Examine source code of bugfight

{
  "browser_action": {
    "default_icon": "/img/icon-48.png"
  },
  "content_scripts": [
    {
      "css": [
        "/css/style.css"
      ],
      "js": [
        "/js/core.js",
        "/js/purify.min.js"
      ],
      "matches": [
        "https://*.bitefight.gameforge.com/*"
      ],
      "run_at": "document_start"
    }
  ],
  "description": "The first BiteFight bot for Google Chrome and Firefox! Automate your adventure!",
  "icons": {
    "16": "/img/icon-16.png",
    "48": "/img/icon-48.png",
    "128": "/img/icon-128.png"
  },
  "manifest_version": 2,
  "name": "BiteFight",
  "permissions": [
    "https://*.bitefight.gameforge.com/*",
    "https://*.tote.hu/"
  ],
  "short_name": "BiteFight",
  "update_url": "https://clients2.google.com/service/update2/crx",
  "version": "3.6.5",
  "web_accessible_resources": [
    "/html/frame.html",
    "/img/icon-48.png",
    "/img/btn.png"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{bfa376f6-0f39-466f-984d-e09837934086}"
    }
  }
}