Examine source code of isTrust

{
  "manifest_version": 2,
  "name": "isTrust",
  "description": "__MSG_description__",
  "version": "4.4.1",
  "icons": {
    "16": "icons/16.png",
    "32": "icons/32.png",
    "48": "icons/48.png",
    "128": "icons/128.png"
  },
  "default_locale": "en",
  "permissions": [
    "activeTab",
    "contextMenus",
    "history",
    "http://*/*",
    "https://*/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{431b3adb-f3bf-46e8-8542-151be2dc00c4}",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "background": {
    "persistent": false,
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_title": "isTrust",
    "default_popup": "popup.html"
  }
}