Examine source code of MyUtility

{
  "manifest_version": 2,
  "short_name": "Bonk",
  "name": "Horni get BONKED",
  "version": "1.0",
  "icons": {
    "16": "resource/img/bonk16.png",
    "48": "resource/img/bonk48.png",
    "128": "resource/img/bonk128.png"
  },
  "description": "you mere horny thou shall not continue!",
  "permissions": [
    "activeTab"
  ],
  "content_scripts": [
    {
      "js": [
        "content.js"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "browser_action": {
    "default_popup": "popup.html"
  }
}