Examine source code of StatsCrop - Site Ranking & Traffic Analysis

{
  "manifest_version": 2,
  "version": "1.0.5",
  "browser_action": {
    "default_title": "StatsCrop",
    "default_icon": "images/icon-128x128.png"
  },
  "background": {
    "scripts": [
      "background/background.js"
    ]
  },
  "content_scripts": [
    {
      "css": [
        "content/content.css"
      ],
      "js": [
        "js/jquery.min.js",
        "content/content.js"
      ],
      "matches": [
        "<all_urls>"
      ],
      "run_at": "document_start"
    }
  ],
  "content_security_policy": "script-src 'self'; object-src 'self'",
  "default_locale": "en",
  "description": "__MSG_description__",
  "icons": {
    "32": "images/icon-32x32.png",
    "64": "images/icon-64x64.png",
    "128": "images/icon-128x128.png"
  },
  "name": "__MSG_name__",
  "permissions": [
    "<all_urls>",
    "storage",
    "tabs",
    "webNavigation"
  ],
  "web_accessible_resources": [
    "images/*",
    "js/*",
    "panel/panel.html",
    "chart/chart.html"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "statscrop.extension@gmail.com"
    }
  }
}