Examine source code of YouTube Chapter Toggle

{
  "manifest_version": 2,
  "name": "YouTube Chapter Toggle",
  "version": "1.1",
  "description": "Hide or show YouTube chapter markers.",
  "permissions": [
    "storage",
    "tabs"
  ],
  "browser_action": {
    "default_title": "YouTube Chapter Toggle",
    "default_icon": {
      "16": "icons/icon16.png",
      "32": "icons/icon32.png",
      "48": "icons/icon48.png"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "https://www.youtube.com/*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "youtube-chapter-toggle@example.com",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}