Examine source code of Pixel Piranhas

{
  "manifest_version": 2,
  "name": "Pixel Piranhas",
  "version": "1.2",
  "description": "Don't like a web page? Let a pack of wild cursors tear it apart, at the touch of a button.",
  "icons": {
    "64": "assets/icon.png"
  },
  "permissions": [
    "activeTab",
    "<all_urls>",
    "storage"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "p5.min.js",
        "content.js",
        "sketch.js"
      ]
    }
  ],
  "web_accessible_resources": [
    "p5.min.js",
    "sketch.js",
    "assets/1.png",
    "assets/cursor.png"
  ],
  "browser_action": {
    "default_icon": "assets/icon.png"
  },
  "options_ui": {
    "page": "options.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{07b019dc-e200-4b7f-9807-d98f36d18aa6}"
    }
  }
}