Examine source code of Spotter

{
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "manifest_version": 2,
  "name": "Spotter",
  "description": "Spotter Extension",
  "version": "1.2resigned1",
  "permissions": [
    "tabs",
    "<all_urls>",
    "downloads",
    "http://*/*",
    "https://*/*",
    "storage"
  ],
  "browser_action": {
    "default_icon": "img/spotter.png",
    "default_title": "Spotter"
  },
  "content_scripts": [
    {
      "all_frames": true,
      "js": [
        "jquery-2.1.1.min.js",
        "screenshot.js"
      ],
      "matches": [
        "http://*/*",
        "https://*/*",
        "file://*/*"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{1f77fd0d-b0d2-4239-890d-2aaf43bbd12f}"
    }
  }
}