Examine source code of myGIVT.com

{
  "author": "__MSG_manifestAuthor__",
  "background": {
    "scripts": [
      "/js/jquery-3.2.1.min.js",
      "/js/background.js"
    ]
  },
  "browser_action": {
    "default_icon": "images/icon16_gray.png"
  },
  "content_scripts": [
    {
      "js": [
        "/js/content.js"
      ],
      "matches": [
        "http://www.google.com/*"
      ],
      "run_at": "document_end"
    }
  ],
  "description": "__MSG_manifestDescription__",
  "homepage_url": "https://mygivt.com/",
  "icons": {
    "16": "images/icon16.png",
    "48": "images/icon48.png",
    "128": "images/icon128.png"
  },
  "default_locale": "cs",
  "manifest_version": 2,
  "name": "__MSG_manifestName__",
  "permissions": [
    "tabs",
    "http://*/*",
    "https://*/*",
    "activeTab",
    "storage"
  ],
  "version": "1.1.4resigned1",
  "web_accessible_resources": [
    "toolbar/*",
    "layout/*"
  ],
  "applications": {
    "gecko": {
      "id": "@mygivt-toolbar-cz"
    }
  }
}