Examine source code of Foxy SEO Tool

{
  "name": "Foxy SEO Tool",
  "description": "__MSG_extensionDescription__",
  "version": "2.0.3resigned1",
  "default_locale": "en",
  "manifest_version": 2,
  "homepage_url": "http://www.foxyseotool.com/",
  "icons": {
    "16": "/icons/foxyseotool-16.png",
    "32": "/icons/foxyseotool-32.png",
    "48": "/icons/foxyseotool-48.png",
    "64": "/icons/foxyseotool-64.png",
    "96": "/icons/foxyseotool-96.png"
  },
  "applications": {
    "gecko": {
      "id": "foxyseotool@foxyseotool.com",
      "strict_min_version": "48.0"
    }
  },
  "permissions": [
    "activeTab",
    "storage"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://*.google.com/alerts*"
      ],
      "js": [
        "/content/google.alerts.js"
      ],
      "runAt": "document_end"
    },
    {
      "matches": [
        "*://adwords.google.com/ko/KeywordPlanner/*"
      ],
      "js": [
        "/content/google.adwords.js"
      ],
      "runAt": "document_end"
    },
    {
      "matches": [
        "*://*.ctrlq.org/sandbox/*"
      ],
      "js": [
        "/content/ctrlq.org.js"
      ],
      "runAt": "document_end"
    },
    {
      "matches": [
        "*://*.wordtracker.com/*"
      ],
      "js": [
        "/content/wordtracker.com.js"
      ],
      "runAt": "document_end"
    },
    {
      "matches": [
        "*://*.internetmarketingninjas.com/seo-tools/keyword-density/*"
      ],
      "js": [
        "/content/internetmarketingninjas.com.js"
      ],
      "runAt": "document_end"
    },
    {
      "matches": [
        "*://*.dnsbl.info/*"
      ],
      "js": [
        "/content/dnsbl.info.js"
      ],
      "runAt": "document_end"
    }
  ],
  "options_ui": {
    "page": "/options/options.html",
    "browser_style": true
  },
  "browser_action": {
    "default_icon": {
      "16": "/icons/foxyseotool-16.png",
      "32": "/icons/foxyseotool-32.png",
      "64": "/icons/foxyseotool-64.png"
    },
    "default_title": "Foxy SEO Tool",
    "default_popup": "/popup/menu-main.html",
    "browser_style": true
  }
}