Examine source code of PunyCode Domain Detection

{
  "background": {
    "scripts": [
      "js/background.js"
    ]
  },
  "content_scripts": [
    {
      "js": [
        "js/punycode.js",
        "js/content-main.js"
      ],
      "matches": [
        "http://*/*",
        "https://*/*"
      ]
    }
  ],
  "description": "This extension attempts to detect PunyCode domain phishing attack",
  "icons": {
    "32": "icon-32.png",
    "128": "icon-128.png"
  },
  "manifest_version": 2,
  "applications": {
    "gecko": {
      "id": "punycode@detection",
      "strict_min_version": "57.0"
    }
  },
  "name": "PunyCode Domain Detection (Alpha)",
  "page_action": {
    "default_icon": "icon-128.png",
    "default_popup": "popup.html"
  },
  "permissions": [
    "activeTab",
    "notifications"
  ],
  "version": "0.0.5resigned1"
}