Examine source code of BitMEEEX USD Display

{
  "manifest_version": 2,
  "name": "BitMEEEX USD Display",
  "description": "Get some sanity into your gambling. Shows all prices in US Dollars instead of Bitcoin (XBT Symbol). Runs on bitmex.com only.",
  "version": "0.3",
  "author": "Trading Joe",
  "content_scripts": [
    {
      "matches": [
        "https://www.bitmex.com/*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "permissions": [
    "activeTab"
  ],
  "icons": {
    "16": "icons/icon-16.png",
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png",
    "256": "icons/icon-256.png",
    "512": "icons/icon-512.png"
  },
  "offline_enabled": false
}