],
  "host_permissions": [
    "https://*.youtube.com/*"
  ],
  "background": {
    "scripts": [
      "panels.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "https://*.youtube.com/*"
      ],
      "css": [
        "CascadingStyleSheets.css"
      ],
      "js": [
        "YouTubeAlchemy.js"
      ],
      "run_at": "document_start"
    }
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "setVideoQuality.js",
        "maxVideoSize.js"
      ],
      "matches": [
        "https://*.youtube.com/*"
      ]
    }
  ],
  "action": {
    "default_icon": {
      "16": "icon16.png",
      "48": "icon48.png",
      "128": "icon128.png"
    },
    "default_popup": "popup.html",
    "default_title": "YouTube Alchemy"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "YouTubeAlchemy@TimMacy.com",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}