Examine source code of YouTube Chapters Navigation

{
  "name": "Chapters Navigation for YouTube",
  "version": "3.1.0",
  "description": "Allows to navigate YouTube video chapters using in-player widgets and shows chapter titles as overlays.",
  "manifest_version": 2,
  "icons": {
    "16": "images/icon16.png",
    "48": "images/icon48.png",
    "128": "images/icon128.png"
  },
  "permissions": [
    "notifications",
    "storage",
    "*://*.youtube.com/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.youtube.com/*"
      ],
      "css": [
        "css/content.css"
      ],
      "js": [
        "js/content.js"
      ]
    }
  ],
  "web_accessible_resources": [
    "js/modules/*.mjs"
  ],
  "options_ui": {
    "page": "options/options.html",
    "browser_style": true
  },
  "commands": {
    "next-chapter": {
      "suggested_key": {
        "default": "Ctrl+Period"
      },
      "description": "Next chapter"
    },
    "prev-chapter": {
      "suggested_key": {
        "default": "Ctrl+Comma"
      },
      "description": "Previous chapter"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{0c79166b-c73b-46d4-81fa-536546d18ede}"
    }
  }
}