Examine source code of VK Informer

{
  "manifest_version": 2,
  "name": "__MSG_extName__",
  "description": "__MSG_extDesc__",
  "short_name": "Vk notice",
  "version": "5.3.7resigned1",
  "default_locale": "ru",
  "homepage_url": "https://vk.com/club90041499",
  "author": "Александр Козак",
  "developer": {
    "name": "Александр Козак",
    "url": "https://vk.com/id45421694"
  },
  "icons": {
    "128": "BackgroundApp/img/icon128.png"
  },
  "options_page": "OptionsApp/index.html",
  "background": {
    "page": "BackgroundApp/background.html"
  },
  "browser_action": {
    "default_title": "__MSG_extName__",
    "default_icon": "BackgroundApp/img/icon38-off.png",
    "default_popup": "PopupApp/popup.html"
  },
  "content_scripts": [
    {
      "js": [
        "VkApp/VkOpenapi.js"
      ],
      "matches": [
        "*://*/*"
      ],
      "all_frames": true
    }
  ],
  "permissions": [
    "*://vk.com/",
    "*://vk.com/*",
    "*://*.vk.com/*",
    "background",
    "storage",
    "alarms",
    "tabs"
  ],
  "content_security_policy": "script-src 'self' https://vk.com; object-src 'self'",
  "browser_specific_settings": {
    "gecko": {
      "id": "{f22b3827-292a-40c9-8c6e-d9350e5af369}"
    }
  }
}