Stockfish Chess Engine

manifest.json

{
  "update_url": "http://clients2.google.com/service/update2/crx",
  "name": "Stockfish Chess Engine",
  "description": "Chess analysis engine",
  "version": "2.3.1.2",
  "manifest_version": 2,
  "icons": {
    "128": "stockfish.png"
  },
  "app": {
    "urls": [
      "http://chesseng.herokuapp.com/"
    ],
    "launch": {
      "web_url": "http://chesseng.herokuapp.com/"
    }
  }
}