Examine source code of Berifai

{
  "name": "Berifai",
  "version": "1.0",
  "description": "Verify the authenticity of websites",
  "manifest_version": 2,
  "browser_action": {
    "default_icon": "images/icon.png",
    "default_popup": "popup.html"
  },
  "background": {
    "scripts": [
      "popup.js"
    ],
    "persistent": false
  },
  "permissions": [
    "activeTab",
    "tabs"
  ]
}