Examine source code of Annoying Dog

{
  "name": "Annoying Dog",
  "version": "0.0.1",
  "description": "Infinite Annoying Dog in your browser!",
  "manifest_version": 2,
  "icons": {
    "16": "assets/image/nyanlogo16.png",
    "32": "assets/image/nyanlogo32.png",
    "64": "assets/image/nyanlogo64.png",
    "128": "assets/image/nyanlogo128.png"
  },
  "browser_action": {
    "default_popup": "index.html",
    "browser_style": true
  },
  "chrome_url_overrides": {
    "newtab": "index.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{17da3d36-2c2e-4606-b68d-649aa6cf5cb3}"
    }
  }
}