Examine source code of World Time Search

{
  "manifest_version": 2,
  "name": "World Time Search",
  "description": "TimeZone Tab brings you an easy-to-use time zone converter and a Yahoo - powered new tab search—built right into your new tab for instant access.",
  "version": "1.0.0.0",
  "browser_action": {
    "browser_style": true,
    "default_title": "World Time Search",
    "default_icon": {
      "128": "media/icon128.png"
    }
  },
  "icons": {
    "128": "media/icon128.png"
  },
  "permissions": [
    "storage",
    "contextMenus"
  ],
  "chrome_url_overrides": {
    "newtab": "newtab/index.html"
  },
  "background": {
    "scripts": [
      "taskWorkers/bgworker.js",
      "taskWorkers/storageHandler.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{70ffc0ad-667f-4879-8ab8-db0a085fc493}"
    }
  }
}