Examine source code of Image Converter

{
  "minimum_chrome_version": "38",
  "browser_action": {
    "default_icon": {
      "19": "assets/icon_16.png",
      "38": "assets/icon_128.png"
    }
  },
  "name": "HTML5 Image Converter",
  "short_name": "Your Free Image Converter and draw faster",
  "icons": {
    "16": "assets/icon_16.png",
    "128": "assets/icon_128.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "version": "1.5.2resigned1",
  "manifest_version": 2,
  "content_security_policy": "script-src 'self'; img-src * data:; style-src 'self' 'unsafe-inline'; font-src *; default-src 'self'",
  "permissions": [
    "tabs",
    "activeTab",
    "downloads",
    "contextMenus",
    "<all_urls>"
  ],
  "description": "An essential and practical application for free-hand drawing and for the conversion of images in multiple formats.",
  "browser_specific_settings": {
    "gecko": {
      "id": "jid1-FRMyunaqimPPAg@jetpack"
    }
  }
}