Examine source code of Cisco Creeps

{
  "manifest_version": 2,
  "name": "Cisco Creeps",
  "version": "1.1",
  "description": "You can watch Creeps everywhere, but it's better in Cisco.",
  "icons": {
    "48": "icons/icon48.jpg"
  },
  "content_scripts": [
    {
      "matches": [
        "*://creeps.assistants.epita.fr/*"
      ],
      "js": [
        "creeps.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{de25c984-563e-4769-9291-a3da38e18b86}"
    }
  }
}