Examine source code of Smart Drawing

{
  "version": "0.1.1resigned1",
  "manifest_version": 2,
  "name": "Smart Drawing",
  "short_name": "smartdrawing",
  "web_accessible_resources": [
    "data/icons/*"
  ],
  "background": {
    "page": "lib/chrome/background.html"
  },
  "permissions": [
    "storage",
    "https://www.autodraw.com/*"
  ],
  "homepage_url": "http://mybrowseraddon.com/smart-drawing.html",
  "description": "Easy and fast drawing with smart drawing addon (uses Google AutoDraw)",
  "browser_action": {
    "default_icon": "data/icons/32.png",
    "default_title": "Smart Drawing"
  },
  "content_scripts": [
    {
      "all_frames": false,
      "run_at": "document_start",
      "js": [
        "data/panel/index.js"
      ],
      "css": [
        "data/panel/index.css"
      ],
      "matches": [
        "*://www.autodraw.com/*"
      ]
    }
  ],
  "icons": {
    "16": "data/icons/16.png",
    "32": "data/icons/32.png",
    "48": "data/icons/48.png",
    "64": "data/icons/64.png",
    "128": "data/icons/128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{abac6e5a-a735-41ac-9af9-a067ca0b7d4b}"
    }
  }
}