Examine source code of YouTube Auto Like

{
  "name": "__MSG_appName__",
  "version": "4.1.0",
  "manifest_version": 2,
  "description": "__MSG_appDesc__",
  "icons": {
    "16": "images/icon-16.png",
    "32": "images/icon-32.png",
    "48": "images/icon-48.png",
    "128": "images/icon-128.png"
  },
  "default_locale": "en",
  "permissions": [
    "activeTab",
    "storage"
  ],
  "browser_action": {
    "default_icon": {
      "19": "images/icon-19.png",
      "38": "images/icon-38.png"
    },
    "default_title": "YouTube Auto Like",
    "default_popup": "options.html"
  },
  "content_scripts": [
    {
      "matches": [
        "*://youtube.com/*",
        "*://*.youtube.com/*"
      ],
      "js": [
        "scripts/constants.js",
        "scripts/modules/option-manager.js",
        "scripts/modules/miscellaneous.js",
        "scripts/modules/metaliker.js",
        "scripts/modules/liker-paper.js",
        "scripts/modules/liker-grid.js",
        "scripts/content.js"
      ],
      "run_at": "document_end"
    }
  ],
  "background": {
    "scripts": [
      "scripts/background.js",
      "scripts/modules/option-manager.js",
      "scripts/constants.js"
    ]
  },
  "options_ui": {
    "page": "options.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{21b3b6ae-1582-4db8-84b3-b6cc45a4a92c}"
    }
  }
}