Examine source code of Dark Moodle

{
  "manifest_version": 3,
  "name": "Dark Moodle",
  "version": "2.2",
  "icons": {
    "16": "images/icon16.png",
    "32": "images/icon32.png",
    "48": "images/icon48.png",
    "128": "images/icon128.png"
  },
  "description": "Dark theme for UBS Moodle",
  "content_scripts": [
    {
      "css": [
        "./style.css"
      ],
      "matches": [
        "https://moodle.univ-ubs.fr/*",
        "https://cas.univ-ubs.fr/*"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{b6c864e2-2c58-41da-9a3d-999485670f20}"
    }
  },
  "content_security_policy": {}
}