Examine source code of Fallen London Library

{
  "manifest_version": 2,
  "name": "Fallen London Library",
  "description": "This extension for Fallen London adds a 'Library' category to your inventory.",
  "version": "1.0.2resigned1",
  "content_scripts": [
    {
      "matches": [
        "http://fallenlondon.storynexus.com/Gap/Load*"
      ],
      "js": [
        "content-script.js"
      ],
      "run_at": "document_end"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{d7ff40a7-ef42-40e9-9529-78ad86dfc8be}"
    }
  }
}