Examine source code of Comment Critters

{
  "description": "Displays HTML comments directly on the page with cute characters.",
  "manifest_version": 2,
  "name": "Comment Critters",
  "version": "1.1resigned1",
  "icons": {
    "32": "img/critter1_active.png"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "js/jquery.js",
        "js/critter.js"
      ],
      "css": [
        "css/styles.css"
      ]
    }
  ],
  "permissions": [
    "activeTab"
  ],
  "web_accessible_resources": [
    "img/critter1_active.png",
    "img/critter1_rest.png",
    "img/critter2_active.png",
    "img/critter2_rest.png",
    "img/critter3_active.png",
    "img/critter3_rest.png",
    "img/critter4_active.png",
    "img/critter4_rest.png",
    "img/critter5_active.png",
    "img/critter5_rest.png",
    "img/critter6_active.png",
    "img/critter6_rest.png"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{80ef5425-4687-4d93-b33c-f768fb32e7d6}"
    }
  }
}