Examine source code of Vitality Notifier

{
  "manifest_version": 2,
  "author": "Shytoos",
  "name": "Vitality Notifier",
  "short_name": "Vitality Notifier",
  "description": "__MSG_appDesc__",
  "homepage_url": "https://shytoos.fr",
  "version": "1.0.1resigned1",
  "default_locale": "en",
  "background": {
    "persistent": true,
    "scripts": [
      "js/jquery.js",
      "js/jquery.browser.min.js",
      "js/main.js"
    ]
  },
  "browser_action": {
    "default_title": "Vitality Notifier",
    "default_icon": "images/icon_top.png"
  },
  "icons": {
    "128": "images/icon.png"
  },
  "permissions": [
    "tabs",
    "*://extension.vitality.gg/*",
    "background",
    "notifications",
    "storage"
  ],
  "options_ui": {
    "page": "settings/options.html",
    "open_in_tab": true
  },
  "update_url": "https://clients2.google.com/service/update2/crx",
  "browser_specific_settings": {
    "gecko": {
      "id": "{e9b8f4f7-e5e0-486b-bd32-0bd0ea9d949e}"
    }
  }
}